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sh-setup: add new peel_committish() helper

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The normal way to check whether a certain revision resolves to a valid
commit is:

  $ git rev-parse --verify $REV^0

Unfortunately, this does not work when $REV is of the type :/quuxery.
Write a helper to work around this limitation.

Suggested-by: Junio C Hamano <gitster@pobox.com>
Signed-off-by: Ramkumar Ramachandra <artagnon@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Ramkumar Ramachandra 2013-06-14 18:47:51 +05:30 committed by Junio C Hamano
parent 6567dc05a3
commit bac1ddd0f8
1 changed files with 12 additions and 0 deletions
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12
git-sh-setup.sh
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@ -313,3 +313,15 @@ then
} }
: ${GIT_OBJECT_DIRECTORY="$GIT_DIR/objects"} : ${GIT_OBJECT_DIRECTORY="$GIT_DIR/objects"}
fi fi
peel_committish () {
case "$1" in
:/*)
peeltmp=$(git rev-parse --verify "$1") &&
git rev-parse --verify "${peeltmp}^0"
;;
*)
git rev-parse --verify "${1}^0"
;;
esac
}