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#compdef p4 p4d -value-,P4CLIENT,-default- -value-,P4PORT,-default- -value-,P4MERGE,-default- -value-,P4USER,-default-

# Maintainer: Peter Stephenson <pws@csr.com>.

# Increasingly loosely based on _cvs version 1.17.
# Completions currently based on Perforce release 2006.2.

# Styles, tags and contexts
# =========================
#
# If the `verbose' style is set (it is assumed by default), verbose
# descriptions are provided for many completed quantities derived
# dynamically such as subcommand names, labels, changes -- in fact,
# just about anything for which Perforce itself produces a verbose,
# one-line description.  It may be turned off in the context of each
# subcommand e.g.
#   zstyle ':completion:*:p4-labelsync:*' verbose false
# or for a particular tag, e.g. changes,
#   zstyle ':completion:*:changes' verbose false
# or just for top-level completion (i.e. up to and including completion
# of the subcommand):
#   zstyle ':completion:*:p4:*' verbose false
# or for p4 as a whole,
#   zstyle  ':completion:*:p4(-*|):*' verbose false
# This is actually handled by the `_describe' function underneath the
# Perforce completion system; it's mentioned here as verbosity adds
# significantly to a lot of the Perforce completions.
#
# Note that completing change numbers is not very useful if `verbose' is
# turned off.  There is no speed advantage for turning it off, either.
# (Changes are also known as changelists or changesets.  The functions
# and tags here all consistently use `changes'.)
#
# The style `max' can be set to a number which limits how many
# possibilities can be shown when selecting changes or jobs.  This is
# handled within Perforce, so the completion code may limit the number even
# further.  If not set explicitly, the value is taken to be 20 to avoid a
# huge database being output.  Set it to a larger number if necessary.
# Setting it explicitly to zero removes the maximum.  Because you see only
# the most recent, changes and jobs are shown in the order given by
# Perforce without further sorting.
#
# Completion of jobs can also be controlled by the `jobview' style.
# This uses the standard Perforce JobView syntax, and is applied
# in connection with the `max' style.  In other words,
# if you set
#   zstyle ':completion:*:p4-*:jobs' max 0
#   zstyle ':completion:*:p4-*:jobs' jobview 'user=pws'
# then jobs to be completed will be those from the output of
#   p4 jobs -e 'user=pws'
# i.e. those assigned to Perforce user `pws'.
#
# Completion of changes can be controlled by the `changes' style.
# This takes additional arguments to be passed to `p4 changes'.
# An obvious example is:
#   zstyle ':completion:*:p4-*:changes' changes -u $USER
# to limit changes to the present user.
#
# The style `all-files' is used to tell the completion system to
# complete any file in a given context.  This is for use in places
# where it would, for example, only complete files opened for editing.
# See the next section for more.
#
# The style `depot-files' tells the system to complete files by asking
# Perforce for a list where it would otherwise complete files locally by
# the standard mechanism --- basically any time you don't use // notation
# and there is no restriction e.g. to opened files only.  There is likely
# to be a significant speed penalty for this; it is turned off by default
# in all contexts.  The advantage is that it cuts out files not maintained
# by Perforce.  (Again, note this is a style, not a tag.)  Contexts
# where this might be particularly useful include p4-diff or p4-diff2.
#
# The tags depot-files and depot-dirs also exist; they are used whenever
# the system is completing files or directories by asking Perforce
# to list them, rather than by using normal file completion.
#
# The tag subdirs is used to complete the special `...' which tells
# Perforce to search all subdirectories.  Hence you can turn this
# feature off by suitably manipulating your tags.
#
# The function will usually try to limit the files it lists by
# context; for example, to just opened files.  By default it does
# this by retrieving the complete list from Perforce and then
# relying on the completion system to do the matching.  If this is
# slow, it is possible to set the style "glob", in which case the
# matching is done within Perforce, potentially reducing the amount of
# searching of Perforce's internal database.  The tag used for
# this is the same as the command used to retrieve the file name:
# integrated, opened, resolved, dirs, files.  The disadvantage
# of doing the matching within Perforce is that no matcher specification
# is applied; for example, it's not possible to match a_u.c against
# admin_utils.c.
#
# Actually, a hybrid strategy is used when the glob style is not set: the
# directory is passed literally to Perforce, but the file or directory
# being matched is passed as "*", so that matching on the contents of the
# directory is performed by the completion system.
#
# Experiment suggests that the glob style isn't usually needed: only
# "p4 integrated" is likely to be significantly slowed if no limiting
# pattern is applied, and completing only integrated files is uncommon.
#
# Completion of files and their revisions
# =======================================
#
# File completion handles @ and # suffixes.  If the filename is completed,
# typing @ or # removes the space which was automatically added.
# The context used has `at-suffix' or `hash-suffix' in the position
# before the tag to indicate suffix completion (as always, ^Xh will
# show you all possible contexts).  This makes it possible
# to select changes, dates, labels and clients using the tag-order
# style.  For example,
#    zstyle ':completion:*:p4-*:at-suffix:*' tag-order changes '*'
# will force all completion after `@' to show changes first.  Executing
# _next_tags (usually ^x^n) will cycle between that and the remaining
# tags (dates, labels, clients).  I recommend, at least, keeping labels
# later than changes since the former are less useful and can take a long
# time to complete.
#
# A # is automatically quoted when handled in this way; if the file is
# typed by hand or the completion didn't finish (e.g. you typed a character
# in the middle of menu completion), you probably need to type `\#' by
# hand.  The problem is that the completion system uses extended globbing
# and hence a pattern of the form `filename#' always matches `filename'
# (since e# matches any number of e's including one).  Hence this can look
# like an expansion which expands to `filename'.
#
# After @, you can complete changes (note the use of the style `max'
# above), labels, clients or even dates, while after `#' you can
# complete numeric revisions or the special revision names head, none,
# have.  These are available whether or not you completed the filename; if
# the file doesn't exist, numeric revisions won't work, but the rest will
# (though what Perforce will do with the resulting command is another matter).
#
# In addition, when completing after `file@', only changes specific to `file'
# will be shown (exactly the list of changes Perforce shows from the
# command `p4 changes file').  If this doesn't work, chances are that
# `file' does not exist.  Having a multi-directory match (literal `...')
# in `file' should work fine, since `p4 changes' recognises all normal
# Perforce file syntax.
#
# Some perforce commands allow you to specify a range of revisions or
# changes as `file@1,@2' or `file#1,#2'.  Currently, the second part of the
# revision range can always be completed (whether the command accepts them
# or not), but the comma after the first part of the range is only added
# automatically if the documentation suggests the command accepts ranges at
# that point.  This is an auto-removable suffix, so it will disappear if
# you hit space or return.  Typing a `#' at this point will insert a
# backslash, as before.  The # and @ are never added automatically; you
# have to select one by hand.
#
# Perforce allows change and revision numbers to be preceded by =, <, <=, >
# or >=.  See `p4 help undoc' for details.  (In particular, `=' is
# an extremely useful shortcut when integrating single changes.)
# This syntax is handled, but currently the < and > must be quoted
# with a backslash, not by any other mechanism.  For example,
#   p4 files myfile@\>=3<TAB>
# will complete a change number.  The valid syntax where the second
# change or revision in a range does not have the @ or # in front
# (for example `file@32183,32185') is not currently handled; the @
# must be repeated.
#
# File completion for some functions is restricted by the Perforce
# status of the file; for example, `p4 opened' only completes opened
# files (surprised?)  However, you can set the style (N.B. not tag)
# `all-files'; so, for example, you can turn off the limit in this case by
#   zstyle ':completion:*:p4-opened:*' all-files true
# Normally the `file-patterns' style would be used to control matching,
# but as the file types are not selected by globbing it doesn't work here
# However, if you set the all-files style, all filename completion is done
# by the standard mechanism; in this case, the `file-patterns' style works
# as usual.  The style `ignored-patterns' is available in any case, even
# without `all-files'; this is therefore generally the one to use.
#
# The style `whole-path' allows you complete the entire path to a file
# at once.  This is useful in cases such as opened files where the
# list of files is likely to be short but may include files with
# widely different paths.  As with the `glob' style, the tag is the
# Perforce disposition of the file: integrated, opened, resolved, dirs,
# files.  For example, with
#   zstyle ':completion:*:p4-revert:*:opened' whole-path true
# completion after `p4 revert' will offer you the entire depot path
# to a file rather than just part of the path at once (with the
# usual methods of disambiguation).  Directory completion is turned
# off during a `whole-path' completion.  The `whole-path' style can
# also take the value `absolute'; this means that an initial `/'
# activates `whole-path' completion, otherwise a relative file path
# will be completed in the normal way.  For example, with
#   zstyle ':completion:*:p4-revert:*:opened' whole-path absolute
# then after `p4 revert <TAB>' you are offered open files in the
# current directory plus directories; after `p4 revert /<TAB>' you
# are offered all open files in depot syntax.
#
# With `p4 diff', the shell will spot if you have used an option that
# allows you to diff unopened files (such as -f) and in that case offer
# all files; otherwise, it just offers opened files.
#
# Completion of changes
# =====================
#
# There is various extra magic available any time change numbers
# are completed, regardless of how this was reached, i.e.
# `p4 fixes -c ...' and `p4 diff filename.c@...' are treated the same way.
# Note, however, these only work if you are at the point where a change
# number would be completed.
#
# Firstly, as mentioned above there is a maximum for the number of
# changes which will be shown, given by the style max, or defaulting to 20.
# Only the most recent changes will be shown.  This is to avoid a speed
# penalty or clumsy output.  If a positive numeric argument is given
# when changes are being completed, the maximum is set (unconditionally)
# to that number instead.
#
# It is also possible to give a negative numeric prefix to a listing widget
# (i.e. typically whatever is bound to ^D).  If there is already a change
# number on the line, e.g. from cycling through a menu of choices, the full
# description for that change is shown in the format of a completion
# listing.  [TODO: this could be made configurable with a style.]
#
# It may be necessary to abandon the current completion attempt before
# typing this to force the completion system to display the new text.
# Replacing delete-char-or-list with the following user defined widget
# (create with `zle -N ...') will force this for any negative prefix argument.
#    (( ${NUMERIC:-0} < 0 )) && (( CURSOR = CURSOR ))
#    zle delete-char-or-list
#
# Completion of jobs
# =================
#
# Completing jobs uses the same logic for the numeric prefix as completing
# changes: a positive prefix changes the maximum number of jobs which
# will be shown, and a negative prefix when listing shows the full
# text for the job whose name is currently inserted on the command line.
# In this case, the entire text of the word being completed is assumed
# to constitute the job name (which is almost certainly correct).
#
# Completion of dates
# ===================
#
# In a file revision specification it is possible to give a date
# in the form file@YYYY/MM/DD:hh:mm:ss, which may be completed.  This
# is ever so slightly less silly than it sounds.  Any component entered
# by hand with the appropriate suffix will be ignored; any component
# completed will be set to the current value.  Hence you can easily
# specify, say, one month ago by using the completed value for all
# components except the month and setting that to one less.  The shell
# will also happily append the appropriate suffix if you try to complete
# after anything which is already the appropriate width.  (Perforce
# supports two-digit years, but these are confusing and no longer
# particularly useful as they refer to the twentieth century, so
# the shell does not.)
#
# Calls to p4
# ===========
#
# Much of the information from Perforce is provided by calls to p4
# commands.  This is done via the _call_program interface, as described
# in the zshcompsys manual page.  Hence a suitable context with the
# `command' style allows the user to take control of this call.
# The tags used are the name of the p4 command, or in the case of
# calls to help subcommands, `help-<subcommand>'.  Note that if the
# value of the style begins with `-', the arguments to the perforce
# command are appended to the remaining words of the style before calling
# the command.
#
# Programmes taking p4-style arguments
# ====================================
#
# It is possible to use the _perforce completion with other commands
# which behave like a subcommand of p4 by setting the service type
# to p4-<subcommand>.  For example,
#   compdef _perforce p4cvsmap=p4-files
# says that the command `p4cvsmap' takes arguments like `p4 files'.
# Often the options will be different; if this is a problem, you
# will need to write your own completer which loads _perforce and
# calls its functions directly.  You can add -global to the end
# of the service to say that the command also handles global
# Perforce options, comme ca:
#   compdef _perforce p4reopen=p4-job-global
#
# Anything more complicated should be modelled on one of the
# _perforce_cmd_* handlers below.  To get this to work, the full
# set of _perforce functions must be loaded; because of the way
# autoloading works, a trick is required:  call "_perforce -l" which
# causes the function to be executed, loading all the associated
# functions as a side effect, but tells _perforce to return without
# generating any completions.  For example, here is the completion
# for my `p4desc' function which is an enhanced version of `p4 describe'
# (without any handling for global Perforce arguments):
#
#  #compdef p4desc
#
#  _perforce -l
#
#  _arguments -s : \
#    '-d-[select diff option]:diff option:((b\:ignore\ blanks c\:context d\:basic\ diff n\:RCS s\:summary u\:unified w\:ignore\ all\ whitespace))' \
#    '-s[short form]' \
#    '-j[select by job]:job:_perforce_jobs' \
#    '*::change:_perforce_changes'
#
# To add handling of global options to this, see the end of the _perforce
# function below.  Something like:
#
#   local -a _perforce_global_options _perforce_option_dispatch
#   if _perforce_global_options; then
#     _arguments -s : $_perforce_option_dispatch \
#       '<other stuff>'
#   fi
#
# TODO
# ====
#
# No mechanism is provided for completely ignoring certain files not
# handled by Perforce as with .cvsignore.  This could be done ad hoc.
# However, the ignored-patterns style and the parameter $fignore are
# of course applied as usual, so setting ignored-patterns for the
# context `:completion:*:p4[-:]*' should work.

_perforce() {
  # rely on localoptions
  setopt nonomatch
  local p4cmd==p4 match mbegin mend
  integer _perforce_cmd_ind

  if [[ $1 = -l ]]; then
    # Run to load _perforce and associated functions but do
    # nothing else.
    return
  fi

  if [[ $service = -value-* ]]; then
    # Completing parameter value.
    # Some of these --- in particular P4PORT --- don't need
    # the perforce server.
    case $compstate[parameter] in
      (P4PORT)
      _perforce_hosts_ports
      ;;

      (P4CLIENT)
      _perforce_clients
      ;;

      (P4MERGE)
      _command_names -e
      ;;

      (P4USER)
      _perforce_users
      ;;
    esac
    # We do not handle values anywhere else.
    return
  fi

  if [[ $p4cmd = '=p4' ]]; then
    _message "p4 executable not found: completion not available"
    return
  fi

  # If we are at or after the command word, remember the
  # global arguments to p4 as we will need to pass these down
  # when generating completion lists.
  # This is both an array and a function, but luckily I never
  # get confused...
  local -a _perforce_global_options
  local -a _perforce_option_dispatch

  # If we are given a service of the form p4-cmd, treat this
  # as if it was after `p4 cmd'.  This provides an easy way in
  # for scripts and functions that emulate the behaviour of
  # p4 subcommands.  Note we don't shorten the command line arguments.
  if [[ $service = p4-(#b)(*) ]]; then
    local curcontext="$curcontext"
    local p4cmd=$words[1] cmd=$match[1] gbl

    if [[ $cmd = (#b)(*)-global ]]; then
      # Handles global options.
      cmd=$match[1]
      _perforce_global_options && gbl=1
    fi
    if (( $+functions[_perforce_cmd_$cmd] )); then
      curcontext="${curcontext%:*:*}:p4-${cmd}:"
      if [[ -n $gbl ]]; then
	# We are handling global Perforce options as well as the
	# arguments to the specific command.
	# To handle the latter, we need the command name, plus
	# all the arguments for the command with the global options
	# removed.  The function _perforce_service_dispatch handles
	# this by unshifting the command ($p4cmd) into words,
	# then dispatching for the Perforce subcommand $cmd.
	#
	# Has anyone noticed this is getting rather complicated?
	_arguments -s : $_perforce_option_dispatch \
	"*::p4-$cmd arguments: _perforce_service_dispatch $p4cmd $cmd"
      else
	_perforce_cmd_$cmd
      fi
      # Don't try to do full command handling.
      return
    else
      _message "unhandled _perforce service: $service"
      return 1
    fi
  fi

  if [[ $service = p4d ]]; then
    _arguments -s : \
      '-d[run as daemon]' \
      '-f[run as single threaded server]' \
      '-i[run for inetd using sockets]' \
      '-q[suppress startup message]' \
      '-s[run as NT service]' \
      '-xi[switch server database to unicode mode and quit]' \
      '-xu[run database upgrade and quit]' \
      '-c[run command and exit]:command of some sort: ' \
      '-Id[specify description]:description: ' \
      '-In[specify unique name]:name: ' \
      '-jc[checkpoint, save and truncate journal]::optional prefix: ' \
      '-jd[checkpoint, not saving journal]::optional file:_files' \
      '-jj[save and truncate journal]::optional prefix: ' \
      '-jr[incremental restore from checkpoint/journal]:'\
'file:_files:file:_files' \
      '-z[gzip checkpoint and journal files]' \
      '-h[show help]' \
      '-V[print server version]' \
      '-A[set audit log ($P4AUDIT)]:audit file:_files' \
      '-J[set journal file ($P4JOURNAL) or "off"]:journal file:_files' \
      '-L[set error log ($P4LOG or stderr)]:error log:_files' \
      '-p[set port ($P4PORT o perforce:1666)]:port:_perforce_hosts_ports' \
      '-r[set root directory ($P4ROOT)]:root directory:_path_files -g "*(/)"' \
      '-v[debug level]:level: '
  elif _perforce_global_options; then
    _arguments -s : $_perforce_option_dispatch \
    '1:perforce command:_perforce_commands'
  else
    (( _perforce_cmd_ind-- ))
    (( CURRENT -= _perforce_cmd_ind ))
    shift $_perforce_cmd_ind words
    _perforce_command_args
  fi
}


#
# Command and argument dispatchers
#

# Front end to _call_program to add in the global arguments
# passed to p4.  The first argument is the tag, the remaining
# arguments are passed to p4.  Typically the tag is the same
# as the first p4 argument.
(( $+functions[_perforce_call_p4] )) ||
_perforce_call_p4() {
  local cp_tag=$1
  shift
  # This is for our own use for parsing, and we need English output,
  # so...
  local +x P4LANGUAGE
  _call_program $cp_tag p4 "${_perforce_global_options[@]}" "$@"
}


# The list of commands is cached in _perforce_cmd_list, but we
# only generate it via this function when we need it.
(( $+functions[_perforce_gen_cmd_list] )) ||
_perforce_gen_cmd_list() {
  (( ${+_perforce_cmd_list} )) || typeset -ga _perforce_cmd_list
  local hline line match mbegin mend
  # Output looks like <tab>command-name<space>description in words...
  # Ignore blank lines and the heading line beginning `Perforce...'
  # Just gets run once, then cached, so don't bother optimising
  # this to a grossly unreadable parameter substitution.
  _perforce_call_p4 help-commands help commands | while read -A hline; do
    (( ${#hline} < 2 )) && continue
    [[ $hline[1] = (#i)perforce ]] && continue
    _perforce_cmd_list+=("${hline[1]}:${hline[2,-1]}")
  done
  # Also cache the server version for nefarious purposes.
  _perforce_call_p4 info info | while read line; do
    if [[ $line = (#b)"Server version: "*/*/(<->.<->)(.[^/]|)/*" "* ]]; then
      _perforce_server_version=$match[1]
    fi
  done

  # Unsupported commands: we could look through p4 help undoc, I suppose.
  # I can't be bothered to check the date when they appeared any more,
  # but let's at least check they're not already there.
  local -a unsup
  unsup=(
    "attribute:set attributes for open file (EXPERIMENTAL)"
    "dbschema:report meta database information"
    "export:extract journal or checkpoint records"
    "interchanges:report changes not yet integrated between branches"
    "replicate:poll for journal changes and apply to another server"
    "spec:allows limited changes to form specifications (admin)"
  )
  for line in $unsup; do
    if [[ ${_perforce_cmd_list[(r)${line%%:*}:*]} = '' ]]; then
      _perforce_cmd_list+=($line)
    fi
  done
}


(( $+functions[_perforce_commands] )) ||
_perforce_commands() {
  (( ${#_perforce_cmd_list} )) || _perforce_gen_cmd_list
  _describe -t p4-commands 'Perforce command' _perforce_cmd_list
}


(( $+functions[_perforce_command_args] )) ||
_perforce_command_args() {
  local curcontext="$curcontext" cmd=${words[1]}
  if (( $+functions[_perforce_cmd_$cmd] )); then
    curcontext="${curcontext%:*:*}:p4-${cmd}:"
    _perforce_cmd_$cmd
  else
    _message "unhandled perforce command: $cmd"
  fi
}


(( $+functions[_perforce_service_dispatch] )) ||
_perforce_service_dispatch() {
  # Put the original command name back, then dispatch for
  # our Perforce handler.
  words=($1 "$words[@]")
  (( CURRENT++ ))
  _perforce_cmd_$2
}


#
# Helper functions
#

(( $+functions[_perforce_global_options] )) ||
_perforce_global_options() {
  # Options with arguments we need to pass down when calling
  # p4 from completers.  There are no options without arguments
  # we need to pass.  (Don't pass down -L language since we
  # parse based on English output.)
  local argopts_pass="cCdHpPu"
  # Other options which have arguments but we shouldn't pass down.
  # There are some debugging options, but they tend to get used
  # with the argument in the same word as the option, in which
  # case they will be handled OK anyway.
  local argopts_ignore="Lx"

  # The options we support in the form for _arguments.
  # This is here for modularity and convenience, but note that since the
  # actual dispatch takes place later, this is not local to this
  # function and so must be made local in the caller.
  _perforce_option_dispatch=(
    '-c+[client]:client:_perforce_clients' \
    '-C+[charset]:charset:_perforce_charsets' \
    '-d+[current directory]:directory:_path_files -g "*(/)"' \
    '-H+[hostname]:host:_perforce_hosts' \
    '-G[python output]' \
    '-L+[message language]:language: ' \
    '-p+[server port]:port:_perforce_hosts_ports' \
    '-P+[password on server]:password: ' \
    '-s[output script tags]' \
    '-u+[user]:user name:_perforce_users' \
    '-x+[filename or -]:file:_perforce_files_or_minus' \
    '-z+[select output format]:output format:(tag)'
  )

  integer i

  # We need to try and check if we are before or after the
  # subcommand, since some of the options with arguments, in particular -c,
  # work differently.  It didn't work if I just added '*::...' to the
  # end of the arguments list, anyway.
  for (( i = 2; i < CURRENT; i++ )); do
    if [[ $words[i] = -[$argopts_pass$argopts_ignore] ]]; then
      # word with following argument --- check this
      # is less than the current word, else we are completing
      # this and shouldn't pass it down
      if [[ $(( i + 1 )) -lt $CURRENT && \
	$words[i] = -[$argopts_pass] ]]; then
	_perforce_global_options+=(${words[i,i+1]})
      fi
      (( i++ ))
    elif [[ $words[i] = -[$argopts_pass]* ]]; then
      # word including argument which we want to keep
      _perforce_global_options+=(${words[i]})
    elif [[ $words[i] != -* ]]; then
      break
    fi
  done

  (( _perforce_cmd_ind = i ))
  (( _perforce_cmd_ind >= CURRENT ))
}

(( $+functions[_perforce_branches] )) ||
_perforce_branches() {
  local bline match mbegin mend
  local -a bl
  bl=(${${${(f)"$(_perforce_call_p4 branches branches 2>/dev/null)"}##Branch }/ /:})
  [[ $#bl -eq 1 && $bl[1] = '' ]] && bl=()
  (( $#bl )) && _describe -t branches 'Perforce branch' bl
}


(( $+functions[_perforce_changes] )) ||
_perforce_changes() {
  local cline match mbegin mend max ctype num comma file
  local -a cl cstatus amax xargs

  zstyle -s ":completion:${curcontext}:changes" max max || max=20
  zstyle -a ":completion:${curcontext}:changes" changes xargs
  if [[ ${NUMERIC:-0} -lt 0 && -z $compstate[insert] ]]; then
    # Not inserting (i.e. just listing) and given a negative
    # prefix argument.  Instead of listing possible completions,
    # show the full description for the change number on the line at
    # the moment.
    [[ $PREFIX = (|*[^[:digit:]])(#b)(<->) ]] && num+=$match[1]
    [[ $SUFFIX = (#b)(<->)* ]] && num+=$match[1]
    if [[ -n $num ]]; then
      _message -r "$(_perforce_call_p4 describe describe $num)"
      return 0
    fi
  elif [[ ${NUMERIC:-0} -gt 0 ]]; then
    max=$NUMERIC
  fi

  (( max )) && amax=(-m $max)

  # Hack: assume the arguments we want are at the end.
  while [[ $argv[-1] = -t? ]]; do
    case $argv[-1] in
      # Change embedded in filename; extract that and remove
      # the corresponding prefix.  Remove possible `#'s, too,
      # in case we are looking at a range.
      (-tf)
      file=${${(Q)PREFIX}%%[\#@]*}
      compset -P '*@(|\\\<|\\\>)(|=)'
      ;;

      # Changes already submitted
      (-ts)
      cstatus=(-s submitted)
      ctype="submitted "
      ;;

      # Changes still pending
      (-tp)
      cstatus=(-s pending)
      ctype="pending "
      ;;

      # Changes still pending and on the current client.
      # Many uses of pending changes must be on the current client
      # to be meaningful, in particular submitting a change or
      # associating a file or operation with a particular change.
      (-tc)
      # Don't like this way of extracting the client to use,
      # but I don't see a simpler one.  We do at least make sure
      # we call p4 with the same arguments as we will use with p4 changes.
      cstatus=(-s pending -c "$(_perforce_call_p4 client client -o |
awk '/^Client:/ { print $2 }')")
      ctype="local pending "
      ;;

      # Changes that were shelved
      (-tS)
      cstatus=(-s shelved)
      ctype="shelved "
      ;;

      # Range allowed: append comma and supply rules for
      # removing and handling subsequent `#'.
      (-tR)
      comma=(-S, -R _perforce_file_suffix)
    esac
    argv=($argv[1,-2])
  done
  # Limit to the 20 most recent changes by default to avoid huge
  # output.
  cl=(
${${${${(f)"$(_perforce_call_p4 changes changes $amax $xargs $cstatus \$file)"}##Change\ }//\ on\ /:}/\ by\ /\ }
  )
  # "default" can't have shelved files in it...
  [[ $ctype = shelved* ]] || cl+=("default:change not yet numbered")
  [[ $#cl -eq 1 && $cl[1] = '' ]] && cl=()
  _describe -t changes "${ctype}change" cl -V changes-unsorted $comma
}


(( $+functions[_perforce_charsets] )) ||
_perforce_charsets() {
  local expl
  _wanted charset expl 'character set' \
    compadd eucjp iso8859-1 shiftjis utf8 winansi
}


(( $+functions[_perforce_clients] )) ||
_perforce_clients() {
  local -a slash cl

  # Are we completing after an @, or a client view in a filespec?
  if ! compset -P '*@'; then
    compset -P '//' && slash=(-S/ -q)
  fi

  cl=(${${${(f)"$(_perforce_call_p4 clients clients)"}##Client\ }/\ /:})
  [[ $#cl -eq 1 && $cl[1] = '' ]] && cl=()
  _describe -t clients 'Perforce client' cl $slash
}


(( $+functions[_perforce_counters] )) ||
_perforce_counters() {
  local cline match mbegin mend
  local -a cl

  cl=(${${${(f)"$(_perforce_call_p4 counters counters)"}/\ /:}/\=/current value})
  [[ $#cl -eq 1 && $cl[1] = '' ]] && cl=()
  _describe -t counters 'Perforce counter' cl
}


(( $+functions[_perforce_counter_values] )) ||
_perforce_counter_values() {
  if [[ -n $words[CURRENT-1] ]]; then
    local value="$(_perforce_call_p4 counter counter $words[CURRENT-1] 2>/dev/null)"
    if [[ -n $value ]]; then
      # No space.  This allows stuff like incarg and decarg.
      compstate[insert]=1
      _wanted value expl 'counter value' compadd $value
    fi
  fi
}


(( $+functions[_perforce_dates] )) ||
_perforce_dates() {
  # Only useful in a file spec after `@'.
  compset -P '*@(|\\\<|\\\>)(|=)'

  # Date/time now in format required by Perforce.
  local now="$(date +%Y:%m:%d:%T)" name prefix
  local -a nowarray offer opts matchpats suffixes names
  nowarray=(${(s.:.)now})

  names=(   year month day\ of\ month hour minute second)
  suffixes=(  /    /    :               :     :     ''  )

  integer i
  prefix=${(Q)PREFIX}
  for (( i = 6; i >= 1; i-- )); do
    # Match from the most specific back.
    # The following is one of those occasions where zsh
    # substitution skips to the right answer without ever
    # passing through the real world on the way.
    if [[ $prefix = *${(j.*.)~suffixes[1,i-1]}* ]]; then
      (( i > 1 )) && compset -P "*$suffixes[i-1]"
      # If what's there already is the right length,
      # just accept it and add the suffix.
      prefix=${(Q)PREFIX}
      if [[ ${#prefix} = ${#nowarray[i]} ]]; then
	offer=($prefix)
      else
	offer=($nowarray[i])
      fi
      [[ -n $suffixes[i] ]] && opts=(-S $suffixes[i] -q)
      name=$names[i]
      break
    fi
  done

  _describe -t dates $name offer $opts
}


(( $+functions[_perforce_dbtables] )) ||
_perforce_dbtables() {
  local -a tables
  tables=(archmap bodtext change changex counters depot domain have integ
    integed ixtext label locks resolve rev revcx revdx revhx revsx trigger
    user view working)
  _describe -t db-table "DB table" tables
}


(( $+functions[_perforce_depots] )) ||
_perforce_depots() {
  local dline match mbegin mend
  local -a dl

  dl=(${${${(f)"$(_perforce_call_p4 depots depots)"}##Depot\ }/\ /:})
  [[ $#dl -eq 1 && $dl[1] = '' ]] && dl=()
  _describe -t depots 'depot name' dl
}


(( $+functions[_perforce_files_or_minus] )) ||
_perforce_files_or_minus() {
  _alternative 'minus:minus sign:(-)' 'files:file name:_files'
}


(( $+functions[_perforce_file_suffix] )) ||
_perforce_file_suffix() {
  # Used with compadd -R to handle @ or # after a file name.
  # Differs from compadd -r '...' in that it quotes `#' if typed.
  [[ $1 = 1 ]] || return

  if [[ $LBUFFER[-1] = [\ ,] ]]; then
    if [[ $KEYS = '#' ]]; then
      if [[ $LBUFFER[-1] = , ]]; then
	# Range: no suffix removal but add a backslash
	LBUFFER+=\\
	  else
	# Suffix removal with an added backslash
	LBUFFER="$LBUFFER[1,-2]\\"
      fi
    elif [[ $KEYS = (*[^[:print:]]*|[[:blank:]\;\&\|]) || \
      ( $KEYS = @ && $LBUFFER[-1] = ' ' ) ]] ; then
      # Normal suffix removal
      LBUFFER="$LBUFFER[1,-2]"
    fi
  elif [[ $LBUFFER[-1] = / ]]; then
    # Normal suffix removal for directories.
    if [[ $KEYS = (*[^[:print:]]*|[[:blank:]\;\&\|/]) ]]; then
      LBUFFER="$LBUFFER[1,-2]"
    fi
  fi
}


# Helper function for the helper function for the helper functions
# for the helper function _perforce_files.
#
# Check if we should do whole-path completion.
# The argument is the Perforce disposition of files are looking at.
_perforce_whole_path() {
  local wp

  zstyle -s ":completion:${curcontext}:$1" whole-path wp
  case $wp in
    (true|yes|on|1)
    return 0
    ;;

    (absolute)
    [[ ${(Q)PREFIX} = /* ]] && return 0
    ;;
  esac

  return 1
}

#
# Helper function for the helper functions for the helper function
# _perforce_files.  This is common code to retrieve a list of files
# from Perforce.
#
# First argument is the p4 subcommand used to list the files.
# This is also used as a tag for the style to decide whether
# to limit the list within Perforce.
# Remaining arguments are additional arguments to compadd.
#
(( $+functions[_perforce_retrieve_files] )) ||
_perforce_retrieve_files() {
  local pfx
  local -a files

  if _perforce_whole_path $1; then
    files=(${${(f)"$(_perforce_call_p4 $1 $1 2>/dev/null)"}%%\#*})
  elif zstyle -t ":completion:${curcontext}:$1" glob; then
    # Limit the list by using Perforce to glob the pattern.
    # This may be faster, but won't use matcher specs etc.
    pfx=${(Q)PREFIX}
    compset -P '*/'
    files=(${${${(f)"$(_perforce_call_p4 $1 $1 \"\$pfx\*\$\{\(Q\)SUFFIX\}\" 2>/dev/null)"}%%\#*}##*/})
  else
    # We need to limit the list to a directory.
    if [[ $PREFIX = */* ]]; then
      pfx="${(Q)${PREFIX%/*}}/*"
    else
      pfx="*"
    fi
    compset -P '*/'
    files=(${${${(f)"$(_perforce_call_p4 $1 $1 \$pfx 2>/dev/null)"}%%\#*}##*/})
  fi
  [[ $#files -eq 1 && $files[1] = '' ]] && files=()
  shift
  compadd "$@" -a files
}


#
# Helper functions for the helper function _perforce_files.  These files
# are low-level enough that they don't handle tags; this is done
# by the _alternative handler in _perforce_files.
#

(( $+functions[_perforce_integrated_files] )) ||
_perforce_integrated_files() {
  local pfx=${(Q)PREFIX} type
  local -a files

  _perforce_retrieve_files integrated "$@"
}


(( $+functions[_perforce_opened_files] )) ||
_perforce_opened_files() {
  local type
  local -a files

  _perforce_retrieve_files opened "$@"
}


(( $+functions[_perforce_resolved_files] )) ||
_perforce_resolved_files() {
  _perforce_retrieve_files resolved "$@"
}


# This has no other function than to offer to add the `...' used
# by Perforce to indicate a recursive search of directories.
# Bit pathetic, really.
#
# This has been causing odd effects with prefixes so is turned off.
#(( $+functions[_perforce_subdirs] )) ||
#_perforce_subdirs() {
#  if [[ $PREFIX = */* ]]; then
#    local dir=${PREFIX%%[^/]#}
#    compadd "$@" -J subdirs -p $dir ...
#  else
#    compadd "$@" -J subdirs ...
#  fi
#}


(( $+functions[_perforce_depot_dirs] )) ||
_perforce_depot_dirs() {
  # Normal completion of directories in depots

  _perforce_retrieve_files dirs "$@" -S / -q
}


(( $+functions[_perforce_depot_files] )) ||
_perforce_depot_files() {
  # Normal completion of files in depots

  _perforce_retrieve_files files "$@" -R _perforce_file_suffix
}


(( $+functions[_perforce_client_dirs] )) ||
_perforce_client_dirs() {
  # This is a slightly odd addition which isn't often necessary.
  # When completing directories in a client specification, Perforce
  # doesn't tell you about intermediate directories which are in
  # the client, but not in the depot.  (Well... sometimes.  I've
  # had some odd results with this.  I suspect there may be a bug
  # but I don't really know enough to be sure.)
  #
  # For example, if my view contains
  #   //depot/branches/rev1.2/...   //pws_client/branches/rev1.2/...
  # then `p4 dirs "//pws_client/*"' won't mention the `branches'
  # directory because the view actually starts lower down.  So
  # we add it by hand when necessary.
  #
  # We don't want to waste time on this, since it's not the usual
  # case, so we cache the results where necessary.  This means
  # recording all the clients that we can later ask about if necessary.
  # To flush the cache, `unset _perforce_client_list _perforce_client_dirs'.
  if (( ! ${+_perforce_client_list} )); then
    # Retrieve the list of clients.
    typeset -gA _perforce_client_list
    local -a tmplist
    local tmpelt
    tmplist=(${${${(f)"$(_perforce_call_p4 clients clients)"}##Client\ }%%\ *})
    [[ $#tmplist -eq 1 && $tmplist[1] = '' ]] && tmplist=()
    for tmpelt in $tmplist; do
      _perforce_client_list[$tmpelt]=1
    done
  fi

  # See if the first path element is a client.  Very often it
  # will actually be a depot, so we test this as quickly as possible.
  local client=${${PREFIX##//}%%/*}
  [[ -z ${_perforce_client_list[$client]} ]] && return 1

  local oldifs=$IFS IFS= type dir line dirs

  (( ${+_perforce_client_dirs} )) || typeset -gA _perforce_client_dirs

  if (( ${+_perforce_client_dirs[$client]} )); then
    # Already cached, although may be empty.
    dirs=${_perforce_client_dirs[$client]}
  else
    # We need to look at the View stanza of the client record
    # to see what directories exist in the client view.
    _perforce_call_p4 client "client -o $client" 2>/dev/null | while read line
    do
      case $line in
	([[:blank:]]##)
	type=
	;;

	((#b)([[:alpha:]]##):*)
	type=${match[1]}
	;;

	(*)
	if [[ $type = View ]]; then
	  dir=${${line##[[:blank:]]##//*[[:blank:]]//$client}%%/...(/*|)}
	  if [[ $#dir -gt 1 ]]; then
	    dirs+="${dirs:+ }${(q)dir##/}"
	  fi
	fi
	;;
      esac
    done
  fi

  (( ${#dirs} )) || return 1

  # Turn our string of space-separated backquoted elements into an array.
  dirs=(${(z)dirs})
  # Get the current prefix also as an array of elements
  compset -P '//[^/]##/'
  pfx=(${(s./.)${(Q)PREFIX}})

  local -a ndirs
  local match mbegin mend
  # Check matching path segments
  while (( ${#pfx} > 1 )); do
    ndirs=()
    for dir in $dirs; do
      if [[ $dir = $pfx/(#b)(*) ]]; then
	ndirs+=($match[1])
      fi
    done
    (( ${#ndirs} )) || return 1
    dirs=($ndirs)
    shift pfx
    compset -P '[^/]'
  done
  compadd -S / -q "$@" -- ${dirs%%/*}
}

(( $+functions[_perforce_files] )) ||
_perforce_files() {
  local pfx fline expl opt match mbegin mend range type
  local -a files types

  local dodirs unmaintained
  # Suffix operations can modify context
  local curcontext="$curcontext"
  # Used to inhibit directory completion
  local nodirs

  while (( $# )); do
    if [[ $1 = -t(#b)(?) ]]; then
      case $match[1] in
	(d)
	dodirs=-/
	;;

	(u)
	unmaintained=1
	;;

	(i)
	types+=(integrated)
	;;

	(o)
	types+=(opened)
	;;

	(r)
	types+=(resolved)
	;;

	(R)
	range="-tR"
	;;
      esac
    fi
    shift
  done

  # Remove the quotes present in the word on the command line,
  # since we will treat this as a literal string from now on.
  # We might get into problems with characters recognised as
  # special by p4 files and p4 dirs, but worry about that later.
  pfx=${(Q)PREFIX}

  if [[ -prefix *@ ]]; then
    # Modify context to indicate we are in a suffix.
    curcontext="${curcontext%:*}:at-suffix"
    # Check for existing range syntax
    [[ $PREFIX = *[@\#]*,* ]] && range=
    # After @ you can specify changes, clients, labels or dates.
    # Note we don't remove the prefix here; we leave it to the
    # subcommand.  This is in case it needs information from
    # the prefix; _perforce_changes uses this to limit the
    # output to relevant changes.
    _alternative \
      "changes:change:_perforce_changes $range -tf" \
      clients:client:_perforce_clients \
      "labels:label:_perforce_labels -tf" \
      'dates:date (+ time):_perforce_dates'
  elif [[ -prefix *\# ]]; then
    # Modify context to indicate we are in a suffix.
    curcontext="${curcontext%:*}:hash-suffix"
    # Check for existing range syntax
    [[ $PREFIX = *[@\#]*,* ]] && range=
    # Remove longest possible tail match to get name --- this
    # automatically handles filenames in ranges e.g. `foo#1,#3'.
    # (Note the compset removes the maximum possible head match,
    # so we only complete the second part of the range in that case.)
    _perforce_revisions $range
  elif [[ $PREFIX = //* ]]; then
    # This specifies files already handled by Perforce, so there's
    # no point trying to look for unmaintained files.  Assume
    # the user knows what they're doing.
    local -a altfiles
    integer whole_path

    for type in $types; do
      _perforce_whole_path $type && whole_path=1
    done

    # If we're doing whole-path completion, and the user starts
    # a completion early, assume they want just those files,
    # rather than a client spec.  This isn't necessarily the case,
    # but there's an excellent chance it does fit the user's intention
    # in a case where it's not really worth adding a special option.
    # A client list can be huge and they're not actually used very
    # often to refer to files.  In fact, this whole completion
    # probably ought to be optional (you can do it with tags if
    # you really want).
    if [[ $PREFIX = //[^/]# && $whole_path -eq 0 ]]; then
      # Complete //clientname spec.  Don't complete non-directories...
      # I don't actually know if they are valid here.
      altfiles+=("clients:Perforce client:_perforce_clients")
    else
      local donefiles=1
      if [[ -z $dodirs ]]; then
	if [[ ${#types} -gt 0 ]] &&
	  ! zstyle -t ":completion:${curcontext}:" all-files; then
	  for type in $types; do
	    altfiles+=("$type-files:$type file:_perforce_${type}_files")
	  done
	  (( whole_path )) && nodirs=1
	else
	  altfiles+=("depot-files:file in depot:_perforce_depot_files")
	fi
      fi
      if [[ -z $nodirs ]]; then
	# Intermediate directories in a client view.
	# See function for notes.
	altfiles+=("client-dirs:client directory:_perforce_client_dirs")
      fi
    fi
    altfiles+=("depot-dirs:directory in depot:_perforce_depot_dirs"
#      "subdirs:subdirectory search:_perforce_subdirs"
    )
    _alternative $altfiles
  elif [[ -n $unmaintained && -z $dodirs ]]; then
    # a la _cvs_nonentried_files: directories are never maintained,
    # so skip 'em.  Unmaintained files can't be integrated, opened
    # or resolved, so treat as exclusive (just as well, since
    # this bit's messy).
    local MATCH MBEGIN MEND
    local -a omitpats

    match=()
    : ${PREFIX:#(#b)(*/)(*)}
    pfx="$match[1]"
    pfx=${(e)~pfx}
    # Exclude both files already known to perforce, plus
    # those opened.  There will be some overlap but we need
    # to exclude files that are already opened for add.
    omitpats=(
      ${${${${(f)"$(_perforce_call_p4 files files \"\$pfx\*\$\{\(Q\)SUFFIX\}\" 2>/dev/null)"}%\#*}##*/}//(#m)[][*?()<|^~#\\]/\\$MATCH}
      ${${${${(f)"$(_perforce_call_p4 opened opened \"\$pfx\*\$\{\(Q\)SUFFIX\}\" 2>/dev/null)"}%\#*}##*/}//(#m)[][*?()<|^~#\\]/\\$MATCH}
	)

    [[ $#omitpats -eq 1 && $omitpats[1] = '' ]] && omitpats=()
    if (( ${#omitpats} )); then
      _path_files -g "*~(*/|)(${(j:|:)~omitpats})(D.)"
    else
      _path_files
    fi
    # Don't handle suffixes for non-entried files
  elif (( ${#types} )) && ! zstyle -t ":completion:${curcontext}:" all-files
    then
    local -a altfiles

    for type in $types; do
      altfiles+=("$type-files:$type file:_perforce_${type}_files")
      _perforce_whole_path $type && nodirs=1
    done

    if [[ -z $nodirs ]]; then
#      altfiles+=("subdirs:subdirectory search:_perforce_subdirs")
      if zstyle -t ":completion:${curcontext}:" depot-files; then
	altfiles+=("depot-dirs:directory in depot:_perforce_depot_dirs")
      else
	altfiles+=("directories:directory:_path_files -/")
      fi
    fi
    _alternative $altfiles
  elif zstyle -t ":completion:${curcontext}:" depot-files; then
    local -a altfiles
    if [[ -z $dodirs ]]; then
      altfiles+=("depot-files:file in depot:_perforce_depot_files")
    fi
    altfiles+=("depot-dirs:directory in depot:_perforce_depot_dirs"
#      "subdirs:subdirectory search:_perforce_subdirs"
    )
    _alternative $altfiles
  else
    # Look locally.
#   _alternative \
#      "files:file:_path_files -R _perforce_file_suffix $dodirs" \
#      "subdirs:subdirectory search:_perforce_subdirs"
    _path_files -R _perforce_file_suffix $dodirs
  fi
}


#
# Remaining helpers for other types of Perforce metadata.
#

(( $+functions[_perforce_filetypes] )) ||
_perforce_filetypes() {
  local -a values
  if compset -P '*+*'; then
    # That second `*' is deliberate --- only complete the last
    # letter since we can have a whole string of them.
    values=(
      "m:always set modtime on client"
      "w:always writeable on client"
      "x:set exec bit on client"
      "k:full RCS keyword expansion"
      "ko:RCS expansion only for Id, Header"
      "l:exclusive open, disallow multiple opens"
      "C:server stores compress file per revision"
      "D:server stores deltas in RCS format"
      "F:server stores full file per revision"
      "S:server stores only head revision"
      "X:externally archived file"
    )
    _describe -t file-modifiers 'Perforce file modifier' values
  else
    values=(
      "text:text, translate newlines"
      "binary:raw bytes"
      "symlink:symbolic link"
      "apple:Mac resource + data"
      "unicode:text, translate newlines, store as UTF-8")
    _describe -t file-types 'Perforce file type' values -S+ -q
  fi
}


(( $+functions[_perforce_fstat_fields] )) ||
_perforce_fstat_fields() {
  local sep
  if [[ $argv[-1] = -tv ]]; then
    # jobview, space is separator
    sep=' '
  else
    sep=','
  fi
  local -a values
  # yes, "phew", sorry.
  # output from "p4 help fstat" gives fields like
  #    digest               -- MD5 digest (fingerprint)
  # etc. etc.
  values=(
    ${${${${(M)${(f)"$(_perforce_call_p4 help-fstat help fstat)"}:#[[:blank:]]#[a-zA-Z]##(|\#)[[:blank:]]##--*}##[[:blank:]]#}:#fstat *}//[[:blank:]]##--[[:blank:]]##/:}
  )
  compset -P '*[,[:blank:]]'
  _describe -t fstat-fields 'Perforce fstat fields' values -S, -q
}


(( $+functions[_perforce_groups] )) ||
_perforce_groups() {
  local -a values
  values=($(_perforce_call_p4 groups groups))
  _describe -t groups 'Perforce group' values
}


(( $+functions[_perforce_hosts] )) ||
_perforce_hosts() {
  local expl host
  # Completion for p4 -H; other forms of host completion
  # go through _perforce_hosts_ports.
  # From Felix: if the client specifies a hostname, there's
  # no point using any other host, since it won't work.
  host=$(_perforce_call_p4 client client -o |
    awk '$1 ~ /^Host:/ {print $2}' )
  if [[ -n $host ]]; then
    _wanted hosts expl host compadd "$@" $host
  else
    _hosts
  fi
}


(( $+functions[_perforce_hosts_ports] )) ||
_perforce_hosts_ports() {
  if compset -P '*:'; then
    _ports
    local expl
    _wanted ports expl port compadd "$@" 1666
  else
    # is this -q-able?
    _hosts -S :
  fi
}

(( $+functions[_perforce_jobs] )) ||
_perforce_jobs() {
  # Optional argument is jobview for limiting jobs.
  local jline match mbegin mend max jobview
  local -a jl amax ajobview

  zstyle -s ":completion:${curcontext}:jobs" max max || max=20
  # Hack: if there is a job view, it is at the end.
  # This is nasty, it's really unnecessarily difficult to
  # pass arguments within completion functions...
  if [[ $argv[-2] = -e ]]; then
    ajobview=(-e "${(q)argv[-1]}")
    argv=("${(@)argv[1,-3]}")
  else
    zstyle -s ":completion:${curcontext}:jobs" jobview jobview &&
    ajobview=(-e $jobview)
  fi
  if [[ ${NUMERIC:-0} -lt 0 && -z $compstate[insert] ]]; then
  # Not inserting (i.e. just listing) and given a negative
  # prefix argument.  Instead of listing possible completions,
  # show the full description for the job which is on the line at
  # the moment.
    _message -r "$(_perforce_call_p4 jobs jobs -e \"Job=\$PREFIX\$SUFFIX\" -l 2>/dev/null)"
    return 0
  elif [[ ${NUMERIC:-0} -gt 0 ]]; then
    max=$NUMERIC
  fi

  (( max )) && amax=(-m $max)

  _perforce_call_p4 jobs jobs $ajobview $amax | while read jline; do
    if [[ $jline = (#b)([^[:blank:]]##)' '[^[:blank:]]##' '(*) ]]; then
      jl+=("${match[1]}:${match[2]}")
    fi
  done
  _describe -t jobs 'Perforce job' jl -V jobs-unsorted
}

(( $+functions[_perforce_jobviews] )) ||
_perforce_jobviews() {
  # Jobviews (see `p4 help jobview') are ways of interrogating the
  # jobs/fixes database.  It's basically either a set of strings,
  # or a set of key=value pairs, or some combination, separated
  # by various logical operators.  The `=' could be a comparison,
  # but we don't currently bother with that here; it's a bit cumbersome
  # to complete.
  local line type oldifs=$IFS IFS= key value slash=/
  local match mbegin mend
  # This is simply to split out two space-delimited words a backreferences.
  local m2words
  m2words='(#b)[[:blank:]]##([[:alnum:]]##)[[:blank:]]##([^[:blank:]]##)'

  local -a valuespec
  local -A p4fields p4values

  # All the characters which can separate multiple match attempts.
  # Ignore up to the last one.  We don't try to complete these.
  compset -P '*[[:blank:]\^\&\|\(\)]'

  # According to the manual, `p4 jobspec' requires admin privileges.
  # If this is true even of `p4 jobspec -o', we are a bit screwed.
  _perforce_call_p4 jobspec jobspec -o 2>/dev/null | while read line; do
    case $line in
      ([[:blank:]]##)
      type=
      ;;

      ((#b)([[:alpha:]]##):*)
      type=${match[1]}
      ;;

      (*)
      case $type in
	# This stanza tells us all the allowed fields.
	(Fields)
	if [[ $line = [[:blank:]]##<->${~m2words}* ]]; then
	  p4fields[${(L)match[1]}]=${match[2]}
	fi
	;;

	# This stanza gives allowed values for the `select' types.
	(Values)
	if [[ $line = ${~m2words}* ]]; then
	  p4values[${(L)match[1]}]=${match[2]}
	fi
	;;
      esac

      ;;
    esac
  done

  IFS=$oldifs

  if (( ! ${#p4fields} )); then
    # We didn't get anything; add the defaults.
    p4fields=(
      date		date
      description	text
      job		word
      status		select
      user		word
    )
    p4values=(
	    status	open/suspended/closed
	)
  fi

  for key in ${(k)p4fields}; do
    if [[ -n ${p4values[$key]} ]]; then
      valuespec+=("${key}:${p4fields[$key]}:(${p4values[$key]//$slash/ })")
    elif [[ $key = job ]]; then
      # Nothing special for jobs; add our own completion.
      valuespec+=("${key}:Perforce job:_perforce_jobs")
    elif [[ $key = user ]]; then
      # Nothing provided for user; add our own completion.
      valuespec+=("${key}:user:_perforce_users")
    else
      valuespec+=("${key}:${p4fields[$key]}: ")
    fi
  done

  _values 'Job specification parameter' $valuespec
}

(( $+functions[_perforce_labels] )) ||
_perforce_labels() {
    local lline file
    local -a ll match mbegin mend

    if [[ $argv[-1] = -tf ]]; then
      argv=($argv[1,-2])
      # Completing after `@'.
      file=${${(Q)PREFIX}%%@*}
      compset -P '*@(|\\\<|\\\>)(|=)'
    fi

    ll=(${${(f)"$(_perforce_call_p4 labels labels ${file:+\$file})"}//(#b)Label\ ([^[:blank:]]##)\ (*)/$match[1]:$match[2]})
    _describe -t labels 'Perforce label' ll
}


(( $+functions[_perforce_revisions] )) ||
_perforce_revisions() {
  # Doesn't handle standard completion options; requires space
  # in front if used as action in _arguments.

  local rline match mbegin mend comma expl pfx
  local -a rl

  if [[ $1 = -tR ]]; then
    # handle ranges
    comma=(-S, -R _perforce_file_suffix)
	shift
  fi

  # Beware of @foo,#bar; stupid but valid.
  pfx=${${(Q)PREFIX}%%[\#@]*}
  compset -P '*\#(|\\\<|\\\>)(|=)'

  # Numerical revision numbers, possibly with text.
  if [[ -z $PREFIX || $PREFIX = <-> ]]; then
    # always allowed (same as none)
    rl+=(0)
    _perforce_call_p4 filelog 'filelog $pfx' 2>/dev/null | while read rline; do
      if [[ $rline = (#b)'... #'(<->)' change '(*) ]]; then
	rl+=("${match[1]}:${match[2]}")
      fi
    done
  fi
  # Non-numerical (special) revision names.
  if [[ -z $PREFIX || $PREFIX != <-> ]]; then
    rl+=('head:head revision' 'none:empty revision'
      'have:current synced revision')
  fi
  _describe -t revisions 'revision' rl -V revisions-unsorted $comma
}


(( $+functions[_perforce_statuses] )) ||
_perforce_statuses() {
  # Perforce statuses are usually limited to a set of values
  # given by the jobspec.
  local jline match mbegin mend
  local -a statuses

  _perforce_call_p4 jobspec jobspec -o | while read jline; do
    if [[ $jline = (#b)Status[[:blank:]]##(*/*) ]]; then
      statuses=(${(s./.)match[1]})
      break
    fi
  done
  if (( !${#statuses} )); then
    # Couldn't find anything from the jobspec; add defaults.
    statuses=(closed open suspended)
  fi
  _describe -t statuses 'job status' statuses
}


(( $+functions[_perforce_submit_options] )) ||
_perforce_submit_options() {
  local -a soptions
  soptions=('submitunchanged:submit all open files (default)'
	    'revertunchanged:revert unchanged files'
	    'leaveunchanged:move unchanged files to default changelist')
  soptions+=(${^${soptions//:/+reopen:}}", leave submitted open")
  _describe -t submit-options 'submit option' soptions
}


(( $+functions[_perforce_pids] )) ||
_perforce_pids() {
  local -a ul

  ul=(${${${(f)"$(_perforce_call_p4 monitor monitor show 2>/dev/null)"}# *}/\ /:})
  [[ $#ul -eq 1 && $ul[1] = '' ]] && ul=()
  _describe -t id 'process ID' ul
}


(( $+functions[_perforce_users] )) ||
_perforce_users() {
  local -a ul

  ul=(${${(f)"$(_perforce_call_p4 users users)"}/\ /:})
  [[ $#ul -eq 1 && $ul[1] = '' ]] && ul=()
  _describe -t users 'Perforce user' ul
}


(( $+functions[_perforce_users_or_groups] )) ||
_perforce_users_or_groups() {
    _alternative 'groups:Perforce group:_perforce_groups' \
      'users:Perforce user:_perforce_users'
}

(( $+functions[_perforce_variables] )) ||
_perforce_variables() {
  local line match mbegin mend expl
  local -a vars

  _perforce_call_p4 help-environment help environment | while IFS= read line
  do
    if [[ $line = $'\t'(#b)([A-Z][A-Z0-9_]##)* ]]; then
      vars+=($match[1])
    fi
  done

  _wanted variable expl 'environment variable' compadd -S= -q $vars
}

#
# Completions for p4 commands
#

(( $+functions[_perforce_cmd_add] )) ||
_perforce_cmd_add() {
  _arguments -s : \
    '-c+[select by change]:change:_perforce_changes -tc' \
    '-d[reopen removed file for add (downgrade)]' \
    '-f[allow filenames with wild cards]' \
    '-n[display operation without doing it]' \
    '-t+[set file type]:file type:_perforce_filetypes' \
    '*:file:_perforce_files -tu'
}


(( $+functions[_perforce_cmd_admin] )) ||
_perforce_cmd_admin() {
  if (( CURRENT == 2 )); then
    local -a adcmds
    adcmds=(
      "checkpoint:checkpoint, save copy of journal file"
      "dbstat:db tables"
      "journal:save and truncate journal file"
      "logstat:report sizes of log files"
      "stop:stop the server")
    _describe -t commands 'Perforce admin command' adcmds
  else
    case $words[2] in
      (checkpoint|journal)
      shift words
      (( CURRENT-- ))
      _arguments -s : \
	'-z[gzip journal file]' \
	'1::journal file prefix: '
      ;;

      (dbstat)
      shift words
      (( CURRENT -- ))
      _arguments -s : \
	'-s[show sizes]'
    esac
  fi
}


(( $+functions[_perforce_cmd_annotate] )) ||
_perforce_cmd_annotate() {
  # New in release 2002.2.
  # -c was new in about 2003.2.
  _arguments -s : \
    '-a[all, show both added and deleted lines]' \
    '-c[output change numbers instead of revisions]' \
    '-i[follow branches (integration records)]' \
    '-q[quiet, suppress one-line file header]' \
    '*::file:_perforce_files -tR'
}


(( $+functions[_perforce_cmd_attribute] )) ||
_perforce_cmd_attribute() {
  # This is currently (2005.1) an unsupported command.
  # See "p4 help undoc".
  local limit
  # If -f is present, search unopened files, else don't
  [[ ${words[(I)-f]} -eq 0 ]] && limit=" -to"
  _arguments -s : \
    '-e[value is in hex]' \
    '-f[set the attribute on a submitted file]' \
    '-n[set name of attribute]:attribute: ' \
    '-p[propagate attribute when opened for edit etc.]' \
    '-v[set value of attribute]:value: ' \
    "*::file:_perforce_files$limit"
}


(( $+functions[_perforce_cmd_branch] )) ||
_perforce_cmd_branch() {
  _arguments -s : \
    '(-o)-f[force operation by superuser]' \
    '(-o -i)-d[delete branch]' \
    '(-d -i -f)-o[write specification to standard output]' \
    '(-d -o)-i[read specification from standard input]' \
    '(-i)*::branch name:_perforce_branches'
}


(( $+functions[_perforce_cmd_branches] )) ||
_perforce_cmd_branches() {
  _arguments -s : \
    '-e[limit by wildcard]:wildcard on branches: ' \
    '-u+[select by user]:user:_perforce_users' \
    '-m+[set maximum to show]:max branches: '
}


(( $+functions[_perforce_cmd_change] )) ||
_perforce_cmd_change() {
  local ctype
  # Unless forcing or outputting, we don't
  # complete committed changes since they can't be altered.
  # If deleting and not forcing, the change must be on the current client.
  if [[ ${words[(I)-*(f|o)*]} -eq 0 ]]; then
    if [[ ${words[(I)-d]} -gt 0 ]]; then
      ctype=" -tc"
    else
      ctype=" -tp"
    fi
  fi
  _arguments -s : \
    '(-o)-f[allow force by superuser]' \
    '-s[joblist includes the fix status]' \
    '(-o -i)-d[discard newly created pending change]' \
    '(-d -i -f)-o[output specification to standard output]' \
    '(-d -o)-i[read specification from standard input]' \
    '(-d -o)-u[force change of jobs or description by owner]' \
    "(-i)1::change:_perforce_changes$ctype"
}


(( $+functions[_perforce_cmd_changelist] )) ||
_perforce_cmd_changelist() {
  _perforce_cmd_change "$@"
}


(( $+functions[_perforce_cmd_changes] )) ||
_perforce_cmd_changes() {
  _arguments -s : \
    '-i[include integrated changes]' \
    '-t[output time as well as date]' \
    '-l[long output, full change text]' \
    '-L[long output, truncated change text]' \
    '-c+[select by client]:client:_perforce_clients' \
    '-m+[most recent N changes]:max changes: ' \
    '-s+[select by status]:status:(pending shelved submitted)' \
    '-u+[select by user]:user:_perforce_users' \
    '*::file:_perforce_files -tR'
}


(( $+functions[_perforce_cmd_changelists] )) ||
_perforce_cmd_changelists() {
  _perforce_cmd_changes "$@"
}


(( $+functions[_perforce_cmd_client] )) ||
_perforce_cmd_client() {
  _arguments -s : \
    '(-o)-f[force modification by superuser]' \
    '-t[use template]:template client:_perforce_clients' \
    '(-o -i -t)-d[delete client]' \
    '(-d -i -f)-o[print to standard output]' \
    '(-d -o -t)-i[read from standard input]' \
    '1::file:_perforce_clients'
}


(( $+functions[_perforce_cmd_clients] )) ||
_perforce_cmd_clients() {
  _arguments -s : \
    '-e[limit by wildcard]:wildcard on clients: ' \
    '-u+[select by user]:user:_perforce_users' \
    '-m+[set maximum to show]:max clients: '
}


(( $+functions[_perforce_cmd_counter] )) ||
_perforce_cmd_counter() {
  _arguments -s : \
    '-d[delete counter]' \
    '-f[force setting of internal counter]' \
    '-i[increment by one atomically]' \
    '1:counter:_perforce_counters' \
    '(-d -i)2::numeric value:_perforce_counter_values'
}


(( $+functions[_perforce_cmd_counters] )) ||
_perforce_cmd_counters() {
  # No arguments
  _arguments -s :
}


(( $+functions[_perforce_cmd_cstat] )) ||
_perforce_cmd_cstat() {
  _arguments -s : \
  '*::file:_perforce_files'
}


(( $+functions[_perforce_cmd_dbschema] )) ||
_perforce_cmd_dbschema() {
  if [[ $PREFIX = *:* ]]; then
    _message 'table version'
  else
    _perforce_dbtables
  fi
}


(( $+functions[_perforce_cmd_dbstat] )) ||
_perforce_cmd_dbstat() {
  _arguments -s : \
  '(-s)-h[histogram of leaf pages in DB table]' \
  '(-s)-a[all tables]' \
  '(-h -a)-s[report sizes of tables]' \
  '(-s -a)*::DB table:_perforce_dbtable'
}


(( $+functions[_perforce_cmd_delete] )) ||
_perforce_cmd_delete() {
  _arguments -s : \
    '-c[select change for deletion]:change:_perforce_changes -tc' \
    '-n[show deletions without doing them]' \
    '*::file:_perforce_files'
}


(( $+functions[_perforce_cmd_depot] )) ||
_perforce_cmd_depot() {
  _arguments -s : \
    '-d[delete depot]' \
    '-o[print to stdout]' \
    '-i[read name from stdin]' \
    '(-i)*::depot name:_perforce_depots'
}


(( $+functions[_perforce_cmd_depots] )) ||
_perforce_cmd_depots() {
  # No arguments
  _arguments -s :
}


(( $+functions[_perforce_cmd_describe] )) ||
_perforce_cmd_describe() {
  _arguments -s : \
    '-d-[select diff option]:diff option:((b\:ignore\ blanks c\:context n\:RCS s\:summary u\:unified w\:ignore\ all\ whitespace))' \
    '-s[short form]' \
    '-S[show shelved changes]' \
    '*::change:_perforce_changes'
}


(( $+functions[_perforce_cmd_diff] )) ||
_perforce_cmd_diff() {
  local limit
  [[ ${words[(I)-(f|sd|se)]} -eq 0 ]] && limit=" -to"
  _arguments -s : \
    '-d-[select diff option]:diff option:((b\:ignore\ blanks c\:context l\:ignore\ line\ endings n\:RCS s\:summary u\:unified w\:ignore\ all\ whitespace))' \
    '-f[diff every file]' \
    '-m+[set maximum files to show]:max files: ' \
    '(-sd -se -sl -sr)-sa[opened files, different or missing]' \
    '(-sa -se -sl -sr)-sd[unopened files, missing]' \
    '(-sa -sd -sl -sr)-se[unopened files, different]' \
    '(-sa -sd -se -sr)-sl[all unopened files with status]' \
    '(-sa -sd -se -sl)-sr[opened files, same as depot]' \
    '-t[include non-text files]' \
    "*::file:_perforce_files$limit"
}


(( $+functions[_perforce_cmd_diff2] )) ||
_perforce_cmd_diff2() {
  _arguments -s : \
    '-b[specify branch view]:branch name:_perforce_branches' \
    '-d-[select diff option]:diff option:((b\:ignore\ blanks c\:context n\:RCS s\:summary u\:unified w\:ignore\ all\ whitespace))' \
    '-q[only list different files]' \
    '-t[include non-text files]' \
    '-u[use patch-friendly output]' \
    '1::first file:_perforce_files' \
    '2::second file:_perforce_files'
}


(( $+functions[_perforce_cmd_dirs] )) ||
_perforce_cmd_dirs() {
  _arguments -s : \
    '-C[only dirs on current client]' \
    '-D[include dirs with deleted files]' \
    '-H[only dirs on the `have'\'' list]' \
    '*::directory:_perforce_files -td'
}


(( $+functions[_perforce_cmd_edit] )) ||
_perforce_cmd_edit() {
  _arguments -s : \
    '-c[set change for edit]:change:_perforce_changes -tc' \
    '-k[no resync from server]' \
    '-n[show files to edit without opening them]' \
    '-t[set filetype]:filetype:_perforce_filetypes' \
    '*::file:_perforce_files'
}


(( $+functions[_perforce_cmd_export] )) ||
_perforce_cmd_export() {
  _arguments -s : \
    '(-j)-c[specify checkpoint number (/ position)]:checkpoint number: ' \
    '(-c)-j[specify journal number (/ position)]:journal number: ' \
    '(-j)-f[reformat non-textual data types]' \
    '(-j)-l[specify number of lines]:number of lines: ' \
    '(-j)-F[specify filter]:filter pattern: ' \
    '(-c)-r[raw format]' \
    '-J[specify file prefix]:file prefix: '
}


(( $+functions[_perforce_cmd_filelog] )) ||
_perforce_cmd_filelog() {
  _arguments -s : \
    '-c[select by changelist]:change:_perforce_changes -ts' \
    '-h[follow branc/copy from records]' \
    '-i[follow branches]' \
    '-l[long output, full change text]' \
    '-L[long output, truncated change text]' \
    '-m[set maximum number of revisions to show]:max revisions: ' \
    '-s[short output]' \
    '-t[include time with date]' \
    '*::file:_perforce_files'
}


(( $+functions[_perforce_cmd_files] )) ||
_perforce_cmd_files() {
  _arguments -s : \
    '-a[display all revisions in given range]' \
    '*::file:_perforce_files -tR'
}


(( $+functions[_perforce_cmd_fix] )) ||
_perforce_cmd_fix() {
  local job
  local -a jobs

  if [[ -n $words[(R)-d] && -n $words[(R)-c] && -n $words[$words[(i)-c]+1] ]]
  then
    # Deleting a fix from a change.  We can find out which fixes
    # are present.
    local -a jobs
    jobs=(${${(f)"$(_perforce_call_p4 fixes fixes -c $words[$words[(i)-c]+1])"}%" fixed by change "*})
    if (( ${#jobs} )); then
      jobs=("Job="${^jobs})
      job=" -e \"${(j.|.)jobs}\""
    fi
  fi

  _arguments -s : \
    '-d[delete the fix]' \
    '-s[set job status]:status:_perforce_statuses' \
    '1::-c required:(-c)' \
    '2::change:_perforce_changes' \
    "3::job:_perforce_jobs$job"
}


(( $+functions[_perforce_cmd_fixes] )) ||
_perforce_cmd_fixes() {
  _arguments -s : \
    '-i[include integrated changes]' \
    '-j[select by job]:job:_perforce_jobs' \
    '-c[select by change]:change:_perforce_changes' \
    '-m[set max fixes to show]:max fixes: ' \
    '*::fixed file:_perforce_files -tR'
}


(( $+functions[_perforce_cmd_flush] )) ||
_perforce_cmd_flush() {
  _arguments -s : \
    '-f[force resynchronisation]' \
    '-k[bypass client file update]' \
    '-n[show operations but don'\''t perform them]' \
    '*::file:_perforce_files -tR'
}


(( $+functions[_perforce_cmd_fstat] )) ||
_perforce_cmd_fstat() {
  local Oattr Aattr
  if [[ ${_perforce_cmd_list[(r)attribute:*]} != '' ]]; then
    # Unsupported feature, try not to show if not present
    Oattr=' a\:show\ attributes d\:attributes\ digest e\:attributes\ in\ hex'
    Aattr='-A[restrict attributes by pattern]:attribute pattern: '
  fi
  _arguments -s : \
    '-c+[affected since change]:change:_perforce_changes -ts' \
    '-e+[affected by change]:change:_perforce_changes -ts' \
    '-C[select mapped files (-Rc)]' \
    '-F[pick filter for files]:filter:_perforce_fstat_fields -tv' \
    '-H[select synced files (-Rh)]' \
    '-W[select opened files (-Ro)]' \
    '-l[include fileSize, possibly slow (-Ol)]' \
    '-m[set max files to show]:max files: ' \
    "-O-[select output type]:output type:((f\:all\ revisions l\:fileSize p\:client\ path\ format r\:pending\ integrations s\:exclude\ local\ path$Oattr))" \
    '-P[output clientFile in full Perforce syntax (deprecated: use -Op)]' \
    '-r[show in reverse order]' \
    '-R-[restrict selected files]:restriction:((c\:mapped\ in\ client h\:synced\ to\ client n\:not\ synced\ to\ head o\:opened r\:resolved s\:shelved u\:unresolved))' \
    '-s[shorten, no client-related data (deprecated: use -Os)]' \
    '-S-[changes sort order]:sort criterion:((t\:filetype d\:date r\:head\ revision h\:have\ revision s\:filesize))' \
    '-T[select output fields]:output field:_perforce_fstat_fields' \
    $Aattr \
    '*::file:_perforce_files'
}


(( $+functions[_perforce_cmd_grep] )) ||
_perforce_cmd_grep() {
  _arguments -s : \
    '-a[search all revisions]' \
    '-i[case insensitive match]' \
    '-n[display matching line]' \
    '-v[display file name]' \
    '-F[interpret as fixed string]' \
    '-G[interpret as regexp (default)]' \
    '-L[list non-matching file/revisions]' \
    '-l[list matching file/revisions]' \
    '-s[suppresses errors on long lines]' \
    '-t[treat all files as text]' \
    '-A[]:trailing context lines: ' \
    '-V[]:leading context lines: ' \
    '-C[]:context lines: ' \
    '1:-e required before pattern:(-e)' \
    '2:pattern: ' \
    '*::file:_perforce_files'
}


(( $+functions[_perforce_cmd_group] )) ||
_perforce_cmd_group() {
  _arguments -s : \
    '-d[delete group]' \
    '-o[output to stdout]' \
    '-i[read from stdin]' \
    '(-o)-a[allow non-super owner to modify group]' \
    '1::perforce group:_perforce_groups'
}


(( $+functions[_perforce_cmd_groups] )) ||
_perforce_cmd_groups() {
  _arguments -s : \
    '-i[show indirect membership by subgroups]' \
    '-m[set max groups to show]:max groups: ' \
    '-v[show summary data]' \
    '1::user or group name:_perforce_users_or_groups'
}


(( $+functions[_perforce_cmd_have] )) ||
_perforce_cmd_have() {
  _perforce_files
}


(( $+functions[_perforce_cmd_help] )) ||
_perforce_cmd_help() {
  local hline
  if (( ! ${#_perforce_help_list} )); then
    (( ${+_perforce_help_list} )) || typeset -ga _perforce_help_list
    # All commands have help.
    (( ${#_perforce_cmd_list} )) || _perforce_gen_cmd_list
    _perforce_help_list=($_perforce_cmd_list)
    _perforce_call_p4 help help | while read -A hline; do
      if [[ $hline[1] = p4 && $hline[2] = help ]]; then
	_perforce_help_list+=("$hline[3]:${hline[4,-1]}")
      fi
    done
    if [[ -z ${_perforce_help_list[(r)undoc:*]} ]]; then
      _perforce_help_list+=("undoc:help for otherwise undocumented features")
    fi
  fi
  _describe -t help-options 'Perforce help option' _perforce_help_list
}


(( $+functions[_perforce_cmd_info] )) ||
_perforce_cmd_info() {
  # No arguments
  _arguments -s :
}


(( $+functions[_perforce_cmd_integrate] )) ||
_perforce_cmd_integrate() {
  local range
  # If -s is present, the first normal argument can't have revRange.
  [[ ${words[(I)-s]} -eq 0 ]] && range=" -tR"
  _arguments -s : \
    '-b[select branch]:branch:_perforce_branches' \
    '-c[select change for integration]:change:_perforce_changes -tc' \
    '-f[force reintegration]' \
    '-d[reintegrate deleted files]' \
    '-D-[specify allowed deletions]:deletion type:((
t\:rebranch\ on\ deleted\ file
s\:delete\ modified\ target\ file
i\:ignore\ readded\ source\ file
))' \
    '-h[integrate to revision had on client]' \
    '-i[integrate if no common file base]' \
    '-I[same as -i from 2004.2]' \
    '-n[no action, dummy run]' \
    '-o[display base file name for subsequent resolve]' \
    '-r[reverse direction of integration with branch]' \
    '-s[select source with -b]:source file:_perforce_files -tR' \
    '-t[propagate type changes]' \
    '-v[leave newly branched files uncopied till sync]' \
    "1:file:_perforce_files$range" \
    '*::file:_perforce_files'
}


(( $+functions[_perforce_cmd_integ] )) ||
_perforce_cmd_integ() {
  _perforce_cmd_integrate "$@"
}

(( $+functions[_perforce_cmd_integrated] )) ||
_perforce_cmd_integrated() {
  _arguments -s : \
    '-r[reverse mapping in branch view with -b]' \
    '-b[select files integrated via branch]:branch:_perforce_branches' \
    '*::file:_perforce_files -ti'
}


# interchanges is an unsupported but useful command that reports
# changes that haven't been integrated between source and target;
# see "p4 help undoc".
(( $+functions[_perforce_cmd_interchanges] )) ||
_perforce_cmd_interchanges() {
  local -a fileargs
  if [[ ${words[(I)-b*]} -ne 0 ]]; then
    if [[ ${words[(I)-*s*]} -eq 0 ]]; then
      # with -b and no -s, all files are to-files (but -s may come later)
      fileargs=('-s[specify source file]'
	        '*::to file:_perforce_files -tR')
    else
      # with -b and -s we have one from-file and any number of to-files
      fileargs=('1::from file:_perforce_files -tR'
	        '*::to file:_perforce_files')
    fi
  else
    # with no -b we have one from-file and one to-file
    fileargs=('1::from file:_perforce_files -tR'
              '2::to file:_perforce_files')
  fi
  _arguments -s : \
    '-f[show individual files]' \
    '-l[long changelist description]' \
    '-b[select files integrated via branch]:branch:_perforce_branches' \
    '-r[reverse branch mapping]' \
    $fileargs
}


(( $+functions[_perforce_cmd_job] )) ||
_perforce_cmd_job() {
  _arguments -s : \
    '(-d -o -i)-f[force setting of readonly fields]' \
    '(-f -o -i)-d[delete job]' \
    '(-f -d -i)-o[print to stdout]' \
    '(-d -o)-i[read from stdin]' \
    '(-i)1::job:_perforce_jobs'
}


(( $+functions[_perforce_cmd_jobs] )) ||
_perforce_cmd_jobs() {
  _arguments -s : \
    '-e[select by jobview]:jobview:_perforce_jobviews' \
    '-i[included integrated changes]' \
    '-l[long output, full job descriptions]' \
    '-r[reverse order of job names]' \
    '-m[limit to most recent N jobs]:number of most recent jobs: ' \
    '(-e -i -l -m)-R[rebuild jobs table on upgrade]' \
    '*::file:_perforce_files -tR'
}


(( $+functions[_perforce_cmd_jobspec] )) ||
_perforce_cmd_jobspec() {
  _arguments -s : \
    '-i[read form from stdin]' \
    '-o[write form from to stdout]'
}


(( $+functions[_perforce_cmd_label] )) ||
_perforce_cmd_label() {
  _arguments -s : \
    '-f[force operation]' \
    '-t+[copy template]:template: ' \
    '(-o -i -t)-d[delete label]' \
    '(-d -f -i)-o[write to standard output]' \
    '(-o -d -t)-i[read from standard input]' \
    '*::label:_perforce_labels'
}


(( $+functions[_perforce_cmd_labels] )) ||
_perforce_cmd_labels() {
  _arguments -s : \
    '-e[limit by wildcard]:label wildcard: ' \
    '-m+[set maximum to show]:max labels: ' \
    '-t[output time as well as date]' \
    '-u+[select by user]:user:_perforce_users' \
    '1::file or revisions which must contain label:_perforce_files -tR'
}


(( $+functions[_perforce_cmd_labelsync] )) ||
_perforce_cmd_labelsync() {
  _arguments -s : \
    '-a[add files to label]' \
    '-d[delete files from label]' \
    '-n[no effect, dummy run]' \
    '-l[specify label]:label:_perforce_labels' \
    '*::file:_perforce_files -tR'
}


(( $+functions[_perforce_cmd_license] )) ||
_perforce_cmd_license() {
  _arguments -s : \
    '-o[write license to stdout]' \
    '-i[read license from stdin]'
}


(( $+functions[_perforce_cmd_lock] )) ||
_perforce_cmd_lock() {
  _arguments -s : \
    '-c[select by change]:change:_perforce_changes -tc' \
    '*::file:_perforce_files -to'
}


(( $+functions[_perforce_cmd_lockstat] )) ||
_perforce_cmd_lockstat() {
  _message 'no arguments'
}


(( $+functions[_perforce_cmd_logger] )) ||
_perforce_cmd_logger() {
  _arguments -s : \
    '-c[limit by counter no]:number: ' \
    '-t[use counter instead of logger]:counter:_perforce_counters'
}



(( $+functions[_perforce_cmd_login] )) ||
_perforce_cmd_login() {
  _arguments -s : \
    '-a[ticket valid on all machines]' \
    '-p[display ticket, do not store]' \
    '-s[show status of ticket]' \
    '(-s)1::user:_perforce_users'
}


(( $+functions[_perforce_cmd_logout] )) ||
_perforce_cmd_logout() {
  _arguments -s : \
    '-a[invalidate ticket on server]'
}


(( $+functions[_perforce_cmd_logstat] )) ||
_perforce_cmd_logstat() {
  _message 'no arguments'
}


(( $+functions[_perforce_cmd_logtail] )) ||
_perforce_cmd_logtail() {
  _arguments -s : \
    '-b[specify block size, default 8192]:block size: ' \
    '-s[specify start offset]:offset: ' \
    '-m[specify max blocks]:max blocks: '
}


(( $+functions[_perforce_cmd_monitor] )) ||
_perforce_cmd_monitor() {
  if (( CURRENT > 2 )); then
    case $words[2] in
      (show)
      shift words
      (( CURRENT-- ))
      _arguments -s : \
        '-a[show command arguments]' \
        '-e[show command environment]' \
        '-l[long output format]'
      ;;

      (terminate)
      _perforce_pids
      ;;

      (clear)
      _alternative 'pids:pid:_perforce_pids' 'all:all processes:(all)'
      ;;

      (*)
      _message "no such monitor command: $words[1]"
      ;;
    esac
  else
    local expl
    _wanted monitor-command expl 'monitor command' compadd show terminate clear
  fi
}


(( $+functions[_perforce_cmd_move] )) ||
_perforce_cmd_move() {
  _arguments -s : \
    '-c[specify new change list]:change:_perforce_changes -tc' \
    '-f[force move when already synced]' \
    '-k[no resync from server]' \
    '-t[specify new file type]:filetype:_perforce_filetypes' \
    '-n[show files to move without moving them]' \
    '1::source file, wildcards allowed:_perforce_files -to' \
    '2::destination file, wildcards match source:_perforce_files'
}


(( $+functions[_perforce_cmd_obliterate] )) ||
_perforce_cmd_obliterate() {
    if [[ ${words[(I)-y]} -gt 0 ]]; then
	_message \
": don't complete after -y; run obliterate without, then add the -y"
    else
	_arguments -s : \
	    '-y[actually perform the operation]' \
	    '*::file:_perforce_files -tR'
    fi
}


(( $+functions[_perforce_cmd_opened] )) ||
_perforce_cmd_opened() {
  # You might think you could check for files opened on another
  # client, and hence the -c completion should have the argument
  # -tp, but currently Perforce doesn't allow that, so -tc is correct.
  # This is true even if -a is also given.
  _arguments -s : \
    '-a[list for all clients]' \
    '-c+[select by change]:change:_perforce_changes -tc' \
    '-C[select by client]:client:_perforce_clients' \
    '-m[max files to show]:max files: ' \
    '-u[select by user]:user name:_perforce_users' \
    '*::file:_perforce_files -to'
}


(( $+functions[_perforce_cmd_passwd] )) ||
_perforce_cmd_passwd() {
  _arguments -s : \
    '-O[explicit old password]:old password: ' \
    '-P[explicit new password]:new password: ' \
    '1::user name:_perforce_users'
}


(( $+functions[_perforce_cmd_print] )) ||
_perforce_cmd_print() {
  _arguments -s : \
    '-a[display all revisions in a range]' \
    '-o[select output file]:output file:_files' \
    '-q[suppress header]' \
    '*::file:_perforce_files -tR'
}


(( $+functions[_perforce_cmd_protect] )) ||
_perforce_cmd_protect() {
  _arguments -s : \
    '-o[write spec to stdout]' \
    '-i[read spec from stdin]'
}


(( $+functions[_perforce_cmd_protects] )) ||
_perforce_cmd_protects() {
  _arguments -s : \
    '(-g -u)-a[show for all users]' \
    '(-a -u)-g[select by group]:perforce group:_perforce_groups' \
    '(-a -g)-u[select by user]:perforce user:_perforce_users' \
    '-h[limit to host]:host:_perforce_hosts' \
    '-m[single word summary]' \
    '*:file:_perforce_files'
}


(( $+functions[_perforce_cmd_reopen] )) ||
_perforce_cmd_reopen() {
  _arguments -s : \
    '-c+[select change to reopen on]:change:_perforce_changes -tc' \
    '-t+[set file type]:file type:_perforce_filetypes' \
    '*::file:_perforce_files -to'
}


(( $+functions[_perforce_cmd_replicate] )) ||
_perforce_cmd_replicate() {
  _arguments -s : \
    '-i[specify interval in seconds]:interval: ' \
    '-j[specify journal number (/ position)]:journal number: ' \
    '-J[specify file prefix]:file prefix: ' \
    '-k[keep pipe open]' \
    '-o[specify output file]:output file:_files' \
    '-s[specify file to track state]:state file:_files' \
    '-x[terminate when journal rotates]' \
    '*::->_command'
}


(( $+functions[_perforce_cmd_resolve] )) ||
_perforce_cmd_resolve() {
  _arguments -s : \
    '-a-[select automatic merge type]:automation type:((f\:force\ acceptance m\:skip\ conflicts s\:safe t\:use\ theirs y\:use\ yours))' \
    '-d-[select diff option]:diff option:((b\:ignore\ blanks w\:ignore\ all\ whitespace))' \
    '-f[force re-resolution]' \
    '-n[no action, just list]' \
    '-o[display base file name and revision for merge]' \
    '-t[force textual merge on binary files]' \
    '-v[verbose, mark all changes]' \
    '*::file:_perforce_files -to'
}


(( $+functions[_perforce_cmd_resolved] )) ||
_perforce_cmd_resolved() {
  _arguments -s : \
    '-o[report revision used as base for resolve]' \
    '*::file:_perforce_files -tr'
}


(( $+functions[_perforce_cmd_revert] )) ||
_perforce_cmd_revert() {
  _arguments -s : \
    '-a[revert unaltered files]' \
    '-c[limit reversions to change]:change:_perforce_changes -tc' \
    '-k[bypass client refresh]' \
    '-n[no action, show effect only]' \
    '*::file:_perforce_files -to'
}


(( $+functions[_perforce_cmd_review] )) ||
_perforce_cmd_review() {
  _arguments -s : \
    '-c[select change for counter]:change:_perforce_changes -ts' \
    '-t[limit change number by counter]:counter:_perforce_counters'
}


(( $+functions[_perforce_cmd_reviews] )) ||
_perforce_cmd_reviews() {
  _arguments -s : \
    '-c[show users by change]:change:_perforce_changes -ts' \
    '*::file:_perforce_files'
}


(( $+functions[_perforce_cmd_set] )) ||
_perforce_cmd_set() {
  # Only works under Windoze but maybe we are on Cygwin.
  _arguments -s : \
    '-s[set for whole system]' \
    '-S[set for specified service]:service: ' \
    "*::environment variable:_perforce_variables"
}


(( $+functions[_perforce_cmd_shelve] )) ||
_perforce_cmd_shelve() {
  _arguments -s : \
    '(-i)-c[specify changlist if not default]:change:_perforce_changes -tc' \
    '(-i -r)-d[delete shelved files]' \
    '(-r)-f[force by admin user or force to overwrite]' \
    '(-c)-i[read from standard input]' \
    '(-d)-r[replace shelved files in changelist]' \
    '(-i -r)*::file:_perforce_files -to'
}


(( $+functions[_perforce_cmd_sizes] )) ||
_perforce_cmd_sizes() {
  _arguments -s : \
    '-a[show for all revisions]' \
    '-b[set blocksize]:blocksize in bytes: ' \
    '-s[sum the file sizes]' \
    '-S[show sizes of shelved files]' \
    '*:file:_perforce_files -tR'
}


(( $+functions[_perforce_cmd_spec] )) ||
_perforce_cmd_spec() {
  _arguments -s : \
    '-d[delete a custom spec]' \
    '-i[read spec from stdin]' \
    '-o[write spec to stdout]' \
    "*::spec type:(branch change client depot group job
label spec trigger typemap user)"
}


(( $+functions[_perforce_cmd_submit] )) ||
_perforce_cmd_submit() {
  _arguments -s : \
    '-r[files open for add or edit remain open]' \
    '-s[include fix status in list]' \
    '-f[override submit option]:submit option:_perforce_submit_options' \
    '(-s -i)-c[submit specific change]:change:_perforce_changes -tc' \
    '(-s -c)-d[specify description on command line]:description: ' \
    '(-c)-i[read change spec from stdin]' \
    '*::file:_perforce_files -to -tr'
}


(( $+functions[_perforce_cmd_sync] )) ||
_perforce_cmd_sync() {
  _arguments -s : \
    '-f[force resynchronisation]' \
    '-n[show operations but don'\''t perform them]' \
    '-k[bypass client file update]' \
    '*::file:_perforce_files -tR'
}


(( $+functions[_perforce_cmd_tag] )) ||
_perforce_cmd_tag() {
  _arguments -s : \
    '-d[delete association between label and files]' \
    '-n[show what files would be tagged]' \
    '-l[specify label]:label:_perforce_labels' \
    '*::file:_perforce_files -tR'
}


(( $+functions[_perforce_cmd_tickets] )) ||
_perforce_cmd_tickets() {
  # No arguments.
  _arguments -s :
}


(( $+functions[_perforce_cmd_triggers] )) ||
_perforce_cmd_triggers() {
  _arguments -s : \
    '-o[output form to stdout]' \
    '-i[read from from stdin]'
}


(( $+functions[_perforce_cmd_typemap] )) ||
_perforce_cmd_typemap() {
  _arguments -s : \
    '-o[output table to stdout]' \
    '-i[read table from stdin]'
}


(( $+functions[_perforce_cmd_unlock] )) ||
_perforce_cmd_unlock() {
  _arguments -s : \
    '-c[non-default change to unlock]:change:_perforce_changes -tc' \
    '-f[allow superuser to unlock any file]' \
    '*::file:_perforce_files'
}


(( $+functions[_perforce_cmd_unshelve] )) ||
_perforce_cmd_unshelve() {
  _arguments -s : \
    '-s[specify shelving change]:change:_perforce_changes -tS' \
    '-c[specify change for unshelve]:change:_perforce_changes -tc' \
    '-f[force clobbering of writeable files]' \
    '-n[preview unshelve]' \
    '*::file, pattern allowed:_perforce_files'
}


(( $+functions[_perforce_cmd_user] )) ||
_perforce_cmd_user() {
  _arguments -s : \
    '(-o)-f[force edit by superuser]' \
    '(-o -i)-d[delete user]' \
    '(-o -d)-i[read form from stdin]' \
    '(-f -i -d)-o[write form to stdout]' \
    '(-i)1::username:_perforce_users'
}


(( $+functions[_perforce_cmd_users] )) ||
_perforce_cmd_users() {
  _arguments -s : \
    '-m[set max users to show]:max users: ' \
    '*::username:_perforce_users'
}


(( $+functions[_perforce_cmd_verify] )) ||
_perforce_cmd_verify() {
  _arguments -s : \
    '-m[limit revisions]:max revisions: ' \
    '-q[operate quietly]' \
    '-u[compute and save digest if missing]' \
    '-v[compute and save all digets]' \
    '-z[skip duplicates]' \
    '*::file:_perforce_files -tR'
}


(( $+functions[_perforce_cmd_where] )) ||
_perforce_cmd_where() {
  _perforce_files
}


(( $+functions[_perforce_cmd_workspace] )) ||
_perforce_cmd_workspace() {
  _perforce_cmd_client "$@"
}


(( $+functions[_perforce_cmd_workspaces] )) ||
_perforce_cmd_workspaces() {
  _perforce_cmd_clients "$@"
}


_perforce "$@"

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