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git-svn: teach find-rev to find near matches

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When a single SVN repository is split into multiple Git repositories
many SVN revisions will exist in only one of the Git repositories
created.  For some projects the only way to build a working artifact is
to check out corresponding versions of various repositories, with no
indication of what those are in the Git world - in the SVN world the
revision numbers are sufficient.

By adding "--before" to "git-svn find-rev" we can say "tell me what this
repository looked like when that other repository looked like this":

    git svn find-rev --before \
        r$(git --git-dir=/over/there.git svn find-rev HEAD)

Signed-off-by: John Keeping <john@keeping.me.uk>
Signed-off-by: Eric Wong <normalperson@yhbt.net>
This commit is contained in:
John Keeping 2013-01-17 22:19:33 +00:00 committed by Eric Wong
parent 9012f571b4
commit 2934a484fd
2 changed files with 20 additions and 2 deletions
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10
Documentation/git-svn.txt
View File

@ -346,6 +346,16 @@ Any other arguments are passed directly to 'git log'
corresponding git commit hash (this can optionally be followed by a
tree-ish to specify which branch should be searched). When given a
tree-ish, returns the corresponding SVN revision number.
+
--before;;
Don't require an exact match if given an SVN revision, instead find
the commit corresponding to the state of the SVN repository (on the
current branch) at the specified revision.
+
--after;;
Don't require an exact match if given an SVN revision; if there is
not an exact match return the closest match searching forward in the
history.
'set-tree'::
You should consider using 'dcommit' instead of this command.

12
git-svn.perl
View File

@ -114,6 +114,7 @@ my ($_stdin, $_help, $_edit,
$_message, $_file, $_branch_dest,
$_template, $_shared,
$_version, $_fetch_all, $_no_rebase, $_fetch_parent,
$_before, $_after,
$_merge, $_strategy, $_preserve_merges, $_dry_run, $_local,
$_prefix, $_no_checkout, $_url, $_verbose,
$_commit_url, $_tag, $_merge_info, $_interactive);
@ -258,7 +259,8 @@ my %cmd = (
} ],
'find-rev' => [ \&cmd_find_rev,
"Translate between SVN revision numbers and tree-ish",
{} ],
{ 'before' => \$_before,
'after' => \$_after } ],
'rebase' => [ \&cmd_rebase, "Fetch and rebase your working directory",
{ 'merge|m|M' => \$_merge,
'verbose|v' => \$_verbose,
@ -1191,7 +1193,13 @@ sub cmd_find_rev {
"$head history\n";
}
my $desired_revision = substr($revision_or_hash, 1);
$result = $gs->rev_map_get($desired_revision, $uuid);
if ($_before) {
$result = $gs->find_rev_before($desired_revision, 1);
} elsif ($_after) {
$result = $gs->find_rev_after($desired_revision, 1);
} else {
$result = $gs->rev_map_get($desired_revision, $uuid);
}
} else {
my (undef, $rev, undef) = cmt_metadata($revision_or_hash);
$result = $rev;