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[PATCH] git-cherry: find commits not merged upstream.
authorJunio C Hamano <junkio@cox.net>
Sat, 25 Jun 2005 09:22:59 +0000 (02:22 -0700)
committerLinus Torvalds <torvalds@ppc970.osdl.org>
Sat, 25 Jun 2005 23:52:16 +0000 (16:52 -0700)
The git-cherry command helps the git-rebase script by finding
commits that have not been merged upstream.  Commits already
included in upstream are prefixed with '-' (meaning "drop from
my local pull"), while commits missing from upstream are
prefixed with '+' (meaning "add to the updated upstream").

Signed-off-by: Junio C Hamano <junkio@cox.net>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Makefile patch | blob | history
git-cherry [new file with mode: 0755] patch | blob

diff --git a/Makefile b/Makefile
index 89f6f93..51d0b26 100644 (file)
--- a/Makefile
+++ b/Makefile
@@ -25,7 +25,7 @@ SCRIPTS=git git-apply-patch-script git-merge-one-file-script git-prune-script \
        git-deltafy-script git-fetch-script git-status-script git-commit-script \
        git-log-script git-shortlog git-cvsimport-script git-diff-script \
        git-reset-script git-add-script git-checkout-script git-clone-script \
-       gitk
+       gitk git-cherry
 
 PROG=   git-update-cache git-diff-files git-init-db git-write-tree \
        git-read-tree git-commit-tree git-cat-file git-fsck-cache \
diff --git a/git-cherry b/git-cherry
new file mode 100755 (executable)
index 0000000..e2a1a2d
--- /dev/null
+++ b/git-cherry
@@ -0,0 +1,86 @@
+#!/bin/sh
+#
+# Copyright (c) 2005 Junio C Hamano.
+#
+
+usage="usage: $0 "'<upstream> [<head>]
+
+             __*__*__*__*__> <upstream>
+            /
+  fork-point
+            \__+__+__+__+__+__+__+__> <head>
+
+Each commit between the fork-point and <head> is examined, and
+compared against the change each commit between the fork-point and
+<upstream> introduces.  If the change does not seem to be in the
+upstream, it is shown on the standard output.
+
+The output is intended to be used as:
+
+    OLD_HEAD=$(git-rev-parse HEAD)
+    git-rev-parse linus >${GIT_DIR-.}/HEAD
+    git-cherry linus OLD_HEAD |
+    while read commit
+    do
+        GIT_EXTERNAL_DIFF=git-apply-patch-script git-diff-tree -p "$commit" &&
+       git-commit-script -m "$commit"
+    done
+'
+
+case "$#" in
+1) linus=`git-rev-parse "$1"` &&
+   junio=`git-rev-parse HEAD` || exit
+   ;;
+2) linus=`git-rev-parse "$1"` &&
+   junio=`git-rev-parse "$2"` || exit
+   ;;
+*) echo >&2 "$usage"; exit 1 ;;
+esac
+
+# Note that these list commits in reverse order;
+# not that the order in inup matters...
+inup=`git-rev-list ^$junio $linus` &&
+ours=`git-rev-list $junio ^$linus` || exit
+
+tmp=.cherry-tmp$$
+patch=$tmp-patch
+mkdir $patch
+trap "rm -rf $tmp-*" 0 1 2 3 15
+
+_x40='[0-9a-f][0-9a-f][0-9a-f][0-9a-f][0-9a-f]'
+_x40="$_x40$_x40$_x40$_x40$_x40$_x40$_x40$_x40"
+
+for c in $inup
+do
+       git-diff-tree -p $c
+done | git-patch-id |
+while read id name
+do
+       echo $name >>$patch/$id
+done
+
+LF='
+'
+
+O=
+for c in $ours
+do
+       set x `git-diff-tree -p $c | git-patch-id`
+       if test "$2" != ""
+       then
+               if test -f "$patch/$2"
+               then
+                       sign=-
+               else
+                       sign=+
+               fi
+               case "$O" in
+               '')     O="$sign $c" ;;
+               *)      O="$sign $c$LF$O" ;;
+               esac
+       fi
+done
+case "$O" in
+'') ;;
+*)  echo "$O" ;;
+esac
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