git/t/t9161-git-svn-mergeinfo-push.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
#
# Portions copyright (c) 2007, 2009 Sam Vilain
# Portions copyright (c) 2011 Bryan Jacobs
#
test_description='git-svn svn mergeinfo propagation'
. ./lib-git-svn.sh
test_expect_success 'load svn dump' "
svnadmin load -q '$rawsvnrepo' \
< '$TEST_DIRECTORY/t9161/branches.dump' &&
git svn init --minimize-url -R svnmerge \
-T trunk -b branches '$svnrepo' &&
git svn fetch --all
"
test_expect_success 'propagate merge information' '
git config svn.pushmergeinfo yes &&
git checkout origin/svnb1 &&
git merge --no-ff origin/svnb2 &&
git svn dcommit
'
test_expect_success 'check svn:mergeinfo' '
mergeinfo=$(svn_cmd propget svn:mergeinfo "$svnrepo"/branches/svnb1)
test "$mergeinfo" = "/branches/svnb2:3,8"
'
test_expect_success 'merge another branch' '
git merge --no-ff origin/svnb3 &&
git svn dcommit
'
test_expect_success 'check primary parent mergeinfo respected' '
mergeinfo=$(svn_cmd propget svn:mergeinfo "$svnrepo"/branches/svnb1)
test "$mergeinfo" = "/branches/svnb2:3,8
/branches/svnb3:4,9"
'
test_expect_success 'merge existing merge' '
git merge --no-ff origin/svnb4 &&
git svn dcommit
'
test_expect_success "check both parents' mergeinfo respected" '
mergeinfo=$(svn_cmd propget svn:mergeinfo "$svnrepo"/branches/svnb1)
test "$mergeinfo" = "/branches/svnb2:3,8
/branches/svnb3:4,9
/branches/svnb4:5-6,10-12
/branches/svnb5:6,11"
'
test_expect_success 'make further commits to branch' '
git checkout origin/svnb2 &&
touch newb2file &&
git add newb2file &&
git commit -m "later b2 commit" &&
touch newb2file-2 &&
git add newb2file-2 &&
git commit -m "later b2 commit 2" &&
git svn dcommit
'
test_expect_success 'second forward merge' '
git checkout origin/svnb1 &&
git merge --no-ff origin/svnb2 &&
git svn dcommit
'
test_expect_success 'check new mergeinfo added' '
mergeinfo=$(svn_cmd propget svn:mergeinfo "$svnrepo"/branches/svnb1)
test "$mergeinfo" = "/branches/svnb2:3,8,16-17
/branches/svnb3:4,9
/branches/svnb4:5-6,10-12
/branches/svnb5:6,11"
'
test_expect_success 'reintegration merge' '
git checkout origin/svnb4 &&
git merge --no-ff origin/svnb1 &&
git svn dcommit
'
test_expect_success 'check reintegration mergeinfo' '
mergeinfo=$(svn_cmd propget svn:mergeinfo "$svnrepo"/branches/svnb4)
test "$mergeinfo" = "/branches/svnb1:2-4,7-9,13-18
/branches/svnb2:3,8,16-17
/branches/svnb3:4,9
/branches/svnb5:6,11"
'
test_expect_success 'dcommit a merge at the top of a stack' '
git checkout origin/svnb1 &&
touch anotherfile &&
git add anotherfile &&
git commit -m "a commit" &&
git merge origin/svnb4 &&
git svn dcommit
'
test_done