tools/perf/perf-completion.sh

   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.
  53 preload_get_comp_words_by_ref="true"
  54
  55 if [ $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"
  58 fi
  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.
  90 preload__ltrim_colon_completions="true"
  91
  92 if [ $preload__ltrim_colon_completions = "true" ]; then
  93         type __ltrim_colon_completions &>/dev/null ||
  94         preload__ltrim_colon_completions="false"
  95 fi
  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
 185 if [[ -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
 244 fi
 245
 246 type 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
 258 complete -o bashdefault -o default -o nospace -F _perf perf 2>/dev/null \
 259         || complete -o default -o nospace -F _perf perf