zsh/Completion/Unix/Command/_global

#compdef global

local cmds="(-c --completion -f --file -g --grep -I --idutils -p --print-dbpath -P --path -u --update --version --help)"

_arguments \
  "$cmds"{-c,--completion}'[completion on prefix]:prefix:' \
  "$cmds"{-f,--file}'[print function definitions in file]' \
  "$cmds"{-g,--grep}'[print all lines which match pattern using grep]:pattern' \
  "$cmds"{-I,--idutils}'[print all lines which match pattern using id-utils]:pattern' \
  "$cmds"{-p,--print-dbpath}'[print location of GTAGS]' \
  "$cmds"{-P,--path}'[print paths matching pattern]:pattern:' \
  "$cmds"{-u,--update}'[locate tag files and update incrementally]' \
  '(-a --absolute)'{-a,--absolute}'[print absolute path names]' \
  '(-e --regexp :)'{-e,--regexp}'[specify pattern]:pattern:_global_tags' \
  '(-G --basic-regexp :)'{-G,--basic-regexp}'[specify basic regexp to use]:word:_global_tags' \
  '(-i --ignore-case)'{-i,--ignore-case}'[ignore case in patterns]' \
  '(-l --local)'{-l,--local}'[print just objects which exist under the current directory]' \
  '(-n --nofilter)'{-n,--nofilter}'[suppress sort filter and path conversion filter]' \
  '(-o --other)'{-o,--other}'[search in other files, not just source files (with -g)]' \
  '(-q --quiet)'{-q,--quiet}'[quiet mode]' \
  '(-r --reference --rootdir)'{-r,--reference,--rootdir}'[find object references instead of definitions]' \
  '(-s --symbol)'{-s,--symbol}'[find symbols instead of function names]:pattern' \
  '(-t --tags)'{-t,--tags}'[output in standard ctags format]' \
  '(-T --through -s -r -l)'{-T,--through}'[search through all tag files in GTAGSLIBPATH]' \
  '(-v --verbose)'{-v,--verbose}'[verbose mode]' \
  '(-x --cxref)'{-x,--cxref}'[additionally list line number and contents]' \
  '(- :)--version[display version information]' \
  '(- :)--help[display help information]' \
  ':word:_global_tags'