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Pushing to Git
==============
Detached HEAD
-------------
Most remote Git repositories reside on a hosting service, such as
Github or GitLab, and have HEAD pointing to the default branch,
usually `master` or `main`. Local repositories, can end up in a
detached state, where HEAD rather than being a symref pointing to
another ref, is a direct ref pointing to a commit.
This test excercises that specific edge case: Pushing to a repository
with a detached head. With publishing-on-push, there are two possible
failure modes we want to prevent.
1) Did we assume that HEAD is a symref?
2) What happens when you push to a descendent of HEAD, but HEAD is draft?
Load commonly used test logic
$ . "$TESTDIR/testutil"
Create a Git repository with a detached head
$ git init gitrepo
Initialized empty Git repository in $TESTTMP/gitrepo/.git/
$ cd gitrepo
$ echo alpha > alpha
$ git add alpha
$ fn_git_commit -m "add alpha"
$ git checkout -d master
HEAD is now at 7eeab2e add alpha
$ cd ..
Verify that we can push to a Git repository that has a detached HEAD
With detection of HEAD on push, it is easy to implicitly assume that
HEAD is a symref. To prevent this, we specifically verify that pushing
in this case continues to work.
$ hg clone gitrepo hgrepo
importing 1 git commits
new changesets ff7a2f2d8d70 (1 drafts)
updating to bookmark master
1 files updated, 0 files merged, 0 files removed, 0 files unresolved
$ cd hgrepo
$ echo beta > beta
$ hg add beta
$ fn_hg_commit -m "add beta"
Pushing that changeset, with phases, publishes the detached HEAD.
Whether this should happen is debatable, but it's a side effect from
the fact that pushing to the remote HEAD, with HEAD being the usual
symref, should publish it.
$ hg push -v --config hggit.usephases=yes
pushing to $TESTTMP/gitrepo
finding unexported changesets
exporting 1 changesets
converting revision 47580592d3d6492421a1e6cebc5c2d701a2e858b
packing 3 loose objects...
searching for changes
remote: counting objects: 5, done.
1 commits found
adding objects
remote: counting objects: 5, done.
remote: found 0 deltas to reuse
added 1 commits with 1 trees and 1 blobs
updating reference default::refs/heads/master => GIT:0f378ab6
publishing remote HEAD
$ hg phase 'all()'
0: public
1: draft
$ cd ..
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