#compdef combinediff interdiff filterdiff flipdiff grepdiff lsdiff splitdiff unwrapdiff

local args
args=(
  '(-)--help[display help information]'
  '(-)--version[display version information]'
)

case $service in
  (inter|combine|filter|flip|ls|grep)diff)
    args+=(
      '(-p --strip-match=)'{-p,--strip-match=}'[specify number of path prefix components to strip]:number of path prefix components to strip'
      '(-z --decompress)'{-z,--decompress}'[decompress .gz and .bz2 files]'
    )
  ;|
  interdiff|combinediff|flipdiff)
    args+=(
      '(-q --quiet)'{-q,--quiet}'[quieter output]'
      '(-U --unified)'{-U,--unified=}'[specify lines of context to include]:lines of context'
      \*{-d,--drop-context=}"[don't include context on files matching pattern]:pattern:_files"
      '(-w --ignore-all-space)'{-w,--ignore-all-space}'[ignore all whitespace changes in patches]'
      '(-B --ignore-blank-lines)'{-B,--ignore-blank-lines}'[ignore changes whose lines are all blank]'
      '(-i --ignore-case)'{-i,--ignore-case}'[ignore case differences]'
      '(-b --ignore-space-change)'{-b,--ignore-space-change}'[ignore changes in the amount of whitespace]'
      '!(--in-place)--interpolate' '!-h'
      '!(--no-revert-omitted --in-place)--combinediff'
      '!(--no-revert-omitted)--flip'
      '1:diff 1:_files' '2:diff 2:_files'
    )
  ;|
  interdiff)
    args+=(
      "--no-revert-omitted[don't revert files changed in only the first patch]"
    )
  ;;
  flipdiff) args+=( '--in-place[write output to original input files]' ) ;;
  filterdiff|grepdiff|lsdiff)
    args+=(
      '(-i --include)'{-i,--include}'[include only files matching pattern]:pattern:_files'
      '(-x --exclude)'{-x,--exclude}'[exclude files matching pattern]:pattern:_files'
      '(-# --hunks)'{-#+,--hunks=}'[only list hunks within specified range]:range'
      '--lines=[only list hunks containing lines within specified range]:range'
      '(-F --files)'{-F+,--files=}'[only list files within specified range]:range'
      '--strip=[remove specified number of pathname components before displaying]:components'
      '--addprefix=[insert specified path prefix before displaying path names]:prefix:_directories'
      '*:diff file:_files'
    )
  ;|
  grepdiff|lsdiff)
    args+=(
      '(-n --line-number)'{-n,--line-number}'[show line number at which each patch begins]'
      '(-N --number-files)'{-N,--number-files}'[show file number before each filename]'
      '(-s --status)'{-s,--status}'[mark added, modified and removed files]'
    )
  ;|
  lsdiff)
    args+=(
      '(-E --empty-files-as-removed)'{-E,--empty-files-as-removed}'[treat empty files as absent]'
      \*{-v,--verbose}'[verbose operation]' 
      '(-H --with-filename -h --no-filename)'{-H,--with-filename}'[print the name of the patch file containing each patch]'
      '!--filter' '!--grep'
    )
  ;;
  grepdiff|filterdiff)
    args+=(
      '(-I --include-from-file)'{-I+,--include-from-file=}'[include only files matching pattern listed in specified file]:file:_files'
      '--annotate[annotate each hunk with the filename and hunk number]'
      '--format=[use specified output format]:format:(unified context)'
      '--addnewprefix=[insert specified path prefix before new file path names]:prefix:_directories'
      '--addoldprefix=[insert specified path prefix before original file path names]:prefix:_directories'
      '--as-numbered-lines=[display lines of selected hunks]:line numbers:(before after)'
      "--remove-timestamps[don't include timestamps in output]"
    )
  ;|
  filterdiff)
    args+=(
      '(-X --exclude-from-file)'{-X+,--exclude-from-file=}'[exclude files matching any pattern listed in specified file]:file:_files'
      '(-v --verbose --clean)'{-v,--verbose}'[always show non-diff lines in output]'
      '(-v --verbose)--clean[always remove all non-diff lines from output]'
    )
  ;;
  grepdiff)
    args+=(
      '(-E --extended-regexp)'{-E,--extended-regexp}'[use extended regular expressions]'
      '(-H --with-filename -h --no-filename)'{-h,--no-filename}"[don't print the name of the patch file containing each patch]"
      '(-f --file)'{-f+,--file=}'[read regular expressions from file]:file:_files'
      '--output-matching=[display the matching hunk- or file-level diffs]:level:(hunk file)'
    )
  ;;
  splitdiff)
    args+=(
      '-a[split every single file level patch]'
      '-d[create file names such as a_b.c.patch for a patch that modifies a/b.c]'
      '-D[write output files into specified directory]:_directories'
      '-p[specify number of path prefix components to strip]:number of path prefix components to strip'
      "-E[don't use .patch filename extension when writing output files]"
      '1:diff file:_files'
    )
  ;;
  unwrapdiff)
    args+=( '-v[verbose operation]' '*:diff file:_files' )
  ;;
esac

_arguments -s $args