path: root/Documentation
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authorJunio C Hamano <>2015-04-26 01:47:21 (GMT)
committerJunio C Hamano <>2015-04-29 20:27:31 (GMT)
commit74e8bc59cb324d2d7a55c90195db004219770eec (patch)
tree1ad1ba823e9be15691af9d23e22e3d6ce5839b73 /Documentation
parent770380156dd06cd03d83957d55484f4a98ad284f (diff)
merge: handle FETCH_HEAD internally
The collect_parents() function now is responsible for 1. parsing the commits given on the command line into a list of commits to be merged; 2. filtering these parents into independent ones; and 3. optionally calling fmt_merge_msg() via prepare_merge_message() to prepare an auto-generated merge log message, using fake contents that FETCH_HEAD would have had if these commits were fetched from the current repository with "git pull . $args..." Make "git merge FETCH_HEAD" to be the same as the traditional git merge "$(git fmt-merge-msg <.git/FETCH_HEAD)" $commits invocation of the command in "git pull", where $commits are the ones that appear in FETCH_HEAD that are not marked as not-for-merge, by making it do a bit more, specifically: - noticing "FETCH_HEAD" is the only "commit" on the command line and picking the commits that are not marked as not-for-merge as the list of commits to be merged (substitute for step #1 above); - letting the resulting list fed to step #2 above; - doing the step #3 above, using the contents of the FETCH_HEAD instead of fake contents crafted from the list of commits parsed in the step #1 above. Note that this changes the semantics. "git merge FETCH_HEAD" has always behaved as if the first commit in the FETCH_HEAD file were directly specified on the command line, creating a two-way merge whose auto-generated merge log said "merge commit xyz". With this change, if the previous fetch was to grab multiple branches (e.g. "git fetch $there topic-a topic-b"), the new world order is to create an octopus, behaving as if "git pull $there topic-a topic-b" were run. This is a deliberate change to make that happen, and can be seen in the changes to t3033 tests. Signed-off-by: Junio C Hamano <>
Diffstat (limited to 'Documentation')
1 files changed, 4 insertions, 0 deletions
diff --git a/Documentation/git-merge.txt b/Documentation/git-merge.txt
index cf2c374..d9aa6b6 100644
--- a/Documentation/git-merge.txt
+++ b/Documentation/git-merge.txt
@@ -104,6 +104,10 @@ commit or stash your changes before running 'git merge'.
If no commit is given from the command line, merge the remote-tracking
branches that the current branch is configured to use as its upstream.
See also the configuration section of this manual page.
+When `FETCH_HEAD` (and no other commit) is specified, the branches
+recorded in the `.git/FETCH_HEAD` file by the previous invocation
+of `git fetch` for merging are merged to the current branch.