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git-am: give better diagnostics when the patch does not apply during --3way

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If the user tries to apply a patch that was hand-edited in such
a way that it does not apply to the original file recorded on
its "index" line anymore, we did detect the situation but did
not issue an error message that is specific enough.

Signed-off-by: Junio C Hamano <junkio@cox.net>
This commit is contained in:
Junio C Hamano 2006-08-12 16:16:47 -07:00
parent 022f25e8d4
commit fd7bcfb524
1 changed files with 19 additions and 9 deletions
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28
git-am.sh
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@ -45,6 +45,12 @@ go_next () {
this=$next
}
cannot_fallback () {
echo "$1"
echo "Cannot fall back to three-way merge."
exit 1
}
fall_back_3way () {
O_OBJECT=`cd "$GIT_OBJECT_DIRECTORY" && pwd`
@ -52,19 +58,23 @@ fall_back_3way () {
mkdir "$dotest/patch-merge-tmp-dir"
# First see if the patch records the index info that we can use.
if git-apply -z --index-info "$dotest/patch" \
>"$dotest/patch-merge-index-info" 2>/dev/null &&
GIT_INDEX_FILE="$dotest/patch-merge-tmp-index" \
git-update-index -z --index-info <"$dotest/patch-merge-index-info" &&
GIT_INDEX_FILE="$dotest/patch-merge-tmp-index" \
git-write-tree >"$dotest/patch-merge-base+" &&
# index has the base tree now.
GIT_INDEX_FILE="$dotest/patch-merge-tmp-index" \
git-apply -z --index-info "$dotest/patch" \
>"$dotest/patch-merge-index-info" &&
GIT_INDEX_FILE="$dotest/patch-merge-tmp-index" \
git-update-index -z --index-info <"$dotest/patch-merge-index-info" &&
GIT_INDEX_FILE="$dotest/patch-merge-tmp-index" \
git-write-tree >"$dotest/patch-merge-base+" ||
cannot_fallback "Patch does not record usable index information."
echo Using index info to reconstruct a base tree...
if GIT_INDEX_FILE="$dotest/patch-merge-tmp-index" \
git-apply $binary --cached <"$dotest/patch"
then
echo Using index info to reconstruct a base tree...
mv "$dotest/patch-merge-base+" "$dotest/patch-merge-base"
mv "$dotest/patch-merge-tmp-index" "$dotest/patch-merge-index"
else
cannot_fallback "Did you hand edit your patch?
It does not apply to blobs recorded in its index."
fi
test -f "$dotest/patch-merge-index" &&