I have a pre-commit hook which extracts documentation from file $foo
if it has pending changes to be committed. The hook creates/updates
the documentation file and calls "git add" on it.
When I do "git commit", the COMMIT_EDITMSG delivered to my editor
notes that this documentation file has been created/updated, but not
that its changes have been added to the index. However, if I go ahead
with the commit, I can see that the doc file changes were indeed
committed.
Here is a simplified test case:
$ cat .git/hooks/pre-commit
#!/usr/bin/env perl
use strict;
use warnings;
my $old = qx"git rev-parse HEAD:foo 2>/dev/null";
my $new = qx"git rev-parse :foo 2>/dev/null";
if (($? >> 8) != 0 || $old ne $new) {
system "cat source > dest";
system "git add dest";
}
$ ls
source
$ echo 123 >> source
$ git status
# On branch master
# Changed but not updated:
# (use "git add <file>..." to update what will be committed)
# (use "git checkout -- <file>..." to discard changes in working directory)
#
# modified: source
#
no changes added to commit (use "git add" and/or "git commit -a")
$ git commit -a
Test commit
# Please enter the commit message for your changes. Lines starting
# with '#' will be ignored, and an empty message aborts the commit.
# On branch master
# Changes to be committed:
# (use "git reset HEAD <file>..." to unstage)
#
# modified: source
#
# Untracked files:
# (use "git add <file>..." to include in what will be committed)
#
# dest
[master 535ed7f] Test commit
2 files changed, 3 insertions(+), 0 deletions(-)
create mode 100644 dest
$ git status
# On branch master
nothing to commit (working directory clean)
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