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-rwxr-xr-xgit-am.sh337
1 files changed, 337 insertions, 0 deletions
diff --git a/git-am.sh b/git-am.sh
new file mode 100755
index 0000000..9e41e70
--- /dev/null
+++ b/git-am.sh
@@ -0,0 +1,337 @@
+#!/bin/sh
+#
+#
+. git-sh-setup || die "Not a git archive"
+
+files=$(git-diff-index --cached --name-only HEAD) || exit
+if [ "$files" ]; then
+ echo "Dirty index: cannot apply patches (dirty: $files)" >&2
+ exit 1
+fi
+
+usage () {
+ echo >&2 "usage: $0 [--signoff] [--dotest=<dir>] [--utf8] [--3way] <mbox>"
+ echo >&2 " or, when resuming"
+ echo >&2 " $0 [--skip]"
+ exit 1;
+}
+
+stop_here () {
+ echo "$1" >"$dotest/next"
+ exit 1
+}
+
+go_next () {
+ rm -f "$dotest/$msgnum" "$dotest/msg" "$dotest/msg-clean" \
+ "$dotest/patch" "$dotest/info"
+ echo "$next" >"$dotest/next"
+ this=$next
+}
+
+fall_back_3way () {
+ O_OBJECT=`cd "$GIT_OBJECT_DIRECTORY" && pwd`
+
+ rm -fr "$dotest"/patch-merge-*
+ mkdir "$dotest/patch-merge-tmp-dir"
+
+ # First see if the patch records the index info that we can use.
+ if git-apply --show-index-info "$dotest/patch" \
+ >"$dotest/patch-merge-index-info" 2>/dev/null &&
+ GIT_INDEX_FILE="$dotest/patch-merge-tmp-index" \
+ git-update-index --index-info <"$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.
+ (
+ cd "$dotest/patch-merge-tmp-dir" &&
+ GIT_INDEX_FILE="../patch-merge-tmp-index" \
+ GIT_OBJECT_DIRECTORY="$O_OBJECT" \
+ git-apply --index <../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
+ # Otherwise, try nearby trees that can be used to apply the
+ # patch.
+ (
+ N=10
+
+ # Hoping the patch is against our recent commits...
+ git-rev-list --max-count=$N HEAD
+
+ # or hoping the patch is against known tags...
+ git-ls-remote --tags .
+ ) |
+ while read base junk
+ do
+ # See if we have it as a tree...
+ git-cat-file tree "$base" >/dev/null 2>&1 || continue
+
+ rm -fr "$dotest"/patch-merge-* &&
+ mkdir "$dotest/patch-merge-tmp-dir" || break
+ (
+ cd "$dotest/patch-merge-tmp-dir" &&
+ GIT_INDEX_FILE=../patch-merge-tmp-index &&
+ GIT_OBJECT_DIRECTORY="$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
+ ) <"$dotest/patch" 2>/dev/null && break
+ done
+ fi
+
+ test -f "$dotest/patch-merge-index" &&
+ his_tree=$(GIT_INDEX_FILE="$dotest/patch-merge-index" git-write-tree) &&
+ orig_tree=$(cat "$dotest/patch-merge-base") &&
+ rm -fr "$dotest"/patch-merge-* || exit 1
+
+ echo Falling back to patching base and 3-way merge...
+
+ # 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.
+
+ git-merge-resolve $orig_tree -- HEAD $his_tree || {
+ echo Failed to merge in the changes.
+ exit 1
+ }
+}
+
+prec=4
+dotest=.dotest sign= utf8= keep= skip= interactive=
+
+while case "$#" in 0) break;; esac
+do
+ case "$1" in
+ -d=*|--d=*|--do=*|--dot=*|--dote=*|--dotes=*|--dotest=*)
+ dotest=`expr "$1" : '-[^=]*=\(.*\)'`; shift ;;
+ -d|--d|--do|--dot|--dote|--dotes|--dotest)
+ case "$#" in 1) usage ;; esac; shift
+ dotest="$1"; shift;;
+
+ -i|--i|--in|--int|--inte|--inter|--intera|--interac|--interact|\
+ --interacti|--interactiv|--interactive)
+ interactive=t; shift ;;
+
+ -3|--3|--3w|--3wa|--3way)
+ threeway=t; shift ;;
+ -s|--s|--si|--sig|--sign|--signo|--signof|--signoff)
+ sign=t; shift ;;
+ -u|--u|--ut|--utf|--utf8)
+ utf8=t; shift ;;
+ -k|--k|--ke|--kee|--keep)
+ keep=t; shift ;;
+
+ --sk|--ski|--skip)
+ skip=t; shift ;;
+
+ --)
+ shift; break ;;
+ -*)
+ usage ;;
+ *)
+ break ;;
+ esac
+done
+
+if test -d "$dotest" &&
+ last=$(cat "$dotest/last") &&
+ next=$(cat "$dotest/next") &&
+ test $# != 0 &&
+ test "$next" -gt "$last"
+then
+ rm -fr "$dotest"
+fi
+
+if test -d "$dotest"
+then
+ test ",$#," = ",0," ||
+ die "previous dotest directory $dotest still exists but mbox given."
+else
+ # Make sure we are not given --skip
+ test ",$skip," = ,, ||
+ die "we are not resuming."
+
+ # Start afresh.
+ mkdir -p "$dotest" || exit
+
+ # cat does the right thing for us, including '-' to mean
+ # standard input.
+ cat "$@" |
+ git-mailsplit -d$prec "$dotest/" >"$dotest/last" || {
+ rm -fr "$dotest"
+ exit 1
+ }
+
+ echo "$sign" >"$dotest/sign"
+ echo "$utf8" >"$dotest/utf8"
+ echo "$keep" >"$dotest/keep"
+ echo "$threeway" >"$dotest/3way"
+ echo 1 >"$dotest/next"
+fi
+
+if test "$(cat "$dotest/utf8")" = t
+then
+ utf8=-u
+fi
+if test "$(cat "$dotest/keep")" = t
+then
+ keep=-k
+fi
+if test "$(cat "$dotest/sign")" = t
+then
+ SIGNOFF=`git-var GIT_COMMITTER_IDENT | sed -e '
+ s/>.*/>/
+ s/^/Signed-off-by: /'
+ `
+else
+ SIGNOFF=
+fi
+threeway=$(cat "$dotest/3way")
+
+last=`cat "$dotest/last"`
+this=`cat "$dotest/next"`
+if test "$skip" = t
+then
+ this=`expr "$this" + 1`
+fi
+
+if test "$this" -gt "$last"
+then
+ echo Nothing to do.
+ rm -fr "$dotest"
+ exit
+fi
+
+while test "$this" -le "$last"
+do
+ msgnum=`printf "%0${prec}d" $this`
+ next=`expr "$this" + 1`
+ test -f "$dotest/$msgnum" || {
+ go_next
+ continue
+ }
+ git-mailinfo $keep $utf8 "$dotest/msg" "$dotest/patch" \
+ <"$dotest/$msgnum" >"$dotest/info" ||
+ stop_here $this
+ git-stripspace < "$dotest/msg" > "$dotest/msg-clean"
+
+ GIT_AUTHOR_NAME="$(sed -n '/^Author/ s/Author: //p' "$dotest/info")"
+ GIT_AUTHOR_EMAIL="$(sed -n '/^Email/ s/Email: //p' "$dotest/info")"
+ GIT_AUTHOR_DATE="$(sed -n '/^Date/ s/Date: //p' "$dotest/info")"
+ SUBJECT="$(sed -n '/^Subject/ s/Subject: //p' "$dotest/info")"
+
+ case "$keep_subject" in -k) SUBJECT="[PATCH] $SUBJECT" ;; esac
+ if test '' != "$SIGNOFF"
+ then
+ LAST_SIGNED_OFF_BY=`
+ sed -ne '/^Signed-off-by: /p' "$dotest/msg-clean" |
+ tail -n 1
+ `
+ ADD_SIGNOFF=$(test "$LAST_SIGNED_OFF_BY" = "$SIGNOFF" || {
+ test '' = "$LAST_SIGNED_OFF_BY" && echo
+ echo "$SIGNOFF"
+ })
+ else
+ ADD_SIGNOFF=
+ fi
+ {
+ echo "$SUBJECT"
+ if test -s "$dotest/msg-clean"
+ then
+ echo
+ cat "$dotest/msg-clean"
+ fi
+ if test '' != "$ADD_SIGNOFF"
+ then
+ echo "$ADD_SIGNOFF"
+ fi
+ } >"$dotest/final-commit"
+
+ if test "$interactive" = t
+ then
+ action=again
+ while test "$action" = again
+ do
+ echo "Commit Body is:"
+ echo "--------------------------"
+ cat "$dotest/final-commit"
+ echo "--------------------------"
+ echo -n "Apply? [y]es/[n]o/[e]dit/[a]ccept all "
+ read reply
+ case "$reply" in
+ y*|Y*) action=yes ;;
+ a*|A*) action=yes interactive= ;;
+ n*|N*) action=skip ;;
+ e*|E*) "${VISUAL:-${EDITOR:-vi}}" "$dotest/final-commit"
+ action=again ;;
+ esac
+ done
+ else
+ action=yes
+ fi
+
+ if test $action = skip
+ then
+ go_next
+ continue
+ fi
+
+ if test -x "$GIT_DIR"/hooks/applypatch-msg
+ then
+ "$GIT_DIR"/hooks/applypatch-msg "$dotest/final-commit" ||
+ stop_here $this
+ fi
+
+ echo
+ echo "Applying '$SUBJECT'"
+ echo
+
+ git-apply --index "$dotest/patch"; apply_status=$?
+ if test $apply_status = 1 && test "$threeway" = t
+ then
+ (fall_back_3way) || stop_here $this
+
+ # Applying the patch to an earlier tree and merging the
+ # result may have produced the same tree as ours.
+ if test '' = "$(git-diff-index --cached --name-only -z HEAD)"
+ then
+ echo No changes -- Patch already applied.
+ go_next
+ continue
+ fi
+ fi
+ if test $apply_status != 0
+ then
+ echo Patch failed at $msgnum.
+ stop_here $this
+ fi
+
+ if test -x "$GIT_DIR"/hooks/pre-applypatch
+ then
+ "$GIT_DIR"/hooks/pre-applypatch || stop_here $this
+ fi
+
+ tree=$(git-write-tree) &&
+ echo Wrote tree $tree &&
+ parent=$(git-rev-parse --verify HEAD) &&
+ commit=$(git-commit-tree $tree -p $parent <"$dotest/final-commit") &&
+ echo Committed: $commit &&
+ git-update-ref HEAD $commit $parent ||
+ stop_here $this
+
+ if test -x "$GIT_DIR"/hooks/post-applypatch
+ then
+ "$GIT_DIR"/hooks/post-applypatch
+ fi
+
+ go_next
+done
+
+rm -fr "$dotest"