If config parameter core.logAllRefUpdates is true or the log
file already exists then append a line to ".git/logs/refs/<ref>"
whenever git-update-ref <ref> is executed.  Each log line contains
the following information:

  oldsha1 <SP> newsha1 <SP> committer <LF>

where committer is the current user, date, time and timezone in
the standard GIT ident format.  If the caller is unable to append
to the log file then git-update-ref will fail without updating <ref>.

An optional message may be included in the log line with the -m flag.
Signed-off-by: NShawn O. Pearce <spearce@spearce.org>
Signed-off-by: NJunio C Hamano <junkio@cox.net>

This conversion also adds the '-m' switch to update-ref allowing
the caller to record why the ref is changing.  At present this is
merely copied down into the ref_lock API.
Signed-off-by: NShawn O. Pearce <spearce@spearce.org>
Signed-off-by: NJunio C Hamano <junkio@cox.net>

Created 'struct ref_lock' to contain the data necessary to perform
a ref update.  This change improves writing a ref as the file names
are generated only once (rather than twice) and supports following
symrefs (up to the maximum depth).  Further the ref_lock structure
provides room to extend the update API with ref logging.
Signed-off-by: NShawn O. Pearce <spearce@spearce.org>
Signed-off-by: NJunio C Hamano <junkio@cox.net>

Signed-off-by: NShawn O. Pearce <spearce@spearce.org>
Signed-off-by: NJunio C Hamano <junkio@cox.net>

Signed-off-by: NEric Wong <normalperson@yhbt.net>
Signed-off-by: NJunio C Hamano <junkio@cox.net>

It's built-in now.
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>
Signed-off-by: NJunio C Hamano <junkio@cox.net>

* maint:
  merge-base: Clarify the comments on post processing.
  Update the documentation for git-merge-base

* np/pack:
  improve depth heuristic for maximum delta size
  pack-object: slightly more efficient
  simple euristic for further free packing improvements

The comment fooled myself believing that we still had an
unsolved horizon effect.
Signed-off-by: NJunio C Hamano <junkio@cox.net>

This provides a linear decrement on the penalty related to delta depth
instead of being an 1/x function.  With this another 5% reduction is
observed on packs for both the GIT repo and the Linux kernel repo, as
well as fixing a pack size regression in another sample repo I have.
Signed-off-by: NNicolas Pitre <nico@cam.org>
Signed-off-by: NJunio C Hamano <junkio@cox.net>

* se/tag:
  Strip useless "tags/" prefix from git-tag -l output

* se/rev-parse:
  Add "--branches", "--tags" and "--remotes" options to git-rev-parse.

* se/diff:
  Convert some "apply --summary" users to "diff --summary".
  Add "--summary" option to git diff.

* se/rebase:
  Make git rebase interactive help match documentation.

Signed-off-by: NFredrik Kuivinen <freku045@student.liu.se>
Signed-off-by: NJunio C Hamano <junkio@cox.net>

The code forgot that setup_revisions() leaves parsed object
names in reverse in the list.
Signed-off-by: NJunio C Hamano <junkio@cox.net>

* lt/oneway:
  read-tree --reset -u fix.
  read-tree -u one-way merge fix to check out locally modified paths.
  Simplify "git reset --hard"
  Allow one-way tree merge to remove old files

* ew/send-email:
  send-email: quiet some warnings, reject invalid addresses
  send-email: allow sendmail binary to be used instead of SMTP

* lt/config:

* jc/grep: (22 commits)
  Fix silly typo in new builtin grep
  builtin-grep: unparse more command line options.
  builtin-grep: use external grep when we can take advantage of it
  builtin-grep: -F (--fixed-strings)
  builtin-grep: -w fix
  builtin-grep: typofix
  builtin-grep: tighten argument parsing.
  builtin-grep: documentation
  Teach -f <file> option to builtin-grep.
  builtin-grep: -L (--files-without-match).
  builtin-grep: binary files -a and -I
  builtin-grep: terminate correctly at EOF
  builtin-grep: tighten path wildcard vs tree traversal.
  builtin-grep: support -w (--word-regexp).
  builtin-grep: support -c (--count).
  builtin-grep: allow more than one patterns.
  builtin-grep: allow -<n> and -[ABC]<n> notation for context lines.
  builtin-grep: printf %.*s length is int, not ptrdiff_t.
  builtin-grep: do not use setup_revisions()
  builtin-grep: support '-l' option.
  ...

* lt/diff:
  git diff: support "-U" and "--unified" options properly

The "-F" flag apparently got mis-translated due to some over-eager
copy-paste work into a duplicate "-H" when using the external grep.
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>
Signed-off-by: NJunio C Hamano <junkio@cox.net>

* fix:
  Fix pack-index issue on 64-bit platforms a bit more portably.
  Install git-send-email by default
  Fix compilation on newer NetBSD systems
  git config syntax updates
  Another config file parsing fix.
  checkout: use --aggressive when running a 3-way merge (-m).

The earlier one to use external grep missed some often used options.
Signed-off-by: NJunio C Hamano <junkio@cox.net>

Apparently <stdint.h> is not enough for uint32_t on OpenBSD; use
"unsigned int" -- hopefully that would stay 32-bit on every
platform we care about, at least until we update the pack-index
file format.

Our sha1 routines optimized for architectures use uint32_t and
expects '#include <stdint.h>' to be enough, so OpenBSD on arm or
ppc might have similar issues down the road, I dunno.
Signed-off-by: NJunio C Hamano <junkio@cox.net>

After 567ffeb7 and
4bc87a28, git-send-email no
longer requires any non-standard Perl modules, so there's no
reason to special-case it.
Signed-off-by: NEric Wong <normalperson@yhbt.net>
Signed-off-by: NJunio C Hamano <junkio@cox.net>

NetBSD >=2.0 has iconv() in libc.  A libiconv is not required and
does not exist.

See: http://netbsd.gw.com/cgi-bin/man-cgi?iconv+3+NetBSD-2.0

[jc: with a bit of simplification later discussed on the list.]
Signed-off-by: NDennis Stosberg <dennis@stosberg.net>
Signed-off-by: NJunio C Hamano <junkio@cox.net>

Avoid creating a delta index for objects with maximum depth since they
are not going to be used as delta base anyway.  This also reduce peak
memory usage slightly as the current object's delta index is not useful
until the next object in the loop is considered for deltification. This
saves a bit more than 1% on CPU usage.
Signed-off-by: NNicolas Pitre <nico@cam.org>
Signed-off-by: NJunio C Hamano <junkio@cox.net>

Given that the early eviction of objects with maximum delta depth
may exhibit bad packing on its own, why not considering a bias against
deep base objects in try_delta() to mitigate that bad behavior.

This patch adjust the MAX_size allowed for a delta based on the depth of
the base object as well as enabling the early eviction of max depth
objects from the object window.  When used separately, those two things
produce slightly better and much worse results respectively.  But their
combined effect is a surprising significant packing improvement.

With this really simple patch the GIT repo gets nearly 15% smaller, and
the Linux kernel repo about 5% smaller, with no significantly measurable
CPU usage difference.
Signed-off-by: NNicolas Pitre <nico@cam.org>
Signed-off-by: NJunio C Hamano <junkio@cox.net>

The previous commit makes -u to mean "I do want to remove the
local changes, just update it from the read tree" only for
one-way merge.  It makes sense to have it depend on the
"--reset" flag instead.
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>
Signed-off-by: NJunio C Hamano <junkio@cox.net>

I'm not sure why we never actually rejected invalid addresses in
the first place.  We just seemed to be using our email validity
checkers to kill duplicates.

Now we just drop invalid email addresses completely and warn
the user about it.

Since we support local sendmail, we'll also accept username-only
addresses.
Signed-off-by: NEric Wong <normalperson@yhbt.net>
Signed-off-by: NJunio C Hamano <junkio@cox.net>

This should make local mailing possible for machines without
a connection to an SMTP server.

It'll default to using /usr/sbin/sendmail or /usr/lib/sendmail
if no SMTP server is specified (the default).  If it can't find
either of those paths, it'll fall back to connecting to an SMTP
server on localhost.
Signed-off-by: NEric Wong <normalperson@yhbt.net>
Signed-off-by: NJunio C Hamano <junkio@cox.net>

* fix:
  Ensure author & committer before asking for commit message.

* fix:
  Ensure author & committer before asking for commit message.

The "-u" flag means "update the working tree files", but to
other types of merges, it also implies "I want to keep my local
changes" -- because they prevent local changes from getting lost
by using verify_uptodate.  The one-way merge is different from
other merges in that its purpose is opposite of doing something
else while keeping unrelated local changes.  The point of
one-way merge is to nuke local changes.  So while it feels
somewhat wrong that this actively loses local changes, it is the
right thing to do.
Signed-off-by: NJunio C Hamano <junkio@cox.net>

After 567ffeb7 and
4bc87a28, git-send-email no
longer requires any non-standard Perl modules, so there's no
reason to special-case it.
Signed-off-by: NEric Wong <normalperson@yhbt.net>
Signed-off-by: NJunio C Hamano <junkio@cox.net>

mutt, gnus, pine, mailrc formats should be supported.

Testing and feedback for correctness and completeness of all formats
and support for additional formats would be good.

Nested expansions are also supported.

More than one alias file to be used.

All alias file formats must still of be the same type, though.

Two git repo-config keys are required for this
(as suggested by Ryan Anderson):

    sendemail.aliasesfile = <filename of aliases file>
    sendemail.aliasfiletype = (mutt|gnus|pine|mailrc)
Signed-off-by: NEric Wong <normalperson@yhbt.net>
Acked-by: NRyan Anderson <ryan@michonline.com>
Signed-off-by: NJunio C Hamano <junkio@cox.net>

It's not perfect, but it gets the "git grep some-random-string" down to
the good old half-a-second range for the kernel.

It should convert more of the argument flags for "grep", that should be
trivial to expand (I did a few just as an example). It should also bother
to try to return the right "hit" value (which it doesn't, right now - the
code is kind of there, but I didn't actually bother to do it _right_).

Also, right now it _just_ limits by number of arguments, but it should
also strictly speaking limit by total argument size (ie add up the length
of the filenames, and do the "exec_grep()" flush call if it's bigger than
some random value like 32kB).

But I think that it's _conceptually_ doing all the right things, and it
seems to work. So maybe somebody else can do some of the final polish.
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>
Signed-off-by: NJunio C Hamano <junkio@cox.net>

When renaming leading/a/filename to leading/b/filename (and
"filename" is sufficiently long), we tried to squash the rename
to "leading/{a => b}/filename".  However, when "/a" or "/b" part
is empty, we underflowed and tried to print a substring of
length -1.
Signed-off-by: NJunio C Hamano <junkio@cox.net>