90 lines
3.1 KiB
Text
90 lines
3.1 KiB
Text
Subject: [HOWTO] Using post-update hook
|
|
Message-ID: <7vy86o6usx.fsf@assigned-by-dhcp.cox.net>
|
|
From: Junio C Hamano <gitster@pobox.com>
|
|
Date: Fri, 26 Aug 2005 18:19:10 -0700
|
|
Abstract: In this how-to article, JC talks about how he
|
|
uses the post-update hook to automate Git documentation page
|
|
shown at https://www.kernel.org/pub/software/scm/git/docs/.
|
|
Content-type: text/asciidoc
|
|
|
|
How to rebuild from update hook
|
|
===============================
|
|
|
|
The pages under https://www.kernel.org/pub/software/scm/git/docs/
|
|
are built from Documentation/ directory of the git.git project
|
|
and needed to be kept up-to-date. The www.kernel.org/ servers
|
|
are mirrored and I was told that the origin of the mirror is on
|
|
the machine $some.kernel.org, on which I was given an account
|
|
when I took over Git maintainership from Linus.
|
|
|
|
The directories relevant to this how-to are these two:
|
|
|
|
/pub/scm/git/git.git/ The public Git repository.
|
|
/pub/software/scm/git/docs/ The HTML documentation page.
|
|
|
|
So I made a repository to generate the documentation under my
|
|
home directory over there.
|
|
|
|
$ cd
|
|
$ mkdir doc-git && cd doc-git
|
|
$ git clone /pub/scm/git/git.git/ docgen
|
|
|
|
What needs to happen is to update the $HOME/doc-git/docgen/
|
|
working tree, build HTML docs there and install the result in
|
|
/pub/software/scm/git/docs/ directory. So I wrote a little
|
|
script:
|
|
|
|
$ cat >dododoc.sh <<\EOF
|
|
#!/bin/sh
|
|
cd $HOME/doc-git/docgen || exit
|
|
|
|
unset GIT_DIR
|
|
|
|
git pull /pub/scm/git/git.git/ master &&
|
|
cd Documentation &&
|
|
make install-webdoc
|
|
EOF
|
|
|
|
Initially I used to run this by hand whenever I push into the
|
|
public Git repository. Then I did a cron job that ran twice a
|
|
day. The current round uses the post-update hook mechanism,
|
|
like this:
|
|
|
|
$ cat >/pub/scm/git/git.git/hooks/post-update <<\EOF
|
|
#!/bin/sh
|
|
#
|
|
# An example hook script to prepare a packed repository for use over
|
|
# dumb transports.
|
|
#
|
|
# To enable this hook, make this file executable by "chmod +x post-update".
|
|
|
|
case " $* " in
|
|
*' refs/heads/master '*)
|
|
echo $HOME/doc-git/dododoc.sh | at now
|
|
;;
|
|
esac
|
|
exec git-update-server-info
|
|
EOF
|
|
$ chmod +x /pub/scm/git/git.git/hooks/post-update
|
|
|
|
There are four things worth mentioning:
|
|
|
|
- The update-hook is run after the repository accepts a "git
|
|
push", under my user privilege. It is given the full names
|
|
of refs that have been updated as arguments. My post-update
|
|
runs the dododoc.sh script only when the master head is
|
|
updated.
|
|
|
|
- When update-hook is run, GIT_DIR is set to '.' by the calling
|
|
receive-pack. This is inherited by the dododoc.sh run via
|
|
the "at" command, and needs to be unset; otherwise, "git
|
|
pull" it does into $HOME/doc-git/docgen/ repository would not
|
|
work correctly.
|
|
|
|
- The stdout of update hook script is not connected to git
|
|
push; I run the heavy part of the command inside "at", to
|
|
receive the execution report via e-mail.
|
|
|
|
- This is still crude and does not protect against simultaneous
|
|
make invocations stomping on each other. I would need to add
|
|
some locking mechanism for this.
|