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git/t/t9118-git-svn-funky-branch-names.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) 2007 Eric Wong
#
test_description='git svn funky branch names'
. ./lib-git-svn.sh
# Abo-Uebernahme (Bug #994)
scary_uri='Abo-Uebernahme%20%28Bug%20%23994%29'
scary_ref='Abo-Uebernahme%20(Bug%20#994)'
test_expect_success 'setup svnrepo' '
mkdir project project/trunk project/branches project/tags &&
echo foo > project/trunk/foo &&
svn_cmd import -m "$test_description" project "$svnrepo/pr ject" &&
rm -rf project &&
svn_cmd cp -m "fun" "$svnrepo/pr ject/trunk" \
"$svnrepo/pr ject/branches/fun plugin" &&
svn_cmd cp -m "more fun!" "$svnrepo/pr ject/branches/fun plugin" \
"$svnrepo/pr ject/branches/more fun plugin!" &&
svn_cmd cp -m "scary" "$svnrepo/pr ject/branches/fun plugin" \
"$svnrepo/pr ject/branches/$scary_uri" &&
svn_cmd cp -m "leading dot" "$svnrepo/pr ject/trunk" \
"$svnrepo/pr ject/branches/.leading_dot" &&
svn_cmd cp -m "trailing dot" "$svnrepo/pr ject/trunk" \
"$svnrepo/pr ject/branches/trailing_dot." &&
svn_cmd cp -m "trailing .lock" "$svnrepo/pr ject/trunk" \
"$svnrepo/pr ject/branches/trailing_dotlock.lock" &&
svn_cmd cp -m "reflog" "$svnrepo/pr ject/trunk" \
"$svnrepo/pr ject/branches/not-a@{0}reflog@" &&
start_httpd
'
# SVN 1.7 will truncate "not-a%40{0]" to just "not-a".
# Look at what SVN wound up naming the branch and use that.
# Be sure to escape the @ if it shows up.
non_reflog=`svn_cmd ls "$svnrepo/pr ject/branches" | grep not-a | sed 's/\///' | sed 's/@/%40/'`
test_expect_success 'test clone with funky branch names' '
git svn clone -s "$svnrepo/pr ject" project &&
(
cd project &&
git rev-parse "refs/remotes/origin/fun%20plugin" &&
git rev-parse "refs/remotes/origin/more%20fun%20plugin!" &&
git rev-parse "refs/remotes/origin/$scary_ref" &&
git rev-parse "refs/remotes/origin/%2Eleading_dot" &&
git rev-parse "refs/remotes/origin/trailing_dot%2E" &&
git rev-parse "refs/remotes/origin/trailing_dotlock%2Elock" &&
git rev-parse "refs/remotes/origin/$non_reflog"
)
'
test_expect_success 'test dcommit to funky branch' "
(
cd project &&
git reset --hard 'refs/remotes/origin/more%20fun%20plugin!' &&
echo hello >> foo &&
git commit -m 'hello' -- foo &&
git svn dcommit
)
"
test_expect_success 'test dcommit to scary branch' '
(
cd project &&
git reset --hard "refs/remotes/origin/$scary_ref" &&
echo urls are scary >> foo &&
git commit -m "eep" -- foo &&
git svn dcommit
)
'
test_expect_success 'test dcommit to trailing_dotlock branch' '
(
cd project &&
git reset --hard "refs/remotes/origin/trailing_dotlock%2Elock" &&
echo who names branches like this anyway? >> foo &&
git commit -m "bar" -- foo &&
git svn dcommit
)
'
stop_httpd
test_done