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git-svn: fix dcommit losing changes when out-of-date from svn

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There was a bug in dcommit (and commit-diff) which caused deltas
to be generated against the latest version of the changed file
in a repository, and not the revision we are diffing (the tree)
against locally.

This bug can cause recent changes to the svn repository to be
silently clobbered by git-svn if our repository is out-of-date.

Thanks to Steven Grimm for noticing the bug.

The (few) people using the commit-diff command are now required
to use the -r/--revision argument.  dcommit usage is unchanged.

Signed-off-by: Eric Wong <normalperson@yhbt.net>
Signed-off-by: Junio C Hamano <junkio@cox.net>
This commit is contained in:
Eric Wong 2006-11-09 01:19:37 -08:00 committed by Junio C Hamano
parent a35a045874
commit 45bf473a7b
4 changed files with 102 additions and 4 deletions
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1
Documentation/git-svn.txt
View File

@ -120,6 +120,7 @@ manually joining branches on commit.
URL of the target Subversion repository. The final argument
(URL) may be omitted if you are working from a git-svn-aware
repository (that has been init-ed with git-svn).
The -r<revision> option is required for this.
'graft-branches'::
This command attempts to detect merges/branches from already

29
git-svn.perl
View File

@ -134,6 +134,7 @@ my %cmd = (
'commit-diff' => [ \&commit_diff, 'Commit a diff between two trees',
{ 'message|m=s' => \$_message,
'file|F=s' => \$_file,
'revision|r=s' => \$_revision,
%cmt_opts } ],
dcommit => [ \&dcommit, 'Commit several diffs to merge with upstream',
{ 'merge|m|M' => \$_merge,
@ -586,11 +587,21 @@ sub commit_lib {
sub dcommit {
my $gs = "refs/remotes/$GIT_SVN";
chomp(my @refs = safe_qx(qw/git-rev-list --no-merges/, "$gs..HEAD"));
my $last_rev;
foreach my $d (reverse @refs) {
unless (defined $last_rev) {
(undef, $last_rev, undef) = cmt_metadata("$d~1");
unless (defined $last_rev) {
die "Unable to extract revision information ",
"from commit $d~1\n";
}
}
if ($_dry_run) {
print "diff-tree $d~1 $d\n";
} else {
commit_diff("$d~1", $d);
if (my $r = commit_diff("$d~1", $d, undef, $last_rev)) {
$last_rev = $r;
} # else: no changes, same $last_rev
}
}
return if $_dry_run;
@ -814,6 +825,8 @@ sub commit_diff {
print STDERR "Needed URL or usable git-svn id command-line\n";
commit_diff_usage();
}
my $r = shift || $_revision;
die "-r|--revision is a required argument\n" unless (defined $r);
if (defined $_message && defined $_file) {
print STDERR "Both --message/-m and --file/-F specified ",
"for the commit message.\n",
@ -830,13 +843,22 @@ sub commit_diff {
($repo, $SVN_PATH) = repo_path_split($SVN_URL);
$SVN_LOG ||= libsvn_connect($repo);
$SVN ||= libsvn_connect($repo);
if ($r eq 'HEAD') {
$r = $SVN->get_latest_revnum;
} elsif ($r !~ /^\d+$/) {
die "revision argument: $r not understood by git-svn\n";
}
my @lock = $SVN::Core::VERSION ge '1.2.0' ? (undef, 0) : ();
my $ed = SVN::Git::Editor->new({ r => $SVN->get_latest_revnum,
my $rev_committed;
my $ed = SVN::Git::Editor->new({ r => $r,
ra => $SVN_LOG, c => $tb,
svn_path => $SVN_PATH
},
$SVN->get_commit_editor($_message,
sub {print "Committed $_[0]\n"},@lock)
sub {
$rev_committed = $_[0];
print "Committed $_[0]\n";
}, @lock)
);
my $mods = libsvn_checkout_tree($ta, $tb, $ed);
if (@$mods == 0) {
@ -846,6 +868,7 @@ sub commit_diff {
$ed->close_edit;
}
$_message = $_file = undef;
return $rev_committed;
}
########################### utility functions #########################

2
t/t9105-git-svn-commit-diff.sh
View File

@ -33,7 +33,7 @@ prev=`git rev-parse --verify HEAD^1`
test_expect_success 'test the commit-diff command' "
test -n '$prev' && test -n '$head' &&
git-svn commit-diff '$prev' '$head' '$svnrepo' &&
git-svn commit-diff -r1 '$prev' '$head' '$svnrepo' &&
svn co $svnrepo wc &&
cmp readme wc/readme
"

74
t/t9106-git-svn-commit-diff-clobber.sh Executable file
View File

@ -0,0 +1,74 @@
#!/bin/sh
#
# Copyright (c) 2006 Eric Wong
test_description='git-svn commit-diff clobber'
. ./lib-git-svn.sh
if test -n "$GIT_SVN_NO_LIB" && test "$GIT_SVN_NO_LIB" -ne 0
then
echo 'Skipping: commit-diff clobber needs SVN libraries'
test_done
exit 0
fi
test_expect_success 'initialize repo' "
mkdir import &&
cd import &&
echo initial > file &&
svn import -m 'initial' . $svnrepo &&
cd .. &&
echo initial > file &&
git update-index --add file &&
git commit -a -m 'initial'
"
test_expect_success 'commit change from svn side' "
svn co $svnrepo t.svn &&
cd t.svn &&
echo second line from svn >> file &&
svn commit -m 'second line from svn' &&
cd .. &&
rm -rf t.svn
"
test_expect_failure 'commit conflicting change from git' "
echo second line from git >> file &&
git commit -a -m 'second line from git' &&
git-svn commit-diff -r1 HEAD~1 HEAD $svnrepo
" || true
test_expect_success 'commit complementing change from git' "
git reset --hard HEAD~1 &&
echo second line from svn >> file &&
git commit -a -m 'second line from svn' &&
echo third line from git >> file &&
git commit -a -m 'third line from git' &&
git-svn commit-diff -r2 HEAD~1 HEAD $svnrepo
"
test_expect_failure 'dcommit fails to commit because of conflict' "
git-svn init $svnrepo &&
git-svn fetch &&
git reset --hard refs/remotes/git-svn &&
svn co $svnrepo t.svn &&
cd t.svn &&
echo fourth line from svn >> file &&
svn commit -m 'fourth line from svn' &&
cd .. &&
rm -rf t.svn &&
echo 'fourth line from git' >> file &&
git commit -a -m 'fourth line from git' &&
git-svn dcommit
" || true
test_expect_success 'dcommit does the svn equivalent of an index merge' "
git reset --hard refs/remotes/git-svn &&
echo 'index merge' > file2 &&
git update-index --add file2 &&
git commit -a -m 'index merge' &&
echo 'more changes' >> file2 &&
git update-index file2 &&
git commit -a -m 'more changes' &&
git-svn dcommit
"
test_done