xref: /openbmc/linux/tools/perf/perf-completion.sh (revision 65417d9f) 
1# perf bash and zsh completion
2# SPDX-License-Identifier: GPL-2.0
3
4# Taken from git.git's completion script.
5__my_reassemble_comp_words_by_ref()
6{
7	local exclude i j first
8	# Which word separators to exclude?
9	exclude="${1//[^$COMP_WORDBREAKS]}"
10	cword_=$COMP_CWORD
11	if [ -z "$exclude" ]; then
12		words_=("${COMP_WORDS[@]}")
13		return
14	fi
15	# List of word completion separators has shrunk;
16	# re-assemble words to complete.
17	for ((i=0, j=0; i < ${#COMP_WORDS[@]}; i++, j++)); do
18		# Append each nonempty word consisting of just
19		# word separator characters to the current word.
20		first=t
21		while
22			[ $i -gt 0 ] &&
23			[ -n "${COMP_WORDS[$i]}" ] &&
24			# word consists of excluded word separators
25			[ "${COMP_WORDS[$i]//[^$exclude]}" = "${COMP_WORDS[$i]}" ]
26		do
27			# Attach to the previous token,
28			# unless the previous token is the command name.
29			if [ $j -ge 2 ] && [ -n "$first" ]; then
30				((j--))
31			fi
32			first=
33			words_[$j]=${words_[j]}${COMP_WORDS[i]}
34			if [ $i = $COMP_CWORD ]; then
35				cword_=$j
36			fi
37			if (($i < ${#COMP_WORDS[@]} - 1)); then
38				((i++))
39			else
40				# Done.
41				return
42			fi
43		done
44		words_[$j]=${words_[j]}${COMP_WORDS[i]}
45		if [ $i = $COMP_CWORD ]; then
46			cword_=$j
47		fi
48	done
49}
50
51# Define preload_get_comp_words_by_ref="false", if the function
52# __perf_get_comp_words_by_ref() is required instead.
53preload_get_comp_words_by_ref="true"
54
55if [ $preload_get_comp_words_by_ref = "true" ]; then
56	type _get_comp_words_by_ref &>/dev/null ||
57	preload_get_comp_words_by_ref="false"
58fi
59[ $preload_get_comp_words_by_ref = "true" ] ||
60__perf_get_comp_words_by_ref()
61{
62	local exclude cur_ words_ cword_
63	if [ "$1" = "-n" ]; then
64		exclude=$2
65		shift 2
66	fi
67	__my_reassemble_comp_words_by_ref "$exclude"
68	cur_=${words_[cword_]}
69	while [ $# -gt 0 ]; do
70		case "$1" in
71		cur)
72			cur=$cur_
73			;;
74		prev)
75			prev=${words_[$cword_-1]}
76			;;
77		words)
78			words=("${words_[@]}")
79			;;
80		cword)
81			cword=$cword_
82			;;
83		esac
84		shift
85	done
86}
87
88# Define preload__ltrim_colon_completions="false", if the function
89# __perf__ltrim_colon_completions() is required instead.
90preload__ltrim_colon_completions="true"
91
92if [ $preload__ltrim_colon_completions = "true" ]; then
93	type __ltrim_colon_completions &>/dev/null ||
94	preload__ltrim_colon_completions="false"
95fi
96[ $preload__ltrim_colon_completions = "true" ] ||
97__perf__ltrim_colon_completions()
98{
99	if [[ "$1" == *:* && "$COMP_WORDBREAKS" == *:* ]]; then
100		# Remove colon-word prefix from COMPREPLY items
101		local colon_word=${1%"${1##*:}"}
102		local i=${#COMPREPLY[*]}
103		while [[ $((--i)) -ge 0 ]]; do
104			COMPREPLY[$i]=${COMPREPLY[$i]#"$colon_word"}
105		done
106	fi
107}
108
109__perfcomp ()
110{
111	COMPREPLY=( $( compgen -W "$1" -- "$2" ) )
112}
113
114__perfcomp_colon ()
115{
116	__perfcomp "$1" "$2"
117	if [ $preload__ltrim_colon_completions = "true" ]; then
118		__ltrim_colon_completions $cur
119	else
120		__perf__ltrim_colon_completions $cur
121	fi
122}
123
124__perf_prev_skip_opts ()
125{
126	local i cmd_ cmds_
127
128	let i=cword-1
129	cmds_=$($cmd $1 --list-cmds)
130	prev_skip_opts=()
131	while [ $i -ge 0 ]; do
132		if [[ ${words[i]} == $1 ]]; then
133			return
134		fi
135		for cmd_ in $cmds_; do
136			if [[ ${words[i]} == $cmd_ ]]; then
137				prev_skip_opts=${words[i]}
138				return
139			fi
140		done
141		((i--))
142	done
143}
144
145__perf_main ()
146{
147	local cmd
148
149	cmd=${words[0]}
150	COMPREPLY=()
151
152	# Skip options backward and find the last perf command
153	__perf_prev_skip_opts
154	# List perf subcommands or long options
155	if [ -z $prev_skip_opts ]; then
156		if [[ $cur == --* ]]; then
157			cmds=$($cmd --list-opts)
158		else
159			cmds=$($cmd --list-cmds)
160		fi
161		__perfcomp "$cmds" "$cur"
162	# List possible events for -e option
163	elif [[ $prev == @("-e"|"--event") &&
164		$prev_skip_opts == @(record|stat|top) ]]; then
165		evts=$($cmd list --raw-dump)
166		__perfcomp_colon "$evts" "$cur"
167	else
168		# List subcommands for perf commands
169		if [[ $prev_skip_opts == @(kvm|kmem|mem|lock|sched|
170			|data|help|script|test|timechart|trace) ]]; then
171			subcmds=$($cmd $prev_skip_opts --list-cmds)
172			__perfcomp_colon "$subcmds" "$cur"
173		fi
174		# List long option names
175		if [[ $cur == --* ]];  then
176			subcmd=$prev_skip_opts
177			__perf_prev_skip_opts $subcmd
178			subcmd=$subcmd" "$prev_skip_opts
179			opts=$($cmd $subcmd --list-opts)
180			__perfcomp "$opts" "$cur"
181		fi
182	fi
183}
184
185if [[ -n ${ZSH_VERSION-} ]]; then
186	autoload -U +X compinit && compinit
187
188	__perfcomp ()
189	{
190		emulate -L zsh
191
192		local c IFS=$' \t\n'
193		local -a array
194
195		for c in ${=1}; do
196			case $c in
197			--*=*|*.) ;;
198			*) c="$c " ;;
199			esac
200			array[${#array[@]}+1]="$c"
201		done
202
203		compset -P '*[=:]'
204		compadd -Q -S '' -a -- array && _ret=0
205	}
206
207	__perfcomp_colon ()
208	{
209		emulate -L zsh
210
211		local cur_="${2-$cur}"
212		local c IFS=$' \t\n'
213		local -a array
214
215		if [[ "$cur_" == *:* ]]; then
216			local colon_word=${cur_%"${cur_##*:}"}
217		fi
218
219		for c in ${=1}; do
220			case $c in
221			--*=*|*.) ;;
222			*) c="$c " ;;
223			esac
224			array[$#array+1]=${c#"$colon_word"}
225		done
226
227		compset -P '*[=:]'
228		compadd -Q -S '' -a -- array && _ret=0
229	}
230
231	_perf ()
232	{
233		local _ret=1 cur cword prev
234		cur=${words[CURRENT]}
235		prev=${words[CURRENT-1]}
236		let cword=CURRENT-1
237		emulate ksh -c __perf_main
238		let _ret && _default && _ret=0
239		return _ret
240	}
241
242	compdef _perf perf
243	return
244fi
245
246type perf &>/dev/null &&
247_perf()
248{
249	local cur words cword prev
250	if [ $preload_get_comp_words_by_ref = "true" ]; then
251		_get_comp_words_by_ref -n =: cur words cword prev
252	else
253		__perf_get_comp_words_by_ref -n =: cur words cword prev
254	fi
255	__perf_main
256} &&
257
258complete -o bashdefault -o default -o nospace -F _perf perf 2>/dev/null \
259	|| complete -o default -o nospace -F _perf perf
260