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[PATCH v7 03/13] Documentation: document post-rewrite hook

From
Thomas Rast <trast@student.ethz.ch>
Date
Mar 12, 2010, 17:04 UTC
Message-ID
<2cbffdbdfb20a0c570fb2b7030a106c1c78768a5.1268413246.git.trast@student.ethz.ch>
In-Reply-To
<cover.1268413246.git.trast@student.ethz.ch>

This defines the behaviour of the post-rewrite hook support, which will be implemented in the following patches.

We deliberately do not document how often the hook will be invoked per rewriting command, but the interface is designed to keep that at "once". This would currently not matter too much, since both rebase and filter-branch are shellscripts and spawn many processes anyway. However, when a fast sequencer in C is implemented, it will be beneficial to only have to run the hook once.

Signed-off-by: Thomas Rast <trast@student.ethz.ch>
---
 Documentation/githooks.txt |   34 ++++++++++++++++++++++++++++++++++
 1 files changed, 34 insertions(+), 0 deletions(-)
diff --git a/Documentation/githooks.txt b/Documentation/githooks.txt
index 87e2c03..a741769 100644
--- a/Documentation/githooks.txt
+++ b/Documentation/githooks.txt
@@ -317,6 +317,40 @@ This hook is invoked by 'git gc --auto'. It takes no parameter, and
 exiting with non-zero status from this script causes the 'git gc --auto'
 to abort.
 
+post-rewrite
+~~~~~~~~~~~~
+
+This hook is invoked by commands that rewrite commits (`git commit
+--amend`, 'git-rebase'; currently 'git-filter-branch' does 'not' call
+it!).  Its first argument denotes the command it was invoked by:
+currently one of `amend` or `rebase`.  Further command-dependent
+arguments may be passed in the future.
+
+The hook receives a list of the rewritten commits on stdin, in the
+format
+
+  <old-sha1> SP <new-sha1> [ SP <extra-info> ] LF
+
+The 'extra-info' is again command-dependent.  If it is empty, the
+preceding SP is also omitted.  Currently, no commands pass any
+'extra-info'.
+
+The following command-specific comments apply:
+
+rebase::
+	For the 'squash' and 'fixup' operation, all commits that were
+	squashed are listed as being rewritten to the squashed commit.
+	This means that there will be several lines sharing the same
+	'new-sha1'.
++
+The commits are guaranteed to be listed in the order that they were
+processed by rebase.
+
+There is no default 'post-rewrite' hook, but see the
+`post-receive-copy-notes` script in `contrib/hooks` for an example
+that copies your git-notes to the rewritten commits.
+
+
 GIT
 ---
 Part of the linkgit:git[1] suite
-- 
1.7.0.2.417.gbc354
Previous: Thomas RastNext: Thomas Rast
Message 4 of 18 in “tr/display-notes”
  1. 00/13 tr/display-notesThomas Rast, Mar 12, 2010
  2. 01/13 test-lib: unset GIT_NOTES_REF to stop it from influencing testsThomas Rast, Mar 12, 2010
  3. 02/13 Support showing notes from more than one notes treeThomas Rast, Mar 12, 2010
  4. 03/13 Documentation: document post-rewrite hookThomas Rast, Mar 12, 2010
  5. 04/13 commit --amend: invoke post-rewrite hookThomas Rast, Mar 12, 2010
  6. 05/13 rebase: invoke post-rewrite hookThomas Rast, Mar 12, 2010
  7. 06/13 rebase -i: invoke post-rewrite hookThomas Rast, Mar 12, 2010
  8. 07/13 notes: implement 'git notes copy --stdin'Thomas Rast, Mar 12, 2010
  9. notes: Initialize variable to appease Sun StudioÆvar Arnfjörð Bjarmason, Jun 14, 2010
  10. Junio C HamanoJun 19, 2010
  11. Ævar Arnfjörð BjarmasonJun 19, 2010
  12. Ramsay JonesJun 21, 2010
  13. 08/13 notes: implement helpers needed for note copying during rewriteThomas Rast, Mar 12, 2010
  14. 09/13 rebase: support automatic notes copyingThomas Rast, Mar 12, 2010
  15. 10/13 commit --amend: copy notes to the new commitThomas Rast, Mar 12, 2010
  16. 11/13 notes: add shorthand --ref to override GIT_NOTES_REFThomas Rast, Mar 12, 2010
  17. 12/13 notes: track whether notes_trees were changed at allThomas Rast, Mar 12, 2010
  18. 13/13 git-notes(1): add a section about the meaning of historyThomas Rast, Mar 12, 2010

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