#compdef cvs

# redefine _cvs.

_cvs() {
  # "+Qqrwtnlvb:T:e:d:Hfz:s:xa"
  _arguments -s \
    '-R[read only access]' \
    '-a[authenticate]' \
    '-f[disable .cvsrc]' \
    '(-n)-l[disable logging]' \
    '(-l)-n[no change]' \
    '(-q)-Q[really quiet]' \
    '(-Q)-q[somewhat quiet]' \
    '(-w)-r[make new working file read only]' \
    '-t[trace]' \
    '(-r)-w[make new working file read-write]' \
    '-x[encrypt client/server communication]' \
    '(-)'{-v,--version}'[print version and copyright information]' \
    '(-)'{-H,--help}'[print help information]' \
    '(-)--help-commands[command help]' \
    '(-)--help-synonyms[command synonyms help]' \
    '(-)--help-options[global options help]' \
    '*--allow-root=[allowable root for pserver]:rootdir:_files -/' \
    '-T+[temporary directory]:temporary directory:_cvs_tempdir' \
    '-d+[cvs root directory]:cvsroot:_cvs_root' \
    '-e+[editor]:editor:_cvs_editor' \
    '-s+[user variable]:user variable:_cvs_user_variable' \
    '-z+[gzip level]:gzip level:(0 1 2 3 4 5 6 7 8 9)' \
    '*::cvs command:_cvs_command'
}

# define cvs command dispatch function.

(( $+functions[_cvs_command] )) ||
_cvs_command() {
  local cmd cvsroot="$CVSROOT" ret=1
  [[ -f CVS/Root ]] && cvsroot="$(<CVS/Root)"
  [[ -n "$opt_args[-d]" ]] && cvsroot=${(e)~opt_args[-d]:Q}

  if (( ! $+_cvs_syns )); then
    typeset -gA _cvs_syns
    _cvs_syns=( ${(s. .)${(f)"$(cvs --help-synonyms 2>&1)"}[2,-2]/(#b) #([a-z]#)   #([a-z]#) ([a-z]#)/$match[1] $match[2]:$match[3]} )
  fi

  (( $+_cvs_cmds )) || _cvs_cmds=(
    ${${(f)"$(_call_program commands cvs --help-commands 2>&1)"}[2,-2]/(#b) #([a-z]##) #([A-Z])/$match[1]:${match[2]:l}}
  )

  if (( CURRENT == 1 )); then
    _describe -t commands 'cvs command' _cvs_cmds || compadd "$@" - ${(s.:.)${(j.:.)_cvs_syns}}
  else
    local curcontext="$curcontext"

    cmd="${${_cvs_cmds[(r)$words[1]:*]%%:*}:-${(k)_cvs_syns[(r)(*:|)$words[1](:*|)]}}"
    if (( $#cmd )); then
      curcontext="${curcontext%:*:*}:cvs-${cmd}:"
      _call_function ret _cvs_$cmd || _message 'no more arguments'
    else
      _message "unknown cvs command: $words[1]"
    fi
    return ret
  fi
}

# define completion functions for each cvs command

(( $+functions[_cvs_add] )) ||
_cvs_add() {
  # "+k:m:"
  _arguments -s \
    '-k+[keyword]:keyword substitution:_cvs_k' \
    '-m+[message]:message:_cvs_m' \
    '*:added file:_cvs_files_unmaintained' \
}

(( $+functions[_cvs_admin] )) ||
_cvs_admin() {
  # "+ib::c:a:A:e::l::u::LUn:N:m:o:s:t::IqxV:k:"
  _arguments -s \
    -{i,x} \
    '(-U)-L[set lock strict]' \
    '(-L)-U[set locl non-strict]' \
    '-I[interactive]' \
    '-q[quiet]' \
    '-b-[default branch]:default branch:(1.1.1)' \
    '-c+:comment leader (not used)' \
    '-a+:login names (not work with CVS)' \
    '-A+:access list to append (not work with CVS)' \
    '-e-:access list to erase (not work with CVS)' \
    '-l-[lock]:revision to lock' \
    '-u-[unlock]:revision to unlock' \
    '-n+[name revision]:symbolic-name(\:revision)' \
    '-N+[force to name revision]:symbolic-name(\:revision)' \
    '-m+[replace log]:revision\:msg' \
    '-o+[delete revision]:range to delete' \
    '-s+[replace state attribute]:state(\:revision)' \
    '-t-[replace descriptive text]:descriptive text:_cvs_admin_t' \
    '-V+:version (obsolete)' \
    '-k+[set keyword substitution]:keyword substitution:_cvs_k' \
    '*:file:_cvs_files'
}

(( $+functions[_cvs_admin_t] )) ||
_cvs_admin_t() {
  if compset -P -; then
    _message -e descriptions 'descriptive text'
  else
    _files "$@"
  fi
}

(( $+functions[_cvs_annotate] )) ||
_cvs_annotate() {
  # "+lr:D:fR"
  _arguments -s \
    "(-R)-l[don't recurse]" \
    '-f[use head revision]' \
    '(-l)-R[recursive]' \
    '(-f -D)-r+[specify revision]:tag:_cvs_revisions' \
    '(-f -r)-D+[specify date]:date:_cvs_D' \
    '*:file:_cvs_files'
}

(( $+functions[_cvs_rannotate] )) ||
_cvs_rannotate() {
  # "+lr:D:fR"
  _arguments -s \
    "(-R)-l[don't recurse]" \
    '-f[use head revision]' \
    '(-l)-R[recursive]' \
    '(-f -D)-r+[specify revision]:tag:_cvs_revisions' \
    '(-f -r)-D+[specify date]:date:_cvs_D' \
    '*:file:_cvs_modules'
}

(( $+functions[_cvs_checkout] )) ||
_cvs_checkout() {
  # "+ANnk:d:flRpQqcsr:D:j:P"
  _arguments -s \
    '-N[don'\''t shorten module paths]' \
    '-A[reset sticky tags, dates and -k]' \
    '-n[disable checkout program]' \
    '-f[use most recent revision if -D/-r is not matched]' \
    "(-R)-l[don't recurse]" \
    '(-l)-R[recursive]' \
    '(-s)-c[module database]' \
    '(-c)-s[module database with status]' \
    '-P[prune empty directory]' \
    '-k+[keyword]:keyword substitution:_cvs_k' \
    '-d+[directory]:directory:_files -/' \
    '(-D)-r+[specify revision]:tag:_cvs_revisions' \
    '(-r)-D+[specify date]:date:_cvs_D' \
    '-j+[merge]:tag:_cvs_revisions' \
    '*:module:_cvs_modules'
}

(( $+functions[_cvs_commit] )) ||
_cvs_commit() {
  # "+nlRm:fF:r:"
  _arguments -s \
    '-n[disable module program]' \
    "(-R)-l[don't recurse]" \
    '(-l)-R[recursive]' \
    '-f[force to commit]' \
    '(-F)-m+[message]:message:_cvs_m' \
    '(-m)-F+[message file]:log message file:_files' \
    '-r+[specify revision]:tag:_cvs_revisions' \
    '*:modified file:_cvs_commit_arg'
}

(( $+functions[_cvs_commit_arg] )) ||
_cvs_commit_arg() {
  if (( $+opt_args[-f] )); then
    _cvs_files
  else
    _cvs_files_modified
  fi
}

(( $+functions[_cvs_diff] )) ||
_cvs_diff() {
  local of ofwuc ouc oss ofwy ofwg ofwl
  # output formats
  of="-y --side-by-side -n --rcs -e -f --ed -q --brief -c -C --context -u -U \
  --unified --old-group-format --new-group-format --changed-group-format \
  --unchanged-group-format --line-format --old-line-format --new-line-format \
  --unchanged-line-format"

  # output formats w/o unified and context
  ofwuc="-y --side-by-side -n --rcs -e -f --ed -q --brief --old-group-format \
  --new-group-format --changed-group-format --unchanged-group-format \
  --line-format --old-line-format --new-line-format --unchanged-line-format"

  # option specific to unified or context diff
  ouc='-L --label -p --show-c-function -F --show-function-line'

  # option specific to side by side
  oss='-W --width --left-column --suppress-common-lines'

  # output formats w/o side by side
  ofwy="-n --rcs -e -f --ed -q --brief -c -C --context -u -U --unified \
  --old-group-format --new-group-format --changed-group-format \
  --unchanged-group-format --line-format --old-line-format \
  --new-line-format --unchanged-line-format"

  # output formats w/o group format
  ofwg="-n --rcs -e -f --ed -q --brief -c -C --context -u -U --unified \
  --line-format --old-line-format --new-line-format --unchanged-line-format"

  # output formats w/o line format
  ofwl="-n --rcs -e -f --ed -q --brief -c -C --context -u -U --unified \
  --old-group-format --new-group-format --changed-group-format \
  --unchanged-group-format"

  # "+abcdefhilnpstuw0123456789BHNRC:D:F:I:L:U:V:W:k:r:"
  _arguments -s \
    "(-R)-l[don't recurse]" \
    '(-l)-R[recursive]' \
    '-k+[keyword]:keyword substitution:_cvs_k' \
    {,}'(-r)-D+[specify date]:date:_cvs_D' \
    {,}'(-D)-r+[specify revision]:tag:_cvs_revisions' \
    -{h,0,1,2,3,4,5,6,7,8,9} \
    '--binary[binary mode]' \
    '--ifdef=[set macro name for merged if-then-else format]:name' \
    '(-i --ignore-case)'{-i,--ignore-case}'[case insensitive]' \
    '(-w --ignore-all-space)'{-w,--ignore-all-space}'[ignore all white space]' \
    '(-b --ignore-space-change)'{-b,--ignore-space-change}'[ignore changes in the amount of white space]' \
    '(-B --ignore-blank-lines)'{-B,--ignore-blank-lines}'[ignore lines that are all blank]' \
    '(-I --ignore-matching-lines)'{-I+,--ignore-matching-lines=}'[ignore lines that match regex]:line exclusion regex' \
    '(-a --text)'{-a,--text}'[treat all files as text]' \
    "($of $oss)"{-C+,--context=-}'[context diff; specify lines of context]:number of lines of context' \
    "($of $oss)-c[output a context diff]" \
    "($of $oss)"{-U+,--unified=-}'[unified diff; specify lines of context]:number of lines of context' \
    "($of $oss)-u[output a unified diff]" \
    {,}"($ofwuc $oss -L --label)"{-L+,--label=}'[set label to use instead of file name]:label' \
    "($ofwuc $oss -p --show-c-function)"{-p,--show-c-function}'[show C function of each change]' \
    "($ofwuc $oss -F --show-function-line=)"{-F+,--show-function-line=}'[show the most recent line matching regex]:regex' \
    "($of $ouc $oss)--brief[output only whether files differ]" \
    "($of $ouc $oss)"{-e,--ed}'[output an ed script]' \
    "($of $ouc $oss)"{-f,--forward-ed}'[output a reversed ed script]' \
    "($of $ouc $oss)"{-n,--rcs}'[RCS format diff]' \
    "($of $ouc)--side-by-side[output in two columns]" \
    "($of $ouc)-y[output in two columns]" \
    "($ofwy $ouc -W --width)"{-W+,--width=}'[set size of line]:number of characters per line' \
    "($ofwy $ouc)--left-column[output only left column of common lines]" \
    "($ofwy $ouc)--suppress-common-lines[do not output common lines]" \
    "($ofwg $ouc $oss)--old-group-format=[set old group format]:old group format" \
    "($ofwg $ouc $oss)--new-group-format=[set new group format]:new group format" \
    "($ofwg $ouc $oss)--changed-group-format=[set changed group format]:changed group format" \
    "($ofwg $ouc $oss)--unchanged-group-format=[set unchanged group format]:unchanged group format" \
    "($ofwl $ouc $oss)--line-format=[set line format]:line format" \
    "($ofwl $ouc $oss)--old-line-format=[set old line format]:old line format" \
    "($ofwl $ouc $oss)--new-line-format=[set new line format]:new line format" \
    "($ofwl $ouc $oss)--unchanged-line-format=[set unchanged line format]:unchanged line format" \
    '--paginate[output through pr]' \
    '(-t --expand-tabs)'{-t,--expand-tabs}'[expand tabs to spaces]' \
    '--initial-tab[prepend a tab]' \
    '(-N --new-file)'{-N,--new-file}'[treat absent files as empty]' \
    '(-s --report-identical-files)'{-s,--report-identical-files}'[report when two files are the same]' \
    '--horizon-lines=[set number of lines to keep in prefix and suffix]:number of horizon lines' \
    '(-d --minimal)'{-d,--minimal}'[try to find a smaller set of changes]' \
    '(-H --speed-large-files)'{-H,--speed-large-files}'[assume large files and many small changes]' \
    '*:file:_cvs_diff_arg'
}

(( $+functions[_cvs_diff_arg] )) ||
_cvs_diff_arg() {
  _cvs_files_modified || _cvs_files
}

(( $+functions[_cvs_edit] )) ||
_cvs_edit() {
  # "+lRa:"
  _arguments -s \
    "(-R)-l[don't recurse]" \
    '(-l)-R[recursive]' \
    '-a+[specify action]:action:(edit unedit commit all none)' \
    '*:file:_cvs_files'
}

(( $+functions[_cvs_editors] )) ||
_cvs_editors() {
  # "+lR"
  _arguments -s \
    "(-R)-l[don't recurse]" \
    '(-l)-R[recursive]' \
    '*:file:_cvs_files'
}

(( $+functions[_cvs_export] )) ||
_cvs_export() {
  # "+Nnk:d:flRQqr:D:"
  _arguments -s \
    '-N[don'\''t shorten module paths]' \
    '-n[disable checkout program]' \
    '-f[use most recent revision if -D/-r is not matched]' \
    "(-R)-l[don't recurse]" \
    '(-l)-R[recursive]' \
    '-k+[keyword]:keyword substitution:_cvs_k' \
    '-d+[directory]:directory:_files -/' \
    '(-D)-r+[specify revision]:tag:_cvs_revisions' \
    '(-r)-D+[specify date]:date:_cvs_D' \
    '*:module:_cvs_modules'
}

(( $+functions[_cvs_history] )) ||
_cvs_history() {
  # "+Tacelow?D:b:f:m:n:p:r:t:u:x:X:z:"
  _arguments -s \
    '-T[all tags]' \
    '-a[all users]' \
    '-c[modified files]' \
    '-e[everything]' \
    '-l[last modification]' \
    '-o[check-outed modules]' \
    '-w[working directory]' \
    '-D+[since date]:date:_cvs_D' \
    '-b+[back to record]:string' \
    '-f+[specify file]:file:_cvs_files' \
    '-m+[specify module]:module:_cvs_modules' \
    '*-n+[in module]:module:_cvs_modules' \
    '*-p+[in repository]:repository' \
    '-r+[since revision]:rev' \
    '-t+[since tag]:tag' \
    '*-u+[specify user]:user name' \
    '-x+[specify type]:type:_cvs_history_x' \
    '-X+[debugging]:arg' \
    '-z+[specify timezone]:timezone' \
    '*:file:_cvs_files'
}

(( $+functions[_cvs_history_x] )) ||
_cvs_history_x() {
  _values -s '' 'type' \
    'F[release]' \
    'O[checkout]' \
    'E[export]' \
    'T[rtag]' \
    'C[merge collision-detected]' \
    'G[merge succeed]' \
    'U[working file was copied]' \
    'W[working file was deleted]' \
    'A[a file was added]' \
    'M[a file was modified]' \
    'R[a file was removed]'
}

(( $+functions[_cvs_import] )) ||
_cvs_import() {
  # "+Qqdb:m:I:k:W:"
  _arguments -s \
    '-d[use file modification time]' \
    '-b+[specify vendor branch]:branch:(1.1.3)' \
    '-m+[message]:message:_cvs_m' \
    '*-I+[ignore files]:name:_files' \
    '-k+[keyword]:keyword substitution:_cvs_k' \
    '*-W+[wrapper specification]:spec:_files' \
    ':repository:_cvs_modules' \
    ':vendor tag:_cvs_vendor_branches' \
    ':release tag'
}

(( $+functions[_cvs_log] )) ||
_cvs_log() {
  # "+bd:hlNRr::s:tw::"
  _arguments -s \
    '-b[default branch]' \
    '(-t)-h[header]' \
    '-l[don'\''t recurse]' \
    '-R[print the name of RCS file in the repository]' \
    '-N[don'\''t list tags]' \
    '(-h)-t[header with descriptive text]' \
    '-d+[specify dates]:date range' \
    '-r-[specify revisions]:revisions' \
    '-s+[specify states]:state:_sequence compadd - Exp Stab Rel dead' \
    '-w-[specify logins]:login list' \
    '*:file:_cvs_files'
}

(( $+functions[_cvs_rlog] )) ||
_cvs_rlog() {
  # "+bd:hlNRr::s:tw::"
  _arguments -s \
    '-b[default branch]' \
    '(-t)-h[header]' \
    "(-R)-l[don't recurse]" \
    '(-l)-R[recursive]' \
    '-N[don'\''t list tags]' \
    '(-h)-t[header with descriptive text]' \
    '-d+[specify dates]:date range' \
    '-r-[specify revisions]:revisions' \
    '-s+[specify states]:state:_sequence compadd - Exp Stab Rel dead' \
    '-w-[specify logins]:login list' \
    '*:file:_cvs_modules'
}

(( $+functions[_cvs_rdiff] )) ||
_cvs_rdiff() {
  # "+V:k:cuftsQqlRD:r:"
  _arguments -s \
    '-c[output a context diff]' \
    '-u[output a unified diff]' \
    '-f[use most recent revision if -D/-r is not matched]' \
    '-s[short patch]' \
    "(-R)-l[don't recurse]" \
    '(-l)-R[recursive]' \
    '-V+[specify version]:version' \
    '-k+[keyword]:keyword substitution:_cvs_k' \
    '(-D -D -r -r)-t[top two differences]' \
    '(-t -r)-D+[specify date]:date:_cvs_D' \
    '(-t -r)-D+[specify date]:date:_cvs_D' \
    '(-t -D)-r+[specify revision]:tag:_cvs_revisions' \
    '(-t -D)-r+[specify revision]:tag:_cvs_revisions' \
    '*:module:_cvs_modules'
}

(( $+functions[_cvs_release] )) ||
_cvs_release() {
  # "+Qdq"
  _arguments -s \
    '-d[delete]' \
    '*:directory:_files -/'
}

(( $+functions[_cvs_remove] )) ||
_cvs_remove() {
  # "+flR"
  _arguments -s \
    '-f[force to remove]' \
    "(-R)-l[don't recurse]" \
    '(-l)-R[recursive]' \
    '*:removed file:_cvs_remove_arg'
}

(( $+functions[_cvs_remove_arg] )) ||
_cvs_remove_arg() {
  if (( $+opt_args[-f] )); then
    _cvs_files
  else
    _cvs_files_removed
  fi
}

(( $+functions[_cvs_rtag] )) ||
_cvs_rtag() {
  # "+FanfQqlRdbr:D:"
  _arguments -s \
    '(-d)-F[move tag if already exists]' \
    '(-d)-a[clear tag from removed files]' \
    '-n[disable tag program]' \
    '(-d)-f[force a head revision]' \
    "(-R)-l[don't recurse]" \
    '(-l)-R[recursive]' \
    '(-b)-d[delete tag]' \
    '(-d)-b[create branch]' \
    '-D+[specify date]:date:_cvs_D' \
    '-r+[specify revision]:tag:_cvs_revisions' \
    ':tag' \
    '*:module:_cvs_modules'
}

(( $+functions[_cvs_status] )) ||
_cvs_status() {
  # "+vlR"
  _arguments -s \
    '-v[verbose]' \
    "(-R)-l[don't recurse]" \
    '(-l)-R[recursive]' \
    '*:file:_cvs_files'
}

(( $+functions[_cvs_tag] )) ||
_cvs_tag() {
  # "+FQqlRcdr:D:bf"
  _arguments -s \
    '(-d)-F[move tag if already exists]' \
    "(-R)-l[don't recurse]" \
    '(-l)-R[recursive]' \
    '-c[check that working files unmodified]' \
    '(-b)-d[delete tag]' \
    '(-d)-b[create branch]' \
    '(-d)-f[force a head revision]' \
    '-r+[specify revision]:tag:_cvs_revisions' \
    '-D+[specify date]:date:_cvs_D' \
    ':tag:_cvs_revisions' \
    '*:file:_cvs_files'
}

(( $+functions[_cvs_unedit] )) ||
_cvs_unedit() {
  # "+lR"
  _arguments -s \
    "(-R)-l[don't recurse]" \
    '(-l)-R[recursive]' \
    '*:file:_cvs_files'
}

(( $+functions[_cvs_update] )) ||
_cvs_update() {
  # "+ApCPflRQqduk:r:D:j:I:W:"
  _arguments -s \
    '-C[overwrite local modification]' \
    '-A[reset sticky tags, dates and -k]' \
    '-p[check out to standard output]' \
    '-P[prune empty directory]' \
    '-f[use head revision]' \
    "(-R)-l[don't recurse]" \
    '(-l)-R[recursive]' \
    '-d[create directories]' \
    '-k+[keyword]:keyword substitution:_cvs_k' \
    '(-D)-r+[specify revision]:tag:_cvs_revisions' \
    '(-r)-D+[specify date]:date:_cvs_D' \
    '*-j+[merge]:tag:_cvs_revisions' \
    '*-I+[ignore files]:file:_files' \
    '*-W+[wrapper specification]:spec:_files' \
    '*:file:_cvs_files'
}

(( $+functions[_cvs_watch] )) ||
_cvs_watch() {
  local expl

  if (( CURRENT == 2 )); then
    _wanted values expl 'watch command' compadd on off add remove
  else
    case "$words[2]" in
      on|off) # "+lR"
	_arguments -s \
	  "(-R)-l[don't recurse]" \
	  '(-l)-R[recursive]' \
	  ':watch command' \
	  '*:file:_cvs_files'
      ;;
      add|remove) # "+lRa:"
	_arguments -s \
	  "(-R)-l[don't recurse]" \
	  '(-l)-R[recursive]' \
	  '*-a+[specify action]:action:(edit unedit commit all none)' \
	  ':watch command' \
	  '*:file:_cvs_files'
      ;;
    esac
  fi
}

(( $+functions[_cvs_watchers] )) ||
_cvs_watchers() {
  # "+lR"
  _arguments -s \
    "(-R)-l[don't recurse]" \
    '(-l)-R[recursive]' \
    '*:file:_cvs_files'
}

(( $+functions[_cvs_loadstat] )) ||
_cvs_loadstat() {
  (( $+_cvs_loadstat_status )) && return $_cvs_loadstat_status

  zmodload -F zsh/stat b:zstat 2>/dev/null
  (( _cvs_loadstat_status = ! $+builtins[zstat] ))
  return $_cvs_loadstat_status
}

(( $+functions[_cvs_root] )) ||
_cvs_root() {
  local cvspassfile id slash

  typeset -gU _cvs_roots

  if [[ -f "${cvspassfile::=${CVS_PASSFILE:-$HOME/.cvspass}}" ]]; then
    if _cvs_loadstat; then
      id="$(LC_ALL=C builtin zstat -g +mtime -F '%Y/%m/%d-%T' "$cvspassfile")"
    else
      id="$(LC_ALL=C ls -l "$cvspassfile")"
    fi
    if [[ "$id" != "$_cvs_pass_id" ]]; then
      slash=/
      _cvs_roots=($_cvs_roots ${${${${(f)"$(<$cvspassfile)"}#/1 }%% *}/:2401${slash}/:/})
      _cvs_pass_id="$id"
    fi
  fi

  _tags files && {
    compadd -M 'r:|[:@./]=** r:|=**' "$@" -a _cvs_roots || {
      compset -P ':(local|fork):'; _files "$@" -W / -/
    }
  }
}

(( $+functions[_cvs_tempdir] )) ||
_cvs_tempdir() {
  _tags directories && compadd "$@" $TMPPREFIX:h $TMPDIR /tmp
}

(( $+functions[_cvs_user_variable] )) ||
_cvs_user_variable() {
  if compset -P 1 '*='; then
    _default
  else
    _message -e variables "variable"
  fi
}

# define completion functions for cvs global options.

(( $+functions[_cvs_editor] )) ||
_cvs_editor() {
  _tags commands && compadd "$@" vi
}

# define completion functions for cvs common options and arguments.

(( $+functions[_cvs_D] )) ||
_cvs_D() {
  _tags values && compadd "$@" today yesterday week\ ago month\ ago
}

(( $+functions[_cvs_k] )) ||
_cvs_k() {
  _values 'keyword substitution' \
    'kv[generate keyword strings using the default form]' \
    "kvl[include locker's name in strings if given revision is locked]" \
    'k[generate only keyword names in keyword strings; omit their values]' \
    'o[generate the old keyword string as present in the file before check in]' \
    "b[binary - like \`o' but also inhibit line ending conversions]" \
    'v[generate only keyword values for keyword strings]'
}

(( $+functions[_cvs_m] )) ||
_cvs_m() {
  _message -e messages "log message"
}

(( $+functions[_cvs_modules] )) ||
_cvs_modules() {
  if compset -P '(#m)(*/)'; then
    _cvs_sub_modules "$cvsroot" "${MATCH%/}"
  else
    _cvs_top_modules "$cvsroot"
  fi
}

(( $+functions[_cvs_top_modules] )) ||
_cvs_top_modules() {
  local root="$1"

  if [[ -d $root ]]; then
    _wanted modules expl 'module name' \
	compadd - $root/*(/:t) \
	    ${${(M)${(f)"$(<$root/CVSROOT/modules)"}:#[^#]*}%%[ 	]*}
  else
    if [[ "$_cvs_top_modules_cache_key" != "$root" ]]; then
      _cvs_top_modules_cache_key="$root"
      _cvs_top_modules_cache_mods=()
      if zstyle -T ":completion:${curcontext}:" remote-access; then
	_cvs_remote_directories "$root" . _cvs_top_modules_cache_mods
	_cvs_top_modules_cache_mods=(
	  "$_cvs_top_modules_cache_mods[@]"
	  ${(M)${${(f)"$(
	    CVS_IGNORE_REMOTE_ROOT= _call_program modules cvs -d "$root" co -c
	  )"}%%[ 	]*}:#?*}
	)
      fi
    fi
    if (( $#_cvs_top_modules_cache_mods )); then
      _wanted modules expl 'module name' \
	compadd -a _cvs_top_modules_cache_mods
    else
      _message -e modules 'module name'
    fi
  fi
}

(( $+functions[_cvs_sub_modules] )) ||
_cvs_sub_modules() {
  local root="$1" dir="$2" ignore

  if [[ -d $root ]]; then
    _wanted modules expl 'module name' \
	_path_files -W "($root/$dir)" -/ -F "(Attic */Attic)"
  else
    if [[ $_cvs_sub_modules_cache_key != "$root $dir" ]]; then
      _cvs_sub_modules_cache_key="$root $dir"
      _cvs_sub_modules_cache_mods=()
      if zstyle -T ":completion:${curcontext}:" remote-access; then
	_cvs_remote_directories "$root" "$dir" _cvs_sub_modules_cache_mods
      fi
    fi
    if (( $#_cvs_sub_modules_cache_mods )); then
      _wanted modules expl 'module name' \
	compadd -qS/ -a _cvs_sub_modules_cache_mods
    else
      _message -e modules 'module name'
    fi
  fi
}

# _cvs_run cvsroot directory cvs-arguments...
(( $+functions[_cvs_run] )) ||
_cvs_run() {
  local cvsroot="$1" dir="$2"
  shift 2
  local d=${TMPPREFIX:-/tmp/zsh}-cvs-work-$$
  rm -rf $d
  mkdir $d &&
  (
  chmod 0700 $d &&
  builtin cd -q $d &&
  mkdir CVS >&/dev/null || return 1
  print -r - "$cvsroot" > CVS/Root
  print "$dir" > CVS/Repository
  print D > CVS/Entries
  CVS_IGNORE_REMOTE_ROOT= cvs "$@"
  )
  rm -rf $d
}

# _cvs_remote_directories cvsroot directory [variable]
(( $+functions[_cvs_remote_directories] )) ||
_cvs_remote_directories() {
  local root="$1" dir="$2" subdirs
  shift 2
  subdirs=(${${(M)${(f)"$(_call_program directories _cvs_run "$root" "$dir" update -r00 -d -p 2>&1)"}:#* New directory \`*\' -- ignored}/(#b)*\`(*)\'*/$match[1]})
  if (( $# )); then
    eval "$1=(\"\$subdirs[@]\")"
  else
    if (( $#subdirs )); then
      print -lr - $subdirs
    fi
  fi
}

(( $+functions[_cvs_vendor_branches] )) ||
_cvs_vendor_branches() {
  local expl vendor_branch
  vendor_branch=()
  if zstyle -T ":completion:${curcontext}:" remote-access; then
    if [[ -n $opt_args[-b] ]]; then
      _cvs_extract_vendor_branch -b "$opt_args[-b]" "$cvsroot" "$line[1]" \
	vendor_branch
    else
      _cvs_extract_vendor_branch "$cvsroot" "$line[1]" vendor_branch
    fi
  fi
  if (( $#vendor_branch )); then
    _wanted values expl 'vendor branch' compadd -a vendor_branch
  else
    _message -e branches 'vendor branch'
  fi
}

# _cvs_extract_vendor_branch [-b numeric-branch] cvsroot directory [variable]
(( $+functions[_cvs_extract_vendor_branch] )) ||
_cvs_extract_vendor_branch() {
  local numeric='1\.1\.1'
  if [[ $1 = -b ]]; then
    numeric="${2//./\\.}"
    shift 2
  fi
  local root="$1" dir="$2"
  shift 2

  local vtags
  vtags=($(
    _call_program tags _cvs_run "$root" "$dir" -Q log -h 2>/dev/null |
    sed -ne $'/^symbolic names:/{
n
:loop
/^[^ \t]/d
/: '"$numeric"$'$/b found
n
b loop
:found
s/^[ \t]*\\(.*\\): '"$numeric"$'$/\\1/p
n
/^[ \t]/b found
q
}'))
  if (( $# )); then
    eval "$1=(\"\$vtags[@]\")"
  else
    if (( $#vtags )); then
      print -lr - "$vtags[@]"
    fi
  fi
}

(( $+functions[_cvs_revisions] )) ||
_cvs_revisions() {
  local expl

  if [[ $_cvs_revisions_key != $cvsroot:$PWD ]]; then
    _cvs_revisions_key="$cvsroot:$PWD"
    if zstyle -T ":completion:${curcontext}:" remote-access; then
      _cvs_revisions_cache=(
	$(CVS_IGNORE_REMOTE_ROOT= _call_program tags cvs -d "$cvsroot" -q status -vl .|
	  sed -n -e '/No Tags Exist/d' \
		 -e 's/^	\([A-Za-z][-_0-9A-Za-z+]*\).*/\1/p'|
	  sort|uniq)
      )
    else
      _cvs_revisions_cache=()
    fi
  fi

  if (( $#_cvs_revisions_cache )); then
    _wanted values expl revision compadd -a _cvs_revisions_cache
  else
    _message -e revisions revision
  fi
}

# define completion functions for files maintained by cvs.

(( $+functions[_cvs_files] )) ||
_cvs_files() {
  _alternative \
    'directories:directory:_cvs_existing_directories' \
    'existing-files:file:_cvs_existing_entries' \
    'removed-files:removed file:_cvs_nonexistent_entries'
}

(( $+functions[_cvs_files_modified] )) ||
_cvs_files_modified() {
  _alternative \
    'directories:directory:_cvs_existing_directories' \
    'existing-files:file:_cvs_modified_entries' \
    'removed-files:removed file:_cvs_nonexistent_entries'
}

(( $+functions[_cvs_files_removed] )) ||
_cvs_files_removed() {
  _alternative \
    'directories:directory:_cvs_existing_directories' \
    'removed-files:removed file:_cvs_nonexistent_entries'
}

(( $+functions[_cvs_files_unmaintained] )) ||
_cvs_files_unmaintained() {
  _cvs_nonentried_files ||
  _cvs_existing_directories ||
  _cvs_strict_nonentried_files
}

(( $+functions[_cvs_existing_directories] )) ||
_cvs_existing_directories() {
  local expl
  _wanted directories expl directory _path_files -g "*~(*/|)CVS(/)" ||
  _cvs_path_prefixes
}

(( $+functions[_cvs_existing_entries] )) ||
_cvs_existing_entries() {
  local expl match linedir realdir pat
  match=()
  : ${PREFIX:#(#b)(*/)(*)}
  linedir="$match[1]"
  realdir=${(e)~linedir}
  [[ -f "$realdir"CVS/Entries ]] &&
  pat=(${(@)${(@)${(@M)${(@f)"$(<"$realdir"CVS/Entries)"}:#/*}#/}%%/*})
  (( ${#pat} )) && _wanted files expl file _path_files -a pat
}

(( $+functions[_cvs_modified_entries] )) ||
_cvs_modified_entries() {
  if _cvs_loadstat; then
    local expl match linedir realdir pat slash=/
    match=()
    : ${PREFIX:#(#b)(*/)(*)}
    linedir="$match[1]"
    realdir=${(e)~linedir}
    [[ -f "$realdir"CVS/Entries ]] && {
      local -a mtime
      LC_ALL=C builtin zstat -A mtime -gn +mtime -F $'%a %b %e %T %Y\n' ${realdir}*(D) 2>/dev/null
      [[ -n ${pat::="${(@j:|:)${(@)${(@)${(@)${(@)${(@)${(@M)${(@f)"$(<"$realdir"CVS/Entries)"}:#/*}#/}/${slash}[^${slash}]#${slash}//}%/[^/]#/[^/]#}:#${(j:|:)~${(f)${(j:/:)${mtime##*/}}//(#m)[][*?()<|^~#\\]/\\$MATCH}#/}}%%/*}//(#m)[][*?()<|^~#\\]/\\$MATCH}"} ]]
    } &&
    _wanted files expl 'modified file' _path_files -g "$pat"
  else
    _cvs_existing_entries
  fi
}

(( $+_cvs_ignore_default )) ||
local _cvs_ignore_default=(
  RCS SCCS CVS CVS.adm RCSLOG 'cvslog.*' tags TAGS .make.state .nse_depinfo
  '*\~' '\#*' '.\#*' ',*' '_$*' '*$' '*.old' '*.bak' '*.BAK' '*.orig' '*.rej'
  '.del-*' '*.a' '*.olb' '*.o' '*.obj' '*.so' '*.exe' '*.Z' '*.elc' '*.ln'
  core
)

(( $+functions[_cvs_strict_nonentried_files] )) ||
_cvs_strict_nonentried_files() {
  local expl match linedir realdir omitpats

  match=()
  : ${PREFIX:#(#b)(*/)(*)}
  linedir="$match[1]"
  realdir=${(e)~linedir}
  [[ -f "$realdir"CVS/Entries ]] && {
    omitpats=(
      ${${${${(M)${(f)"$(<"$realdir"CVS/Entries)"}:#/*}#/}%%/*}//(#m)[][*?()<|^~#\\]/\\$MATCH}
    )
    if (( $#omitpats )); then
      _path_files -g "*~(*/|)(${(j:|:)~omitpats})(D.)"
    else
      _path_files -g "*~(*/|)(D.)"
    fi
  }
}

(( $+functions[_cvs_nonentried_files] )) ||
_cvs_nonentried_files() {
  local expl match linedir realdir omitpats

  match=()
  : ${PREFIX:#(#b)(*/)(*)}
  linedir="$match[1]"
  realdir=${(e)~linedir}
  [[ -f "$realdir"CVS/Entries ]] && {
    omitpats=(
      ${${${${(M)${${(f)"$(<"$realdir"CVS/Entries)"}:#/*/-*/*/*/*}:#(D|)/*}#(D|)/}%%/*}//(#m)[][*?()<|^~#\\]/\\$MATCH}
      $_cvs_ignore_default
      ${=cvsignore}
    )
    [[ -r ~/.cvsignore ]] && omitpats=($omitpats $(<~/.cvsignore))
    [[ -r ${realdir}.cvsignore ]] && omitpats=($omitpats $(<${realdir}.cvsignore))
    omitpats=($omitpats $=CVSIGNORE)

    _path_files -g "*~(*/|)(${(j:|:)~omitpats})(D.)"
  }
}

(( $+functions[_cvs_nonexistent_entries] )) ||
_cvs_nonexistent_entries() {
  local expl match linedir realdir files
  match=()
  : ${PREFIX:#(#b)(*/)(*)}
  linedir="$match[1]"
  realdir=${(e)~linedir}
  files=(${realdir}*(D:t))
  [[ -f "$realdir"CVS/Entries ]] && {
    files=(
      ${${${${(M)${(f)"$(<"$realdir"CVS/Entries)"}:#(D|)/*}#(D|)/}%%/*}:#${(j:|:)~${files//(#m)[][*?()<|^~#\\]/\\$MATCH}}}
    )
    compquote files
    _wanted files expl 'removed file' compadd -Qp "$linedir" -a files
  }
}

(( $+functions[_cvs_path_prefixes] )) ||
_cvs_path_prefixes() {
  local expl match
  match=()
  [[ "$PREFIX$SUFFIX" = (#b)(*)(/[^/]#) ]] && {
    PREFIX="$match[1]"
    ISUFFIX="$match[2]$ISUFFIX"
    SUFFIX=''
    _wanted directories expl directory \
	_path_files -g "*~($PREFIX|(*/|)CVS)(/)" -S ''
  }
}

_cvs "$@"