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Commit47ac37b

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Assured that branch changes are properly handled.
Previously we could try to remove the branch we are on.Of course, we have a test-case elaborate enough to verify we don'tdestroy changes in submodules accidentally. Therefore I am confidentthat this implementation is correct.Fixesgitpython-developers#49
1 parentbb0f3d7 commit47ac37b

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5 files changed

+77
-30
lines changed

5 files changed

+77
-30
lines changed

‎git/objects/submodule/base.py‎

Lines changed: 0 additions & 12 deletions
Original file line numberDiff line numberDiff line change
@@ -411,21 +411,9 @@ def add(cls, repo, name, path, url=None, branch=None, no_checkout=False):
411411
del(writer)
412412

413413
# we deliberatly assume that our head matches our index !
414-
415-
try:
416-
repo.head.commit
417-
parent_repo_is_empty=False
418-
exceptValueError:
419-
parent_repo_is_empty=True
420-
# Can't set this yet, if the parent repo is empty.
421-
# end
422414
sm.binsha=mrepo.head.commit.binsha
423415
index.add([sm],write=True)
424416

425-
ifparent_repo_is_empty:
426-
log.debug("Will not set _parent_commit now as the parent repository has no commit yet.")
427-
# end
428-
429417
returnsm
430418

431419
defupdate(self,recursive=False,init=True,to_latest_revision=False,progress=None,dry_run=False,

‎git/objects/submodule/root.py‎

Lines changed: 10 additions & 15 deletions
Original file line numberDiff line numberDiff line change
@@ -287,6 +287,11 @@ def update(self, previous_commit=None, recursive=True, force_remove=False, init=
287287
ifnotdry_run:
288288
smm=sm.module()
289289
smmr=smm.remotes
290+
# As the branch might not exist yet, we will have to fetch all remotes to be sure ... .
291+
forremoteinsmmr:
292+
remote.fetch(progress=progress)
293+
# end for each remote
294+
290295
try:
291296
tbr=git.Head.create(smm,sm.branch_name,logmsg='branch: Created from HEAD')
292297
exceptOSError:
@@ -295,21 +300,11 @@ def update(self, previous_commit=None, recursive=True, force_remove=False, init=
295300
# END assure tracking branch exists
296301

297302
tbr.set_tracking_branch(find_first_remote_branch(smmr,sm.branch_name))
298-
# figure out whether the previous tracking branch contains
299-
# new commits compared to the other one, if not we can
300-
# delete it.
301-
try:
302-
tbr=find_first_remote_branch(smmr,psm.branch_name)
303-
iflen(smm.git.cherry(tbr,psm.branch))==0:
304-
psm.branch.delete(smm,psm.branch)
305-
# END delete original tracking branch if there are no changes
306-
exceptInvalidGitRepositoryError:
307-
# ignore it if the previous branch couldn't be found in the
308-
# current remotes, this just means we can't handle it
309-
pass
310-
# END exception handling
311-
312-
# NOTE: All checkout is done in the base implementation of update
303+
# NOTE: All head-resetting is done in the base implementation of update
304+
# but we will have to checkout the new branch here. As it still points to the currently
305+
# checkout out commit, we don't do any harm.
306+
# As we don't want to update working-tree or index, changing the ref is all there is to do
307+
smm.head.reference=tbr
313308
# END handle dry_run
314309

315310
progress.update(

‎git/objects/submodule/util.py‎

Lines changed: 1 addition & 1 deletion
Original file line numberDiff line numberDiff line change
@@ -49,7 +49,7 @@ def find_first_remote_branch(remotes, branch_name):
4949
continue
5050
# END exception handling
5151
# END for remote
52-
raiseInvalidGitRepositoryError("Didn't find remote branch%r in any of the given remotes",branch_name)
52+
raiseInvalidGitRepositoryError("Didn't find remote branch'%r' in any of the given remotes"%branch_name)
5353

5454
#} END utilities
5555

‎git/repo/fun.py‎

Lines changed: 1 addition & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -26,6 +26,7 @@
2626
deftouch(filename):
2727
fp=open(filename,"ab")
2828
fp.close()
29+
returnfilename
2930

3031

3132
defis_git_dir(d):

‎git/test/test_submodule.py‎

Lines changed: 65 additions & 2 deletions
Original file line numberDiff line numberDiff line change
@@ -529,10 +529,9 @@ def test_root_module(self, rwrepo):
529529

530530
# 'apply work' to the nested submodule and assure this is not removed/altered during updates
531531
# Need to commit first, otherwise submodule.update wouldn't have a reason to change the head
532-
nsm_file=os.path.join(nsm.module().working_tree_dir,'new-file')
532+
touch(os.path.join(nsm.module().working_tree_dir,'new-file'))
533533
# We cannot expect is_dirty to even run as we wouldn't reset a head to the same location
534534
assertnsm.module().head.commit.hexsha==nsm.hexsha
535-
touch(nsm_file)
536535
nsm.module().index.add([nsm])
537536
nsm.module().index.commit("added new file")
538537
rm.update(recursive=False,dry_run=True,progress=prog)# would not change head, and thus doens't fail
@@ -778,3 +777,67 @@ def test_rename(self, rwdir):
778777
ifos.path.isfile(os.path.join(sm_mod.working_tree_dir,'.git'))==sm._need_gitfile_submodules(parent.git):
779778
assertsm_mod.git_dir.endswith(".git/modules/"+new_sm_name)
780779
# end
780+
781+
@with_rw_directory
782+
deftest_branch_renames(self,rw_dir):
783+
# Setup initial sandbox:
784+
# parent repo has one submodule, which has all the latest changes
785+
source_url=self._submodule_url()
786+
sm_source_repo=git.Repo.clone_from(source_url,os.path.join(rw_dir,'sm-source'))
787+
parent_repo=git.Repo.init(os.path.join(rw_dir,'parent'))
788+
sm=parent_repo.create_submodule('mysubmodule','subdir/submodule',
789+
sm_source_repo.working_tree_dir,branch='master')
790+
parent_repo.index.commit('added submodule')
791+
assertsm.exists()
792+
793+
# Create feature branch with one new commit in submodule source
794+
sm_fb=sm_source_repo.create_head('feature')
795+
sm_fb.checkout()
796+
new_file=touch(os.path.join(sm_source_repo.working_tree_dir,'new-file'))
797+
sm_source_repo.index.add([new_file])
798+
sm.repo.index.commit("added new file")
799+
800+
# change designated submodule checkout branch to the new upstream feature branch
801+
smcw=sm.config_writer()
802+
smcw.set_value('branch',sm_fb.name)
803+
smcw.release()
804+
assertsm.repo.is_dirty(index=True,working_tree=False)
805+
sm.repo.index.commit("changed submodule branch to '%s'"%sm_fb)
806+
807+
# verify submodule update with feature branch that leaves currently checked out branch in it's past
808+
sm_mod=sm.module()
809+
prev_commit=sm_mod.commit()
810+
assertsm_mod.head.ref.name=='master'
811+
assertparent_repo.submodule_update()
812+
assertsm_mod.head.ref.name==sm_fb.name
813+
assertsm_mod.commit()==prev_commit,"Without to_latest_revision, we don't change the commit"
814+
815+
assertparent_repo.submodule_update(to_latest_revision=True)
816+
assertsm_mod.head.ref.name==sm_fb.name
817+
assertsm_mod.commit()==sm_fb.commit
818+
819+
# Create new branch which is in our past, and thus seemingly unrelated to the currently checked out one
820+
# To make it even 'harder', we shall fork and create a new commit
821+
sm_pfb=sm_source_repo.create_head('past-feature',commit='HEAD~20')
822+
sm_pfb.checkout()
823+
sm_source_repo.index.add([touch(os.path.join(sm_source_repo.working_tree_dir,'new-file'))])
824+
sm_source_repo.index.commit("new file added, to past of '%r'"%sm_fb)
825+
826+
# Change designated submodule checkout branch to a new commit in its own past
827+
smcw=sm.config_writer()
828+
smcw.set_value('branch',sm_pfb.path)
829+
smcw.release()
830+
sm.repo.index.commit("changed submodule branch to '%s'"%sm_pfb)
831+
832+
# Test submodule updates - must fail if submodule is dirty
833+
touch(os.path.join(sm_mod.working_tree_dir,'unstaged file'))
834+
# This doesn't fail as our own submodule binsha didn't change, and the reset is only triggered if
835+
# to latest revision is True.
836+
parent_repo.submodule_update(to_latest_revision=False)
837+
sm_mod.head.ref.name==sm_pfb.name,"should have been switched to past head"
838+
sm_mod.commit()==sm_fb.commit,"Head wasn't reset"
839+
840+
self.failUnlessRaises(RepositoryDirtyError,parent_repo.submodule_update,to_latest_revision=True)
841+
parent_repo.submodule_update(to_latest_revision=True,force_reset=True)
842+
assertsm_mod.commit()==sm_pfb.commit,"Now head should have been reset"
843+
assertsm_mod.head.ref.name==sm_pfb.name

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