mirror of
git://git.code.sf.net/p/zsh/code
synced 2024-11-19 21:44:11 +01:00
200 lines
7.4 KiB
Plaintext
200 lines
7.4 KiB
Plaintext
#autoload
|
|
|
|
# A simple compiler for _arguments descriptions. The first argument of
|
|
# _arg_compile is the name of an array parameter in which the parse is
|
|
# returned. The remaining arguments form a series of `phrases'. Each
|
|
# `phrase' begins with one of the keywords "argument", "option", or "help"
|
|
# and consists of a series of keywords and/or values. The syntax is as
|
|
# free-form as possible, but "argument" phrases generally must appear in
|
|
# the same relative position as the corresponding argument on the command
|
|
# line to be completed, and there are some restrictions on ordering of
|
|
# keywords and values within each phrase.
|
|
#
|
|
# Anything appearing before the first phrase or after the last is passed
|
|
# through verbatim. (See TODO.) If more detailed mixing of compiled and
|
|
# uncompiled fragments is necessary, use two or more calls, either with
|
|
# different array names or by passing the output of each previous call
|
|
# through the next.
|
|
#
|
|
# In the documentation below, brackets [ ] indicate optional elements and
|
|
# braces { } indicate elements that may be repeated zero or more times.
|
|
# Except as noted, bracketed or braced elements may appear in any order
|
|
# relative to each other, but tokens within each element are ordered.
|
|
#
|
|
# argument [POS] [means MSG] [action ACT]
|
|
#
|
|
# POS may be an integer N for the Nth argument or "*" for all, and
|
|
# must appear first if it appears at all.
|
|
# MSG is a string to be displayed above the matches in a listing.
|
|
# ACT is (currently) as described in the compsys manual.
|
|
#
|
|
# option OPT [follow HOW] [explain STR] {unless XOR} \
|
|
# {[means MSG] [action ACT]} [through PAT [means MSG] [action ACT]]
|
|
#
|
|
# OPT is the option, prefixed with "*" if it may appear more than once.
|
|
# HOW refers to a following argument, and may be one of:
|
|
# "close" must appear in the same word (synonyms "join" or "-")
|
|
# "next" the argument must appear in the next word (aka "split")
|
|
# "loose" the argument may appear in the same or the next word ("+")
|
|
# "assign" as loose, but must follow an "=" in the same word ("=")
|
|
# HOW should be suffixed with a colon if the following argument is
|
|
# _not_ required to appear.
|
|
# STR is to be displayed based on compconfig[describe_options].
|
|
# XOR is another option in combination with which OPT may not appear.
|
|
# It may be ":" to disable non-option completions when OPT is present.
|
|
# MSG is a string to be displayed above the matches in a listing.
|
|
# ACT is (currently) as described in the compsys manual.
|
|
# PAT is either "*" for "all remaining words on the line" or a pattern
|
|
# that, if matched, marks the end of the arguments of this option.
|
|
# The "through PAT ..." description must be the last.
|
|
# PAT may be suffixed with one colon to narrow the $words array to
|
|
# the remainder of the command line, or with two colons to narrow
|
|
# to the words before (not including) the next that matches PAT.
|
|
#
|
|
# help PAT [means MSG] action ACT
|
|
#
|
|
# ACT is applied to any option output by --help that matches PAT.
|
|
# Do not use "help" with commands that do not support --help.
|
|
# PAT may be suffixed with a colon if the following argument is
|
|
# _not_ required to appear (this is usually inferred from --help).
|
|
# MSG is a string to be displayed above the matches in a listing.
|
|
|
|
# EXAMPLE:
|
|
# This is from _gprof in the standard distribution. Note that because of
|
|
# the brace expansion trick used in the "function name" case, no attempt
|
|
# is made to use `phrase' form; that part gets passed through unchanged.
|
|
# It could simply be moved to the _arguments call ahead of "$args[@]".
|
|
#
|
|
# _arg_compile args -s -{a,b,c,D,h,i,l,L,s,T,v,w,x,y,z} \
|
|
# -{A,C,e,E,f,F,J,n,N,O,p,P,q,Q,Z}:'function name:->funcs' \
|
|
# option -I means directory action _dir_list \
|
|
# option -d follow close means "debug level" \
|
|
# option -k means "function names" action '->pair' \
|
|
# option -m means "minimum execution count" \
|
|
# argument means executable action '_files -g \*\(\*\)' \
|
|
# argument means "profile file" action '_files -g gmon.\*' \
|
|
# help '*=name*' means "function name" action '->funcs' \
|
|
# help '*=dirs*' means "directory" action _dir_list
|
|
# _arguments "$args[@]"
|
|
|
|
# TODO:
|
|
# Verbose forms of various actions, e.g. (but not exactly)
|
|
# "state foo" becomes "->foo"
|
|
# "completion X explain Y ..." becomes "((X\:Y ...))"
|
|
# etc.
|
|
# Represent leading "*" in OPT some other way.
|
|
# Represent trailing colons in HOW and PAT some other way.
|
|
# Stricter syntax checking on HOW, sanity checks on XOR.
|
|
# Something less obscure than "unless :" would be nice.
|
|
# Warning or other syntax check for stuff after the last phrase.
|
|
|
|
emulate -L zsh
|
|
local -h argspec dspec helpspec prelude xor
|
|
local -h -A amap dmap safe
|
|
|
|
[[ -n "$1" ]] || return 1
|
|
[[ ${(tP)${1}} = *-local ]] && { print -R NAME CONFLICT: $1 1>&2; return 1 }
|
|
safe[reply]="$1"; shift
|
|
|
|
# First consume and save anything before the argument phrases
|
|
|
|
helpspec=()
|
|
prelude=()
|
|
|
|
while (($#))
|
|
do
|
|
case $1 in
|
|
(argument|help|option) break;;
|
|
(*) prelude=("$prelude[@]" "$1"); shift;;
|
|
esac
|
|
done
|
|
|
|
# Consume all the argument phrases and build the argspec array
|
|
|
|
while (($#))
|
|
do
|
|
amap=()
|
|
dspec=()
|
|
case $1 in
|
|
|
|
# argument [POS] [means MSG] [action ACT]
|
|
(argument)
|
|
shift
|
|
while (($#))
|
|
do
|
|
case $1 in
|
|
(<1->|\*) amap[position]="$1"; shift;;
|
|
(means|action) amap[$1]="$2"; shift 2;;
|
|
(argument|option|help) break;;
|
|
(*) print -R SYNTAX ERROR at "$@" 1>&2; return 1;;
|
|
esac
|
|
done
|
|
if (( $#amap ))
|
|
then
|
|
argspec=("$argspec[@]" "${amap[position]}:${amap[means]}:${amap[action]}")
|
|
fi;;
|
|
|
|
# option OPT [follow HOW] [explain STR] {unless XOR} \
|
|
# {[through PAT] [means MSG] [action ACT]}
|
|
(option)
|
|
amap[option]="$2"; shift 2
|
|
dmap=()
|
|
xor=()
|
|
while (( $# ))
|
|
do
|
|
(( ${+amap[$1]} || ${+dmap[through]} )) && break;
|
|
case $1 in
|
|
(follow)
|
|
amap[follow]="${2:s/join/-/:s/close/-/:s/next//:s/split//:s/loose/+/:s/assign/=/:s/none//}"
|
|
shift 2;;
|
|
(explain) amap[explain]="[$2]" ; shift 2;;
|
|
(unless) xor=("$xor[@]" "${(@)=2}"); shift 2;;
|
|
(through|means|action)
|
|
while (( $# ))
|
|
do
|
|
(( ${+dmap[$1]} )) && break 2
|
|
case $1 in
|
|
(through|means|action) dmap[$1]=":${2}"; shift 2;;
|
|
(argument|option|help|follow|explain|unless) break;;
|
|
(*) print -R SYNTAX ERROR at "$@" 1>&2; return 1;;
|
|
esac
|
|
done;;
|
|
(argument|option|help) break;;
|
|
(*) print -R SYNTAX ERROR at "$@" 1>&2; return 1;;
|
|
esac
|
|
if (( $#dmap ))
|
|
then
|
|
dspec=("$dspec[@]" "${dmap[through]}${dmap[means]:-:}${dmap[action]:-:}")
|
|
fi
|
|
done
|
|
if (( $#amap ))
|
|
then
|
|
argspec=("$argspec[@]" "${xor:+($xor)}${amap[option]}${amap[follow]}${amap[explain]}${dspec}")
|
|
fi;;
|
|
|
|
# help PAT [means MSG] action ACT
|
|
(help)
|
|
amap[pattern]="$2"; shift 2
|
|
while (($#))
|
|
do
|
|
(( ${+amap[$1]} )) && break;
|
|
case $1 in
|
|
(means|action) amap[$1]="$2"; shift 2;;
|
|
(argument|option|help) break;;
|
|
(*) print -R SYNTAX ERROR at "$@" 1>&2; return 1;;
|
|
esac
|
|
done
|
|
if (( $#amap ))
|
|
then
|
|
helpspec=("$helpspec[@]" "${amap[pattern]}:${amap[means]}:${amap[action]}")
|
|
fi;;
|
|
(*) break;;
|
|
esac
|
|
done
|
|
|
|
eval $safe[reply]'=( "${prelude[@]}" "${argspec[@]}" ${helpspec:+"-- ${helpspec[@]}"} "$@" )'
|
|
|
|
# print -R _arguments "${prelude[@]:q}" "${argspec[@]:q}" ${helpspec:+"-- ${helpspec[@]:q}"} "$@:q"
|
|
|
|
return 0
|