source: trip-planner-front/node_modules/dashdash/etc/dashdash.bash_completion.in@ fa375fe

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1#!/bin/bash
2#
3# Bash completion generated for '{{name}}' at {{date}}.
4#
5# The original template lives here:
6# https://github.com/trentm/node-dashdash/blob/master/etc/dashdash.bash_completion.in
7#
8
9#
10# Copyright 2016 Trent Mick
11# Copyright 2016 Joyent, Inc.
12#
13#
14# A generic Bash completion driver script.
15#
16# This is meant to provide a re-usable chunk of Bash to use for
17# "etc/bash_completion.d/" files for individual tools. Only the "Configuration"
18# section with tool-specific info need differ. Features:
19#
20# - support for short and long opts
21# - support for knowing which options take arguments
22# - support for subcommands (e.g. 'git log <TAB>' to show just options for the
23# log subcommand)
24# - does the right thing with "--" to stop options
25# - custom optarg and arg types for custom completions
26# - (TODO) support for shells other than Bash (tcsh, zsh, fish?, etc.)
27#
28#
29# Examples/design:
30#
31# 1. Bash "default" completion. By default Bash's 'complete -o default' is
32# enabled. That means when there are no completions (e.g. if no opts match
33# the current word), then you'll get Bash's default completion. Most notably
34# that means you get filename completion. E.g.:
35# $ tool ./<TAB>
36# $ tool READ<TAB>
37#
38# 2. all opts and subcmds:
39# $ tool <TAB>
40# $ tool -v <TAB> # assuming '-v' doesn't take an arg
41# $ tool -<TAB> # matching opts
42# $ git lo<TAB> # matching subcmds
43#
44# Long opt completions are given *without* the '=', i.e. we prefer space
45# separated because that's easier for good completions.
46#
47# 3. long opt arg with '='
48# $ tool --file=<TAB>
49# $ tool --file=./d<TAB>
50# We maintain the "--file=" prefix. Limitation: With the attached prefix
51# the 'complete -o filenames' doesn't know to do dirname '/' suffixing. Meh.
52#
53# 4. envvars:
54# $ tool $<TAB>
55# $ tool $P<TAB>
56# Limitation: Currently only getting exported vars, so we miss "PS1" and
57# others.
58#
59# 5. Defer to other completion in a subshell:
60# $ tool --file $(cat ./<TAB>
61# We get this from 'complete -o default ...'.
62#
63# 6. Custom completion types from a provided bash function.
64# $ tool --profile <TAB> # complete available "profiles"
65#
66#
67# Dev Notes:
68# - compgen notes, from http://unix.stackexchange.com/questions/151118/understand-compgen-builtin-command
69# - https://www.gnu.org/software/bash/manual/html_node/Programmable-Completion-Builtins.html
70#
71
72
73# Debugging this completion:
74# 1. Uncomment the "_{{name}}_log_file=..." line.
75# 2. 'tail -f /var/tmp/dashdash-completion.log' in one terminal.
76# 3. Re-source this bash completion file.
77#_{{name}}_log=/var/tmp/dashdash-completion.log
78
79function _{{name}}_completer {
80
81 # ---- cmd definition
82
83 {{spec}}
84
85
86 # ---- locals
87
88 declare -a argv
89
90
91 # ---- support functions
92
93 function trace {
94 [[ -n "$_{{name}}_log" ]] && echo "$*" >&2
95 }
96
97 function _dashdash_complete {
98 local idx context
99 idx=$1
100 context=$2
101
102 local shortopts longopts optargs subcmds allsubcmds argtypes
103 shortopts="$(eval "echo \${cmd${context}_shortopts}")"
104 longopts="$(eval "echo \${cmd${context}_longopts}")"
105 optargs="$(eval "echo \${cmd${context}_optargs}")"
106 subcmds="$(eval "echo \${cmd${context}_subcmds}")"
107 allsubcmds="$(eval "echo \${cmd${context}_allsubcmds}")"
108 IFS=', ' read -r -a argtypes <<< "$(eval "echo \${cmd${context}_argtypes}")"
109
110 trace ""
111 trace "_dashdash_complete(idx=$idx, context=$context)"
112 trace " shortopts: $shortopts"
113 trace " longopts: $longopts"
114 trace " optargs: $optargs"
115 trace " subcmds: $subcmds"
116 trace " allsubcmds: $allsubcmds"
117
118 # Get 'state' of option parsing at this COMP_POINT.
119 # Copying "dashdash.js#parse()" behaviour here.
120 local state=
121 local nargs=0
122 local i=$idx
123 local argtype
124 local optname
125 local prefix
126 local word
127 local dashdashseen=
128 while [[ $i -lt $len && $i -le $COMP_CWORD ]]; do
129 argtype=
130 optname=
131 prefix=
132 word=
133
134 arg=${argv[$i]}
135 trace " consider argv[$i]: '$arg'"
136
137 if [[ "$arg" == "--" && $i -lt $COMP_CWORD ]]; then
138 trace " dashdash seen"
139 dashdashseen=yes
140 state=arg
141 word=$arg
142 elif [[ -z "$dashdashseen" && "${arg:0:2}" == "--" ]]; then
143 arg=${arg:2}
144 if [[ "$arg" == *"="* ]]; then
145 optname=${arg%%=*}
146 val=${arg##*=}
147 trace " long opt: optname='$optname' val='$val'"
148 state=arg
149 argtype=$(echo "$optargs" | awk -F "-$optname=" '{print $2}' | cut -d' ' -f1)
150 word=$val
151 prefix="--$optname="
152 else
153 optname=$arg
154 val=
155 trace " long opt: optname='$optname'"
156 state=longopt
157 word=--$optname
158
159 if [[ "$optargs" == *"-$optname="* && $i -lt $COMP_CWORD ]]; then
160 i=$(( $i + 1 ))
161 state=arg
162 argtype=$(echo "$optargs" | awk -F "-$optname=" '{print $2}' | cut -d' ' -f1)
163 word=${argv[$i]}
164 trace " takes arg (consume argv[$i], word='$word')"
165 fi
166 fi
167 elif [[ -z "$dashdashseen" && "${arg:0:1}" == "-" ]]; then
168 trace " short opt group"
169 state=shortopt
170 word=$arg
171
172 local j=1
173 while [[ $j -lt ${#arg} ]]; do
174 optname=${arg:$j:1}
175 trace " consider index $j: optname '$optname'"
176
177 if [[ "$optargs" == *"-$optname="* ]]; then
178 argtype=$(echo "$optargs" | awk -F "-$optname=" '{print $2}' | cut -d' ' -f1)
179 if [[ $(( $j + 1 )) -lt ${#arg} ]]; then
180 state=arg
181 word=${arg:$(( $j + 1 ))}
182 trace " takes arg (rest of this arg, word='$word', argtype='$argtype')"
183 elif [[ $i -lt $COMP_CWORD ]]; then
184 state=arg
185 i=$(( $i + 1 ))
186 word=${argv[$i]}
187 trace " takes arg (word='$word', argtype='$argtype')"
188 fi
189 break
190 fi
191
192 j=$(( $j + 1 ))
193 done
194 elif [[ $i -lt $COMP_CWORD && -n "$arg" ]] && $(echo "$allsubcmds" | grep -w "$arg" >/dev/null); then
195 trace " complete subcmd: recurse _dashdash_complete"
196 _dashdash_complete $(( $i + 1 )) "${context}__${arg/-/_}"
197 return
198 else
199 trace " not an opt or a complete subcmd"
200 state=arg
201 word=$arg
202 nargs=$(( $nargs + 1 ))
203 if [[ ${#argtypes[@]} -gt 0 ]]; then
204 argtype="${argtypes[$(( $nargs - 1 ))]}"
205 if [[ -z "$argtype" ]]; then
206 # If we have more args than argtypes, we use the
207 # last type.
208 argtype="${argtypes[@]: -1:1}"
209 fi
210 fi
211 fi
212
213 trace " state=$state prefix='$prefix' word='$word'"
214 i=$(( $i + 1 ))
215 done
216
217 trace " parsed: state=$state optname='$optname' argtype='$argtype' prefix='$prefix' word='$word' dashdashseen=$dashdashseen"
218 local compgen_opts=
219 if [[ -n "$prefix" ]]; then
220 compgen_opts="$compgen_opts -P $prefix"
221 fi
222
223 case $state in
224 shortopt)
225 compgen $compgen_opts -W "$shortopts $longopts" -- "$word"
226 ;;
227 longopt)
228 compgen $compgen_opts -W "$longopts" -- "$word"
229 ;;
230 arg)
231 # If we don't know what completion to do, then emit nothing. We
232 # expect that we are running with:
233 # complete -o default ...
234 # where "default" means: "Use Readline's default completion if
235 # the compspec generates no matches." This gives us the good filename
236 # completion, completion in subshells/backticks.
237 #
238 # We cannot support an argtype="directory" because
239 # compgen -S '/' -A directory -- "$word"
240 # doesn't give a satisfying result. It doesn't stop at the trailing '/'
241 # so you cannot descend into dirs.
242 if [[ "${word:0:1}" == '$' ]]; then
243 # By default, Bash will complete '$<TAB>' to all envvars. Apparently
244 # 'complete -o default' does *not* give us that. The following
245 # gets *close* to the same completions: '-A export' misses envvars
246 # like "PS1".
247 trace " completing envvars"
248 compgen $compgen_opts -P '$' -A export -- "${word:1}"
249 elif [[ -z "$argtype" ]]; then
250 # Only include opts in completions if $word is not empty.
251 # This is to avoid completing the leading '-', which foils
252 # using 'default' completion.
253 if [[ -n "$dashdashseen" ]]; then
254 trace " completing subcmds, if any (no argtype, dashdash seen)"
255 compgen $compgen_opts -W "$subcmds" -- "$word"
256 elif [[ -z "$word" ]]; then
257 trace " completing subcmds, if any (no argtype, empty word)"
258 compgen $compgen_opts -W "$subcmds" -- "$word"
259 else
260 trace " completing opts & subcmds (no argtype)"
261 compgen $compgen_opts -W "$shortopts $longopts $subcmds" -- "$word"
262 fi
263 elif [[ $argtype == "none" ]]; then
264 # We want *no* completions, i.e. some way to get the active
265 # 'complete -o default' to not do filename completion.
266 trace " completing 'none' (hack to imply no completions)"
267 echo "##-no-completion- -results-##"
268 elif [[ $argtype == "file" ]]; then
269 # 'complete -o default' gives the best filename completion, at least
270 # on Mac.
271 trace " completing 'file' (let 'complete -o default' handle it)"
272 echo ""
273 elif ! type complete_$argtype 2>/dev/null >/dev/null; then
274 trace " completing '$argtype' (fallback to default b/c complete_$argtype is unknown)"
275 echo ""
276 else
277 trace " completing custom '$argtype'"
278 completions=$(complete_$argtype "$word")
279 if [[ -z "$completions" ]]; then
280 trace " no custom '$argtype' completions"
281 # These are in ascii and "dictionary" order so they sort
282 # correctly.
283 echo "##-no-completion- -results-##"
284 else
285 echo $completions
286 fi
287 fi
288 ;;
289 *)
290 trace " unknown state: $state"
291 ;;
292 esac
293 }
294
295
296 trace ""
297 trace "-- $(date)"
298 #trace "\$IFS: '$IFS'"
299 #trace "\$@: '$@'"
300 #trace "COMP_WORDBREAKS: '$COMP_WORDBREAKS'"
301 trace "COMP_CWORD: '$COMP_CWORD'"
302 trace "COMP_LINE: '$COMP_LINE'"
303 trace "COMP_POINT: $COMP_POINT"
304
305 # Guard against negative COMP_CWORD. This is a Bash bug at least on
306 # Mac 10.10.4's bash. See
307 # <https://lists.gnu.org/archive/html/bug-bash/2009-07/msg00125.html>.
308 if [[ $COMP_CWORD -lt 0 ]]; then
309 trace "abort on negative COMP_CWORD"
310 exit 1;
311 fi
312
313 # I don't know how to do array manip on argv vars,
314 # so copy over to argv array to work on them.
315 shift # the leading '--'
316 i=0
317 len=$#
318 while [[ $# -gt 0 ]]; do
319 argv[$i]=$1
320 shift;
321 i=$(( $i + 1 ))
322 done
323 trace "argv: '${argv[@]}'"
324 trace "argv[COMP_CWORD-1]: '${argv[$(( $COMP_CWORD - 1 ))]}'"
325 trace "argv[COMP_CWORD]: '${argv[$COMP_CWORD]}'"
326 trace "argv len: '$len'"
327
328 _dashdash_complete 1 ""
329}
330
331
332# ---- mainline
333
334# Note: This if-block to help work with 'compdef' and 'compctl' is
335# adapted from 'npm completion'.
336if type complete &>/dev/null; then
337 function _{{name}}_completion {
338 local _log_file=/dev/null
339 [[ -z "$_{{name}}_log" ]] || _log_file="$_{{name}}_log"
340 COMPREPLY=($(COMP_CWORD="$COMP_CWORD" \
341 COMP_LINE="$COMP_LINE" \
342 COMP_POINT="$COMP_POINT" \
343 _{{name}}_completer -- "${COMP_WORDS[@]}" \
344 2>$_log_file)) || return $?
345 }
346 complete -o default -F _{{name}}_completion {{name}}
347elif type compdef &>/dev/null; then
348 function _{{name}}_completion {
349 local _log_file=/dev/null
350 [[ -z "$_{{name}}_log" ]] || _log_file="$_{{name}}_log"
351 compadd -- $(COMP_CWORD=$((CURRENT-1)) \
352 COMP_LINE=$BUFFER \
353 COMP_POINT=0 \
354 _{{name}}_completer -- "${words[@]}" \
355 2>$_log_file)
356 }
357 compdef _{{name}}_completion {{name}}
358elif type compctl &>/dev/null; then
359 function _{{name}}_completion {
360 local cword line point words si
361 read -Ac words
362 read -cn cword
363 let cword-=1
364 read -l line
365 read -ln point
366 local _log_file=/dev/null
367 [[ -z "$_{{name}}_log" ]] || _log_file="$_{{name}}_log"
368 reply=($(COMP_CWORD="$cword" \
369 COMP_LINE="$line" \
370 COMP_POINT="$point" \
371 _{{name}}_completer -- "${words[@]}" \
372 2>$_log_file)) || return $?
373 }
374 compctl -K _{{name}}_completion {{name}}
375fi
376
377
378##
379## This is a Bash completion file for the '{{name}}' command. You can install
380## with either:
381##
382## cp FILE /usr/local/etc/bash_completion.d/{{name}} # Mac
383## cp FILE /etc/bash_completion.d/{{name}} # Linux
384##
385## or:
386##
387## cp FILE > ~/.{{name}}.completion
388## echo "source ~/.{{name}}.completion" >> ~/.bashrc
389##
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