Commit Graph

436 Commits

Author SHA1 Message Date
Junio C Hamano
d5558581d2 Merge branch 'maint'
* maint:
  commit: discard index after setting up partial commit
  filter-branch: handle filenames that need quoting
  diff: Fix miscounting of --check output
  hg-to-git: fix parent analysis
  mailinfo: feed only one line to handle_filter() for QP input
  diff.c: add "const" qualifier to "char *cmd" member of "struct ll_diff_driver"
  Add "const" qualifier to "char *excludes_file".
  Add "const" qualifier to "char *editor_program".
  Add "const" qualifier to "char *pager_program".
  config: add 'git_config_string' to refactor string config variables.
  diff.c: remove useless check for value != NULL
  fast-import: check return value from unpack_entry()
  Validate nicknames of remote branches to prohibit confusing ones
  diff.c: replace a 'strdup' with 'xstrdup'.
  diff.c: fixup garding of config parser from value=NULL
2008-02-16 00:20:37 -08:00
Christian Couder
dfb068be8d Add "const" qualifier to "char *excludes_file".
Also use "git_config_string" to simplify "config.c" code
where "excludes_file" is set.

Signed-off-by: Christian Couder <chriscool@tuxfamily.org>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2008-02-15 21:24:54 -08:00
Christian Couder
ee9601e6be Add "const" qualifier to "char *editor_program".
Also use "git_config_string" to simplify "config.c" code
where "editor_program" is set.

Signed-off-by: Christian Couder <chriscool@tuxfamily.org>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2008-02-15 21:24:53 -08:00
Christian Couder
872da32d80 Add "const" qualifier to "char *pager_program".
Also use "git_config_string" to simplify "config.c" code
where "pager_program" is set.

Signed-off-by: Christian Couder <chriscool@tuxfamily.org>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2008-02-15 21:24:53 -08:00
Christian Couder
ea5105a5e3 config: add 'git_config_string' to refactor string config variables.
In many places we just check if a value from the config file is not
NULL, then we duplicate it and return 0. This patch introduces the new
'git_config_string' function to do that.

This function is also used to refactor some code in 'config.c'.
Refactoring other files is left for other patches.

Also not all the code in "config.c" is refactored, because the function
takes a "const char **" as its first parameter, but in many places a
"char *" is used instead of a "const char *". (And C does not allow
using a "char **" instead of a "const char **" without a warning.)

Signed-off-by: Christian Couder <chriscool@tuxfamily.org>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2008-02-15 21:24:53 -08:00
Junio C Hamano
e0197c9aae Merge branch 'lt/in-core-index'
* lt/in-core-index:
  lazy index hashing
  Create pathname-based hash-table lookup into index
  read-cache.c: introduce is_racy_timestamp() helper
  read-cache.c: fix a couple more CE_REMOVE conversion
  Also use unpack_trees() in do_diff_cache()
  Make run_diff_index() use unpack_trees(), not read_tree()
  Avoid running lstat(2) on the same cache entry.
  index: be careful when handling long names
  Make on-disk index representation separate from in-core one
2008-02-11 16:46:20 -08:00
Junio C Hamano
40ea4ed903 Add config_error_nonbool() helper function
This is used to report misconfigured configuration file that does not
give any value to a non-boolean variable, e.g.

	[section]
		var

It is perfectly fine to say it if the section.var is a boolean (it means
true), but if a variable expects a string value it should be flagged as
a configuration error.

Signed-off-by: Junio C Hamano <gitster@pobox.com>
2008-02-11 13:11:36 -08:00
Junio C Hamano
9cb76b8cdc lazy index hashing
This delays the hashing of index names until it becomes necessary for
the first time.

Signed-off-by: Junio C Hamano <gitster@pobox.com>
2008-01-22 23:01:13 -08:00
Linus Torvalds
cf558704fb Create pathname-based hash-table lookup into index
This creates a hash index of every single file added to the index.
Right now that hash index isn't actually used for much: I implemented a
"cache_name_exists()" function that uses it to efficiently look up a
filename in the index without having to do the O(logn) binary search,
but quite frankly, that's not why this patch is interesting.

No, the whole and only reason to create the hash of the filenames in the
index is that by modifying the hash function, you can fairly easily do
things like making it always hash equivalent names into the same bucket.

That, in turn, means that suddenly questions like "does this name exist
in the index under an _equivalent_ name?" becomes much much cheaper.

Guiding principles behind this patch:

 - it shouldn't be too costly. In fact, my primary goal here was to
   actually speed up "git commit" with a fully populated kernel tree, by
   being faster at checking whether a file already existed in the index. I
   did succeed, but only barely:

	Best before:
		[torvalds@woody linux]$ time git commit > /dev/null
		real    0m0.255s
		user    0m0.168s
		sys     0m0.088s

	Best after:

		[torvalds@woody linux]$ time ~/git/git commit > /dev/null
		real    0m0.233s
		user    0m0.144s
		sys     0m0.088s

   so some things are actually faster (~8%).

   Caveat: that's really the best case. Other things are invariably going
   to be slightly slower, since we populate that index cache, and quite
   frankly, few things really use it to look things up.

   That said, the cost is really quite small. The worst case is probably
   doing a "git ls-files", which will do very little except puopulate the
   index, and never actually looks anything up in it, just lists it.

	Before:
		[torvalds@woody linux]$ time git ls-files > /dev/null
		real    0m0.016s
		user    0m0.016s
		sys     0m0.000s

	After:
		[torvalds@woody linux]$ time ~/git/git ls-files > /dev/null
		real    0m0.021s
		user    0m0.012s
		sys     0m0.008s

   and while the thing has really gotten relatively much slower, we're
   still talking about something almost unmeasurable (eg 5ms). And that
   really should be pretty much the worst case.

   So we lose 5ms on one "benchmark", but win 22ms on another. Pick your
   poison - this patch has the advantage that it will _likely_ speed up
   the cases that are complex and expensive more than it slows down the
   cases that are already so fast that nobody cares. But if you look at
   relative speedups/slowdowns, it doesn't look so good.

 - It should be simple and clean

   The code may be a bit subtle (the reasons I do hash removal the way I
   do etc), but it re-uses the existing hash.c files, so it really is
   fairly small and straightforward apart from a few odd details.

Now, this patch on its own doesn't really do much, but I think it's worth
looking at, if only because if done correctly, the name hashing really can
make an improvement to the whole issue of "do we have a filename that
looks like this in the index already". And at least it gets real testing
by being used even by default (ie there is a real use-case for it even
without any insane filesystems).

NOTE NOTE NOTE! The current hash is a joke. I'm ashamed of it, I'm just
not ashamed of it enough to really care. I took all the numbers out of my
nether regions - I'm sure it's good enough that it works in practice, but
the whole point was that you can make a really much fancier hash that
hashes characters not directly, but by their upper-case value or something
like that, and thus you get a case-insensitive hash, while still keeping
the name and the index itself totally case sensitive.

Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2008-01-22 21:46:30 -08:00
Junio C Hamano
eadb583134 Avoid running lstat(2) on the same cache entry.
Aside from the lstat(2) done for work tree files, there are
quite many lstat(2) calls in refname dwimming codepath.  This
patch is not about reducing them.

 * It adds a new ce_flag, CE_UPTODATE, that is meant to mark the
   cache entries that record a regular file blob that is up to
   date in the work tree.  If somebody later walks the index and
   wants to see if the work tree has changes, they do not have
   to be checked with lstat(2) again.

 * fill_stat_cache_info() marks the cache entry it just added
   with CE_UPTODATE.  This has the effect of marking the paths
   we write out of the index and lstat(2) immediately as "no
   need to lstat -- we know it is up-to-date", from quite a lot
   fo callers:

    - git-apply --index
    - git-update-index
    - git-checkout-index
    - git-add (uses add_file_to_index())
    - git-commit (ditto)
    - git-mv (ditto)

 * refresh_cache_ent() also marks the cache entry that are clean
   with CE_UPTODATE.

 * write_index is changed not to write CE_UPTODATE out to the
   index file, because CE_UPTODATE is meant to be transient only
   in core.  For the same reason, CE_UPDATE is not written to
   prevent an accident from happening.

Signed-off-by: Junio C Hamano <gitster@pobox.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-01-21 12:44:31 -08:00
Junio C Hamano
7fec10b7f4 index: be careful when handling long names
We currently use lower 12-bit (masked with CE_NAMEMASK) in the
ce_flags field to store the length of the name in cache_entry,
without checking the length parameter given to
create_ce_flags().  This can make us store incorrect length.

Currently we are mostly protected by the fact that many
codepaths first copy the path in a variable of size PATH_MAX,
which typically is 4096 that happens to match the limit, but
that feels like a bug waiting to happen.  Besides, that would
not allow us to shorten the width of CE_NAMEMASK to use the bits
for new flags.

This redefines the meaning of the name length stored in the
cache_entry.  A name that does not fit is represented by storing
CE_NAMEMASK in the field, and the actual length needs to be
computed by actually counting the bytes in the name[] field.
This way, only the unusually long paths need to suffer.

Signed-off-by: Junio C Hamano <gitster@pobox.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-01-21 12:44:31 -08:00
Linus Torvalds
7a51ed66f6 Make on-disk index representation separate from in-core one
This converts the index explicitly on read and write to its on-disk
format, allowing the in-core format to contain more flags, and be
simpler.

In particular, the in-core format is now host-endian (as opposed to the
on-disk one that is network endian in order to be able to be shared
across machines) and as a result we can dispense with all the
htonl/ntohl on accesses to the cache_entry fields.

This will make it easier to make use of various temporary flags that do
not exist in the on-disk format.

Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-01-21 12:44:31 -08:00
Shawn O. Pearce
c9ced051c3 Fix random fast-import errors when compiled with NO_MMAP
fast-import was relying on the fact that on most systems mmap() and
write() are synchronized by the filesystem's buffer cache.  We were
relying on the ability to mmap() 20 bytes beyond the current end
of the file, then later fill in those bytes with a future write()
call, then read them through the previously obtained mmap() address.

This isn't always true with some implementations of NFS, but it is
especially not true with our NO_MMAP=YesPlease build time option used
on some platforms.  If fast-import was built with NO_MMAP=YesPlease
we used the malloc()+pread() emulation and the subsequent write()
call does not update the trailing 20 bytes of a previously obtained
"mmap()" (aka malloc'd) address.

Under NO_MMAP that behavior causes unpack_entry() in sha1_file.c to
be unable to read an object header (or data) that has been unlucky
enough to be written to the packfile at a location such that it
is in the trailing 20 bytes of a window previously opened on that
same packfile.

This bug has gone unnoticed for a very long time as it is highly data
dependent.  Not only does the object have to be placed at the right
position, but it also needs to be positioned behind some other object
that has been accessed due to a branch cache invalidation.  In other
words the stars had to align just right, and if you did run into
this bug you probably should also have purchased a lottery ticket.

Fortunately the workaround is a lot easier than the bug explanation.

Before we allow unpack_entry() to read data from a pack window
that has also (possibly) been modified through write() we force
all existing windows on that packfile to be closed.  By closing
the windows we ensure that any new access via the emulated mmap()
will reread the packfile, updating to the current file content.

This comes at a slight performance degredation as we cannot reuse
previously cached windows when we update the packfile.  But it
is a fairly minor difference as the window closes happen at only
two points:

 - When the packfile is finalized and its .idx is generated:

   At this stage we are getting ready to update the refs and any
   data access into the packfile is going to be random, and is
   going after only the branch tips (to ensure they are valid).
   Our existing windows (if any) are not likely to be positioned
   at useful locations to access those final tip commits so we
   probably were closing them before anyway.

 - When the branch cache missed and we need to reload:

   At this point fast-import is getting change commands for the next
   commit and it needs to go re-read a tree object it previously
   had written out to the packfile.  What windows we had (if any)
   are not likely to cover the tree in question so we probably were
   closing them before anyway.

We do try to avoid unnecessarily closing windows in the second case
by checking to see if the packfile size has increased since the
last time we called unpack_entry() on that packfile.  If the size
has not changed then we have not written additional data, and any
existing window is still vaild.  This nicely handles the cases where
fast-import is going through a branch cache reload and needs to read
many trees at once.  During such an event we are not likely to be
updating the packfile so we do not cycle the windows between reads.

With this change in place t9301-fast-export.sh (which was broken
by c3b0dec509) finally works again.

Signed-off-by: Shawn O. Pearce <spearce@spearce.org>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2008-01-17 22:39:20 -08:00
Brandon Casey
d6cf61bfd4 close_lock_file(): new function in the lockfile API
The lockfile API is a handy way to obtain a file that is cleaned
up if you die().  But sometimes you would need this sequence to
work:

 1. hold_lock_file_for_update() to get a file descriptor for
    writing;

 2. write the contents out, without being able to decide if the
    results should be committed or rolled back;

 3. do something else that makes the decision --- and this
    "something else" needs the lockfile not to have an open file
    descriptor for writing (e.g. Windows do not want a open file
    to be renamed);

 4. call commit_lock_file() or rollback_lock_file() as
    appropriately.

This adds close_lock_file() you can call between step 2 and 3 in
the above sequence.

Signed-off-by: Junio C Hamano <gitster@pobox.com>
2008-01-16 15:35:03 -08:00
Wincent Colaiuta
c1795bb08a Unify whitespace checking
This commit unifies three separate places where whitespace checking was
performed:

 - the whitespace checking previously done in builtin-apply.c is
extracted into a function in ws.c

 - the equivalent logic in "git diff" is removed

 - the emit_line_with_ws() function is also removed because that also
rechecks the whitespace, and its functionality is rolled into ws.c

The new function is called check_and_emit_line() and it does two things:
checks a line for whitespace errors and optionally emits it. The checking
is based on lines of content rather than patch lines (in other words, the
caller must strip the leading "+" or "-"); this was suggested by Junio on
the mailing list to allow for a future extension to "git show" to display
whitespace errors in blobs.

At the same time we teach it to report all classes of whitespace errors
found for a given line rather than reporting only the first found error.

Signed-off-by: Wincent Colaiuta <win@wincent.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2007-12-13 23:43:58 -08:00
Jeff King
6e9af863ee Support GIT_PAGER_IN_USE environment variable
When deciding whether or not to turn on automatic color
support, git_config_colorbool checks whether stdout is a
tty. However, because we run a pager, if stdout is not a
tty, we must check whether it is because we started the
pager. This used to be done by checking the pager_in_use
variable.

This variable was set only when the git program being run
started the pager; there was no way for an external program
running git indicate that it had already started a pager.
This patch allows a program to set GIT_PAGER_IN_USE to a
true value to indicate that even though stdout is not a tty,
it is because a pager is being used.

Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2007-12-11 00:42:05 -08:00
Junio C Hamano
4eb39e9bcc Merge branch 'jc/spht'
* jc/spht:
  Use gitattributes to define per-path whitespace rule
  core.whitespace: documentation updates.
  builtin-apply: teach whitespace_rules
  builtin-apply: rename "whitespace" variables and fix styles
  core.whitespace: add test for diff whitespace error highlighting
  git-diff: complain about >=8 consecutive spaces in initial indent
  War on whitespace: first, a bit of retreat.

Conflicts:

	cache.h
	config.c
	diff.c
2007-12-09 01:23:48 -08:00
Junio C Hamano
774751a8bc Re-fix "builtin-commit: fix --signoff"
An earlier fix to the said commit was incomplete; it mixed up the
meaning of the flag parameter passed to the internal fmt_ident()
function, so this corrects it.

git_author_info() and git_committer_info() can be told to issue a
warning when no usable user information is found, and optionally can be
told to error out.  Operations that actually use the information to
record a new commit or a tag will still error out, but the caller to
leave reflog record will just silently use bogus user information.

Not warning on misconfigured user information while writing a reflog
entry is somewhat debatable, but it is probably nicer to the users to
silently let it pass, because the only information you are losing is who
checked out the branch.

 * git_author_info() and git_committer_info() used to take 1 (positive
   int) to error out with a warning on misconfiguration; this is now
   signalled with a symbolic constant IDENT_ERROR_ON_NO_NAME.

 * These functions used to take -1 (negative int) to warn but continue;
   this is now signalled with a symbolic constant IDENT_WARN_ON_NO_NAME.

 * fmt_ident() function implements the above error reporting behaviour
   common to git_author_info() and git_committer_info().  A symbolic
   constant IDENT_NO_DATE can be or'ed in to the flag parameter to make
   it return only the "Name <email@address.xz>".

 * fmt_name() is a thin wrapper around fmt_ident() that always passes
   IDENT_ERROR_ON_NO_NAME and IDENT_NO_DATE.

Signed-off-by: Junio C Hamano <gitster@pobox.com>
2007-12-09 00:55:55 -08:00
Junio C Hamano
cf1b7869f0 Use gitattributes to define per-path whitespace rule
The `core.whitespace` configuration variable allows you to define what
`diff` and `apply` should consider whitespace errors for all paths in
the project (See gitlink:git-config[1]).  This attribute gives you finer
control per path.

For example, if you have these in the .gitattributes:

    frotz   whitespace
    nitfol  -whitespace
    xyzzy   whitespace=-trailing

all types of whitespace problems known to git are noticed in path 'frotz'
(i.e. diff shows them in diff.whitespace color, and apply warns about
them), no whitespace problem is noticed in path 'nitfol', and the
default types of whitespace problems except "trailing whitespace" are
noticed for path 'xyzzy'.  A project with mixed Python and C might want
to have:

    *.c    whitespace
    *.py   whitespace=-indent-with-non-tab

in its toplevel .gitattributes file.

Signed-off-by: Junio C Hamano <gitster@pobox.com>
2007-12-06 00:45:30 -08:00
Junio C Hamano
31cbb5d961 Merge branch 'kh/commit'
* kh/commit: (33 commits)
  git-commit --allow-empty
  git-commit: Allow to amend a merge commit that does not change the tree
  quote_path: fix collapsing of relative paths
  Make git status usage say git status instead of git commit
  Fix --signoff in builtin-commit differently.
  git-commit: clean up die messages
  Do not generate full commit log message if it is not going to be used
  Remove git-status from list of scripts as it is builtin
  Fix off-by-one error when truncating the diff out of the commit message.
  builtin-commit.c: export GIT_INDEX_FILE for launch_editor as well.
  Add a few more tests for git-commit
  builtin-commit: Include the diff in the commit message when verbose.
  builtin-commit: fix partial-commit support
  Fix add_files_to_cache() to take pathspec, not user specified list of files
  Export three helper functions from ls-files
  builtin-commit: run commit-msg hook with correct message file
  builtin-commit: do not color status output shown in the message template
  file_exists(): dangling symlinks do exist
  Replace "runstatus" with "status" in the tests
  t7501-commit: Add test for git commit <file> with dirty index.
  ...
2007-12-04 17:16:33 -08:00
Junio C Hamano
9bbe6db85f Merge branch 'sp/refspec-match'
* sp/refspec-match:
  refactor fetch's ref matching to use refname_match()
  push: use same rules as git-rev-parse to resolve refspecs
  add refname_match()
  push: support pushing HEAD to real branch name
2007-12-04 17:07:10 -08:00
Christian Couder
b319ce4c14 Trace and quote with argv: get rid of unneeded count argument.
Now that str_buf takes care of all the allocations, there is
no more gain to pass an argument count.

So this patch removes the "count" argument from:
	- "sq_quote_argv"
	- "trace_argv_printf"
and all the callers.

Signed-off-by: Christian Couder <chriscool@tuxfamily.org>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2007-12-03 22:11:53 -08:00
Junio C Hamano
d9ccfe7711 Fix --signoff in builtin-commit differently.
Introduce fmt_name() specifically meant for formatting the name and
email pair, to add signed-off-by value.  This reverts parts of
13208572fb (builtin-commit: fix --signoff)
so that an empty datestamp string given to fmt_ident() by mistake will
error out as before.

Signed-off-by: Junio C Hamano <gitster@pobox.com>
2007-12-02 23:35:46 -08:00
Junio C Hamano
b45563a229 rename: Break filepairs with different types.
When we consider if a path has been totally rewritten, we did not
touch changes from symlinks to files or vice versa.  But a change
that modifies even the type of a blob surely should count as a
complete rewrite.

While we are at it, modernise diffcore-break to be aware of gitlinks (we
do not want to touch them).

Signed-off-by: Junio C Hamano <gitster@pobox.com>
2007-12-02 02:24:46 -08:00
Junio C Hamano
fd200790dc Merge branch 'jk/send-pack'
* jk/send-pack: (24 commits)
  send-pack: cluster ref status reporting
  send-pack: fix "everything up-to-date" message
  send-pack: tighten remote error reporting
  make "find_ref_by_name" a public function
  Fix warning about bitfield in struct ref
  send-pack: assign remote errors to each ref
  send-pack: check ref->status before updating tracking refs
  send-pack: track errors for each ref
  git-push: add documentation for the newly added --mirror mode
  Add tests for git push'es mirror mode
  Update the tracking references only if they were succesfully updated on remote
  Add a test checking if send-pack updated local tracking branches correctly
  git-push: plumb in --mirror mode
  Teach send-pack a mirror mode
  send-pack: segfault fix on forced push
  Reteach builtin-ls-remote to understand remotes
  send-pack: require --verbose to show update of tracking refs
  receive-pack: don't mention successful updates
  more terse push output
  Build in ls-remote
  ...
2007-11-24 16:45:37 -08:00
Junio C Hamano
b6ec1d619f Fix add_files_to_cache() to take pathspec, not user specified list of files
This separates the logic to limit the extent of change to the
index by where you are (controlled by "prefix") and what you
specify from the command line (controlled by "pathspec").

Signed-off-by: Junio C Hamano <gitster@pobox.com>
2007-11-22 17:05:05 -08:00
Junio C Hamano
ee425e4643 Export three helper functions from ls-files
This exports three helper functions from ls-files.

 * pathspec_match() checks if a given path matches a set of pathspecs
   and optionally records which pathspec was used.  This function used
   to be called "match()" but renamed to be a bit less vague.

 * report_path_error() takes a set of pathspecs and the record
   pathspec_match() above leaves, and gives error message.  This
   was split out of the main function of ls-files.

 * overlay_tree_on_cache() takes a tree-ish (typically "HEAD")
   and overlays it on the current in-core index.  By iterating
   over the resulting index, the caller can find out the paths
   in either the index or the HEAD.  This function used to be
   called "overlay_tree()" but renamed to be a bit more
   descriptive.

Signed-off-by: Junio C Hamano <gitster@pobox.com>
2007-11-22 17:05:05 -08:00
Steffen Prohaska
605b4978a1 refactor fetch's ref matching to use refname_match()
The old rules used by fetch were coded as a series of ifs.  The old
rules are:
1) match full refname if it starts with "refs/" or matches "HEAD"
2) verify that full refname starts with "refs/"
3) match abbreviated name in "refs/" if it starts with "heads/",
    "tags/", or "remotes/".
4) match abbreviated name in "refs/heads/"

This is replaced by the new rules
a) match full refname
b) match abbreviated name prefixed with "refs/"
c) match abbreviated name prefixed with "refs/heads/"

The details of the new rules are different from the old rules.  We no
longer verify that the full refname starts with "refs/".  The new rule
(a) matches any full string.  The old rules (1) and (2) were stricter.
Now, the caller is responsible for using sensible full refnames.  This
should be the case for the current code.  The new rule (b) is less
strict than old rule (3).  The new rule accepts abbreviated names that
start with a non-standard prefix below "refs/".

Despite this modifications the new rules should handle all cases as
expected.  Two tests are added to verify that fetch does not resolve
short tags or HEAD in remotes.

We may even think about loosening the rules a bit more and unify them
with the rev-parse rules.  This would be done by replacing
ref_ref_fetch_rules with ref_ref_parse_rules.  Note, the two new test
would break.

Signed-off-by: Steffen Prohaska <prohaska@zib.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2007-11-18 18:39:01 -08:00
Steffen Prohaska
79803322c1 add refname_match()
We use at least two rulesets for matching abbreviated refnames with
full refnames (starting with 'refs/').  git-rev-parse and git-fetch
use slightly different rules.

This commit introduces a new function refname_match
(const char *abbrev_name, const char *full_name, const char **rules).

abbrev_name is expanded using the rules and matched against full_name.
If a match is found the function returns true.  rules is a NULL-terminate
list of format patterns with "%.*s", for example:

    const char *ref_rev_parse_rules[] = {
               "%.*s",
               "refs/%.*s",
               "refs/tags/%.*s",
               "refs/heads/%.*s",
               "refs/remotes/%.*s",
               "refs/remotes/%.*s/HEAD",
               NULL
    };

Asterisks are included in the format strings because this is the form
required in sha1_name.c.  Sharing the list with the functions there is
a good idea to avoid duplicating the rules.  Hopefully this
facilitates unified matching rules in the future.

This commit makes the rules used by rev-parse for resolving refs to
sha1s available for string comparison.  Before this change, the rules
were buried in get_sha1*() and dwim_ref().

A follow-up commit will refactor the rules used by fetch.

refname_match() will be used for matching refspecs in git-send-pack.

Thanks to Daniel Barkalow <barkalow@iabervon.org> for pointing
out that ref_matches_abbrev in remote.c solves a similar problem
and care should be taken to avoid confusion.

Signed-off-by: Steffen Prohaska <prohaska@zib.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2007-11-18 18:39:00 -08:00
Jeff King
2a0fe89a97 send-pack: tighten remote error reporting
Previously, we set all ref pushes to 'OK', and then marked
them as errors if the remote reported so. This has the
problem that if the remote dies or fails to report a ref, we
just assume it was OK.

Instead, we use a new non-OK state to indicate that we are
expecting status (if the remote doesn't support the
report-status feature, we fall back on the old behavior).
Thus we can flag refs for which we expected a status, but
got none (conversely, we now also print a warning for refs
for which we get a status, but weren't expecting one).

This also allows us to simplify the receive_status exit
code, since each ref is individually marked with failure
until we get a success response. We can just print the usual
status table, so the user still gets a sense of what we were
trying to do when the failure happened.

Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2007-11-18 02:34:52 -08:00
Jeff King
cda69f481d make "find_ref_by_name" a public function
This was a static in remote.c, but is generally useful.

Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2007-11-18 02:34:34 -08:00
Shawn O. Pearce
9f8a15c734 Fix warning about bitfield in struct ref
cache.h:503: warning: type of bit-field 'force' is a GCC extension
cache.h:504: warning: type of bit-field 'merge' is a GCC extension
cache.h:505: warning: type of bit-field 'nonfastforward' is a GCC extension
cache.h:506: warning: type of bit-field 'deletion' is a GCC extension

So we change it to an 'unsigned int' which is not a GCC extension.

Signed-off-by: Shawn O. Pearce <spearce@spearce.org>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2007-11-18 02:23:25 -08:00
Jeff King
ca74c458a3 send-pack: assign remote errors to each ref
This lets us show remote errors (e.g., a denied hook) along
with the usual push output.

There is a slightly clever optimization in receive_status
that bears explanation. We need to correlate the returned
status and our ref objects, which naively could be an O(m*n)
operation. However, since the current implementation of
receive-pack returns the errors to us in the same order that
we sent them, we optimistically look for the next ref to be
looked up to come after the last one we have found. So it
should be an O(m+n) merge if the receive-pack behavior
holds, but we fall back to a correct but slower behavior if
it should change.

Signed-off-by: Jeff King <peff@peff.net>
Acked-by: Daniel Barkalow <barkalow@iabervon.org>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2007-11-17 12:10:50 -08:00
Jeff King
8736a84890 send-pack: track errors for each ref
Instead of keeping the 'ret' variable, we instead have a
status flag for each ref that tracks what happened to it.
We then print the ref status after all of the refs have
been examined.

This paves the way for three improvements:
  - updating tracking refs only for non-error refs
  - incorporating remote rejection into the printed status
  - printing errors in a different order than we processed
    (e.g., consolidating non-ff errors near the end with
    a special message)

Signed-off-by: Jeff King <peff@peff.net>
Acked-by: Alex Riesen <raa.lkml@gmail.com>
Acked-by: Daniel Barkalow <barkalow@iabervon.org>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2007-11-17 12:10:50 -08:00
Johannes Sixt
506b17b136 Introduce git_etc_gitconfig() that encapsulates access of ETC_GITCONFIG.
In a subsequent patch the path to the system-wide config file will be
computed. This is a preparation for that change. It turns all accesses
of ETC_GITCONFIG into function calls. There is no change in behavior.

As a consequence, config.c is the only file that needs the definition of
ETC_GITCONFIG. Hence, -DETC_GITCONFIG is removed from the CFLAGS and a
special build rule for config.c is introduced. As a side-effect, changing
the defintion of ETC_GITCONFIG (e.g. in config.mak) does not trigger a
complete rebuild anymore.

Signed-off-by: Johannes Sixt <johannes.sixt@telecom.at>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2007-11-14 15:18:39 -08:00
Johannes Schindelin
4723ee992c Close files opened by lock_file() before unlinking.
This is needed on Windows since open files cannot be unlinked.

Signed-off-by: Johannes Sixt <johannes.sixt@telecom.at>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2007-11-14 15:18:39 -08:00
Junio C Hamano
039bc64e88 core.excludesfile clean-up
There are inconsistencies in the way commands currently handle
the core.excludesfile configuration variable.  The problem is
the variable is too new to be noticed by anything other than
git-add and git-status.

 * git-ls-files does not notice any of the "ignore" files by
   default, as it predates the standardized set of ignore files.
   The calling scripts established the convention to use
   .git/info/exclude, .gitignore, and later core.excludesfile.

 * git-add and git-status know about it because they call
   add_excludes_from_file() directly with their own notion of
   which standard set of ignore files to use.  This is just a
   stupid duplication of code that need to be updated every time
   the definition of the standard set of ignore files is
   changed.

 * git-read-tree takes --exclude-per-directory=<gitignore>,
   not because the flexibility was needed.  Again, this was
   because the option predates the standardization of the ignore
   files.

 * git-merge-recursive uses hardcoded per-directory .gitignore
   and nothing else.  git-clean (scripted version) does not
   honor core.* because its call to underlying ls-files does not
   know about it.  git-clean in C (parked in 'pu') doesn't either.

We probably could change git-ls-files to use the standard set
when no excludes are specified on the command line and ignore
processing was asked, or something like that, but that will be a
change in semantics and might break people's scripts in a subtle
way.  I am somewhat reluctant to make such a change.

On the other hand, I think it makes perfect sense to fix
git-read-tree, git-merge-recursive and git-clean to follow the
same rule as other commands.  I do not think of a valid use case
to give an exclude-per-directory that is nonstandard to
read-tree command, outside a "negative" test in the t1004 test
script.

This patch is the first step to untangle this mess.

The next step would be to teach read-tree, merge-recursive and
clean (in C) to use setup_standard_excludes().

Signed-off-by: Junio C Hamano <gitster@pobox.com>
2007-11-14 15:08:04 -08:00
Junio C Hamano
c78a24986d Merge branch 'jc/maint-add-sync-stat'
* jc/maint-add-sync-stat:
  t2200: test more cases of "add -u"
  git-add: make the entry stat-clean after re-adding the same contents
  ce_match_stat, run_diff_files: use symbolic constants for readability

Conflicts:

	builtin-add.c
2007-11-14 14:15:40 -08:00
Junio C Hamano
a108e53861 Merge branch 'db/remote-builtin' into jk/send-pack
* db/remote-builtin:
  Reteach builtin-ls-remote to understand remotes
  Build in ls-remote
  Use built-in send-pack.
  Build-in send-pack, with an API for other programs to call.
  Build-in peek-remote, using transport infrastructure.
  Miscellaneous const changes and utilities

Conflicts:

	transport.c
2007-11-14 03:09:52 -08:00
Junio C Hamano
4bd5b7dacc ce_match_stat, run_diff_files: use symbolic constants for readability
ce_match_stat() can be told:

 (1) to ignore CE_VALID bit (used under "assume unchanged" mode)
     and perform the stat comparison anyway;

 (2) not to perform the contents comparison for racily clean
     entries and report mismatch of cached stat information;

using its "option" parameter.  Give them symbolic constants.

Similarly, run_diff_files() can be told not to report anything
on removed paths.  Also give it a symbolic constant for that.

Signed-off-by: Junio C Hamano <gitster@pobox.com>
2007-11-10 00:24:51 -08:00
Junio C Hamano
0380074315 Merge branch 'ds/maint-deflatebound'
* ds/maint-deflatebound:
  Improve accuracy of check for presence of deflateBound.
2007-11-07 18:17:20 -08:00
David Symonds
609a2289d7 Improve accuracy of check for presence of deflateBound.
ZLIB_VERNUM isn't defined in some zlib versions, so this patch does a proper
linking test in autoconf to see whether deflateBound exists in zlib. Also,
setting NO_DEFLATE_BOUND will also work for folk not using autoconf.

Signed-off-by: David Symonds <dsymonds@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2007-11-07 17:06:14 -08:00
Mike Hommey
59f0f2f33a Refactor working tree setup
Create a setup_work_tree() that can be used from any command requiring
a working tree conditionally.

Signed-off-by: Mike Hommey <mh@glandium.org>
Acked-by: Johannes Schindelin <Johannes.Schindelin@gmx.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2007-11-05 22:47:57 -08:00
Daniel Barkalow
4577370e9b Miscellaneous const changes and utilities
The list of remote refs in struct transport should be const, because
builtin-fetch will get confused if it changes.

The url in git_connect should be const (and work on a copy) instead of
requiring the caller to copy it.

match_refs doesn't modify the refspecs it gets.

get_fetch_map and get_remote_ref don't change the list they get.

Allow transport get_refs_list methods to modify the struct transport.

Add a function to copy a list of refs, when a function needs a mutable
copy of a const list.

Add a function to check the type of a ref, as per the code in connect.c

Signed-off-by: Daniel Barkalow <barkalow@iabervon.org>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2007-11-02 22:40:43 -07:00
Junio C Hamano
459fa6d0fe git-diff: complain about >=8 consecutive spaces in initial indent
This introduces a new whitespace error type, "indent-with-non-tab".
The error is about starting a line with 8 or more SP, instead of
indenting it with a HT.

This is not enabled by default, as some projects employ an
indenting policy to use only SPs and no HTs.

The kernel folks and git contributors may want to enable this
detection with:

	[core]
		whitespace = indent-with-non-tab

Signed-off-by: Junio C Hamano <gitster@pobox.com>
2007-11-02 17:58:09 -07:00
Junio C Hamano
a9cc857ada War on whitespace: first, a bit of retreat.
This introduces core.whitespace configuration variable that lets
you specify the definition of "whitespace error".

Currently there are two kinds of whitespace errors defined:

 * trailing-space: trailing whitespaces at the end of the line.

 * space-before-tab: a SP appears immediately before HT in the
   indent part of the line.

You can specify the desired types of errors to be detected by
listing their names (unique abbreviations are accepted)
separated by comma.  By default, these two errors are always
detected, as that is the traditional behaviour.  You can disable
detection of a particular type of error by prefixing a '-' in
front of the name of the error, like this:

	[core]
		whitespace = -trailing-space

This patch teaches the code to output colored diff with
DIFF_WHITESPACE color to highlight the detected whitespace
errors to honor the new configuration.

Signed-off-by: Junio C Hamano <gitster@pobox.com>
2007-11-02 17:58:08 -07:00
Johannes Sixt
98158e9cfd Change git_connect() to return a struct child_process instead of a pid_t.
This prepares the API of git_connect() and finish_connect() to operate on
a struct child_process. Currently, we just use that object as a placeholder
for the pid that we used to return. A follow-up patch will change the
implementation of git_connect() and finish_connect() to make full use
of the object.

Old code had early-return-on-error checks at the calling sites of
git_connect(), but since git_connect() dies on errors anyway, these checks
were removed.

[sp: Corrected style nit of "conn == NULL" to "!conn"]

Signed-off-by: Johannes Sixt <johannes.sixt@telecom.at>
Signed-off-by: Shawn O. Pearce <spearce@spearce.org>
2007-10-21 01:30:39 -04:00
Shawn O. Pearce
2e13e5d892 Merge branch 'master' into db/fetch-pack
There's a number of tricky conflicts between master and
this topic right now due to the rewrite of builtin-push.
Junio must have handled these via rerere; I'd rather not
deal with them again so I'm pre-merging master into the
topic.  Besides this topic somehow started to depend on
the strbuf series that was in next, but is now in master.
It no longer compiles on its own without the strbuf API.

* master: (184 commits)
  Whip post 1.5.3.4 maintenance series into shape.
  Minor usage update in setgitperms.perl
  manual: use 'URL' instead of 'url'.
  manual: add some markup.
  manual: Fix example finding commits referencing given content.
  Fix wording in push definition.
  Fix some typos, punctuation, missing words, minor markup.
  manual: Fix or remove em dashes.
  Add a --dry-run option to git-push.
  Add a --dry-run option to git-send-pack.
  Fix in-place editing functions in convert.c
  instaweb: support for Ruby's WEBrick server
  instaweb: allow for use of auto-generated scripts
  Add 'git-p4 commit' as an alias for 'git-p4 submit'
  hg-to-git speedup through selectable repack intervals
  git-svn: respect Subversion's [auth] section configuration values
  gtksourceview2 support for gitview
  fix contrib/hooks/post-receive-email hooks.recipients error message
  Support cvs via git-shell
  rebase -i: use diff plumbing instead of porcelain
  ...

Conflicts:

	Makefile
	builtin-push.c
	rsh.c
2007-10-16 00:15:25 -04:00
Junio C Hamano
66d4035e10 Merge branch 'ph/strbuf'
* ph/strbuf: (44 commits)
  Make read_patch_file work on a strbuf.
  strbuf_read_file enhancement, and use it.
  strbuf change: be sure ->buf is never ever NULL.
  double free in builtin-update-index.c
  Clean up stripspace a bit, use strbuf even more.
  Add strbuf_read_file().
  rerere: Fix use of an empty strbuf.buf
  Small cache_tree_write refactor.
  Make builtin-rerere use of strbuf nicer and more efficient.
  Add strbuf_cmp.
  strbuf_setlen(): do not barf on setting length of an empty buffer to 0
  sq_quote_argv and add_to_string rework with strbuf's.
  Full rework of quote_c_style and write_name_quoted.
  Rework unquote_c_style to work on a strbuf.
  strbuf API additions and enhancements.
  nfv?asprintf are broken without va_copy, workaround them.
  Fix the expansion pattern of the pseudo-static path buffer.
  builtin-for-each-ref.c::copy_name() - do not overstep the buffer.
  builtin-apply.c: fix a tiny leak introduced during xmemdupz() conversion.
  Use xmemdupz() in many places.
  ...
2007-10-03 03:06:02 -07:00
Junio C Hamano
0341091a9e Merge branch 'jc/autogc'
* jc/autogc:
  git-gc --auto: run "repack -A -d -l" as necessary.
  git-gc --auto: restructure the way "repack" command line is built.
  git-gc --auto: protect ourselves from accumulated cruft
  git-gc --auto: add documentation.
  git-gc --auto: move threshold check to need_to_gc() function.
  repack -A -d: use --keep-unreachable when repacking
  pack-objects --keep-unreachable
  Export matches_pack_name() and fix its return value
  Invoke "git gc --auto" from commit, merge, am and rebase.
  Implement git gc --auto
2007-10-03 03:05:32 -07:00