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perf tools: Check existence of _get_comp_words_by_ref when bash completing

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The '_get_comp_words_by_ref' function is available from the bash
completion v1.2 so that earlier version emits following warning:

  $ perf re<TAB>_get_comp_words_by_ref: command not found

Use older '_get_cword' method when the above function doesn't exist.

Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Acked-by: Frederic Weisbecker <fweisbec@gmail.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/1349191294-6926-2-git-send-email-namhyung@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Namhyung Kim 2012-10-03 00:21:32 +09:00 committed by Arnaldo Carvalho de Melo
parent 002439e84e
commit a1d668c3ff
1 changed files with 13 additions and 2 deletions
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15
tools/perf/bash_completion
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@ -1,12 +1,23 @@
# perf completion # perf completion
function_exists()
{
declare -F $1 > /dev/null
return $?
}
have perf && have perf &&
_perf() _perf()
{ {
local cur cmd local cur prev cmd
COMPREPLY=() COMPREPLY=()
_get_comp_words_by_ref cur prev if function_exists _get_comp_words_by_ref; then
_get_comp_words_by_ref cur prev
else
cur=$(_get_cword)
prev=${COMP_WORDS[COMP_CWORD-1]}
fi
cmd=${COMP_WORDS[0]} cmd=${COMP_WORDS[0]}