When simplifying an odd merge, such as one that used "-s ours", we may
find ourselves TREESAME to apparently redundant parents. Prevent
simplify_merges() from removing every TREESAME parent; if this would
happen reinstate the first TREESAME parent - the one that the default
log would have followed.

This avoids producing a totally disjoint history from the default log
when the default log is a better explanation of the end result, and aids
visualisation of odd merges.
Signed-off-by: NKevin Bracey <kevin@bracey.fi>
Signed-off-by: NJunio C Hamano <gitster@pobox.com>

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

History simplification previously always treated merges as TREESAME
if they were TREESAME to any parent.

While this was consistent with the default behaviour, this could be
extremely unhelpful when searching detailed history, and could not be
overridden. For example, if a merge had ignored a change, as if by "-s
ours", then:

  git log -m -p --full-history -Schange file

would successfully locate "change"'s addition but would not locate the
merge that resolved against it.

Futher, simplify_merges could drop the actual parent that a commit
was TREESAME to, leaving it as a normal commit marked TREESAME that
isn't actually TREESAME to its remaining parent.

Now redefine a commit's TREESAME flag to be true only if a commit is
TREESAME to _all_ of its parents. This doesn't affect either the default
simplify_history behaviour (because partially TREESAME merges are turned
into normal commits), or full-history with parent rewriting (because all
merges are output). But it does affect other modes. The clearest
difference is that --full-history will show more merges - sufficient to
ensure that -m -p --full-history log searches can really explain every
change to the file, including those changes' ultimate fate in merges.

Also modify simplify_merges to recalculate TREESAME after removing
a parent. This is achieved by storing per-parent TREESAME flags on the
initial scan, so the combined flag can be easily recomputed.

This fixes some t6111 failures, but creates a couple of new ones -
we are now showing some merges that don't need to be shown.
Signed-off-by: NKevin Bracey <kevin@bracey.fi>
Signed-off-by: NJunio C Hamano <gitster@pobox.com>

The documentation of --boundary uses the term "uninteresting", which is
not used or defined anywhere else in the documentation. This is
unhelpful and confusing to anyone who hasn't seen the UNINTERESTING
flag in the source code.

Change to use "excluded", as per revisions.txt.
Signed-off-by: NKevin Bracey <kevin@bracey.fi>
Signed-off-by: NJunio C Hamano <gitster@pobox.com>

In the example given, P is not TREESAME to E. This doesn't affect the
current result, but it will matter when we change behaviour.
Signed-off-by: NKevin Bracey <kevin@bracey.fi>
Signed-off-by: NJunio C Hamano <gitster@pobox.com>

Signed-off-by: NKevin Bracey <kevin@bracey.fi>
Signed-off-by: NJunio C Hamano <gitster@pobox.com>

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

Some side branching and odd merging to illustrate various flaws in
revision list scans, particularly when limiting the list.

Many expected failures, which will be gone by the end of the "history
traversal refinements" series.
Signed-off-by: NKevin Bracey <kevin@bracey.fi>
Signed-off-by: NJunio C Hamano <gitster@pobox.com>

In preparation for upcoming TREESAME work, check the result for G.t,
which is dropped in "-s ours" merge L. The default rev-list is empty, as
expected - it follows the first parent path where it never existed.

Unfortunately, --ancestry-path is also empty. Merges H J and L are all
TREESAME to 1 parent, so are treated as TREESAME and not shown. This is
clearly undesirable in the case of merge L, which dropped our G.t by
taking the non-ancestry-path version. Document this as a known failure,
and expect "H J L", the 3 merges along the path that had to chose G.t
versions.
Signed-off-by: NKevin Bracey <kevin@bracey.fi>
Signed-off-by: NJunio C Hamano <gitster@pobox.com>

When growing the table, take the opportunity to "compact" it by removing
entries with NULL decoration.

Users may have "removed" decorations by passing NULL to
insert_decoration. An object's table entry can't actually be removed
during normal operation, as it would break the linear hash collision
search. But we can remove NULL decoration entries when rebuilding the
table.
Signed-off-by: NKevin Bracey <kevin@bracey.fi>
Signed-off-by: NJunio C Hamano <gitster@pobox.com>

The documentation assures users that "A...B" is defined as "A B --not
$(git merge-base --all A B)". This wasn't in fact quite true, because
the calculated merge bases were not sent to add_rev_cmdline().

The main effect of this was that although

  git rev-list --ancestry-path A B --not $(git merge-base --all A B)

worked, the simpler form

  git rev-list --ancestry-path A...B

failed with a "no bottom commits" error.

Other potential users of bottom commits could also be affected by this
problem, if they examine revs->cmdline_info; I came across the issue in
my proposed history traversal refinements series.

So ensure that the calculated merge bases are sent to add_rev_cmdline(),
flagged with new 'whence' enum value REV_CMD_MERGE_BASE.
Signed-off-by: NKevin Bracey <kevin@bracey.fi>
Signed-off-by: NJunio C Hamano <gitster@pobox.com>

Signed-off-by: NKevin Bracey <kevin@bracey.fi>
Signed-off-by: NJunio C Hamano <gitster@pobox.com>

Using sed -e '/[0-9]\+//' to find "one or more digits" is not
portable.

Use the Basic Regular Expression '/[0-9][0-9]*//' instead.
Signed-off-by: NTorsten Bögershausen <tboegi@web.de>
Signed-off-by: NJunio C Hamano <gitster@pobox.com>

* git://git.bogomips.org/git-svn:
  git-svn: added an --include-path flag
  Git::SVN::*: add missing "NAME" section to perldoc
  git-svn: avoid self-referencing mergeinfo

* maint:
  Git 1.8.2.3
  t5004: avoid using tar for checking emptiness of archive
  t5004: ignore pax global header file
  mergetools/kdiff3: do not use --auto when diffing
  transport-helper: trivial style cleanup

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

Fix "git cherry-pick $annotated_tag", which was mistakenly rejected.

* mv/sequencer-pick-error-diag:
  cherry-pick: picking a tag that resolves to a commit is OK

Earlier, 21246dbb (cherry-pick: make sure all input objects are
commits, 2013-04-11) tried to catch an unlikely "git cherry-pick $blob"
as an error, but broke a more important use case to cherry-pick a
tag that points at a commit.
Signed-off-by: NJunio C Hamano <gitster@pobox.com>

* tr/copy-revisions-from-stdin:
  read_revisions_from_stdin: make copies for handle_revision_arg

Test 2 of t5004 checks if a supposedly empty tar archive really
contains no files.  24676f02 (t5004: fix issue with empty archive test
and bsdtar) removed our commit hash to make it work with bsdtar, but
the test still fails on NetBSD and OpenBSD, which use their own tar
that considers a tar file containing only NULs as broken.

Here's what the different archivers do when asked to create a tar
file without entries:

	$ uname -v
	NetBSD 6.0.1 (GENERIC)
	$ gtar --version | head -1
	tar (GNU tar) 1.26
	$ bsdtar --version
	bsdtar 2.8.4 - libarchive 2.8.4

	$ : >zero.tar
	$ perl -e 'print "\0" x 10240' >tenk.tar
	$ sha1 zero.tar tenk.tar
	SHA1 (zero.tar) = da39a3ee5e6b4b0d3255bfef95601890afd80709
	SHA1 (tenk.tar) = 34e163be8e43c5631d8b92e9c43ab0bf0fa62b9c

	$ : | tar cf - -T - | sha1
	da39a3ee5e6b4b0d3255bfef95601890afd80709
	$ : | gtar cf - -T - | sha1
	34e163be8e43c5631d8b92e9c43ab0bf0fa62b9c
	$ : | bsdtar cf - -T - | sha1
	34e163be8e43c5631d8b92e9c43ab0bf0fa62b9c

So NetBSD's native tar creates an empty file, while GNU tar and bsdtar
both give us 10KB of NULs -- just like git archive with an empty tree.
Now let's see how the archivers handle these two kinds of empty tar
files:

	$ tar tf zero.tar; echo $?
	tar: Unexpected EOF on archive file
	1
	$ gtar tf zero.tar; echo $?
	gtar: This does not look like a tar archive
	gtar: Exiting with failure status due to previous errors
	2
	$ bsdtar tf zero.tar; echo $?
	0

	$ tar tf tenk.tar; echo $?
	tar: Cannot identify format. Searching...
	tar: End of archive volume 1 reached
	tar: Sorry, unable to determine archive format.
	1
	$ gtar tf tenk.tar; echo $?
	0
	$ bsdtar tf tenk.tar; echo $?
	0

NetBSD's tar complains about both, bsdtar happily accepts any of them
and GNU tar doesn't like zero-length archive files.  So the safest
course of action is to stay with our block-of-NULs format which is
compatible with GNU tar and bsdtar, as we can't make NetBSD's native
tar happy anyway.

We can simplify our test, however, by taking tar out of the picture.
Instead of extracting the archive and checking for the non-presence of
files, check if the file has a size of 10KB and contains only NULs.
This makes t5004 pass on NetBSD and OpenBSD.
Signed-off-by: NRene Scharfe <rene.scharfe@lsrfire.ath.cx>
Signed-off-by: NJunio C Hamano <gitster@pobox.com>

Versions of tar that don't know pax headers -- like the ones in NetBSD 6
and OpenBSD 5.2 -- extract them as regular files.  Explicitly ignore the
file created for our global header when checking the list of extracted
files, as this is normal and harmless fall-back behaviour.  This fixes
test 3 of t5004 on these platforms.
Signed-off-by: NRene Scharfe <rene.scharfe@lsrfire.ath.cx>
Signed-off-by: NJunio C Hamano <gitster@pobox.com>

The `kdiff3 --auto` help message is, "No GUI if all conflicts are auto-
solvable."  This flag was carried over from the original mergetool
commands.  diff_cmd() is for two-way comparisons only so remove the
superfluous flag.
Signed-off-by: NDavid Aguilar <davvid@gmail.com>
Signed-off-by: NJunio C Hamano <gitster@pobox.com>

Signed-off-by: NFelipe Contreras <felipe.contreras@gmail.com>
Signed-off-by: NJunio C Hamano <gitster@pobox.com>

The SVN::Fetcher module is now able to filter for inclusion as well
as exclusion (as used by --ignore-path). Also added tests, documentation
changes and git completion script.

If you have an SVN repository with many top level directories and you
only want a git-svn clone of some of them then using --ignore-path is
difficult as it requires a very long regexp. In this case it's much
easier to filter for inclusion.

[ew: remove trailing whitespace]
Signed-off-by: NPaul Walmsley <pjwhams@gmail.com>
Signed-off-by: NEric Wong <normalperson@yhbt.net>

lexgrog(1) relies on the NAME section to find a manpage's subject's
name and description for easy access later using "man -k".  Add the
section it expects.

Noticed using lintian.
Signed-off-by: NJonathan Nieder <jrnieder@gmail.com>
Signed-off-by: NEric Wong <normalperson@yhbt.net>

When svn.pushmergeinfo is set, the target branch is included in the
mergeinfo if it was previously merged into one of the source branches.
SVN does not do this.

Remove merge target branch path from resulting mergeinfo when
svn.pushmergeinfo is set to better match the behavior of SVN. Update the
svn-mergeinfo-push test.

[ew: 80 columns]
Signed-off-by: NMichael Contreras <michael@inetric.com>
Reported-by: NAvishay Lavie <avishay.lavie@gmail.com>
Acked-by: NEric Wong <normalperson@yhbt.net>

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

The comment was copied from hg-fast-export, not used anymore.
Signed-off-by: NFelipe Contreras <felipe.contreras@gmail.com>
Signed-off-by: NJunio C Hamano <gitster@pobox.com>

It's possible that the previous tip goes away, we should not assume it's
always present. Fortunately we are only using it to calculate the
progress to display to the user, so only that needs to be fixed.

Also, add a test that triggers this issue.
Signed-off-by: NFelipe Contreras <felipe.contreras@gmail.com>
Signed-off-by: NJunio C Hamano <gitster@pobox.com>

* git://github.com/git-l10n/git-po:
  l10n: zh_CN.po: translate 44 messages (2080t0f0u)
  l10n: de.po: translate 44 new messages
  l10n: Update Vietnamese translation (2080t0f0u)
  l10n: Update Swedish translation (2080t0f0u)
  l10n: git.pot: v1.8.3 round 2 (44 new, 12 removed)

Translate 44 new messages came from git.pot update in c6bc7d43
(l10n: git.pot: v1.8.3 round 2 (44 new, 12 removed))
Signed-off-by: NJiang Xin <worldhello.net@gmail.com>

Translate 44 new messages came from git.pot update in
c6bc7d43 (l10n: git.pot: v1.8.3 round 2 (44 new, 12 removed)).
Signed-off-by: NRalf Thielow <ralf.thielow@gmail.com>
Acked-by: NThomas Rast <trast@inf.ethz.ch>

* jk/merge-tree-added-identically:
  merge-tree: handle directory/empty conflict correctly

git-merge-tree causes a null pointer dereference when a directory
entry exists in only one or two of the three trees being compared with
no corresponding entry in the other tree(s).

When this happens, we want to handle the entry as a directory and not
attempt to mark it as a file merge.  Do this by setting the entries bit
in the directory mask when the entry is missing or when it is a
directory, only performing the file comparison when we know that a file
entry exists.
Reported-by: NAndreas Jacobsen <andreas@andreasjacobsen.com>
Signed-off-by: NJohn Keeping <john@keeping.me.uk>
Tested-by: NAndreas Jacobsen <andreas@andreasjacobsen.com>
Signed-off-by: NJunio C Hamano <gitster@pobox.com>

* fc/remote-bzr:
  remote-bzr: avoid bad refs
  remote-bzr: convert all unicode keys to str
  remote-bzr: access branches only when needed
  remote-bzr: delay peer branch usage
  remote-bzr: iterate revisions properly
  remote-bzr: improve progress reporting
  remote-bzr: add option to specify branches
  remote-bzr: add custom method to find branches
  remote-bzr: improve author sanitazion
  remote-bzr: add support for shared repo
  remote-bzr: fix branch names
  remote-bzr: add support for bzr repos
  remote-bzr: use branch variable when appropriate
  remote-bzr: fix partially pushed merge
  remote-bzr: fixes for branch diverge
  remote-bzr: add support to push merges
  remote-bzr: always try to update the worktree
  remote-bzr: fix order of locking in CustomTree
  remote-bzr: delay blob fetching until the very end
  remote-bzr: cleanup CustomTree

Versions of fast-export before v1.8.2 throws a bad 'reset' commands
because of a behavior in transport-helper that is not even needed.
We should ignore them, otherwise we will treat them as branches and
fail.

This was fixed in v1.8.2, but some people use this script in older
versions of git.

Also, check if the ref was a tag, and skip it for now.
Signed-off-by: NFelipe Contreras <felipe.contreras@gmail.com>
Signed-off-by: NJunio C Hamano <gitster@pobox.com>

Otherwise some versions of bazaar might barf.
Signed-off-by: NFelipe Contreras <felipe.contreras@gmail.com>
Signed-off-by: NJunio C Hamano <gitster@pobox.com>

* fc/push-with-export-reporting-result:
  transport-helper: improve push messages

If there's already a remote-helper tracking ref, we can fetch the
SHA-1 to report proper push messages (as opposed to always reporting
[new branch]).

The remote-helper currently can specify the old SHA-1 to avoid this
problem, but there's no point in forcing all remote-helpers to be aware
of git commit ids; they should be able to be agnostic of them.
Signed-off-by: NFelipe Contreras <felipe.contreras@gmail.com>
Reviewed-by: NJeff King <peff@peff.net>
Signed-off-by: NJunio C Hamano <gitster@pobox.com>

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