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Jeff King cc8fcd1e1a clone: use remote branch if it matches default HEAD 
Usually clone tries to use the same local HEAD as the remote (unless the
user has given --branch explicitly). Even if the remote HEAD is detached
or unborn, we can detect those situations with modern versions of Git.
If the remote is too old to support the "unborn" extension (or it has
been disabled via config), then we can't know the name of the remote's
unborn HEAD, and we fall back whatever the local default branch name is
configured to be.

But that leads to one weird corner case. It's rare because it needs a
number of factors:

  - the remote has an unborn HEAD

  - the remote is too old to support "unborn", or has disabled it

  - the remote has another branch "foo"

  - the local default branch name is "foo"

In that case you end up with a local clone on an unborn "foo" branch,
disconnected completely from the remote's "foo". This is rare in
practice, but the result is quite confusing.

When choosing "foo", we can double check whether the remote has such a
name, and if so, start our local "foo" at the same spot, rather than
making it unborn.

Note that this causes a test failure in t5605, which is cloning from a
bundle that doesn't contain HEAD (so it behaves like a remote that
doesn't support "unborn"), but has a single "main" branch. That test
expects that we end up in the weird "unborn main" case, where we don't
actually check out the remote branch of the same name. Even though we
have to update the test, this seems like an argument in favor of this
patch: checking out main is what I'd expect from such a bundle.

So this patch updates the test for the new behavior and adds an adjacent
one that checks what the original was going for: if there's no HEAD and
the bundle _doesn't_ have a branch that matches our local default name,
then we end up with nothing checked out.

Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2022-07-07 20:57:54 -07:00
..
add.c add: remove support for git-legacy-stash 2022-01-27 18:00:15 -08:00
am.c Merge branch 'ab/date-mode-release' 2022-02-25 15:47:36 -08:00
annotate.c
apply.c
archive.c use xopen() to handle fatal open(2) failures 2021-08-25 14:39:08 -07:00
bisect--helper.c Merge branch 'ac/usage-string-fixups' 2022-03-06 21:25:32 -08:00
blame.c Merge branch 'ja/i18n-common-messages' 2022-02-25 15:47:35 -08:00
branch.c Merge branch 'gc/branch-recurse-submodules' 2022-02-18 13:53:29 -08:00
bugreport.c hook-list.h: add a generated list of hooks, like config-list.h 2021-09-27 09:44:54 -07:00
bundle.c bundle: call strvec_clear() on allocated strvec 2022-03-04 13:24:18 -08:00
cat-file.c Merge branch 'jc/cat-file-batch-default-format-optim' 2022-03-23 14:09:31 -07:00
check-attr.c
check-ignore.c
check-mailmap.c
check-ref-format.c
checkout--worker.c pkt-line.[ch]: remove unused packet_read_line_buf() 2021-10-15 13:09:40 -07:00
checkout-index.c checkout-index: integrate with sparse index 2022-01-13 13:49:45 -08:00
checkout.c Merge branch 'ab/object-file-api-updates' 2022-03-16 17:53:08 -07:00
clean.c Merge branch 'vd/sparse-clean-etc' 2022-02-17 16:25:05 -08:00
clone.c clone: use remote branch if it matches default HEAD 2022-07-07 20:57:54 -07:00
column.c column: fix parsing of the '--nl' option 2021-08-26 14:36:27 -07:00
commit-graph.c commit-graph: fix memory leak in misused string_list API 2022-03-04 13:24:18 -08:00
commit-tree.c use xopen() to handle fatal open(2) failures 2021-08-25 14:39:08 -07:00
commit.c hooks: fix an obscure TOCTOU "did we just run a hook?" race 2022-03-07 13:00:53 -08:00
config.c Merge branch 'mf/fix-type-in-config-h' 2022-03-16 17:53:07 -07:00
count-objects.c i18n: remove from i18n strings that do not hold translatable parts 2022-02-04 13:58:28 -08:00
credential-cache--daemon.c
credential-cache.c credential-cache: check for windows specific errors 2021-09-14 09:30:54 -07:00
credential-store.c
credential.c doc: fix git credential synopsis 2021-10-28 09:57:09 -07:00
describe.c i18n: turn even more messages into "cannot be used together" ones 2022-01-05 13:31:00 -08:00
diff-files.c
diff-index.c diff-index: restore -c/--cc options handling 2021-09-07 11:11:35 -07:00
diff-tree.c 2.36 gitk/diff-tree --stdin regression fix 2022-04-26 09:26:35 -07:00
diff.c builtin/diff.c: fix "git-diff" usage string typo 2022-02-02 11:30:53 -08:00
difftool.c i18n: factorize more 'incompatible options' messages 2022-02-04 13:58:28 -08:00
env--helper.c
fast-export.c Merge branch 'rs/fast-export-pathspec-fix' into maint 2022-05-05 14:36:25 -07:00
fast-import.c Merge branch 'ns/core-fsyncmethod' 2022-03-25 16:38:24 -07:00
fetch-pack.c Merge branch 'rc/fetch-refetch' 2022-04-04 10:56:23 -07:00
fetch.c Merge branch 'rc/fetch-refetch' 2022-04-04 10:56:23 -07:00
fmt-merge-msg.c merge: allow to pretend a merge is made into a different branch 2021-12-20 14:55:02 -08:00
for-each-ref.c for-each-ref: delay parsing of --sort=<atom> options 2021-10-20 14:33:07 -07:00
for-each-repo.c
fsck.c run-command API users: use strvec_pushl(), not argv construction 2021-11-25 22:15:07 -08:00
fsmonitor--daemon.c fsmonitor--daemon: use a cookie file to sync with file system 2022-03-25 16:04:17 -07:00
gc.c builtin/gc.c: delete duplicate include 2022-03-13 22:23:16 +00:00
get-tar-commit-id.c
grep.c Merge branch 'ab/object-file-api-updates' 2022-03-16 17:53:08 -07:00
hash-object.c Merge branch 'ab/object-file-api-updates' 2022-03-16 17:53:08 -07:00
help.c Merge branch 'ab/help-fixes' 2022-03-09 13:38:24 -08:00
hook.c git hook run: add an --ignore-missing flag 2022-01-07 15:19:34 -08:00
index-pack.c Merge branch 'ns/core-fsyncmethod' 2022-03-25 16:38:24 -07:00
init-db.c i18n: refactor "foo and bar are mutually exclusive" 2022-01-05 13:29:23 -08:00
interpret-trailers.c
log.c Merge branch 'rs/format-patch-pathspec-fix' into maint 2022-05-05 14:36:25 -07:00
ls-files.c ls-files: support --recurse-submodules --stage 2022-02-23 16:41:55 -08:00
ls-remote.c ls-remote & transport API: release "struct transport_ls_refs_options" 2022-02-06 18:02:34 -08:00
ls-tree.c Merge branch 'tl/ls-tree-oid-only' 2022-04-06 15:21:59 -07:00
mailinfo.c
mailsplit.c am/apply: warn if we end up reading patches from terminal 2022-03-03 14:00:32 -08:00
merge-base.c merge-base: free() allocated "struct commit **" list 2022-03-04 13:24:17 -08:00
merge-file.c xdiff: implement a zealous diff3, or "zdiff3" 2021-12-01 14:45:58 -08:00
merge-index.c
merge-ours.c
merge-recursive.c gettext API users: don't explicitly cast ngettext()'s "n" 2022-03-07 11:57:52 -08:00
merge-tree.c
merge.c hooks: fix an obscure TOCTOU "did we just run a hook?" race 2022-03-07 13:00:53 -08:00
mktag.c Merge branch 'ab/object-file-api-updates' 2022-03-16 17:53:08 -07:00
mktree.c Merge branch 'ab/object-file-api-updates' 2022-03-16 17:53:08 -07:00
multi-pack-index.c multi-pack-index: use --object-dir real path 2022-04-25 11:31:12 -07:00
mv.c mv: refuse to move sparse paths 2021-09-28 10:31:02 -07:00
name-rev.c Merge branch 'rs/name-rev-fix-free-after-use' into maint 2022-05-05 14:36:24 -07:00
notes.c Merge branch 'ab/object-file-api-updates' 2022-03-16 17:53:08 -07:00
pack-objects.c Merge branch 'ds/partial-bundle-more' 2022-04-04 10:56:21 -07:00
pack-redundant.c
pack-refs.c
patch-id.c patch-id: fix scan_hunk_header on diffs with 1 line of before/after 2022-02-02 11:24:23 -08:00
prune-packed.c i18n: remove from i18n strings that do not hold translatable parts 2022-02-04 13:58:28 -08:00
prune.c Merge branch 'ns/tmp-objdir' 2022-01-03 16:24:15 -08:00
pull.c Merge branch 'ja/i18n-common-messages' 2022-02-25 15:47:35 -08:00
push.c i18n: factorize "invalid value" messages 2022-02-04 13:58:28 -08:00
range-diff.c
read-tree.c read-tree: make three-way merge sparse-aware 2022-03-01 12:36:01 -08:00
rebase.c rebase: use correct base for --keep-base when a branch is given 2022-04-21 09:35:45 -07:00
receive-pack.c Merge branch 'ab/string-list-count-in-size-t' 2022-03-16 17:53:09 -07:00
reflog.c reflog: fix 'show' subcommand's argv 2022-03-28 15:45:46 -07:00
remote-ext.c
remote-fd.c
remote.c Merge branch 'tb/rename-remote-progress' 2022-03-16 17:53:08 -07:00
repack.c repack: add config to skip updating server info 2022-03-14 22:25:13 +00:00
replace.c Merge branch 'ab/object-file-api-updates' 2022-03-16 17:53:08 -07:00
rerere.c
reset.c reset: show --no-refresh in the short-help 2022-03-24 13:36:21 -07:00
rev-list.c Merge branch 'ds/partial-bundles' 2022-03-21 15:14:24 -07:00
rev-parse.c refs: drop "broken" flag from for_each_fullref_in() 2021-09-27 12:36:45 -07:00
revert.c Merge branch 'ds/mergies-with-sparse-index' 2021-09-20 15:20:45 -07:00
rm.c Merge branch 'ja/i18n-similar-messages' 2022-01-10 11:52:56 -08:00
send-pack.c i18n: factorize "invalid value" messages 2022-02-04 13:58:28 -08:00
shortlog.c string-list API: change "nr" and "alloc" to "size_t" 2022-03-07 12:02:04 -08:00
show-branch.c Merge branch 'jc/show-branch-g-current' into maint 2022-06-08 14:27:51 -07:00
show-index.c
show-ref.c
sparse-checkout.c Merge branch 'ep/remove-duplicated-includes' 2022-03-23 14:09:30 -07:00
stash.c Merge branch 'vd/stash-silence-reset' 2022-03-30 18:01:10 -07:00
stripspace.c i18n: remove from i18n strings that do not hold translatable parts 2022-02-04 13:58:28 -08:00
submodule--helper.c Merge branch 'gc/submodule-update-part2' into maint 2022-05-05 14:36:24 -07:00
symbolic-ref.c
tag.c Merge branch 'ab/object-file-api-updates' 2022-03-16 17:53:08 -07:00
unpack-file.c
unpack-objects.c object-file API: have hash_object_file() take "enum object_type" 2022-02-25 17:16:32 -08:00
update-index.c fsmonitor: config settings are repository-specific 2022-03-25 16:04:15 -07:00
update-ref.c update-ref: fix streaming of status updates 2021-09-03 11:35:15 -07:00
update-server-info.c i18n: remove from i18n strings that do not hold translatable parts 2022-02-04 13:58:28 -08:00
upload-archive.c upload-archive: use regular "struct child_process" pattern 2021-11-25 22:15:07 -08:00
upload-pack.c
var.c var: add GIT_DEFAULT_BRANCH variable 2021-11-03 13:25:36 -07:00
verify-commit.c
verify-pack.c
verify-tag.c
worktree.c Merge branch 'pw/worktree-list-with-z' 2022-04-04 10:56:25 -07:00
write-tree.c