git/t/t9128-git-svn-cmd-branch.sh
Johan Herland fe191fcaa5 Git 2.0: git svn: Set default --prefix='origin/' if --prefix is not given
git-svn by default puts its Subversion-tracking refs directly in
refs/remotes/*. This runs counter to Git's convention of using
refs/remotes/$remote/* for storing remote-tracking branches.

Furthermore, combining git-svn with regular git remotes run the risk of
clobbering refs under refs/remotes (e.g. if you have a git remote
called "tags" with a "v1" branch, it will overlap with the git-svn's
tracking branch for the "v1" tag from Subversion.

Even though the git-svn refs stored in refs/remotes/* are not "proper"
remote-tracking branches (since they are not covered by a proper git
remote's refspec), they clearly represent a similar concept, and would
benefit from following the same convention.

For example, if git-svn tracks Subversion branch "foo" at
refs/remotes/foo, and you create a local branch refs/heads/foo to add
some commits to be pushed back to Subversion (using "git svn dcommit),
then it is clearly unhelpful of Git to throw

  warning: refname 'foo' is ambiguous.

every time you checkout, rebase, or otherwise interact with the branch.

The existing workaround for this is to supply the --prefix=quux/ to
git svn init/clone, so that git-svn's tracking branches end up in
refs/remotes/quux/* instead of refs/remotes/*. However, encouraging
users to specify --prefix to work around a design flaw in git-svn is
suboptimal, and not a long term solution to the problem. Instead,
git-svn should default to use a non-empty prefix that saves
unsuspecting users from the inconveniences described above.

This patch will only affect newly created git-svn setups, as the
--prefix option only applies to git svn init (and git svn clone).
Existing git-svn setups will continue with their existing (lack of)
prefix. Also, if anyone somehow prefers git-svn's old layout, they
can recreate that by explicitly passing an empty prefix (--prefix "")
on the git svn init/clone command line.

The patch changes the default value for --prefix from "" to "origin/",
updates the git-svn manual page, and fixes the fallout in the git-svn
testcases.

(Note that this patch might be easier to review using the --word-diff
and --word-diff-regex=. diff options.)

[ew: squashed description of <= 1.9 behavior into manpage]

Suggested-by: Thomas Ferris Nicolaisen <tfnico@gmail.com>
Signed-off-by: Johan Herland <johan@herland.net>
Signed-off-by: Eric Wong <normalperson@yhbt.net>
2014-04-19 11:30:13 +00:00

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#!/bin/sh
#
# Copyright (c) 2008 Deskin Miller
#
test_description='git svn partial-rebuild tests'
. ./lib-git-svn.sh
test_expect_success 'initialize svnrepo' '
mkdir import &&
(
(cd import &&
mkdir trunk branches tags &&
(cd trunk &&
echo foo > foo
) &&
svn_cmd import -m "import for git-svn" . "$svnrepo" >/dev/null
) &&
rm -rf import &&
svn_cmd co "$svnrepo"/trunk trunk &&
(cd trunk &&
echo bar >> foo &&
svn_cmd ci -m "updated trunk"
) &&
rm -rf trunk
)
'
test_expect_success 'import into git' '
git svn init --stdlayout "$svnrepo" &&
git svn fetch &&
git checkout remotes/origin/trunk
'
test_expect_success 'git svn branch tests' '
git svn branch a &&
base=$(git rev-parse HEAD:) &&
test $base = $(git rev-parse remotes/origin/a:) &&
git svn branch -m "created branch b blah" b &&
test $base = $(git rev-parse remotes/origin/b:) &&
test_must_fail git branch -m "no branchname" &&
git svn branch -n c &&
test_must_fail git rev-parse remotes/origin/c &&
test_must_fail git svn branch a &&
git svn branch -t tag1 &&
test $base = $(git rev-parse remotes/origin/tags/tag1:) &&
git svn branch --tag tag2 &&
test $base = $(git rev-parse remotes/origin/tags/tag2:) &&
git svn tag tag3 &&
test $base = $(git rev-parse remotes/origin/tags/tag3:) &&
git svn tag -m "created tag4 foo" tag4 &&
test $base = $(git rev-parse remotes/origin/tags/tag4:) &&
test_must_fail git svn tag -m "no tagname" &&
git svn tag -n tag5 &&
test_must_fail git rev-parse remotes/origin/tags/tag5 &&
test_must_fail git svn tag tag1
'
test_expect_success 'branch uses correct svn-remote' '
(svn_cmd co "$svnrepo" svn &&
cd svn &&
mkdir mirror &&
svn_cmd add mirror &&
svn_cmd copy trunk mirror/ &&
svn_cmd copy tags mirror/ &&
svn_cmd copy branches mirror/ &&
svn_cmd ci -m "made mirror" ) &&
rm -rf svn &&
git svn init -s -R mirror --prefix=mirror/ "$svnrepo"/mirror &&
git svn fetch -R mirror &&
git checkout mirror/trunk &&
base=$(git rev-parse HEAD:) &&
git svn branch -m "branch in mirror" d &&
test $base = $(git rev-parse remotes/mirror/d:) &&
test_must_fail git rev-parse remotes/d
'
test_done