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Subject[PATCH 1/3] perf tools: Check existence of _get_comp_words_by_ref when bash completing
Date
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.

Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: David Ahern <dsahern@gmail.com>
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
---
tools/perf/bash_completion | 15 +++++++++++++--
1 file changed, 13 insertions(+), 2 deletions(-)

diff --git a/tools/perf/bash_completion b/tools/perf/bash_completion
index 1958fa539d0f..3d48cee1b5e5 100644
--- a/tools/perf/bash_completion
+++ b/tools/perf/bash_completion
@@ -1,12 +1,23 @@
# perf completion

+function_exists()
+{
+ declare -F $1 > /dev/null
+ return $?
+}
+
have perf &&
_perf()
{
- local cur cmd
+ local cur prev cmd

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]}

--
1.7.9.2


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