In 1.7.9 era, we taught "git rebase" about the raw timestamp format
but we did not teach the same trick to "filter-branch", which rolled
a similar logic on its own.

* jc/maint-filter-branch-epoch-date:
  t7003: add test to filter a branch with a commit at epoch
  date.c: Fix off by one error in object-header date parsing
  filter-branch: do not forget the '@' prefix to force git-timestamp

Signed-off-by: NJunio C Hamano <gitster@pobox.com>

The error message from "git push $there :bogo" (and its equivalent
"git push $there --delete bogo") mentioned that we tried and failed
to guess what ref is being deleted based on the LHS of the refspec,
which we don't.

* jk/push-delete-ref-error-message:
  push: don't guess at qualifying remote refs on deletion

A handful of files and directories we create had tighter than
necessary permission bits when the user wanted to have group
writability (e.g. by setting "umask 002").

* ar/clone-honor-umask-at-top:
  add: create ADD_EDIT.patch with mode 0666
  rerere: make rr-cache fanout directory honor umask
  Restore umasks influence on the permissions of work tree created by clone

"commit --amend" used to refuse amending a commit with an empty log
message, with or without "--allow-empty-message".

* cw/amend-commit-without-message:
  Allow edit of empty message with commit --amend

"git commit --amend --only --" was meant to allow "Clever" people to
rewrite the commit message without making any change even when they
have already changes for the next commit added to their index, but
it never worked as advertised since it was introduced in 1.3.0 era.

* jk/maint-commit-amend-only-no-paths:
  commit: fix "--amend --only" with no pathspec

Even though the index can record pathnames longer than 1<<12 bytes,
in some places we were not comparing them in full, potentially
replacing index entries instead of adding.

* tg/maint-cache-name-compare:
  cache_name_compare(): do not truncate while comparing paths

"git show"'s auto-walking behaviour was an unreliable and
unpredictable hack; it now behaves just like "git log" does when it
walks.

* tr/maint-show-walk:
  show: fix "range implies walking"
  Demonstrate git-show is broken with ranges

"git diff", "git status" and anything that internally uses the
comparison machinery was utterly broken when the difference
involved a file with "-" as its name.  This was due to the way "git
diff --no-index" was incorrectly bolted on to the system, making
any comparison that involves a file "-" at the root level
incorrectly read from the standard input.

* jc/refactor-diff-stdin:
  diff-index.c: "git diff" has no need to read blob from the standard input
  diff-index.c: unify handling of command line paths
  diff-index.c: do not pretend paths are pathspecs

We did not have test to make sure "git rebase" without extra options
filters out an empty commit in the original history.

* mz/empty-rebase-test:
  add test case for rebase of empty commit

"git fast-export" produced an input stream for fast-import without
properly quoting pathnames when they contain SPs in them.

* js/fast-export-paths-with-spaces:
  fast-export: quote paths with spaces

"git checkout --detach", when you are still on an unborn branch,
should be forbidden, but it wasn't.

* cw/no-detaching-an-unborn:
  git-checkout: disallow --detach on unborn branch

Some implementations of Perl terminates "lines" with CRLF even when
the script is operating on just a sequence of bytes.  Make sure to
use "$PERL_PATH", the version of Perl the user told Git to use, in
our tests to avoid unnecessary breakages in tests.

* vr/use-our-perl-in-tests:
  t/README: add a bit more Don'ts
  tests: enclose $PERL_PATH in double quotes
  t/test-lib.sh: export PERL_PATH for use in scripts
  t: Replace 'perl' by $PERL_PATH

Running filter-branch on a history that has a commit with timestamp
at epoch used to fail, but it should have been fixed.  Add test to
make sure it won't break again.
Signed-off-by: NJunio C Hamano <gitster@pobox.com>

It is perfectly OK for a valid decimal integer to begin with '9' but
116eb3ab (parse_date(): allow ancient git-timestamp, 2012-02-02) did
not express the range correctly.
Signed-off-by: NJunio C Hamano <gitster@pobox.com>

Signed-off-by: NJunio C Hamano <gitster@pobox.com>

"git blame" did not try to make sure that the abbreviated commit
object names in its output are unique.

* jc/maint-blame-unique-abbrev:
  blame: compute abbreviation width that ensures uniqueness

On Cygwin, the platform pread(2) is not thread safe, just like our own
compat/ emulation, and cannot be used in the index-pack program.
Makefile variable NO_THREAD_SAFE_PREAD can be defined to avoid use of
this function in a threaded program.

* rj/platform-pread-may-be-thread-unsafe:
  index-pack: Disable threading on cygwin

"git diff --no-index" did not correctly handle relative paths and
did not correctly give exit codes when run under "--quiet" option.

* th/diff-no-index-fixes:
  diff-no-index: exit(1) if 'diff --quiet <repo file> <external file>' finds changes
  diff: handle relative paths in no-index

"git clone --single-branch" to clone a single branch did not limit
the cloning to the specified branch.

* nd/clone-single-fix:
  clone: fix ref selection in --single-branch --branch=xxx

When "git log" gets "--simplify-merges/by-decoration" together with
"--first-parent", the combination of these options makes the
simplification logic to use in-core commit objects that haven't been
examined for relevance, either producing incorrect result or taking
too long to produce any output.  Teach the simplification logic to
ignore commits that the first-parent traversal logic ignored when
both are in effect to work around the issue.

* jc/rev-list-simplify-merges-first-parent:
  revision: ignore side parents while running simplify-merges
  revision: note the lack of free() in simplify_merges()
  revision: "simplify" options imply topo-order sort

"git add" allows adding a regular file to the path where a submodule
used to exist, but "git update-index" did not allow an equivalent
operation to Porcelain writers.

* hv/submodule-update-nuke-submodules:
  update-index: allow overwriting existing submodule index entries

"git diff --no-index" did not work with pagers correctly.

* jk/diff-no-index-pager:
  do not run pager with diff --no-index --quiet
  fix pager.diff with diff --no-index

"git diff COPYING HEAD:COPYING" gave a nonsense error message that
claimed that the treeish HEAD did not have COPYING in it.

* mm/verify-filename-fix:
  verify_filename(): ask the caller to chose the kind of diagnosis
  sha1_name: do not trigger detailed diagnosis for file arguments

The documentation for "git cherry-pick A B..C" was misleading.

* cn/cherry-pick-range-docs:
  git-cherry-pick.txt: clarify the use of revision range notation
  Documentation: --no-walk is no-op if range is specified

"git archive" incorrectly computed the header checksum; the symptom
was observed only when using pathnames with hi-bit set.

* jc/ustar-checksum-is-unsigned:
  archive: ustar header checksum is computed unsigned

Running "git bundle verify" on a bundle that records a complete
history said "it requires these 0 commits".

* jc/bundle-complete-notice:
  tweak "bundle verify" of a complete history

"git ls-files --exclude=t -i" did not consider anything under t/ as
excluded, as it did not pay attention to exclusion of leading paths
while walking the index.  Other two users of excluded() are also
updated.

* jc/ls-files-i-dir:
  dir.c: make excluded() file scope static
  unpack-trees.c: use path_excluded() in check_ok_to_remove()
  builtin/add.c: use path_excluded()
  path_excluded(): update API to less cache-entry centric
  ls-files -i: micro-optimize path_excluded()
  ls-files -i: pay attention to exclusion of leading paths

"git request-pull $url dev" when the tip of "dev" branch was tagged
with "ext4-for-linus" used the contents from the tag in the output
but still asked the "dev" branch to be pulled, not the tag.

* jc/request-pull-match-tagname:
  request-pull: really favor a matching tag

We failed to use ce_namelen() equivalent and instead only compared
up to the CE_NAMEMASK bytes by mistake.  Adding an overlong path
that shares the same common prefix as an existing entry in the index
did not add a new entry, but instead replaced the existing one, as
the result.
Signed-off-by: NJunio C Hamano <gitster@pobox.com>

When we do not have any pathspec, we typically disallow an
explicit "--only", because it makes no sense (your commit
would, by definition, be empty). But since 6a74642c
(git-commit --amend: two fixes., 2006-04-20), we have
allowed "--amend --only" with the intent that it would amend
the commit, ignoring any contents staged in the index.

However, while that commit allowed the combination, we never
actually implemented the logic to make it work. The current
code notices that we have no pathspec and assumes we want to
do an as-is commit (i.e., the "--only" is ignored).

Instead, we must make sure to follow the partial-commit
code-path. We also need to tweak the list_paths function to
handle a NULL pathspec.
Signed-off-by: NJeff King <peff@peff.net>
Signed-off-by: NJunio C Hamano <gitster@pobox.com>

We should be letting the user's umask take care of
restricting permissions. Even though this is a temporary
file and probably nobody would notice, this brings us in
line with other temporary file creations in git (e.g.,
choosing "e"dit from git-add--interactive).
Signed-off-by: NJeff King <peff@peff.net>
Signed-off-by: NJunio C Hamano <gitster@pobox.com>

For some reason, this script reinvents, instead of refactoring the
existing one in git-sh-setup, the logic to grab ident information
from an existing commit; it was missed when the corresponding logic
in git-sh-setup was updated with 2c733fb2 (parse_date(): '@' prefix
forces git-timestamp, 2012-02-02).

Teach the script that it is OK to have a way ancient timestamp in
the commits that are being filtered.
Signed-off-by: NJunio C Hamano <gitster@pobox.com>

This is the last remaining call to mkdir(2) that restricts the permission
bits by passing 0755.  Just use the same mkdir_in_gitdir() used to create
the leaf directories.
Signed-off-by: NJunio C Hamano <gitster@pobox.com>

The original version of the git-clone just used mkdir(1) to create
the working directories.  The version rewritten in C creates all
directories inside the working tree by using the mode argument of
0777 when calling mkdir(2) to let the umask take effect.

But the top-level directory of the working tree is created by
passing the mode argument of 0755 to mkdir(2), which results in an
overly tight restriction if the user wants to make directories group
writable with a looser umask like 002.
Signed-off-by: NAlex Riesen <raa.lkml@gmail.com>
Signed-off-by: NJunio C Hamano <gitster@pobox.com>

"git commit --amend" used on a commit with an empty message fails
unless -m is given, whether or not --allow-empty-message is
specified.

Allow it to proceed to the editor with an empty commit message.
Unless --allow-empty-message is in force, it will still abort later
if an empty message is saved from the editor (this check was
already necessary to prevent a non-empty commit message being edited
to an empty one).

Add a test for --amend --edit of an empty commit message which fails
without this fix, as it's a rare case that won't get frequently
tested otherwise.
Signed-off-by: NChris Webb <chris@arachsys.com>
Signed-off-by: NJunio C Hamano <gitster@pobox.com>

When we try to push a ref and the right-hand side of the
refspec does not find a match, we try to create it. If it is
not fully qualified, we try to guess where it would go in
the refs hierarchy based on the left-hand source side. If
the source side is not a ref, then we give up and give a
long explanatory message.

For deletions, however, this doesn't make any sense. We
would never want to create on the remote side, and if an
unqualified ref can't be matched, it is simply an error. The
current code handles this already because the left-hand side
is empty, and therefore does not give us a hint as to where
the right-hand side should go, and we properly error out.
Unfortunately, the error message is the long "we tried to
qualify this, but the source side didn't let us guess"
message, which is quite confusing.

Instead, we can just be more succinct and say "we can't
delete this because we couldn't find it". So before:

  $ git push origin :bogus
  error: unable to push to unqualified destination: bogus
  The destination refspec neither matches an existing ref on the remote nor
  begins with refs/, and we are unable to guess a prefix based on the source ref.
  error: failed to push some refs to '$URL'

and now:

  $ git push origin :bogus
  error: unable to delete 'bogus': remote ref does not exist
  error: failed to push some refs to '$URL'

It is tempting to also catch a fully-qualified ref like
"refs/heads/bogus" and generate the same error message.
However, that currently does not error out at all, and
instead gets sent to the remote side, which typically
generates a warning:

  $ git push origin:refs/heads/bogus
  remote: warning: Deleting a non-existent ref.
  To $URL
   - [deleted]         bogus

While it would be nice to catch this error early, a
client-side error would mean aborting the push entirely and
changing push's exit code. For example, right now you can
do:

  $ git push origin refs/heads/foo refs/heads/bar

and end up in a state where "foo" and "bar" are deleted,
whether both of them currently exist or not (and see an
error only if we actually failed to contact the server).
Generating an error would cause a regression for this use
case.
Signed-off-by: NJeff King <peff@peff.net>
Signed-off-by: NJunio C Hamano <gitster@pobox.com>

Update Swedish translation (1066t0f0u)

Julia Lawall noticed that in linux-next repository the commit object
60d5c9f5 (shown with the default abbreviation width baked into "git
blame") in output from

  $ git blame -L 3675,3675 60d5c9f5b -- \
      drivers/staging/brcm80211/brcmfmac/wl_iw.c

is no longer unique in the repository, which results in "short SHA1
60d5c9f5 is ambiguous".

Compute the minimum abbreviation width that ensures uniqueness when
the user did not specify the --abbrev option to avoid this.
Signed-off-by: NJunio C Hamano <gitster@pobox.com>

Signed-off-by: NPeter Krefting <peter@softwolves.pp.se>