When both heads deleted, or our side deleted while the other
side did not touch, we did not have to update the working tree.

However, we forgot to remove existing working tree file when we
did not touch and the other side did.
Signed-off-by: NJunio C Hamano <junkio@cox.net>

* lt/fix-apply:
  git-am: --whitespace=x option.
  git-apply: war on whitespace -- finishing touches.
  git-apply --whitespace=nowarn
  apply --whitespace: configuration option.
  apply: squelch excessive errors and --whitespace=error-all
  apply --whitespace fixes and enhancements.
  The war on trailing whitespace

Moving a directory ending in a slash was not working as the
destination was not calculated correctly.
E.g. in the git repo,

 git-mv t/ Documentation

gave the error

 Error: destination 'Documentation' already exists

To get rid of this problem, strip trailing slashes from all arguments.
The comment in cg-mv made me curious about this issue; Pasky, thanks!
As result, the workaround in cg-mv is not needed any more.

Also, another bug was shown by cg-mv. When moving files outside of
a subdirectory, it typically calls git-mv with something like

 git-mv Documentation/git.txt Documentation/../git-mv.txt

which triggers the following error from git-update-index:

 Ignoring path Documentation/../git-mv.txt

The result is a moved file, removed from git revisioning, but not
added again. To fix this, the paths have to be normalized not have ".."
in the middle. This was already done in git-mv, but only for
a better visual appearance :(
Signed-off-by: NJosef Weidendorfer <Josef.Weidendorfer@gmx.de>
Signed-off-by: NJunio C Hamano <junkio@cox.net>

This fixes "git-mv -h" to output the usage without the need
to be in a git repository.
Additionally:
- fix confusing error message when only one arg was given
- fix typo in error message
Signed-off-by: NJosef Weidendorfer <Josef.Weidendorfer@gmx.de>
Signed-off-by: NJunio C Hamano <junkio@cox.net>

Signed-off-by: NJunio C Hamano <junkio@cox.net>
(cherry picked from 9a0e6731 commit)

Combined diffs don't null terminate things in the same way as standard
diffs.  This is presumably wrong.
Signed-off-by: NMark Wooding <mdw@distorted.org.uk>
Signed-off-by: NJunio C Hamano <junkio@cox.net>
(cherry picked from 6baf0484 commit)

For some reason, combined diffs don't honour the --full-index flag when
emitting patches.  Fix this.
Signed-off-by: NMark Wooding <mdw@distorted.org.uk>
Signed-off-by: NJunio C Hamano <junkio@cox.net>
(cherry picked from e70c6b35 commit)

We did not check if we have the same file on both sides when
computing break score.  This is usually not a problem, but if
the user said --find-copies-harde with -B, we ended up trying a
delta between the same data even when we know the SHA1 hash of
both sides match.
Signed-off-by: NJunio C Hamano <junkio@cox.net>
(cherry picked from aeecd23a commit)

This is passed down to git-apply to override the built-in
default and per-repository configuration at runtime.
Signed-off-by: NJunio C Hamano <junkio@cox.net>

This changes the default --whitespace policy to nowarn when we
are only getting --stat, --summary etc. IOW when not applying
the patch.  When applying the patch, the default is warn (spit
out warning message but apply the patch).
Signed-off-by: NJunio C Hamano <junkio@cox.net>

Andrew insists --whitespace=warn should be the default, and I
tend to agree.  This introduces --whitespace=warn, so if your
project policy is more lenient, you can squelch them by having
apply.whitespace=nowarn in your configuration file.
Signed-off-by: NJunio C Hamano <junkio@cox.net>

The new configuration option apply.whitespace can take one of
"warn", "error", "error-all", or "strip".  When git-apply is run
to apply the patch to the index, they are used as the default
value if there is no command line --whitespace option.

Andrew can now tell people who feed him git trees to update to
this version and say:

	git repo-config apply.whitespace error
Signed-off-by: NJunio C Hamano <junkio@cox.net>

This by default makes --whitespace=warn, error, and strip to
warn only the first 5 additions of trailing whitespaces.  A new
option --whitespace=error-all can be used to view all of them
before applying.
Signed-off-by: NJunio C Hamano <junkio@cox.net>

In addition to fixing obvious command line parsing bugs in the
previous round, this changes the following:

 * Adds "--whitespace=strip".  This applies after stripping the
   new trailing whitespaces introduced to the patch.

 * The output error message format is changed to say
   "patch-filename:linenumber:contents of the line".  This makes
   it similar to typical compiler error message format, and
   helps C-x ` (next-error) in Emacs compilation buffer.

 * --whitespace=error and --whitespace=warn do not stop at the
   first error.  We might want to limit the output to say first
   20 such lines to prevent cluttering, but on the other hand if
   you are willing to hand-fix after inspecting them, getting
   everything with a single run might be easier to work with.
   After all, somebody has to do the clean-up work somewhere.
Signed-off-by: NJunio C Hamano <junkio@cox.net>

On Sat, 25 Feb 2006, Andrew Morton wrote:
>
> I'd suggest a) git will simply refuse to apply such a patch unless given a
> special `forcing' flag, b) even when thus forced, it will still warn and c)
> with a different flag, it will strip-then-apply, without generating a
> warning.

This doesn't do the "strip-then-apply" thing, but it allows you to make
git-apply generate a warning or error on extraneous whitespace.

Use --whitespace=warn to warn, and (surprise, surprise) --whitespace=error
to make it a fatal error to have whitespace at the end.

Totally untested, of course. But it compiles, so it must be fine.

HOWEVER! Note that this literally will check every single patch-line with
"+" at the beginning. Which means that if you fix a simple typo, and the
line had a space at the end before, and you didn't remove it, that's still
considered a "new line with whitespace at the end", even though obviously
the line wasn't really new.

I assume this is what you wanted, and there isn't really any sane
alternatives (you could make the warning activate only for _pure_
additions with no deletions at all in that hunk, but that sounds a bit
insane).

		Linus

These two sample hooks try to detect and use the corresponding
commit hook from the same repository.  However, they forgot to
set up GIT_DIR for their own use, so was not in effect.
Signed-off-by: NJunio C Hamano <junkio@cox.net>

* fix:
  git-am: do not allow empty commits by mistake.

* jc/fix-co-candy:
  checkout - eye candy.

* jc/fix-rename-leak:
  diffcore-rename: plug memory leak.

* ar/fix-win:
  fix t5600-clone-fail-cleanup.sh on windows

Running "git-am --resolved" without doing anything can create an empty
commit. Prevent it.

Thanks for Eric W. Biederman for spotting this.
Signed-off-by: NJunio C Hamano <junkio@cox.net>

In windows you cannot remove current or opened directory,
an opened file, a running program, a loaded library, etc...

[jc: signoffs?  With a minor quoting fix.]
Signed-off-by: NJunio C Hamano <junkio@cox.net>

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

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

This implements "eye candy" similar to the pack-object/unpack-object
to entertain users while a large tree is being checked out after
a clone or a pull.
Signed-off-by: NJunio C Hamano <junkio@cox.net>

Unless --no-tags flag was given, git-fetch tried to always
follow remote tags that point at the commits we picked up.

It is not very useful to pick up tags from remote unless storing
the fetched branch head in a local tracking branch.  This is
especially true if the fetch is done to merge the remote branch
into our current branch as one-shot basis (i.e. "please pull"),
and is even harmful if the remote repository has many irrelevant
tags.

This proposed update disables the automated tag following unless
we are storing the a fetched branch head in a local tracking
branch.
Signed-off-by: NJunio C Hamano <junkio@cox.net>

This updates the progress output to match "every one second or
every percent whichever comes early" used by unpack-objects, as
discussed on the list.
Signed-off-by: NJunio C Hamano <junkio@cox.net>

If that pack is big, it takes significant time to write and might
benefit from some more eye candies as well.  This is however disabled
when the pack is written to stdout since in that case the output is
usually piped into unpack_objects which already does its own progress
reporting.
Signed-off-by: NNicolas Pitre <nico@cam.org>
Signed-off-by: NJunio C Hamano <junkio@cox.net>

This provides a stable and simpler progress reporting mechanism that
updates progress as often as possible but accurately not updating more
than once a second.  The deltification phase is also made more
interesting to watch (since repacking a big repository and only seeing a
dot appear once every many seconds is rather boring and doesn't provide
much food for anticipation).
Signed-off-by: NNicolas Pitre <nico@cam.org>
Signed-off-by: NJunio C Hamano <junkio@cox.net>

"empty ident not allowed" error makes commit-tree fail, so we
are already safer in that we would not end up with commit
objects that have bogus names on the author or committer fields.
However, before commit-tree is called there are already changes
made to the index file and the working tree.  The operation can
be resumed after fixing the environment problem, but when this
triggers to a newcomer with unusable gecos, the first question
becomes "what did I lose and how would I recover".

This patch modifies some Porcelainish commands to verify
GIT_COMMITTER_IDENT as soon as we know we are going to make some
commits before doing much damage to prevent confusion.
Signed-off-by: NJunio C Hamano <junkio@cox.net>

Previous one warned people upfront to encourage fixing their
environment early, but some people just use repositories and git
tools read-only without making any changes, and in such a case
there is not much point insisting on them having a usable ident.

This round attempts to move the error until either "git-var"
asks for the ident explicitly or "commit-tree" wants to use it.
Signed-off-by: NJunio C Hamano <junkio@cox.net>

It appears that some people who did not care about having bogus
names in their own commit messages are bitten by the recent
change to require a sane environment [*1*].

While it was a good idea to prevent people from using bogus
names to create commits and doing sign-offs, the error message
is not very informative.  This patch attempts to warn things
upfront and hint people how to fix their environments.

[Footnote]

*1* The thread is this one.

    http://marc.theaimsgroup.com/?t=113868084800004

    Especially this message.

    http://marc.theaimsgroup.com/?m=113932830015032Signed-off-by: NJunio C Hamano <junkio@cox.net>

This tries to rework the solution for the excess delta chain
problem. An earlier commit worked it around ``cheaply'', but
repeated repacking risks unbound growth of delta chains.

This version counts the length of delta chain we are reusing
from the existing pack, and makes sure a base object that has
sufficiently long delta chain does not get deltified.
Signed-off-by: NJunio C Hamano <junkio@cox.net>

A new flag -q makes underlying pack-objects less chatty.
A new flag -f forces delta to be recomputed from scratch.
Signed-off-by: NJunio C Hamano <junkio@cox.net>

This introduces --no-reuse-delta option to disable reusing of
existing delta, which is a large part of the optimization
introduced by this series.  This may become necessary if
repeated repacking makes delta chain too long.  With this, the
output of the command becomes identical to that of the older
implementation.  But the performance suffers greatly.

It still allows reusing non-deltified representations; there is
no point uncompressing and recompressing the whole text.

It also adds a couple more statistics output, while squelching
it under -q flag, which the last round forgot to do.

  $ time old-git-pack-objects --stdout >/dev/null <RL
  Generating pack...
  Done counting 184141 objects.
  Packing 184141 objects....................
  real    12m8.530s       user    11m1.450s       sys     0m57.920s
  $ time git-pack-objects --stdout >/dev/null <RL
  Generating pack...
  Done counting 184141 objects.
  Packing 184141 objects.....................
  Total 184141, written 184141 (delta 138297), reused 178833 (delta 134081)
  real    0m59.549s       user    0m56.670s       sys     0m2.400s
  $ time git-pack-objects --stdout --no-reuse-delta >/dev/null <RL
  Generating pack...
  Done counting 184141 objects.
  Packing 184141 objects.....................
  Total 184141, written 184141 (delta 134833), reused 47904 (delta 0)
  real    11m13.830s      user    9m45.240s       sys     0m44.330s

There is one remaining issue when --no-reuse-delta option is not
used.  It can create delta chains that are deeper than specified.

    A<--B<--C<--D   E   F   G

Suppose we have a delta chain A to D (A is stored in full either
in a pack or as a loose object. B is depth1 delta relative to A,
C is depth2 delta relative to B...) with loose objects E, F, G.
And we are going to pack all of them.

B, C and D are left as delta against A, B and C respectively.
So A, E, F, and G are examined for deltification, and let's say
we decided to keep E expanded, and store the rest as deltas like
this:

    E<--F<--G<--A

Oops.  We ended up making D a bit too deep, didn't we?  B, C and
D form a chain on top of A!

This is because we did not know what the final depth of A would
be, when we checked objects and decided to keep the existing
delta.  Unfortunately, deferring the decision until just before
the deltification is not an option.  To be able to make B, C,
and D candidates for deltification with the rest, we need to
know the type and final unexpanded size of them, but the major
part of the optimization comes from the fact that we do not read
the delta data to do so -- getting the final size is quite an
expensive operation.

To prevent this from happening, we should keep A from being
deltified.  But how would we tell that, cheaply?

To do this most precisely, after check_object() runs, each
object that is used as the base object of some existing delta
needs to be marked with the maximum depth of the objects we
decided to keep deltified (in this case, D is depth 3 relative
to A, so if no other delta chain that is longer than 3 based on
A exists, mark A with 3).  Then when attempting to deltify A, we
would take that number into account to see if the final delta
chain that leads to D becomes too deep.

However, this is a bit cumbersome to compute, so we would cheat
and reduce the maximum depth for A arbitrarily to depth/4 in
this implementation.
Signed-off-by: NJunio C Hamano <junkio@cox.net>

When generating a new pack, notice if we have already needed
objects in existing packs.  If an object is stored deltified,
and its base object is also what we are going to pack, then
reuse the existing deltified representation unconditionally,
bypassing all the expensive find_deltas() and try_deltas()
calls.

Also, notice if what we are going to write out exactly match
what is already in an existing pack (either deltified or just
compressed).  In such a case, we can just copy it instead of
going through the usual uncompressing & recompressing cycle.

Without this patch, in linux-2.6 repository with about 1500
loose objects and a single mega pack:

    $ git-rev-list --objects v2.6.16-rc3 >RL
    $ wc -l RL
    184141 RL
    $ time git-pack-objects p <RL
    Generating pack...
    Done counting 184141 objects.
    Packing 184141 objects....................
    a1fc7b3e537fcb9b3c46b7505df859f0a11e79d2

    real    12m4.323s
    user    11m2.560s
    sys     0m55.950s

With this patch, the same input:

    $ time ../git.junio/git-pack-objects q <RL
    Generating pack...
    Done counting 184141 objects.
    Packing 184141 objects.....................
    a1fc7b3e537fcb9b3c46b7505df859f0a11e79d2
    Total 184141, written 184141, reused 182441

    real    1m2.608s
    user    0m55.090s
    sys     0m1.830s
Signed-off-by: NJunio C Hamano <junkio@cox.net>

The real problem triggered an earlier fix was that an alternate
entry was pointing at a removed directory.  Complaining on
object/pack directory that cannot be opendir-ed produces noise
in an ancient repository that does not have object/pack
directory and has never been packed.

Detect the real user error and report it.  Also if opendir
failed for other reasons (e.g. no read permissions), report that
as well.

Spotted by Andrew Vasquez <andrew.vasquez@qlogic.com>.
Signed-off-by: NJunio C Hamano <junkio@cox.net>

It turns out that the git-push documentation didn't describe what it
would do when not given a refspec, (not on the command line, nor in a
remotes file). This is fairly important for the user who is trying to
understand operations such as:

	git clone git://something/some/where
	# hack, hack, hack
	git push origin

I tracked the mystery behavior down to git-send-pack and lifted the
relevant portion of its documentation up to git-push, (namely that all
refs existing both locally and remotely are updated).
Signed-off-by: NCarl Worth <cworth@cworth.org>
Signed-off-by: NJunio C Hamano <junkio@cox.net>

Perl is not C and does not truncate the division result.  Arghh!
Signed-off-by: NJunio C Hamano <junkio@cox.net>

This adds support to git-add to allow the common -- to separate
command-line options and file names. It adds documentation and a new
git-add test case as well.

[jc: this should apply to 1.2.X maintenance series, so I reworked
 git-ls-files --error-unmatch test. ]
Signed-off-by: NJunio C Hamano <junkio@cox.net>

Fixed a couple of bugs in recovering from broken connections:

The _line() method now returns undef correctly when the connection
is broken instead of falling off the function and returning garbage.

Retries are now reported to stderr and the eventual partially
downloaded file is discarded instead of being appended to.

The "Server gone away" test has been removed, because it was
reachable only if the garbage return bug bit.
Signed-off-by: NMartin Mares <mj@ucw.cz>
Signed-off-by: NJunio C Hamano <junkio@cox.net>

This fixes a bug when importing where a directory gets removed/renamed
but is immediately replaced by a file of the same name in the same
changeset.

This fix only applies to the accurate (default) strategy the moment.

This patch should also fix the fast strategy if/when it is updated
to handle the cases that would've triggered this bug.

This bug was originally found in git-svn, but I remembered I did the
same thing with archimport as well.
Signed-off-by: NEric Wong <normalperson@yhbt.net>
Signed-off-by: NJunio C Hamano <junkio@cox.net>