"git branch" and "git checkout -b" now honor --track option even when
the upstream branch is local.  Previously --track was silently ignored
when forking from a local branch.  Also the command did not error out
when --track was explicitly asked for but the forked point specified
was not an existing branch (i.e. when there is no way to set up the
tracking configuration), but now it correctly does.

The configuration setting branch.autosetupmerge can now be set to
"always", which is equivalent to using --track from the command line.
Setting branch.autosetupmerge to "true" will retain the former behavior
of only setting up branch.*.merge for remote upstream branches.

Includes test cases for the new functionality.
Signed-off-by: NJay Soffian <jaysoffian@gmail.com>
Signed-off-by: NJunio C Hamano <gitster@pobox.com>

This patch cleans up some complicated code, and replaces it with a
cleaner version, using code from remote.[ch], which got extended a
little in the process.  This also enables us to fix two cases:

The earlier "fix" to setup tracking only when the original ref started
with "refs/remotes" is wrong.  You are absolutely allowed to use a
separate layout for your tracking branches.  The correct fix, of course,
is to set up tracking information only when there is a matching
remote.<nick>.fetch line containing a colon.

Another corner case was not handled properly.  If two remotes write to
the original ref, just warn the user and do not set up tracking.
Signed-off-by: NJohannes Schindelin <johannes.schindelin@gmx.de>
Signed-off-by: NJunio C Hamano <gitster@pobox.com>

Junio noticed that switching on autosetupmerge unilaterally started
cluttering the config for local branches.  That is not the original
intention of branch.autosetupmerge, which was meant purely for
convenience when branching off of remote branches, but that semantics
got lost somewhere.

If you still want that "new" behavior, you can switch
branch.autosetupmerge to the value "all".  Otherwise, it is interpreted
as a boolean, which triggers setting up defaults _only_ when branching
off of a remote branch, i.e. the originally intended behavior.
Signed-off-by: NJohannes Schindelin <johannes.schindelin@gmx.de>
Signed-off-by: NJunio C Hamano <gitster@pobox.com>

This uses the remove-dashes target to replace "git-frotz" to "git frotz".
Signed-off-by: NJunio C Hamano <gitster@pobox.com>

The original code did not take hierarchical branch names into account at all.

[jc: cherry-picked 11f68d90 from 'master']
Tested-by: NGerrit Pape <pape@smarden.org>
Signed-off-by: NJunio C Hamano <gitster@pobox.com>

When deleting branches, remove the sections referring to these branches
from the config file.
Signed-off-by: NGerrit Pape <pape@smarden.org>

The original code did not take hierarchical branch names into account at all.
Tested-by: NGerrit Pape <pape@smarden.org>
Signed-off-by: NJunio C Hamano <gitster@pobox.com>

Signed-off-by: NJunio C Hamano <junkio@cox.net>

The renaming without config test changed a branch from q to Q, which
fails on non-case sensitive file systems.  Change the test to use q
and q2.
Signed-off-by: NJunio C Hamano <junkio@cox.net>

Make git_config_rename_section return success if no config file
exists.  Otherwise, renaming a branch would abort, leaving the
repository in an inconsistent state.

[jc: test]
Signed-off-by: NGeert Bosch <bosch@gnat.com>
Signed-off-by: NJunio C Hamano <junkio@cox.net>

This patch adds support for a dummy remote '.' to avoid having
to declare a fake remote like

        [remote "local"]
                url = .
                fetch = refs/heads/*:refs/heads/*

Such a builtin remote simplifies the operation of "git-fetch",
which will populate FETCH_HEAD but will not pretend that two
repositories are in use, will not create a thin pack, and will
not perform any useless remapping of names.  The speed
improvement is around 20%, and it should improve more if
"git-fetch" is converted to a builtin.

To this end, git-parse-remote is grown with a new kind of
remote, 'builtin'.  In git-fetch.sh, we treat the builtin remote
specially in that it needs no pack/store operations.  In fact,
doing git-fetch on a builtin remote will simply populate
FETCH_HEAD appropriately.

The patch also improves of the --track/--no-track support,
extending it so that branch.<name>.remote items referring '.'
can be created.  Finally, it fixes a typo in git-checkout.sh.
Signed-off-by: NPaolo Bonzini  <bonzini@gnu.org>
Signed-off-by: NJunio C Hamano <junkio@cox.net>

In order to track and build on top of a branch 'topic' you track from
your upstream repository, you often would end up doing this sequence:

  git checkout -b mytopic origin/topic
  git config --add branch.mytopic.remote origin
  git config --add branch.mytopic.merge refs/heads/topic

This would first fork your own 'mytopic' branch from the 'topic'
branch you track from the 'origin' repository; then it would set up two
configuration variables so that 'git pull' without parameters does the
right thing while you are on your own 'mytopic' branch.

This commit adds a --track option to git-branch, so that "git
branch --track mytopic origin/topic" performs the latter two actions
when creating your 'mytopic' branch.

If the configuration variable branch.autosetupmerge is set to true, you
do not have to pass the --track option explicitly; further patches in
this series allow setting the variable with a "git remote add" option.
The configuration variable is off by default, and there is a --no-track
option to countermand it even if the variable is set.
Signed-off-by: NPaolo Bonzini  <bonzini@gnu.org>
Signed-off-by: NJunio C Hamano <junkio@cox.net>

Signed-off-by: NTom Prince <tom.prince@ualberta.net>
Signed-off-by: NJunio C Hamano <junkio@cox.net>

When switching branches with "git checkout", we internally did $arg^0
(aka $arg^{commit}) suffix but there was no need to.

The improvement is easily visible in the change to an existing
test t/3200-branch.sh in this commit; it was expecting rather
ugly message.
Signed-off-by: NJunio C Hamano <junkio@cox.net>

When renaming a branch, the corresponding config section should
be renamed, too.
Signed-off-by: NJohannes Schindelin <johannes.schindelin@gmx.de>
Signed-off-by: NJunio C Hamano <junkio@cox.net>

The current check for symlinked reflogs was based on stat(2), which is
utterly embarrassing.

Fix it, and add a matching testcase.
Signed-off-by: NLars Hjemli <hjemli@gmail.com>
Signed-off-by: NJunio C Hamano <junkio@cox.net>

Extend git-branch with the following options:

  git-branch -m|-M [<oldbranch>] newbranch

The -M variation is required to force renaming over an exsisting
branchname.

This also indroduces $GIT_DIR/RENAME_REF which is a "metabranch"
used when renaming branches. It will always hold the original sha1
for the latest renamed branch.

Additionally, if $GIT_DIR/logs/RENAME_REF exists, all branch rename
events are logged there.

Finally, some testcases are added to verify the new options.
Signed-off-by: NLars Hjemli <hjemli@gmail.com>
Signed-off-by: NJunio C Hamano <junkio@cox.net>

The test expected "git branch --help" to exit successfully, but
built-ins spawn "man" when given --help, and when the test is
run, manpages may not be installed yet and "man" can legally
exit non-zero in such a case.

Also the new implementation logs "Created from master", instead
of "Created from HEAD" in the reflog, which makes a lot more
sense, so adjust the test to match that.
Signed-off-by: NJunio C Hamano <junkio@cox.net>

This patch also adds test cases from Linus and Junio.
Signed-off-by: NChristian Couder <chriscool@tuxfamily.org>
Signed-off-by: NJunio C Hamano <junkio@cox.net>

If the user supplies -l to git-branch when creating a new branch
then the new branch's log should be created automatically and the
branch creation should be logged in that log.

Further if a branch is being deleted and it had a log then also
verify that the log was deleted.

Test git-checkout -b foo -l for creating a new branch foo with a
log and checking out that branch.

Fixed git-checkout -b foo -l as the branch variable name was
incorrect in the script.
Signed-off-by: NShawn O. Pearce <spearce@spearce.org>
Signed-off-by: NJunio C Hamano <junkio@cox.net>

Signed-off-by: NJunio C Hamano <junkio@cox.net>

Make git-update-ref create references with slashes in them. git-branch
and git-checkout already support such reference names.

git-branch can use git-update-ref to create the references in a more
formal manner now.
Signed-off-by: NJunio C Hamano <junkio@cox.net>

Earlier we renamed git-foo.sh to git-foo while installing, which
was mostly done by inertia than anything else.  This however
made writing tests to use scripts harder.

This patch builds the scripts the same way as we build binaries
from their sources.  As a side effect, you can now specify
non-standard paths you have your Perl binary is in when running
the make.
Signed-off-by: NJunio C Hamano <junkio@cox.net>

If you run `git branch --help', you will unexpectedly have created a new
branch named "--help".  This simple patch adds logic and a usage
statement to catch this and similar problems, and adds a testcase for it.
Signed-off-by: NAmos Waterland <apw@rossby.metr.ou.edu>
Signed-off-by: NJunio C Hamano <junkio@cox.net>