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Author SHA1 Message Date
Junio C Hamano
988f98f61f Merge branch 'jx/clean-interactive'
Add "interactive" mode to "git clean".

The early part to refactor relative path related helper functions
looked sensible.

* jx/clean-interactive:
  test: run testcases with POSIX absolute paths on Windows
  test: add t7301 for git-clean--interactive
  git-clean: add documentation for interactive git-clean
  git-clean: add ask each interactive action
  git-clean: add select by numbers interactive action
  git-clean: add filter by pattern interactive action
  git-clean: use a git-add-interactive compatible UI
  git-clean: add colors to interactive git-clean
  git-clean: show items of del_list in columns
  git-clean: add support for -i/--interactive
  git-clean: refactor git-clean into two phases
  write_name{_quoted_relative,}(): remove redundant parameters
  quote_path_relative(): remove redundant parameter
  quote.c: substitute path_relative with relative_path
  path.c: refactor relative_path(), not only strip prefix
  test: add test cases for relative_path
2013-07-22 11:24:11 -07:00
Junio C Hamano
cb29dfde48 Merge branch 'tr/protect-low-3-fds'
When "git" is spawned in such a way that any of the low 3 file
descriptors is closed, our first open() may yield file descriptor 2,
and writing error message to it would screw things up in a big way.

* tr/protect-low-3-fds:
  git: ensure 0/1/2 are open in main()
  daemon/shell: refactor redirection of 0/1/2 from /dev/null
2013-07-22 11:23:35 -07:00
Thomas Rast
1d999ddd1d daemon/shell: refactor redirection of 0/1/2 from /dev/null
Both daemon.c and shell.c contain logic to open FDs 0/1/2 from
/dev/null if they are not already open.  Move the function in daemon.c
to setup.c and use it in shell.c, too.

While there, remove a 'not' that inverted the meaning of the comment.
The point is indeed to *avoid* messing up.

Signed-off-by: Thomas Rast <trast@inf.ethz.ch>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2013-07-17 12:50:34 -07:00
Jiang Xin
e02ca72f70 path.c: refactor relative_path(), not only strip prefix
Original design of relative_path() is simple, just strip the prefix
(*base) from the absolute path (*abs).

In most cases, we need a real relative path, such as: ../foo,
../../bar.  That's why there is another reimplementation
(path_relative()) in quote.c.

Borrow some codes from path_relative() in quote.c to refactor
relative_path() in path.c, so that it could return real relative
path, and user can reuse this function without reimplementing
his/her own.  The function path_relative() in quote.c will be
substituted, and I would use the new relative_path() function when
implementing the interactive git-clean later.

Different results for relative_path() before and after this refactor:

    abs path  base path  relative (original)  relative (refactor)
    ========  =========  ===================  ===================
    /a/b      /a/b       .                    ./
    /a/b/     /a/b       .                    ./
    /a        /a/b/      /a                   ../
    /         /a/b/      /                    ../../
    /a/c      /a/b/      /a/c                 ../c
    /x/y      /a/b/      /x/y                 ../../x/y

    a/b/      a/b/       .                    ./
    a/b/      a/b        .                    ./
    a         a/b        a                    ../
    x/y       a/b/       x/y                  ../../x/y
    a/c       a/b        a/c                  ../c

    (empty)   (null)     (empty)              ./
    (empty)   (empty)    (empty)              ./
    (empty)   /a/b       (empty)              ./
    (null)    (null)     (null)               ./
    (null)    (empty)    (null)               ./
    (null)    /a/b       (segfault)           ./

You may notice that return value "." has been changed to "./".
It is because:

 * Function quote_path_relative() in quote.c will show the relative
   path as "./" if abs(in) and base(prefix) are the same.

 * Function relative_path() is called only once (in setup.c), and
   it will be OK for the return value as "./" instead of ".".

Signed-off-by: Jiang Xin <worldhello.net@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2013-06-26 09:59:00 -07:00
Junio C Hamano
51ebd0fe9e Merge branch 'lf/setup-prefix-pathspec'
"git cmd -- ':(top'" was not diagnosed as an invalid syntax, and
instead the parser kept reading beyond the end of the string.

* lf/setup-prefix-pathspec:
  setup.c: check that the pathspec magic ends with ")"
  setup.c: stop prefix_pathspec() from looping past the end of string
2013-03-25 14:01:00 -07:00
Junio C Hamano
fb3b7b1f95 Merge branch 'jk/alias-in-bare'
An aliased command spawned from a bare repository that does not say
it is bare with "core.bare = yes" is treated as non-bare by mistake.

* jk/alias-in-bare:
  setup: suppress implicit "." work-tree for bare repos
  environment: add GIT_PREFIX to local_repo_env
  cache.h: drop LOCAL_REPO_ENV_SIZE
2013-03-25 14:00:44 -07:00
Andrew Wong
f612a67eac setup.c: check that the pathspec magic ends with ")"
The previous code did not diagnose an incorrectly spelled ":(top"
as an error.

Signed-off-by: Andrew Wong <andrew.kw.w@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2013-03-14 09:39:36 -07:00
Andrew Wong
772e47cd67 setup.c: stop prefix_pathspec() from looping past the end of string
The code assumes that the string ends at either `)` or `,`, and does
not handle the case where strcspn() returns length due to end of
string.  So specifying ":(top" as pathspec will cause the loop to go
past the end of string.

Signed-off-by: Andrew Wong <andrew.kw.w@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2013-03-14 09:39:09 -07:00
Jeff King
2cd83d10bb setup: suppress implicit "." work-tree for bare repos
If an explicit GIT_DIR is given without a working tree, we
implicitly assume that the current working directory should
be used as the working tree. E.g.,:

  GIT_DIR=/some/repo.git git status

would compare against the cwd.

Unfortunately, we fool this rule for sub-invocations of git
by setting GIT_DIR internally ourselves. For example:

  git init foo
  cd foo/.git
  git status ;# fails, as we expect
  git config alias.st status
  git status ;# does not fail, but should

What happens is that we run setup_git_directory when doing
alias lookup (since we need to see the config), set GIT_DIR
as a result, and then leave GIT_WORK_TREE blank (because we
do not have one). Then when we actually run the status
command, we do setup_git_directory again, which sees our
explicit GIT_DIR and uses the cwd as an implicit worktree.

It's tempting to argue that we should be suppressing that
second invocation of setup_git_directory, as it could use
the values we already found in memory. However, the problem
still exists for sub-processes (e.g., if "git status" were
an external command).

You can see another example with the "--bare" option, which
sets GIT_DIR explicitly. For example:

  git init foo
  cd foo/.git
  git status ;# fails
  git --bare status ;# does NOT fail

We need some way of telling sub-processes "even though
GIT_DIR is set, do not use cwd as an implicit working tree".
We could do it by putting a special token into
GIT_WORK_TREE, but the obvious choice (an empty string) has
some portability problems.

Instead, we add a new boolean variable, GIT_IMPLICIT_WORK_TREE,
which suppresses the use of cwd as a working tree when
GIT_DIR is set. We trigger the new variable when we know we
are in a bare setting.

The variable is left intentionally undocumented, as this is
an internal detail (for now, anyway). If somebody comes up
with a good alternate use for it, and once we are confident
we have shaken any bugs out of it, we can consider promoting
it further.

Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2013-03-08 14:02:40 -08:00
Jeff King
a6f7f9a325 environment: add GIT_PREFIX to local_repo_env
The GIT_PREFIX variable is set based on our location within
the working tree. It should therefore be cleared whenever
GIT_WORK_TREE is cleared.

In practice, this doesn't cause any bugs, because none of
the sub-programs we invoke with local_repo_env cleared
actually care about GIT_PREFIX. But this is the right thing
to do, and future proofs us against that assumption changing.

While we're at it, let's define a GIT_PREFIX_ENVIRONMENT
macro; this avoids repetition of the string literal, which
can help catch any spelling mistakes in the code.

Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2013-03-08 14:02:31 -08:00
Junio C Hamano
3e07d2683d Merge branch 'mh/maint-ceil-absolute'
An earlier workaround designed to help people who list logical
directories that will not match what getcwd(3) returns in the
GIT_CEILING_DIRECTORIES had an adverse effect when it is slow to
stat and readlink a directory component of an element listed on it.

* mh/maint-ceil-absolute:
  Provide a mechanism to turn off symlink resolution in ceiling paths
2013-02-27 09:47:28 -08:00
Michael Haggerty
7ec30aaa5b Provide a mechanism to turn off symlink resolution in ceiling paths
Commit 1b77d83cab 'setup_git_directory_gently_1(): resolve symlinks
in ceiling paths' changed the setup code to resolve symlinks in the
entries in GIT_CEILING_DIRECTORIES.  Because those entries are
compared textually to the symlink-resolved current directory, an
entry in GIT_CEILING_DIRECTORIES that contained a symlink would have
no effect.  It was known that this could cause performance problems
if the symlink resolution *itself* touched slow filesystems, but it
was thought that such use cases would be unlikely.  The intention of
the earlier change was to deal with a case when the user has this:

	GIT_CEILING_DIRECTORIES=/home/gitster

but in reality, /home/gitster is a symbolic link to somewhere else,
e.g. /net/machine/home4/gitster. A textual comparison between the
specified value /home/gitster and the location getcwd(3) returns
would not help us, but readlink("/home/gitster") would still be
fast.

After this change was released, Anders Kaseorg <andersk@mit.edu>
reported:

> [...] my computer has been acting so slow when I’m not connected to
> the network.  I put various network filesystem paths in
> $GIT_CEILING_DIRECTORIES, such as
> /afs/athena.mit.edu/user/a/n/andersk (to avoid hitting its parents
> /afs/athena.mit.edu, /afs/athena.mit.edu/user/a, and
> /afs/athena.mit.edu/user/a/n which all live in different AFS
> volumes).  Now when I’m not connected to the network, every
> invocation of Git, including the __git_ps1 in my shell prompt, waits
> for AFS to timeout.

To allow users to work around this problem, give them a mechanism to
turn off symlink resolution in GIT_CEILING_DIRECTORIES entries.  All
the entries that follow an empty entry will not be checked for symbolic
links and used literally in comparison.  E.g. with these:

	GIT_CEILING_DIRECTORIES=:/foo/bar:/xyzzy or
	GIT_CEILING_DIRECTORIES=/foo/bar::/xyzzy

we will not readlink("/xyzzy") because it comes after an empty entry.

With the former (but not with the latter), "/foo/bar" comes after an
empty entry, and we will not readlink it, either.

Signed-off-by: Michael Haggerty <mhagger@alum.mit.edu>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2013-02-22 11:37:34 -08:00
Junio C Hamano
7b5196909c Merge branch 'nd/magic-pathspec-from-root'
When giving arguments without "--" disambiguation, object names
that come  earlier on the command line must not be interpretable as
pathspecs and pathspecs that come later on the command line must
not be interpretable as object names.  Tweak the disambiguation
rule so that ":/" (no other string before or after) is always
interpreted as a pathspec, to avoid having to say "git cmd -- :/".

* nd/magic-pathspec-from-root:
  grep: avoid accepting ambiguous revision
  Update :/abc ambiguity check
2013-01-30 08:52:53 -08:00
Junio C Hamano
a39b15b4f6 Merge branch 'as/check-ignore'
Add a new command "git check-ignore" for debugging .gitignore
files.

The variable names may want to get cleaned up but that can be done
in-tree.

* as/check-ignore:
  clean.c, ls-files.c: respect encapsulation of exclude_list_groups
  t0008: avoid brace expansion
  add git-check-ignore sub-command
  setup.c: document get_pathspec()
  add.c: extract new die_if_path_beyond_symlink() for reuse
  add.c: extract check_path_for_gitlink() from treat_gitlinks() for reuse
  pathspec.c: rename newly public functions for clarity
  add.c: move pathspec matchers into new pathspec.c for reuse
  add.c: remove unused argument from validate_pathspec()
  dir.c: improve docs for match_pathspec() and match_pathspec_depth()
  dir.c: provide clear_directory() for reclaiming dir_struct memory
  dir.c: keep track of where patterns came from
  dir.c: use a single struct exclude_list per source of excludes

Conflicts:
	builtin/ls-files.c
	dir.c
2013-01-23 21:19:10 -08:00
Nguyễn Thái Ngọc Duy
4db86e8b6e Update :/abc ambiguity check
:/abc may mean two things:

- as a revision, it means the revision that has "abc" in commit
  message.

- as a pathpec, it means "abc" from root.

Currently we see ":/abc" as a rev (most of the time), but never see it
as a pathspec even if "abc" exists and "git log :/abc" will gladly
take ":/abc" as rev even it's ambiguous. This patch makes it:

- ambiguous when "abc" exists on worktree
- a rev if abc does not exist on worktree
- a path if abc is not found in any commits (although better use
  "--" to avoid ambiguation because searching through commit DAG is
  expensive)

A plus from this patch is, because ":/" never matches anything as a
rev, it is never considered a valid rev and because root directory
always exists, ":/" is always unambiguously seen as a pathspec.

Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2013-01-21 16:57:24 -08:00
Adam Spiers
1794e6e097 setup.c: document get_pathspec()
Since we have just created a new pathspec-handling library, now is a
good time to add some comments explaining get_pathspec().

Signed-off-by: Adam Spiers <git@adamspiers.org>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2013-01-06 14:26:37 -08:00
Michael Haggerty
1b77d83cab setup_git_directory_gently_1(): resolve symlinks in ceiling paths
longest_ancestor_length() relies on a textual comparison of directory
parts to find the part of path that overlaps with one of the paths in
prefix_list.  But this doesn't work if any of the prefixes involves a
symbolic link, because the directories will look different even though
they might logically refer to the same directory.  So canonicalize the
paths listed in GIT_CEILING_DIRECTORIES using real_path_if_valid()
before passing them to longest_ancestor_length().  (Also rename
normalize_ceiling_entry() to canonicalize_ceiling_entry() to reflect
the change.)

path is already in canonical form, so doesn't need to be canonicalized
again.

This fixes some problems with using GIT_CEILING_DIRECTORIES that
contains paths involving symlinks, including t4035 if run with --root
set to a path involving symlinks.

Please note that test t0060 is *not* changed analogously, because that
would make the test suite results dependent on the contents of the
local root directory.  However, real_path() is already tested
independently, and the "ancestor" tests cover the non-normalization
aspects of longest_ancestor_length(), so coverage remains sufficient.

Signed-off-by: Michael Haggerty <mhagger@alum.mit.edu>
Signed-off-by: Jeff King <peff@peff.net>
2012-10-29 02:34:58 -04:00
Michael Haggerty
9e2326c7e1 longest_ancestor_length(): require prefix list entries to be normalized
Move the responsibility for normalizing prefixes from
longest_ancestor_length() to its callers. Use slightly different
normalizations at the two callers:

In setup_git_directory_gently_1(), use the old normalization, which
ignores paths that are not usable.  In the next commit we will change
this caller to also resolve symlinks in the paths from
GIT_CEILING_DIRECTORIES as part of the normalization.

In "test-path-utils longest_ancestor_length", use the old
normalization, but die() if any paths are unusable.  Also change t0060
to only pass normalized paths to the test program (no empty entries or
non-absolute paths, strip trailing slashes from the paths, and remove
tests that thereby become redundant).

The point of this change is to reduce the scope of the ancestor_length
tests in t0060 from testing normalization+longest_prefix to testing
only mostly longest_prefix.  This is necessary because when
setup_git_directory_gently_1() starts resolving symlinks as part of
its normalization, it will not be reasonable to do the same in the
test suite, because that would make the test results depend on the
contents of the root directory of the filesystem on which the test is
run.  HOWEVER: under Windows, bash mangles arguments that look like
absolute POSIX paths into DOS paths.  So we have to retain the level
of normalization done by normalize_path_copy() to convert the
bash-mangled DOS paths (which contain backslashes) into paths that use
forward slashes.

Signed-off-by: Michael Haggerty <mhagger@alum.mit.edu>
Signed-off-by: Jeff King <peff@peff.net>
2012-10-29 02:34:58 -04:00
Michael Haggerty
31171d9e45 longest_ancestor_length(): take a string_list argument for prefixes
Change longest_ancestor_length() to take the prefixes argument as a
string_list rather than as a colon-separated string.  This will make
it easier for the caller to alter the entries before calling
longest_ancestor_length().

Signed-off-by: Michael Haggerty <mhagger@alum.mit.edu>
Signed-off-by: Jeff King <peff@peff.net>
2012-10-29 02:34:58 -04:00
Junio C Hamano
e3f26752b5 Merge branch 'maint-1.7.11' into maint
* maint-1.7.11:
  Almost 1.7.11.6
  gitweb: URL-decode $my_url/$my_uri when stripping PATH_INFO
  rebase -i: use full onto sha1 in reflog
  sh-setup: protect from exported IFS
  receive-pack: do not leak output from auto-gc to standard output
  t/t5400: demonstrate breakage caused by informational message from prune
  setup: clarify error messages for file/revisions ambiguity
  send-email: improve RFC2047 quote parsing
  fsck: detect null sha1 in tree entries
  do not write null sha1s to on-disk index
  diff: do not use null sha1 as a sentinel value
2012-09-10 15:31:06 -07:00
Junio C Hamano
64336ebe34 Merge branch 'mm/die-with-dashdash-help'
When the user gives an argument that can be taken as both a revision
name and a pathname without disambiguating with "--", we used to
give a help message "Use '--' to separate".  The message has been
clarified to show where that '--' goes on the command line.

* mm/die-with-dashdash-help:
  setup: clarify error messages for file/revisions ambiguity
2012-08-22 11:51:53 -07:00
Matthieu Moy
4d4b573977 setup: clarify error messages for file/revisions ambiguity
The previous "Use '--' to separate filenames from revisions" may sound
obvious for an old-time Unix user, but does not make it clear how to use
this '--'. In addition to mentionning this '--', give an idea of what the
new command should look like.

Ideally, we could provide cut-and-paste ready commands based on the
command that just failed, but we have no easy access to argv[] in this
place of the code.

Signed-off-by: Matthieu Moy <Matthieu.Moy@imag.fr>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2012-08-03 09:06:30 -07:00
Junio C Hamano
0958a24d73 Merge branch 'jc/sha1-name-more'
Teaches the object name parser things like a "git describe" output
is always a commit object, "A" in "git log A" must be a committish,
and "A" and "B" in "git log A...B" both must be committish, etc., to
prolong the lifetime of abbreviated object names.

* jc/sha1-name-more: (27 commits)
  t1512: match the "other" object names
  t1512: ignore whitespaces in wc -l output
  rev-parse --disambiguate=<prefix>
  rev-parse: A and B in "rev-parse A..B" refer to committish
  reset: the command takes committish
  commit-tree: the command wants a tree and commits
  apply: --build-fake-ancestor expects blobs
  sha1_name.c: add support for disambiguating other types
  revision.c: the "log" family, except for "show", takes committish
  revision.c: allow handle_revision_arg() to take other flags
  sha1_name.c: introduce get_sha1_committish()
  sha1_name.c: teach lookup context to get_sha1_with_context()
  sha1_name.c: many short names can only be committish
  sha1_name.c: get_sha1_1() takes lookup flags
  sha1_name.c: get_describe_name() by definition groks only commits
  sha1_name.c: teach get_short_sha1() a commit-only option
  sha1_name.c: allow get_short_sha1() to take other flags
  get_sha1(): fix error status regression
  sha1_name.c: restructure disambiguation of short names
  sha1_name.c: correct misnamed "canonical" and "res"
  ...
2012-07-22 12:55:07 -07:00
Junio C Hamano
36c5109e4a Merge branch 'th/diff-no-index-fixes' into maint
"git diff --no-index" did not correctly handle relative paths and
did not correctly give exit codes when run under "--quiet" option.

* th/diff-no-index-fixes:
  diff-no-index: exit(1) if 'diff --quiet <repo file> <external file>' finds changes
  diff: handle relative paths in no-index
2012-07-11 12:48:44 -07:00
Junio C Hamano
9ca724933a Merge branch 'mm/verify-filename-fix' into maint
"git diff COPYING HEAD:COPYING" gave a nonsense error message that
claimed that the treeish HEAD did not have COPYING in it.

* mm/verify-filename-fix:
  verify_filename(): ask the caller to chose the kind of diagnosis
  sha1_name: do not trigger detailed diagnosis for file arguments
2012-07-11 12:45:49 -07:00
Junio C Hamano
60ad08bfdf Merge branch 'th/diff-no-index-fixes'
"git diff --no-index" did not correctly handle relative paths and
did not give correct exit codes when run under "--quiet" option.

* th/diff-no-index-fixes:
  diff-no-index: exit(1) if 'diff --quiet <repo file> <external file>' finds changes
  diff: handle relative paths in no-index
2012-07-04 23:40:38 -07:00
Junio C Hamano
8c135ea260 sha1_name.c: get rid of get_sha1_with_mode_1()
The only external caller is setup.c that tries to give a nicer error
message when an object name is misspelt (e.g. "HEAD:cashe.h").
Retire it and give the caller a dedicated and more intuitive API
function maybe_die_on_misspelt_object_name().

Signed-off-by: Junio C Hamano <gitster@pobox.com>
2012-07-03 10:22:37 -07:00
Junio C Hamano
08080894b7 Merge branch 'mm/verify-filename-fix'
"git diff COPYING HEAD:COPYING" gave a nonsense error message that
claimed that the treeish HEAD did not have COPYING in it.
2012-06-28 15:19:32 -07:00
Jeff King
546e0fd9e9 diff: handle relative paths in no-index
When diff-no-index is given a relative path to a file outside the
repository, it aborts with error. However, if the file is given
using an absolute path, the diff runs as expected. The two cases
should be treated the same.

Tests and commit message by Tim Henigan.

Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Tim Henigan <tim.henigan@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2012-06-22 10:20:18 -07:00
Matthieu Moy
023e37c377 verify_filename(): ask the caller to chose the kind of diagnosis
verify_filename() can be called in two different contexts. Either we
just tried to interpret a string as an object name, and it fails, so
we try looking for a working tree file (i.e. we finished looking at
revs that come earlier on the command line, and the next argument
must be a pathname), or we _know_ that we are looking for a
pathname, and shouldn't even try interpreting the string as an
object name.

For example, with this change, we get:

  $ git log COPYING HEAD:inexistant
  fatal: HEAD:inexistant: no such path in the working tree.
  Use '-- <path>...' to specify paths that do not exist locally.
  $ git log HEAD:inexistant
  fatal: Path 'inexistant' does not exist in 'HEAD'

Signed-off-by: Matthieu Moy <Matthieu.Moy@imag.fr>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2012-06-18 15:21:42 -07:00
Clemens Buchacher
2565b43bd2 properly keep track of current working directory
Various failure modes in the repository detection code path currently
quote the wrong directory in their error message. The working directory
is changed iteratively to the parent directory until a git repository is
found. If the working directory cannot be changed to the parent
directory for some reason, the detection gives up and prints an error
message. The error message should report the current working directory.

Instead of continually updating the 'cwd' variable, which is actually
used to remember the original working directory, the 'offset' variable
is used to keep track of the current working directory. At the point
where the affected error handling code is called, 'offset' already
points to the end of the parent of the working directory, rather than
the current working directory.

Fix this by explicitly using a variable 'offset_parent' and update
'offset' concurrently with the call to chdir.

In a similar fashion, the function get_device_or_die() would print the
original working directory in case of a failure, rather than the current
working directory. Fix this as well by making use of the 'offset'
variable.

Lastly, replace the phrase 'mount parent' with 'mount point'. The former
appears to be a typo.

Signed-off-by: Clemens Buchacher <drizzd@aon.at>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2012-04-15 13:28:02 -07:00
Jeff King
b3256eb8b3 standardize and improve lookup rules for external local repos
When you specify a local repository on the command line of
clone, ls-remote, upload-pack, receive-pack, or upload-archive,
or in a request to git-daemon, we perform a little bit of
lookup magic, doing things like looking in working trees for
.git directories and appending ".git" for bare repos.

For clone, this magic happens in get_repo_path. For
everything else, it happens in enter_repo. In both cases,
there are some ambiguous or confusing cases that aren't
handled well, and there is one case that is not handled the
same by both methods.

This patch tries to provide (and test!) standard, sensible
lookup rules for both code paths. The intended changes are:

  1. When looking up "foo", we have always preferred
     a working tree "foo" (containing "foo/.git" over the
     bare "foo.git". But we did not prefer a bare "foo" over
     "foo.git". With this patch, we do so.

  2. We would select directories that existed but didn't
     actually look like git repositories. With this patch,
     we make sure a selected directory looks like a git
     repo. Not only is this more sensible in general, but it
     will help anybody who is negatively affected by change
     (1) negatively (e.g., if they had "foo.git" next to its
     separate work tree "foo", and expect to keep finding
     "foo.git" when they reference "foo").

  3. The enter_repo code path would, given "foo", look for
     "foo.git/.git" (i.e., do the ".git" append magic even
     for a repo with working tree). The clone code path did
     not; with this patch, they now behave the same.

In the unlikely case of a working tree overlaying a bare
repo (i.e., a ".git" directory _inside_ a bare repo), we
continue to treat it as a working tree (prefering the
"inner" .git over the bare repo). This is mainly because the
combination seems nonsensical, and I'd rather stick with
existing behavior on the off chance that somebody is relying
on it.

Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2012-02-02 16:41:55 -08:00
Junio C Hamano
ca3ef81ad7 Merge branch 'cb/common-prefix-unification'
* cb/common-prefix-unification:
  rename pathspec_prefix() to common_prefix() and move to dir.[ch]
  consolidate pathspec_prefix and common_prefix
  remove prefix argument from pathspec_prefix
2011-10-10 15:56:17 -07:00
Junio C Hamano
efc5fb6a77 Merge branch 'fg/submodule-git-file-git-dir'
* fg/submodule-git-file-git-dir:
  Move git-dir for submodules
  rev-parse: add option --resolve-git-dir <path>

Conflicts:
	cache.h
	git-submodule.sh
2011-10-10 15:56:17 -07:00
Clemens Buchacher
f950eb9560 rename pathspec_prefix() to common_prefix() and move to dir.[ch]
Also make common_prefix_len() static as this refactoring makes dir.c
itself the only caller of this helper function.

Signed-off-by: Clemens Buchacher <drizzd@aon.at>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2011-09-12 14:38:32 -07:00
Junio C Hamano
4a085b16f4 consolidate pathspec_prefix and common_prefix
The implementation from pathspec_prefix (slightly modified) replaces the
current common_prefix, because it also respects glob characters.

Based on a patch by Clemens Buchacher.

Signed-off-by: Junio C Hamano <gitster@pobox.com>
2011-09-06 12:54:19 -07:00
Clemens Buchacher
5879f5684c remove prefix argument from pathspec_prefix
Passing a prefix to a function that is supposed to find the prefix is
strange. And it's really only used if the pathspec is NULL. Make the
callers handle this case instead.

As we are always returning a fresh copy of a string (or NULL), change the
type of the returned value to non-const "char *".

Signed-off-by: Clemens Buchacher <drizzd@aon.at>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2011-09-06 12:50:10 -07:00
Junio C Hamano
2730f55527 Merge branch 'nd/maint-clone-gitdir'
* nd/maint-clone-gitdir:
  clone: allow to clone from .git file
  read_gitfile_gently(): rename misnamed function to read_gitfile()
2011-08-28 21:20:28 -07:00
Junio C Hamano
e11fa9a460 Merge branch 'di/parse-options-split'
* di/parse-options-split:
  Reduce parse-options.o dependencies
  parse-options: export opterr, optbug
2011-08-25 16:00:20 -07:00
Junio C Hamano
13d6ec9133 read_gitfile_gently(): rename misnamed function to read_gitfile()
The function was not gentle at all to the callers and died without giving
them a chance to deal with possible errors. Rename it to read_gitfile(),
and update all the callers.

As no existing caller needs a true "gently" variant, we do not bother
adding one at this point.

Signed-off-by: Junio C Hamano <gitster@pobox.com>
2011-08-22 14:04:56 -07:00
Fredrik Gustafsson
abc06822af rev-parse: add option --resolve-git-dir <path>
Check if <path> is a valid git-dir or a valid git-file that points
to a valid git-dir.

We want tests to be independent from the fact that a git-dir may
be a git-file. Thus we changed tests to use this feature.

Signed-off-by: Fredrik Gustafsson <iveqy@iveqy.com>
Mentored-by: Jens Lehmann <Jens.Lehmann@web.de>
Mentored-by: Heiko Voigt <hvoigt@hvoigt.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2011-08-16 11:04:31 -07:00
Dmitry Ivankov
0687628466 Reduce parse-options.o dependencies
Currently parse-options.o pulls quite a big bunch of dependencies.
his complicates it's usage in contrib/ because it pulls external
dependencies and it also increases executables size.

Split off less generic and more internal to git part of
parse-options.c to parse-options-cb.c.

Move prefix_filename function from setup.c to abspath.c. abspath.o
and wrapper.o pull each other, so it's unlikely to increase the
dependencies. It was a dependency of parse-options.o that pulled
many others.

Now parse-options.o pulls just abspath.o, ctype.o, strbuf.o, usage.o,
wrapper.o, libc directly and strlcpy.o indirectly.

Signed-off-by: Dmitry Ivankov <divanorama@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2011-08-11 12:18:02 -07:00
Junio C Hamano
0af53e188a Merge branch 'cb/partial-commit-relative-pathspec'
* cb/partial-commit-relative-pathspec:
  commit: allow partial commits with relative paths
2011-08-11 11:04:28 -07:00
Clemens Buchacher
8894d53580 commit: allow partial commits with relative paths
In order to do partial commits, git-commit overlays a tree on the
cache and checks pathspecs against the result. Currently, the
overlaying is done using "prefix" which prevents relative pathspecs
with ".." and absolute pathspec from matching when they refer to
files not under "prefix" and absent from the index, but still in
the tree (i.e.  files staged for removal).

The point of providing a prefix at all is performance optimization.
If we say there is no common prefix for the files of interest, then
we have to read the entire tree into the index.

But even if we cannot use the working directory as a prefix, we can
still figure out if there is a common prefix for all given paths,
and use that instead. The pathspec_prefix() routine from ls-files.c
does exactly that.

Any use of global variables is removed from pathspec_prefix() so
that it can be called from commit.c.

Reported-by: Reuben Thomas <rrt@sc3d.org>
Analyzed-by: Michael J Gruber <git@drmicha.warpmail.net>
Signed-off-by: Clemens Buchacher <drizzd@aon.at>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2011-08-02 14:20:35 -07:00
Junio C Hamano
4ed54610e5 Merge branch 'da/git-prefix-everywhere' into next
* da/git-prefix-everywhere:
  t/t7503-pre-commit-hook.sh: Add GIT_PREFIX tests
  git-mergetool--lib: Make vimdiff retain the current directory
  git: Remove handling for GIT_PREFIX
  setup: Provide GIT_PREFIX to built-ins
2011-06-29 17:09:27 -07:00
Junio C Hamano
fb674d7671 Merge branch 'maint'
* maint:
  git-submodule.sh: separate parens by a space to avoid confusing some shells
  Documentation/technical/api-diff.txt: correct name of diff_unmerge()
  read_gitfile_gently: use ssize_t to hold read result
  remove tests of always-false condition
  rerere.c: diagnose a corrupt MERGE_RR when hitting EOF between TAB and '\0'
2011-05-30 00:09:55 -07:00
Junio C Hamano
5b42477b59 Merge branch 'jm/maint-misc-fix' into maint
* jm/maint-misc-fix:
  read_gitfile_gently: use ssize_t to hold read result
  remove tests of always-false condition
  rerere.c: diagnose a corrupt MERGE_RR when hitting EOF between TAB and '\0'
2011-05-30 00:09:41 -07:00
David Aguilar
1f5d271f5e setup: Provide GIT_PREFIX to built-ins
GIT_PREFIX was added in 7cf16a14f5 so that
aliases can know the directory from which a !alias was called.

Knowing the prefix relative to the root is helpful in other programs
so export it to built-ins as well.

Helped-by: Michael J Gruber <git@drmicha.warpmail.net>
Signed-off-by: David Aguilar <davvid@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2011-05-26 15:05:33 -07:00
Jeff King
b1905aeac5 read_gitfile_gently: use ssize_t to hold read result
Otherwise, a negative error return becomes a very large read
value. We catch this in practice because we compare the
expected and actual numbers of bytes (and you are not likely
to be reading (size_t)-1 bytes), but this makes the
correctness a little more obvious.

Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2011-05-26 11:25:13 -07:00
Junio C Hamano
be5ab43566 Merge branch 'jc/magic-pathspec'
* jc/magic-pathspec:
  setup.c: Fix some "symbol not declared" sparse warnings
  t3703: Skip tests using directory name ":" on Windows
  revision.c: leave a note for "a lone :" enhancement
  t3703, t4208: add test cases for magic pathspec
  rev/path disambiguation: further restrict "misspelled index entry" diag
  fix overslow :/no-such-string-ever-existed diagnostics
  fix overstrict :<path> diagnosis
  grep: use get_pathspec() correctly
  pathspec: drop "lone : means no pathspec" from get_pathspec()
  Revert "magic pathspec: add ":(icase)path" to match case insensitively"
  magic pathspec: add ":(icase)path" to match case insensitively
  magic pathspec: futureproof shorthand form
  magic pathspec: add tentative ":/path/from/top/level" pathspec support
2011-05-23 09:58:35 -07:00