GIT\-RECEIVE\-PACKSection: Git Manual (1)
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NAMEgit-receive-pack - Receive what is pushed into the repository
DESCRIPTIONInvoked by git-send-pack and updates the repository with the information fed from the remote end.
This command is usually not invoked directly by the end user. The UI for the protocol is on the git-send-pack side, and the program pair is meant to be used to push updates to remote repository. For pull operations, see git-fetch-pack.
The command allows for creation and fast forwarding of sha1 refs (heads/tags) on the remote end (strictly speaking, it is the local end receive-pack runs, but to the user who is sitting at the send-pack end, it is updating the remote. Confused?)
There are other real-world examples of using update and post-update hooks found in the Documentation/howto directory.
- The repository to sync into.
PRE-RECEIVE HOOKBefore any ref is updated, if $GIT_DIR/hooks/pre-receive file exists and is executable, it will be invoked once with no parameters. The standard input of the hook will be one line per ref to be updated:
sha1-old SP sha1-new SP refname LF
This hook is called before any refname is updated and before any fast-forward checks are performed.
If the pre-receive hook exits with a non-zero exit status no updates will be performed, and the update, post-receive and post-update hooks will not be invoked either. This can be useful to quickly bail out if the update is not to be supported.
UPDATE HOOKBefore each ref is updated, if $GIT_DIR/hooks/update file exists and is executable, it is invoked once per ref, with three parameters:
$GIT_DIR/hooks/update refname sha1-old sha1-new
The hook should exit with non-zero status if it wants to disallow updating the named ref. Otherwise it should exit with zero.
Successful execution (a zero exit status) of this hook does not ensure the ref will actually be updated, it is only a prerequisite. As such it is not a good idea to send notices (e.g. email) from this hook. Consider using the post-receive hook instead.
POST-RECEIVE HOOKAfter all refs were updated (or attempted to be updated), if any ref update was successful, and if $GIT_DIR/hooks/post-receive file exists and is executable, it will be invoke once with no parameters. The standard input of the hook will be one line for each successfully updated ref:
sha1-old SP sha1-new SP refname LF
Using this hook, it is easy to generate mails describing the updates to the repository. This example script sends one mail message per ref listing the commits pushed to the repository:
#!/bin/sh # mail out commit update information. while read oval nval ref do if expr "$oval" : '0*$' >/dev/null then echo "Created a new ref, with the following commits:" git-rev-list --pretty "$nval" else echo "New commits:" git-rev-list --pretty "$nval" "^$oval" fi | mail -s "Changes to ref $ref" commit-list@mydomain done exit 0
Note that it is possible for refname to not have sha1-new when this hook runs. This can easily occur if another user modifies the ref after it was updated by receive-pack, but before the hook was able to evaluate it. It is recommended that hooks rely on sha1-new rather than the current value of refname.
POST-UPDATE HOOKAfter all other processing, if at least one ref was updated, and if $GIT_DIR/hooks/post-update file exists and is executable, then post-update will called with the list of refs that have been updated. This can be used to implement any repository wide cleanup tasks.
The exit code from this hook invocation is ignored; the only thing left for git-receive-pack to do at that point is to exit itself anyway.
This hook can be used, for example, to run "git-update-server-info" if the repository is packed and is served via a dumb transport.
#!/bin/sh exec git-update-server-info
AUTHORWritten by Linus Torvalds <email@example.com>
DOCUMENTATIONDocumentation by Junio C Hamano.
GITPart of the git(7) suite
- PRE-RECEIVE HOOK
- UPDATE HOOK
- POST-RECEIVE HOOK
- POST-UPDATE HOOK
- SEE ALSO