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devtools: check for supported git version

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The script devtools/parse-flow-support.sh uses the git-grep
option (-o, --only-matching), which is only supported from
git version 2.19 and onwards.[1]

The script now exits early providing a clear message to the user
about the required git version instead of showing the following
error messages multiple times:
  error: unknown switch `o'
  usage: git grep [<options>] [-e] <pattern> [<rev>...] [[--] <path>...]
  [..]

[1] https://github.com/git/git/blob/v2.19.0/Documentation/RelNotes/2.19.0.txt

Signed-off-by: Ali Alnubani <alialnu@nvidia.com>
Signed-off-by: Thomas Monjalon <thomas@monjalon.net>
Tested-by: Chaoyong He <chaoyong.he@corigine.com>
This commit is contained in:
Ali Alnubani 2022-10-25 13:15:12 +03:00 committed by Thomas Monjalon
parent 0b9db7caa8
commit a70c98f4dd
1 changed files with 6 additions and 0 deletions
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6
devtools/parse-flow-support.sh
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@ -13,6 +13,12 @@ if [ -z "$dir" ]; then
exit 1
fi
# test git-grep for -o (--only-matching) option
if ! git grep -qo git -- $0 >/dev/null 2>&1; then
echo "git version >= 2.19 is required" >&2
exit 1
fi
# sorting order
export LC_COLLATE=C