perf completion: Use more comp words

The completion words $words and $cword are available, so we might as
well use them instead of directly accessing COMP_WORDS.

Signed-off-by: Ramkumar Ramachandra <artagnon@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Link: http://lkml.kernel.org/r/1372941691-14684-8-git-send-email-artagnon@gmail.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

diff --git a/tools/perf/bash_completion b/tools/perf/bash_completion
index ee9c6d8..62e157d 100644 (file)
--- a/tools/perf/bash_completion
+++ b/tools/perf/bash_completion
@@ -92,15 +92,15 @@ __ltrim_colon_completions()
 type perf &>/dev/null &&
 _perf()
 {
-       local cur prev cmd
+       local cur words cword prev cmd
 
        COMPREPLY=()
-       _get_comp_words_by_ref -n : cur prev
+       _get_comp_words_by_ref -n =: cur words cword prev
 
-       cmd=${COMP_WORDS[0]}
+       cmd=${words[0]}
 
        # List perf subcommands or long options
-       if [ $COMP_CWORD -eq 1 ]; then
+       if [ $cword -eq 1 ]; then
                if [[ $cur == --* ]]; then
                        COMPREPLY=( $( compgen -W '--help --version \
                        --exec-path --html-path --paginate --no-pager \
@@ -110,13 +110,13 @@ _perf()
                        COMPREPLY=( $( compgen -W '$cmds' -- "$cur" ) )
                fi
        # List possible events for -e option
-       elif [[ $prev == "-e" && "${COMP_WORDS[1]}" == @(record|stat|top) ]]; then
+       elif [[ $prev == "-e" && "${words[1]}" == @(record|stat|top) ]]; then
                evts=$($cmd list --raw-dump)
                COMPREPLY=( $( compgen -W '$evts' -- "$cur" ) )
                __ltrim_colon_completions $cur
        # List long option names
        elif [[ $cur == --* ]];  then
-               subcmd=${COMP_WORDS[1]}
+               subcmd=${words[1]}
                opts=$($cmd $subcmd --list-opts)
                COMPREPLY=( $( compgen -W '$opts' -- "$cur" ) )
        fi