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#!/bin/sh
##
## applypatch takes four file arguments, and uses those to
## apply the unpacked patch (surprise surprise) that they
## represent to the current tree.
##
## The arguments are:
## $1 - file with commit message
## $2 - file with the actual patch
## $3 - "info" file with Author, email and subject
## $4 - optional file containing signoff to add
##
USAGE='<msg> <patch> <info> [<signoff>]'
. git-sh-setup
case "$#" in 3|4) ;; *) usage ;; esac
final=.dotest/final-commit
##
## If this file exists, we ask before applying
##
query_apply=.dotest/.query_apply
## We do not munge the first line of the commit message too much
## if this file exists.
keep_subject=.dotest/.keep_subject
## We do not attempt the 3-way merge fallback unless this file exists.
fall_back_3way=.dotest/.3way
MSGFILE=$1
PATCHFILE=$2
INFO=$3
SIGNOFF=$4
EDIT=${VISUAL:-${EDITOR:-vi}}
export GIT_AUTHOR_NAME="$(sed -n '/^Author/ s/Author: //p' "$INFO")"
export GIT_AUTHOR_EMAIL="$(sed -n '/^Email/ s/Email: //p' "$INFO")"
export GIT_AUTHOR_DATE="$(sed -n '/^Date/ s/Date: //p' "$INFO")"
export SUBJECT="$(sed -n '/^Subject/ s/Subject: //p' "$INFO")"
if test '' != "$SIGNOFF"
then
if test -f "$SIGNOFF"
then
SIGNOFF=`cat "$SIGNOFF"` || exit
elif case "$SIGNOFF" in yes | true | me | please) : ;; *) false ;; esac
then
SIGNOFF=`git-var GIT_COMMITTER_IDENT | sed -e '
s/>.*/>/
s/^/Signed-off-by: /'
`
else
SIGNOFF=
fi
if test '' != "$SIGNOFF"
then
LAST_SIGNED_OFF_BY=`
sed -ne '/^Signed-off-by: /p' "$MSGFILE" |
tail -n 1
`
test "$LAST_SIGNED_OFF_BY" = "$SIGNOFF" || {
test '' = "$LAST_SIGNED_OFF_BY" && echo
echo "$SIGNOFF"
} >>"$MSGFILE"
fi
fi
patch_header=
test -f "$keep_subject" || patch_header='[PATCH] '
{
echo "$patch_header$SUBJECT"
if test -s "$MSGFILE"
then
echo
cat "$MSGFILE"
fi
} >"$final"
interactive=yes
test -f "$query_apply" || interactive=no
while [ "$interactive" = yes ]; do
echo "Commit Body is:"
echo "--------------------------"
cat "$final"
echo "--------------------------"
printf "Apply? [y]es/[n]o/[e]dit/[a]ccept all "
read reply
case "$reply" in
y|Y) interactive=no;;
n|N) exit 2;; # special value to tell dotest to keep going
e|E) "$EDIT" "$final";;
a|A) rm -f "$query_apply"
interactive=no ;;
esac
done
if test -x "$GIT_DIR"/hooks/applypatch-msg
then
"$GIT_DIR"/hooks/applypatch-msg "$final" || exit
fi
echo
echo Applying "'$SUBJECT'"
echo
git-apply --index "$PATCHFILE" || {
# git-apply exits with status 1 when the patch does not apply,
# but it die()s with other failures, most notably upon corrupt
# patch. In the latter case, there is no point to try applying
# it to another tree and do 3-way merge.
test $? = 1 || exit 1
test -f "$fall_back_3way" || exit 1
# Here if we know which revision the patch applies to,
# we create a temporary working tree and index, apply the
# patch, and attempt 3-way merge with the resulting tree.
O_OBJECT=`cd "$GIT_OBJECT_DIRECTORY" && pwd`
rm -fr .patch-merge-*
if git-apply -z --index-info "$PATCHFILE" \
>.patch-merge-index-info 2>/dev/null &&
GIT_INDEX_FILE=.patch-merge-tmp-index \
git-update-index -z --index-info <.patch-merge-index-info &&
GIT_INDEX_FILE=.patch-merge-tmp-index \
git-write-tree >.patch-merge-tmp-base &&
(
mkdir .patch-merge-tmp-dir &&
cd .patch-merge-tmp-dir &&
GIT_INDEX_FILE="../.patch-merge-tmp-index" \
GIT_OBJECT_DIRECTORY="$O_OBJECT" \
git-apply $binary --index
) <"$PATCHFILE"
then
echo Using index info to reconstruct a base tree...
mv .patch-merge-tmp-base .patch-merge-base
mv .patch-merge-tmp-index .patch-merge-index
else
(
N=10
# Otherwise, try nearby trees that can be used to apply the
# patch.
git-rev-list --max-count=$N HEAD
# or hoping the patch is against known tags...
git-ls-remote --tags .
) |
while read base junk
do
# Try it if we have it as a tree.
git-cat-file tree "$base" >/dev/null 2>&1 || continue
rm -fr .patch-merge-tmp-* &&
mkdir .patch-merge-tmp-dir || break
(
cd .patch-merge-tmp-dir &&
GIT_INDEX_FILE=../.patch-merge-tmp-index &&
GIT_OBJECT_DIRECTORY="$O_OBJECT" &&
export GIT_INDEX_FILE GIT_OBJECT_DIRECTORY &&
git-read-tree "$base" &&
git-apply --index &&
mv ../.patch-merge-tmp-index ../.patch-merge-index &&
echo "$base" >../.patch-merge-base
) <"$PATCHFILE" 2>/dev/null && break
done
fi
test -f .patch-merge-index &&
his_tree=$(GIT_INDEX_FILE=.patch-merge-index git-write-tree) &&
orig_tree=$(cat .patch-merge-base) &&
rm -fr .patch-merge-* || exit 1
echo Falling back to patching base and 3-way merge using $orig_tree...
# This is not so wrong. Depending on which base we picked,
# orig_tree may be wildly different from ours, but his_tree
# has the same set of wildly different changes in parts the
# patch did not touch, so resolve ends up cancelling them,
# saying that we reverted all those changes.
if git-merge-resolve $orig_tree -- HEAD $his_tree
then
echo Done.
else
echo Failed to merge in the changes.
exit 1
fi
}
if test -x "$GIT_DIR"/hooks/pre-applypatch
then
"$GIT_DIR"/hooks/pre-applypatch || exit
fi
tree=$(git-write-tree) || exit 1
echo Wrote tree $tree
parent=$(git-rev-parse --verify HEAD) &&
commit=$(git-commit-tree $tree -p $parent <"$final") || exit 1
echo Committed: $commit
git-update-ref HEAD $commit $parent || exit
if test -x "$GIT_DIR"/hooks/post-applypatch
then
"$GIT_DIR"/hooks/post-applypatch
fi
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