Commit Graph

3679 Commits

Author SHA1 Message Date
Junio C Hamano
d9c82fa7a7 Merge branch 'pt/xdg-config-path' into maint
Code clean-up for xdg configuration path support.

* pt/xdg-config-path:
  path.c: remove home_config_paths()
  git-config: replace use of home_config_paths()
  git-commit: replace use of home_config_paths()
  credential-store.c: replace home_config_paths() with xdg_config_home()
  dir.c: replace home_config_paths() with xdg_config_home()
  attr.c: replace home_config_paths() with xdg_config_home()
  path.c: implement xdg_config_home()
  t0302: "unreadable" test needs POSIXPERM
  t0302: test credential-store support for XDG_CONFIG_HOME
  git-credential-store: support XDG_CONFIG_HOME
  git-credential-store: support multiple credential files
2015-06-05 12:00:04 -07:00
Junio C Hamano
1e6c8babf8 Merge branch 'jc/hash-object' into maint
"hash-object --literally" introduced in v2.2 was not prepared to
take a really long object type name.

* jc/hash-object:
  write_sha1_file(): do not use a separate sha1[] array
  t1007: add hash-object --literally tests
  hash-object --literally: fix buffer overrun with extra-long object type
  git-hash-object.txt: document --literally option
2015-05-26 13:49:25 -07:00
Junio C Hamano
a60abe10f2 Merge branch 'jk/init-core-worktree-at-root' into maint
We avoid setting core.worktree when the repository location is the
".git" directory directly at the top level of the working tree, but
the code misdetected the case in which the working tree is at the
root level of the filesystem (which arguably is a silly thing to
do, but still valid).

* jk/init-core-worktree-at-root:
  init: don't set core.worktree when initializing /.git
2015-05-13 14:05:49 -07:00
Junio C Hamano
c99fec6e35 Sync with 2.3.8
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2015-05-11 14:39:28 -07:00
Junio C Hamano
1add9aed85 Merge branch 'oh/fix-config-default-user-name-section' into maint-2.3
The default $HOME/.gitconfig file created upon "git config --global"
that edits it had incorrectly spelled user.name and user.email
entries in it.

* oh/fix-config-default-user-name-section:
  config: fix settings in default_user_config template
2015-05-11 14:33:59 -07:00
Paul Tan
509adc3352 git-config: replace use of home_config_paths()
Since home_config_paths() combines distinct functionality already
implemented by expand_user_path() and xdg_config_home(), and hides the
home config file path ~/.gitconfig. Make the code more explicit by
replacing the use of home_config_paths() with expand_user_path() and
xdg_config_home().

Signed-off-by: Paul Tan <pyokagan@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2015-05-06 11:33:48 -07:00
Paul Tan
e682c9db1a git-commit: replace use of home_config_paths()
Since home_config_paths() combines two distinct functionality already
implemented by expand_user_path() and xdg_config_home(), and hides the
home config file path ~/.gitconfig. Make the code more explicit by
replacing the use of home_config_paths() with expand_user_path() and
xdg_config_home().

Signed-off-by: Paul Tan <pyokagan@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2015-05-06 11:33:42 -07:00
Eric Sunshine
0c3db67cc8 hash-object --literally: fix buffer overrun with extra-long object type
"hash-object" learned in 5ba9a93 (hash-object: add --literally
option, 2014-09-11) to allow crafting a corrupt/broken object of
unknown type.

When the user-provided type is particularly long, however, it can
overflow the relatively small stack-based character array handed to
write_sha1_file_prepare() by hash_sha1_file() and write_sha1_file(),
leading to stack corruption (and crash).  Introduce a custom helper
to allow arbitrarily long typenames just for "hash-object --literally".

[jc: Eric's original used a strbuf in the more common codepaths, and
I rewrote it to avoid penalizing the non-literally code. Bugs are mine]

Signed-off-by: Eric Sunshine <sunshine@sunshineco.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2015-05-05 10:14:18 -07:00
Junio C Hamano
7ff140202a Merge branch 'ps/grep-help-all-callback-arg'
Code clean-up.

* ps/grep-help-all-callback-arg:
  grep: correctly initialize help-all option
2015-04-20 15:28:34 -07:00
Ossi Herrala
7e11052442 config: fix settings in default_user_config template
The name (not user) and email setting should be in config section
"user" and not in "core" as documented in Documentation/config.txt.

Signed-off-by: Ossi Herrala <oherrala@gmail.com>
Reviewed-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2015-04-17 10:32:46 -07:00
Junio C Hamano
3d6bc9a763 Revert "merge: pass verbosity flag down to merge-recursive"
This reverts commit 2bf15a3330, whose
intention was good, but the verbosity levels used in merge-recursive
turns out to be rather uneven.  For example, a merge of two branches
with conflicting submodule updates used to report CONFLICT: output
with --quiet but no longer (which *is* desired), while the final
"Automatic merge failed; fix conflicts and then commit" message is
still shown even with --quiet (which *is* inconsistent).

Originally reported by Bryan Turner; it is too early to declare what
the concensus is, but it seems that we would need to level the
verbosity levels used in merge strategy backends before we can go
forward.  In the meantime, we'd revert to the old behaviour until
that happens.

cf. $gmane/267245
2015-04-16 08:03:14 -07:00
Junio C Hamano
3cdff83fb0 Merge branch 'jk/merge-quiet'
"git merge --quiet" did not squelch messages from the underlying
merge-recursive strategy.

* jk/merge-quiet:
  merge: pass verbosity flag down to merge-recursive
2015-04-14 11:49:12 -07:00
Junio C Hamano
fa9aaa8f10 Merge branch 'jc/update-instead-into-void'
A push into an unborn branch, with "receive.denyCurrentBranch" set
to "updateInstead", did not check out the working tree as expected.

* jc/update-instead-into-void:
  push-to-deploy: allow pushing into an unborn branch and updating it
2015-04-14 11:49:10 -07:00
Patrick Steinhardt
5dcd1b1577 grep: correctly initialize help-all option
The "help-all" option is being initialized with a wrong value.
While being semantically wrong this can also cause a segmentation
fault in gcc on ARMv7 hardfloat platforms with a hardened
toolchain. Fix this by initializing with a NULL value.

Signed-off-by: Patrick Steinhardt <ps@pks.im>
Reviewed-by: René Scharfe <l.s.r@web.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2015-04-12 22:46:28 -07:00
Jeff King
2bf15a3330 merge: pass verbosity flag down to merge-recursive
This makes "git merge --quiet" really quiet when we call
into merge-recursive.

Note that we can't just pass our flag down as-is; the two
parts of the code use different scales. We center at "0" as
normal for git-merge (with "--quiet" giving a negative
value), but merge-recursive uses "2" as its center.  This
patch passes a negative value to merge-recursive rather than
"1", though, as otherwise the user would have to use "-qqq"
to squelch all messages (but the downside is that the user
cannot distinguish between levels 0-2 if without resorting
to the GIT_MERGE_VERBOSITY variable).

We may want to review and renormalize the message severities
in merge-recursive, but that does not have to happen now.
This is at least in improvement in the sense that we are
respecting "--quiet" at all.

Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2015-04-02 15:12:39 -07:00
Jeff King
84ccad8dec init: don't set core.worktree when initializing /.git
If you create a git repository in the root directory with
"git init /", we erroneously write a core.worktree entry.
This isn't _wrong_, in the sense that it's OK to set
core.worktree when we don't need to. But it is unnecessarily
surprising if you later move the .git directory to another
path (which usually moves the relative working tree, but is
foiled if there is an explicit worktree set).

The problem is that we check whether core.worktree is
necessary by seeing if we can make the git_dir by
concatenating "/.git" onto the working tree. That would lead
to "//.git" in this instance, but we actually have "/.git"
(without the doubled slash).

We can fix this by special-casing the root directory. I also
split the logic out into its own function to make the
conditional a bit more readable (and used skip_prefix, which
I think makes it a little more obvious what is going on).

No tests, as we would need to be able to write to "/" to do
so. I did manually confirm that:

  sudo git init /
  cd /
  git rev-parse --show-toplevel
  git config core.worktree

still finds the top-level correctly (as "/"), and does not
set any core.worktree variable.

Signed-off-by: Jeff King <peff@peff.net>
Reviewed-by: Jonathan Nieder <jrnieder@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2015-04-02 12:29:15 -07:00
Junio C Hamano
1a51b52422 push-to-deploy: allow pushing into an unborn branch and updating it
Setting receive.denycurrentbranch to updateinstead and pushing into
the current branch, when the working tree and the index is truly
clean, is supposed to reset the working tree and the index to match
the tree of the pushed commit.  This did not work when pushing into
an unborn branch.

The code that drives push-to-checkout hook needs no change, as the
interface is defined so that hook can decide what to do when the
push is coming to an unborn branch and take an appropriate action
since the beginning.

Acked-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2015-04-01 22:40:10 -07:00
Junio C Hamano
ab0fb57aac Merge branch 'jc/report-path-error-to-dir' into maint
Code clean-up.

* jc/report-path-error-to-dir:
  report_path_error(): move to dir.c
2015-03-31 14:53:08 -07:00
Junio C Hamano
b70cec0a2e Merge branch 'ws/grep-quiet-no-pager' into maint
Even though "git grep --quiet" is run merely to ask for the exit
status, we spawned the pager regardless.  Stop doing that.

* ws/grep-quiet-no-pager:
  grep: fix "--quiet" overwriting current output
2015-03-28 09:33:11 -07:00
Junio C Hamano
73d8bfde32 Merge branch 'jk/cleanup-failed-clone' into maint
An failure early in the "git clone" that started creating the
working tree and repository could have resulted in some directories
and files left without getting cleaned up.

* jk/cleanup-failed-clone:
  clone: drop period from end of die_errno message
  clone: initialize atexit cleanup handler earlier
2015-03-28 09:33:09 -07:00
Junio C Hamano
9f389aa492 Merge branch 'jk/prune-with-corrupt-refs' into maint
"git prune" used to largely ignore broken refs when deciding which
objects are still being used, which could spread an existing small
damage and make it a larger one.

* jk/prune-with-corrupt-refs:
  refs.c: drop curate_packed_refs
  repack: turn on "ref paranoia" when doing a destructive repack
  prune: turn on ref_paranoia flag
  refs: introduce a "ref paranoia" flag
  t5312: test object deletion code paths in a corrupted repository
2015-03-28 09:33:06 -07:00
Junio C Hamano
553c622b68 Merge branch 'sb/leaks'
* sb/leaks:
  http: release the memory of a http pack request as well
  read-cache: fix memleak
  add_to_index(): free unused cache-entry
  commit.c: fix a memory leak
  http-push: remove unneeded cleanup
  merge-recursive: fix memleaks
  merge-blobs.c: fix a memleak
  builtin/apply.c: fix a memleak
  update-index: fix a memleak
  read-cache: free cache entry in add_to_index in case of early return
2015-03-27 13:02:32 -07:00
Junio C Hamano
d8279c7d85 Merge branch 'jk/tag-h-column-is-a-listing-option' into maint
"git tag -h" used to show the "--column" and "--sort" options
that are about listing in a wrong section.

* jk/tag-h-column-is-a-listing-option:
  tag: fix some mis-organized options in "-h" listing
2015-03-27 13:00:23 -07:00
Junio C Hamano
574ee8ae86 Merge branch 'jc/report-path-error-to-dir'
Code clean-up.

* jc/report-path-error-to-dir:
  report_path_error(): move to dir.c
2015-03-26 11:57:13 -07:00
Junio C Hamano
05e816e37f Merge branch 'jk/prune-with-corrupt-refs'
"git prune" used to largely ignore broken refs when deciding which
objects are still being used, which could spread an existing small
damage and make it a larger one.

* jk/prune-with-corrupt-refs:
  refs.c: drop curate_packed_refs
  repack: turn on "ref paranoia" when doing a destructive repack
  prune: turn on ref_paranoia flag
  refs: introduce a "ref paranoia" flag
  t5312: test object deletion code paths in a corrupted repository
2015-03-25 12:54:26 -07:00
Junio C Hamano
927936d753 Merge branch 'jk/cleanup-failed-clone'
An failure early in the "git clone" that started creating the
working tree and repository could have resulted in some directories
and files left without getting cleaned up.

* jk/cleanup-failed-clone:
  clone: drop period from end of die_errno message
  clone: initialize atexit cleanup handler earlier
2015-03-25 12:54:24 -07:00
Junio C Hamano
01c057df3f Merge branch 'ws/grep-quiet-no-pager'
Even though "git grep --quiet" is run merely to ask for the exit
status, we spawned the pager regardless.  Stop doing that.

* ws/grep-quiet-no-pager:
  grep: fix "--quiet" overwriting current output
2015-03-25 12:54:20 -07:00
Junio C Hamano
777c55a616 report_path_error(): move to dir.c
The expected call sequence is for the caller to use match_pathspec()
repeatedly on a set of pathspecs, accumulating the "hits" in a
separate array, and then call this function to diagnose a pathspec
that never matched anything, as that can indicate a typo from the
command line, e.g. "git commit Maekfile".

Many builtin commands use this function from builtin/ls-files.c,
which is not a very healthy arrangement.  ls-files might have been
the first command to feel the need for such a helper, but the need
is shared by everybody who uses the "match and then report" pattern.

Move it to dir.c where match_pathspec() is defined.

Signed-off-by: Junio C Hamano <gitster@pobox.com>
2015-03-24 14:12:10 -07:00
Junio C Hamano
61ca378275 Merge branch 'jk/push-config'
Restructure "git push" codepath to make it easier to add new
configuration bits and then add push.followTags configuration that
turns --follow-tags option on by default.

* jk/push-config:
  push: allow --follow-tags to be set by config push.followTags
  cmd_push: pass "flags" pointer to config callback
  cmd_push: set "atomic" bit directly
  git_push_config: drop cargo-culted wt_status pointer
2015-03-23 11:28:14 -07:00
Junio C Hamano
a633651d21 Merge branch 'jk/tag-h-column-is-a-listing-option'
"git tag -h" used to show the "--column" and "--sort" options
that are about listing in a wrong section.

* jk/tag-h-column-is-a-listing-option:
  tag: fix some mis-organized options in "-h" listing
2015-03-23 11:28:02 -07:00
Junio C Hamano
a393c6bfd9 Merge branch 'rs/deflate-init-cleanup' into maint
Code simplification.

* rs/deflate-init-cleanup:
  zlib: initialize git_zstream in git_deflate_init{,_gzip,_raw}
2015-03-23 11:23:38 -07:00
Stefan Beller
5d0b9bf86d commit.c: fix a memory leak
Signed-off-by: Stefan Beller <sbeller@google.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2015-03-23 11:12:58 -07:00
Stefan Beller
f0b1f1ece7 builtin/apply.c: fix a memleak
oldlines is allocated earlier in the function and also freed on the
successful code path.

Signed-off-by: Stefan Beller <sbeller@google.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2015-03-23 11:12:58 -07:00
Stefan Beller
1b7cb8969c update-index: fix a memleak
`old` is not used outside the loop and would get lost
once we reach the goto.

Signed-off-by: Stefan Beller <sbeller@google.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2015-03-22 12:26:31 -07:00
Junio C Hamano
cfe96b38fd Merge branch 'sb/leaks'
Code cleanup.

* sb/leaks:
  builtin/help.c: fix memory leak
  bundle.c: fix memory leak
  connect.c: do not leak "conn" after showing diagnosis
2015-03-20 13:11:53 -07:00
Junio C Hamano
ec0465ade8 Merge branch 'km/bsd-shells'
Portability fixes and workarounds for shell scripts have been added
to help BSD-derived systems.

* km/bsd-shells:
  t5528: do not fail with FreeBSD shell
  help.c: use SHELL_PATH instead of hard-coded "/bin/sh"
  git-compat-util.h: move SHELL_PATH default into header
  git-instaweb: use @SHELL_PATH@ instead of /bin/sh
  git-instaweb: allow running in a working tree subdirectory
2015-03-20 13:11:48 -07:00
Junio C Hamano
38f6ae90de Merge branch 'mg/detached-head-report'
"git branch" on a detached HEAD always said "(detached from xyz)",
even when "git status" would report "detached at xyz".  The HEAD is
actually at xyz and haven't been moved since it was detached in
such a case, but the user cannot read what the current value of
HEAD is when "detached from" is used.

* mg/detached-head-report:
  branch: name detached HEAD analogous to status
  wt-status: refactor detached HEAD analysis
2015-03-20 13:11:46 -07:00
Jeff King
8d42299361 repack: turn on "ref paranoia" when doing a destructive repack
If we are repacking with "-ad", we will drop any unreachable
objects. Likewise, using "-Ad --unpack-unreachable=<time>"
will drop any old, unreachable objects. In these cases, we
want to make sure the reachability we compute with "--all"
is complete. We can do this by passing GIT_REF_PARANOIA=1 in
the environment to pack-objects.

Note that "-Ad" is safe already, because it only loosens
unreachable objects. It is up to "git prune" to avoid
deleting them.

Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2015-03-20 12:41:38 -07:00
Jeff King
ff4056bbc3 prune: turn on ref_paranoia flag
Prune should know about broken objects at the tips of refs,
so that we can feed them to our traversal rather than
ignoring them. It's better for us to abort the operation on
the broken object than it is to start deleting objects with
an incomplete view of the reachability namespace.

Note that for missing objects, aborting is the best we can
do. For a badly-named ref, we technically could use its sha1
as a reachability tip. However, the iteration code just
feeds us a null sha1, so there would be a reasonable amount
of code involved to pass down our wishes. It's not really
worth trying to do better, because this is a case that
should happen extremely rarely, and the message we provide:

  fatal: unable to parse object: refs/heads/bogus:name

is probably enough to point the user in the right direction.

Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2015-03-20 12:40:56 -07:00
Jeff King
16eff6c009 clone: drop period from end of die_errno message
We do not usually end our errors with a full stop, but it
looks especially bad when you use die_errno, which adds a
colon, like:

  fatal: could not create work tree dir 'foo'.: No such file or directory

Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2015-03-19 13:38:36 -07:00
Jeff King
ee0e38727f clone: initialize atexit cleanup handler earlier
If clone fails, we generally try to clean up any directories
we've created. We do this by installing an atexit handler,
so that we don't have to manually trigger cleanup. However,
since we install this after touching the filesystem, any
errors between our initial mkdir() and our atexit() call
will result in us leaving a crufty directory around.

We can fix this by moving our atexit() call earlier. It's OK
to do it before the junk_work_tree variable is set, because
remove_junk makes sure the variable is initialized. This
means we "activate" the handler by assigning to the
junk_work_tree variable, which we now bump down to just
after we call mkdir(). We probably do not want to do it
before, because a plausible reason for mkdir() to fail is
EEXIST (i.e., we are racing with another "git init"), and we
would not want to remove their work.

OTOH, this is probably not that big a deal; we will allow
cloning into an empty directory (and skip the mkdir), which
is already racy (i.e., one clone may see the other's empty
dir and start writing into it). Still, it does not hurt to
err on the side of caution here.

Note that writing into junk_work_tree and junk_git_dir after
installing the handler is also technically racy, as we call
our handler on an async signal.  Depending on the platform,
we could see a sheared write to the variables. Traditionally
we have not worried about this, and indeed we already do
this later in the function. If we want to address that, it
can come as a separate topic.

Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2015-03-19 13:38:07 -07:00
Wilhelm Schuermann
c2048f0b39 grep: fix "--quiet" overwriting current output
When grep is called with the --quiet option, the pager is initialized
despite not being used.  When the pager is "less", anything output by
previous commands and not ended with a newline is overwritten:

    $ echo -n aaa; echo bbb
    aaabbb
    $ echo -n aaa; git grep -q foo; echo bbb
    bbb

This can be worked around, for example, by making sure STDOUT is not a
TTY or more directly by setting git's pager to "cat":

    $ echo -n aaa; git grep -q foo > /dev/null; echo bbb
    aaabbb
    $ echo -n aaa; PAGER=cat git grep -q foo; echo bbb
    aaabbb

But prevent calling the pager in the first place, which would also
save an unnecessary fork().

Signed-off-by: Wilhelm Schuermann <wimschuermann@googlemail.com>
Reviewed-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2015-03-19 11:54:03 -07:00
Junio C Hamano
6902c4da58 Merge branch 'rs/deflate-init-cleanup'
Code simplification.

* rs/deflate-init-cleanup:
  zlib: initialize git_zstream in git_deflate_init{,_gzip,_raw}
2015-03-17 16:01:26 -07:00
Dave Olszewski
a8bc269f11 push: allow --follow-tags to be set by config push.followTags
Signed-off-by: Dave Olszewski <cxreg@pobox.com>
Helped-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2015-03-14 15:08:35 -07:00
Junio C Hamano
2408f3b74b Merge branch 'nd/grep-exclude-standard-help-fix' into maint
Description given by "grep -h" for its --exclude-standard option
was phrased poorly.

* nd/grep-exclude-standard-help-fix:
  grep: correct help string for --exclude-standard
2015-03-13 22:56:06 -07:00
Junio C Hamano
5244a31039 Merge branch 'jc/apply-beyond-symlink' into maint
"git apply" was not very careful about reading from, removing,
updating and creating paths outside the working tree (under
--index/--cached) or the current directory (when used as a
replacement for GNU patch).

* jc/apply-beyond-symlink:
  apply: do not touch a file beyond a symbolic link
  apply: do not read from beyond a symbolic link
  apply: do not read from the filesystem under --index
  apply: reject input that touches outside the working area
2015-03-13 22:56:02 -07:00
Jeff King
dd059c6c07 tag: fix some mis-organized options in "-h" listing
Running "git tag -h" currently prints:

  [...]
  Tag creation options
      [...]
      --column[=<style>]    show tag list in columns
      --sort <type>         sort tags

  Tag listing options
      --contains <commit>   print only tags that contain the commit
      --points-at <object>  print only tags of the object

The "--column" and "--sort" options should go under the "Tag listing" group.

Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2015-03-12 11:54:55 -07:00
Stefan Beller
fd2014d42b builtin/help.c: fix memory leak
Signed-off-by: Stefan Beller <sbeller@google.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2015-03-10 20:56:51 -07:00
Kyle J. McKay
b680a86a86 help.c: use SHELL_PATH instead of hard-coded "/bin/sh"
If the user has set SHELL_PATH in the Makefile then we
should respect that value and use it.

Signed-off-by: Kyle J. McKay <mackyle@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2015-03-10 15:11:29 -07:00
Junio C Hamano
82b7e65199 Merge branch 'mh/expire-updateref-fixes'
Various issues around "reflog expire", e.g. using --updateref when
expiring a reflog for a symbolic reference, have been corrected
and/or made saner.

* mh/expire-updateref-fixes:
  reflog_expire(): never update a reference to null_sha1
  reflog_expire(): ignore --updateref for symbolic references
  reflog: improve and update documentation
  struct ref_lock: delete the force_write member
  lock_ref_sha1_basic(): do not set force_write for missing references
  write_ref_sha1(): move write elision test to callers
  write_ref_sha1(): remove check for lock == NULL
2015-03-10 13:52:40 -07:00