rev-parse test: use standard test functions for setup

Save the reader from learning specialized t6* setup functions
where familiar commands like test_commit, "git checkout --orphan",
and "git merge" will do.

While at it, wrap the setup commands in a test assertion so errors can
be caught and stray output suppressed when running without --verbose
as in other tests.

Signed-off-by: Felipe Contreras <felipe.contreras@gmail.com>
Signed-off-by: Jonathan Nieder <jrnieder@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
peel_onion(): add support for <rev>^{tag}

Complete the <rev>^{<type>} family of object descriptors by having
<rev>^{tag} dereference <rev> until a tag object is found (or fail if
unable).

At first glance this may not seem very useful, as commits, trees, and
blobs cannot be peeled to a tag, and a tag would just peel to itself.
However, this can be used to ensure that <rev> names a tag object:

    $ git rev-parse --verify v1.8.4^{tag}
    04f013dc38d7512eadb915eba22efc414f18b869
    $ git rev-parse --verify master^{tag}
    error: master^{tag}: expected tag type, but the object dereferences to tree type
    fatal: Needed a single revision

Users can already ensure that <rev> is a tag object by checking the
output of 'git cat-file -t <rev>', but:
  * users may expect <rev>^{tag} to exist given that <rev>^{commit},
    <rev>^{tree}, and <rev>^{blob} all exist
  * this syntax is more convenient/natural in some circumstances

Signed-off-by: Richard Hansen <rhansen@bbn.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
peel_onion: do not assume length of x_type globals

When we are parsing "rev^{foo}", we check "foo" against the
various global type strings, like "commit_type",
"tree_type", etc. This is nicely abstracted, but then we
destroy the abstraction completely by using magic numbers
that must match the length of the type strings.

We could avoid these magic numbers by using skip_prefix. But
taking a step back, we can realize that using the
"commit_type" global is not really buying us anything. It is
not ever going to change from being "commit" without causing
severe breakage to existing uses. And even if it did change
for some crazy reason, we would want to evaluate its effects
on the "rev^{}" syntax, anyway.

Let's just switch these to using a custom string literal, as
we do for "rev^{object}". The resulting code is more robust
to changes in the type strings, and is more readable.

Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Merge branch 'maint-1.8.2' into maint-1.8.3

* maint-1.8.2:
  fix shell syntax error in template
Merge branch 'maint-1.8.3' into maint

* maint-1.8.3:
  fix shell syntax error in template
Merge git://github.com/git-l10n/git-po into maint

* git://github.com/git-l10n/git-po:
  l10n: fr.po: hotfix for commit 6b388fc
Merge branch 'maint'

* maint:
  fix shell syntax error in template
  l10n: fr.po: hotfix for commit 6b388fc
git p4: implement view spec wildcards with "p4 where"

"git p4" does not support many of the view wildcards, such as * and
%%n.  It only knows the common ... mapping, and exclusions.

Redo the entire wildcard code around the idea of directly querying
the p4 server for the mapping.  For each commit, invoke "p4 where"
with committed file paths as args and use the client mapping to
decide where the file goes in git.

This simplifies a lot of code, and adds support for all wildcards
supported by p4.  Downside is that there is probably a 20%-ish
slowdown with this approach.

[pw: redo code and tests]

Signed-off-by: Kazuki Saitoh <ksaitoh560@gmail.com>
Signed-off-by: Pete Wyckoff <pw@padd.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
add--interactive: fix external command invocation on Windows

Back in 21e9757e (Hack git-add--interactive to make it work with
ActiveState Perl, 2007-08-01), the invocation of external commands was
changed to use qx{} on Windows. The rationale was that the command
interpreter on Windows is not a POSIX shell, but rather Windows's CMD.
That patch was wrong to include 'msys' in the check whether to use qx{}
or not: 'msys' identifies MSYS perl as shipped with Git for Windows,
which does not need the special treatment; qx{} should be used only with
ActiveState perl, which is identified by 'MSWin32'.

Signed-off-by: Johannes Sixt <j6t@kdbg.org>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
t5308: check that index-pack --strict detects duplicate objects

Commit 68be2fea (receive-pack, fetch-pack: reject bogus pack that
records objects twice, 2011-11-16) taught index-pack to notice and
reject duplicate objects if --strict is given (which it is for
incoming packs, if transfer.fsckObjects is set).  However, it never
tested the code, because we did not have an easy way of generating
such a bogus pack.

Now that we have test infrastructure to handle this, let's confirm
that it works.

Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
refs: factor update_ref steps into helpers

Factor the lock and write steps and error handling into helper functions
update_ref_lock and update_ref_write to allow later use elsewhere.
Expose lock_any_ref_for_update's type_p to update_ref_lock callers.

While at it, drop "static" from the local "lock" variable as it is not
necessary to keep across invocations.

Signed-off-by: Brad King <brad.king@kitware.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
refs: factor delete_ref loose ref step into a helper

Factor loose ref deletion into helper function delete_ref_loose to allow
later use elsewhere.

Signed-off-by: Brad King <brad.king@kitware.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
refs: add function to repack without multiple refs

Generalize repack_without_ref as repack_without_refs to support a list
of refs and implement the former in terms of the latter.

Signed-off-by: Brad King <brad.king@kitware.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
refs: add update_refs for multiple simultaneous updates

Add 'struct ref_update' to encode the information needed to update or
delete a ref (name, new sha1, optional old sha1, no-deref flag).  Add
function 'update_refs' accepting an array of updates to perform.  First
sort the input array to order locks consistently everywhere and reject
multiple updates to the same ref.  Then acquire locks on all refs with
verified old values.  Then update or delete all refs accordingly.  Fail
if any one lock cannot be obtained or any one old value does not match.

Though the refs themselves cannot be modified together in a single
atomic transaction, this function does enable some useful semantics.
For example, a caller may create a new branch starting from the head of
another branch and rewind the original branch at the same time.  This
transfers ownership of commits between branches without risk of losing
commits added to the original branch by a concurrent process, or risk of
a concurrent process creating the new branch first.

Signed-off-by: Brad King <brad.king@kitware.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Merge branch 'jc/check-x-z'

"git check-ignore -z" applied the NUL termination to both its input
(with --stdin) and its output, but "git check-attr -z" ignored the
option on the output side.

This is potentially a backward incompatible fix.  Let's see if
anybody screams before deciding if we want to do anything to help
existing users (there may be none).

* jc/check-x-z:
  check-attr -z: a single -z should apply to both input and output
  check-ignore -z: a single -z should apply to both input and output
  check-attr: the name of the character is NUL, not NULL
  check-ignore: the name of the character is NUL, not NULL
Merge branch 'km/svn-1.8-serf-only'

Subversion 1.8.0 that was recently released breaks older subversion
clients coming over http/https in various ways.

* km/svn-1.8-serf-only:
  Git.pm: revert _temp_cache use of temp_is_locked
  git-svn: allow git-svn fetching to work using serf
  Git.pm: add new temp_is_locked function
Merge branch 'jk/fast-import-empty-ls'

* jk/fast-import-empty-ls:
  fast-import: allow moving the root tree
  fast-import: allow ls or filecopy of the root tree
  fast-import: set valid mode on root tree in "ls"
  t9300: document fast-import empty path issues
Merge branch 'rr/feed-real-path-to-editor'

* rr/feed-real-path-to-editor:
  editor: use canonicalized absolute path
Merge branch 'nd/sq-quote-buf'

Code simplification as a preparatory step to something larger.

* nd/sq-quote-buf:
  quote: remove sq_quote_print()
  tar-tree: remove dependency on sq_quote_print()
  for-each-ref, quote: convert *_quote_print -> *_quote_buf
Merge branch 'da/darwin'

* da/darwin:
  OS X: Fix redeclaration of die warning
  Makefile: Fix APPLE_COMMON_CRYPTO with BLK_SHA1
  imap-send: use Apple's Security framework for base64 encoding