Commit Graph

881 Commits

Author SHA1 Message Date
Junio C Hamano
b574c8d846 Merge branch 'ds/maint-deflatebound' into maint
* ds/maint-deflatebound:
  Improve accuracy of check for presence of deflateBound.
2007-11-16 21:14:17 -08:00
Jonas Fonseca
7f55cf451c Documentation: Fix man page breakage with DocBook XSL v1.72
From version 1.72 it will replace all dots in roff requests with U+2302
("house" character), and add escaping in output for all instances of dot
that are not in roff requests. This caused the ".ft" hack forcing
monospace font in listingblocks to end up as "\&.ft" and being visible
in the resulting man page.

The fix adds a DOCBOOK_XSL_172 build variable that will disable the
hack. To allow this variable to be defined in config.mak it also moves
build variable handling below the inclusion of config.mak.

Signed-off-by: Jonas Fonseca <fonseca@diku.dk>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2007-11-14 02:01:54 -08:00
Junio C Hamano
d349a03e74 Makefile: add missing dependency on wt-status.h
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2007-11-08 16:41:56 -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
Alex Riesen
d1a2057560 Fix generation of perl/perl.mak
The code generating perl/Makefile from Makefile.PL was causing trouble
because it didn't considered NO_PERL_MAKEMAKER and ran makemaker
unconditionally, rewriting perl.mak. Makemaker is FUBAR in ActiveState Perl,
and perl/Makefile has a replacement for it.

Besides, a changed Git.pm is *NOT* a reason to rebuild all the perl scripts,
so remove the dependency too.

Signed-off-by: Alex Riesen <raa.lkml@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2007-10-26 16:44:45 -07:00
Mathias Megyei
922aa807f5 Do not remove distributed configure script
Before this patch the clean target has removed the
configure script that comes with Git tar file.
That made compiling Git for different architectures
inconvenient.
This patch excludes configure from the files to be
deleted by 'make clean' and adds new target 'distclean'
to preserve old functionality.

Signed-off-by: Mathias Megyei <mathias@mnet-mail.de>
Signed-off-by: Lars Hjemli <hjemli@gmail.com>
Signed-off-by: Shawn O. Pearce <spearce@spearce.org>
2007-10-15 21:12:06 -04:00
Jim Meyering
e883932f7d unexpected Make output (e.g. from --debug) causes build failure
Without this, the extra output produced e.g., by "make --debug"
would go into $INSTLIBDIR and then cause the sed command to fail.

Signed-off-by: Jim Meyering <jim@meyering.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2007-09-25 00:30:16 -07:00
Dmitry V. Levin
6b1b40d9f4 Makefile: Add cache-tree.h to the headers list
The dependency was missing.

Signed-off-by: Dmitry V. Levin <ldv@altlinux.org>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2007-09-05 23:08:22 -07:00
Junio C Hamano
fa8fe28c60 Makefile: do not allow gnu make to remove test-*.o files
It appears parallel build (-j) gets confused.

Signed-off-by: Junio C Hamano <gitster@pobox.com>
2007-08-30 19:14:31 -07:00
Junio C Hamano
55d1932bce Merge branch 'cr/tag'
* cr/tag:
  Teach "git stripspace" the --strip-comments option
  Make verify-tag a builtin.
  builtin-tag.c: Fix two memory leaks and minor notation changes.
  launch_editor(): Heed GIT_EDITOR and core.editor settings
  Make git tag a builtin.
2007-08-10 23:17:46 -07:00
David Kastrup
4739809cd0 Add support for an info version of the user manual
These patches use docbook2x in order to create an info version of the
git user manual.  No existing Makefile targets (including "all") are
touched, so you need to explicitly say

make info
sudo make install-info

to get git.info created and installed.  If the info target directory
does not already contain a "dir" file, no directory entry is created.
This facilitates $(DESTDIR)-based installations.  The same could be
achieved with

sudo make INSTALL_INFO=: install-info

explicitly.

perl is used for patching up sub-par file and directory information in
the Texinfo file.  It would be cleaner to place the respective info
straight into user-manual.txt or the conversion configurations, but I
find myself unable to find out how to do this with Asciidoc/Texinfo.

Signed-off-by: David Kastrup <dak@gnu.org>
2007-08-10 23:16:18 -07:00
Thomas Schwinge
c29ba0c3ed Support building on GNU/Hurd
GNU/Hurd systems don't have strlcpy.

Signed-off-by: Thomas Schwinge <tschwinge@gnu.org>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2007-08-02 17:26:02 -07:00
Johannes Schindelin
e5392c5146 Add is_absolute_path() and make_absolute_path()
This patch adds convenience functions to work with absolute paths.
The function is_absolute_path() should help the efforts to integrate
the MinGW fork.

Note that make_absolute_path() returns a pointer to a static buffer.

Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2007-08-01 00:38:30 -07:00
Robert Schiele
10861beaa8 make the name of the library directory a config option
Introduce new makefile variable lib to hold the name of the lib
directory ("lib" by default).  Also introduce a switch for configure
to specify this name with --with-lib=ARG.  This is useful for systems
that use a different name than "lib" (like "lib64" on some 64 bit
Linux architectures).

Signed-off-by: Robert Schiele <rschiele@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2007-07-31 22:36:55 -07:00
Robert Schiele
bef19da9b6 add option to find zlib in custom path
Some systems do not provide zlib development headers and libraries in
default search path of the compiler.  For these systems we should allow
specifying the location by --with-zlib=PATH or by setting ZLIB_PATH in
the makefile.

Signed-off-by: Robert Schiele <rschiele@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2007-07-31 01:23:43 -07:00
David Kastrup
89b2f19cb5 Makefile: use $(FIND) instead of find
Some people might prefer to be able to specify the find utility to
use.

Signed-off-by: David Kastrup <dak@gnu.org>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2007-07-29 15:23:28 -07:00
Carlos Rica
2ae68fcb78 Make verify-tag a builtin.
This replaces "git-verify-tag.sh" with "builtin-verify-tag.c".

Testing relies on the "git tag -v" tests calling this command.

A temporary file is needed when calling to gpg, because git is
already creating detached signatures (gpg option -b) to sign tags
(instead of leaving gpg to add the signature to the file by itself),
and those signatures need to be supplied in a separate file to be
verified by gpg.

The program uses git_mkstemp to create that temporary file needed by
gpg, instead of the previously used "$GIT_DIR/.tmp-vtag", in order to
allow the command to be used in read-only repositories, and also
prevent other instances of git to read or remove the same file.

Signal SIGPIPE is ignored because the program sometimes was
terminated because that signal when writing the input for gpg.

The command now can receive many tag names to be verified.
Documentation is also updated here to reflect this new behaviour.

Signed-off-by: Carlos Rica <jasampler@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2007-07-26 22:51:27 -07:00
Carlos Rica
62e09ce998 Make git tag a builtin.
This replaces the script "git-tag.sh" with "builtin-tag.c".

The existing test suite for "git tag" guarantees the compatibility
with the features provided by the script version.

There are some minor changes in the behaviour of "git tag" here:
"git tag -v" now can get more than one tag to verify, like "git tag -d" does,
"git tag" with no arguments prints all tags, more like "git branch" does,
and "git tag -n" also prints all tags with annotations (without needing -l).
Tests and documentation were also updated to reflect these changes.

The program is currently calling the script "git verify-tag" for verify.
This can be changed porting it to C and calling its functions directly
from builtin-tag.c.

Signed-off-by: Carlos Rica <jasampler@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2007-07-20 01:27:25 -07:00
Sean
f979492354 Remove "WITH_P4IMPORT" knob from the Makefile
Signed-off-by: Sean Estabrooks <seanlkml@sympatico.ca>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2007-07-15 15:23:36 -07:00
Emil Medve
4cb08df553 Use $(RM) in Makefiles instead of 'rm -f'
Signed-off-by: Emil Medve <Emilian.Medve@Freescale.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2007-07-14 23:31:01 -07:00
Matt McCutchen
54dadbdb29 Makefile: rebuild git.o on version change, clean up git$X flags
Commit 334d28ae factored out git.o as an intermediate stage between
git.c and git$X.  However:

- It left some no-longer-relevant flags in the rule for git$X.

- It failed to replace git$X with git.o in the list of files that
  record GIT_VERSION.  This broke incorporation of a changed
  GIT_VERSION into git$X because, when GIT_VERSION changes, git.o isn't
  remade and git$X is relinked from the git.o that still contains the
  old GIT_VERSION.

This patch removes the irrelevant flags and fixes incorporation of a
changed GIT_VERSION into git$X.

Signed-off-by: Matt McCutchen <hashproduct@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2007-07-09 23:39:59 -07:00
Linus Torvalds
36e5e70e0f Start deprecating "git-command" in favor of "git command"
I realize that a lot of people use the "git-xyzzy" format, and we have
various historical reasons for it, but I also think that most people have
long since started thinking of the git command as a single command with
various subcommands, and we've long had the documentation talk about it
that way.

Slowly migrating away from the git-xyzzy format would allow us to
eventually no longer install hundreds of binaries (even if most of them
are symlinks or hardlinks) in users $PATH, and the _original_ reasons for
it (implementation issues and bash completion) are really long long gone.

Using "git xyzzy" also has some fundamental advantages, like the ability
to specify things like paging ("git -p xyzzy") and making the whole notion
of aliases act like other git commands (which they already do, but they do
*not* have a "git-xyzzy" form!)

Anyway, while actually removing the "git-xyzzy" things is not practical
right now, we can certainly start slowly to deprecate it internally inside
git itself - in the shell scripts we use, and the test vectors.

This patch adds a "remove-dashes" makefile target, which does that. It
isn't particularly efficient or smart, but it *does* successfully rewrite
a lot of our shell scripts to use the "git xyzzy" form for all built-in
commands.

(For non-builtins, the "git xyzzy" format implies an extra execve(), so
this script leaves those alone).

So apply this patch, and then run

	make remove-dashes
	make test
	git commit -a

to generate a much larger patch that actually starts this transformation.

(The only half-way subtle thing about this is that it also fixes up
git-filter-branch.sh for the new world order by adding quoting around
the use of "git-commit-tree" as an argument. It doesn't need it in that
format, but when changed into "git commit-tree" it is no longer a single
word, and the quoting maintains the old behaviour).

NOTE! This does not yet mean that you can actually stop installing the
"git-xyzzy" binaries for the builtins. There are some remaining places
that want to use the old form, this just removes the most obvious ones
that can easily be done automatically.

Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2007-07-02 22:39:10 -07:00
Junio C Hamano
7425dcc95e Merge branch 'ns/stash'
* ns/stash:
  Documentation: quote {non-attributes} for asciidoc
  git-stash: don't complain when listing in a repo with no stash
  git-stash: fix "can't shift that many" with no arguments
  git-stash: fix "no arguments" case in documentation
  git-stash: require "save" to be explicit and update documentation
  Document git-stash
  Add git-stash script
2007-07-02 01:45:57 -07:00
Junio C Hamano
f36db54905 Merge branch 'js/rebase'
* js/rebase:
  Teach rebase -i about --preserve-merges
  rebase -i: provide reasonable reflog for the rebased branch
  rebase -i: several cleanups
  ignore git-rebase--interactive
  Teach rebase an interactive mode
  Move the pick_author code to git-sh-setup
2007-07-02 01:45:47 -07:00
しらいしななこ
f2c66ed196 Add git-stash script
When my boss has something to show me and I have to update, for some
reason I am always in the middle of doing something else, and git pull
command refuses to work in such a case.

I wrote this little script to save the changes I made, perform the
update, and then come back to where I was, but on top of the updated
commit.

This is how you would use the script:

  $ git stash
  $ git pull
  $ git stash apply

[jc: with a few fixlets from the list]

Signed-off-by: Nanako Shiraishi <nanako3@bluebottle.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2007-06-30 20:50:51 -07:00
Junio C Hamano
90c88a698e Merge branch 'maint'
* maint:
  Correct the name of NO_R_TO_GCC_LINKER in the comment describing it.
  git-remote: document -n
  repack: improve documentation on -a option
2007-06-30 11:17:19 -07:00
Matt Kraai
2064887742 Correct the name of NO_R_TO_GCC_LINKER in the comment describing it.
Signed-off-by: Matt Kraai <kraai@ftbfs.org>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2007-06-30 11:16:09 -07:00
Johannes Schindelin
1b1dce4bae Teach rebase an interactive mode
Don't you just hate the fact sometimes, that git-rebase just applies
the patches, without any possibility to edit them, or rearrange them?
With "--interactive", git-rebase now lets you edit the list of patches,
so that you can reorder, edit and delete patches.

Such a list will typically look like this:

	pick deadbee The oneline of this commit
	pick fa1afe1 The oneline of the next commit
	...

By replacing the command "pick" with the command "edit", you can amend
that patch and/or its commit message, and by replacing it with "squash"
you can tell rebase to fold that patch into the patch before that.

It is derived from the script sent to the list in
<Pine.LNX.4.63.0702252156190.22628@wbgn013.biozentrum.uni-wuerzburg.de>

Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2007-06-24 17:45:02 -07:00
Matthias Lederhofer
f58494bf82 make dist: include configure script in tarball
Signed-off-by: Matthias Lederhofer <matled@gmx.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2007-06-24 02:16:00 -07:00
Junio C Hamano
0f2890acd9 Merge branch 'js/filter'
* js/filter:
  filter-branch: subdirectory filter needs --full-history
  filter-branch: Simplify parent computation.
  Teach filter-branch about subdirectory filtering
  filter-branch: also don't fail in map() if a commit cannot be mapped
  filter-branch: Use rev-list arguments to specify revision ranges.
  filter-branch: fix behaviour of '-k'
  filter-branch: use $(($i+1)) instead of $((i+1))
  chmod +x git-filter-branch.sh
  filter-branch: prevent filters from reading from stdin
  t7003: make test repeatable
  Add git-filter-branch
2007-06-22 23:20:40 -07:00
Junio C Hamano
5bd148bfe8 Merge branch 'maint' to sync with GIT 1.5.2.2 2007-06-16 01:22:10 -07:00
Junio C Hamano
4c7100a9f4 Documentation: adjust to AsciiDoc 8
It turns out that the attribute definition we have had for a
long time to hide "^" character from AsciiDoc 7 was not honored
by AsciiDoc 8 even under "-a asciidoc7compatible" mode.  There is
a similar breakage with the "compatible" mode with + characters.

The double colon at the end of definition list term needs
to be attached to the term, without a whitespace.  After this
minimum fixups, AsciiDoc 8 (I used 8.2.1 on Debian) with
compatibility mode seems to produce reasonably good results.

Signed-off-by: Junio C Hamano <gitster@pobox.com>
2007-06-16 01:11:16 -07:00
Alex Riesen
fa0c87c344 Add a local implementation of hstrerror for the system which do not have it
The function converts the value of h_errno (last error of name
resolver library, see netdb.h).
One of systems which supposedly do not have the function is SunOS.
POSIX does not mandate its presence.

Signed-off-by: Alex Riesen <raa.lkml@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2007-06-15 22:48:34 -07:00
Junio C Hamano
334d28ae60 Makefile: allow generating git.o for debugging purposes
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2007-06-13 02:02:10 -07:00
Junio C Hamano
48dd1da8e1 Makefile: common-cmds.h depends on generate-cmdlist.sh script
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2007-06-13 02:02:10 -07:00
Johannes Sixt
d52fd42acd Remove trailing slash from $(template_dir).
All the other directory location variables do not have the trailing
slash.

Signed-off-by: Johannes Sixt <johannes.sixt@telecom.at>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2007-06-12 00:23:31 -07:00
Johannes Sixt
9354768ab7 Avoid double-slash in path names that depend on $(sharedir).
Recent git-gui has the ability to determine the location of its library
files relative to the --exec-dir. Its Makefile enables this capability
depending on the install paths that are specified. However, without this
fix there is an extra slash in a path specification, so that the Makefile
does not recognize the equivalence of two paths that it compares.

A side-effect is that all "standard" builds (which do not set $(sharedir)
explicitly) now exploit above mentioned gut-gui feature.

Another side-effect is that an ugly compiled-in double-slash in
$(template_dir) is avoided.

Signed-off-by: Johannes Sixt <johannes.sixt@telecom.at>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2007-06-12 00:23:31 -07:00
Linus Torvalds
e36cb1c16d Makefile: add an explicit rule for building assembly output
In the kernel we have a rule for *.c -> *.s files exactly because
it's nice to be able to easily say "ok, what does that generate".

Here's a patch to add such a rule to git too, in case anybody is
interested. It makes it much simpler to just do

	make sha1_file.s

and look at the compiler-generated output that way, rather than having to
fire up gdb on the resulting binary.

(Add -fverbose-asm or something if you want to, it can make the result
even more readable)

[jc: add *.s to .gitignore]

Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2007-06-10 15:15:17 -07:00
Johannes Sixt
f07dfbad29 Makefile: Remove git-merge-base from PROGRAMS.
git-merge-base is a builtin.

Signed-off-by: Johannes Sixt <johannes.sixt@telecom.at>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2007-06-06 13:19:16 -07:00
Matthias Lederhofer
d0f51a8b2a make clean should remove all the test programs too
Signed-off-by: Matthias Lederhofer <matled@gmx.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2007-06-06 00:28:24 -07:00
Johannes Schindelin
6f6826c52b Add git-filter-branch
This script is derived from Pasky's cg-admin-rewritehist.

In fact, it _is_ the same script, minimally adapted to work without cogito.
It _should_ be able to perform the same tasks, even if only relying on
core-git programs.

All the work is Pasky's, just the adaption is mine.

Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Hopefully-signed-off-by: Petr "cogito master" Baudis <pasky@suse.cz>
Signed-off-by: Junio C Hamano <junkio@cox.net>
2007-06-02 20:04:04 -07:00
Junio C Hamano
1a8b76912e Merge branches 'lh/submodules' and 'pb/am'
* lh/submodules:
  Add basic test-script for git-submodule
  Add git-submodule command

* pb/am:
  Remove git-applypatch
  git-applymbox: Remove command
2007-06-02 19:04:54 -07:00
Julian Phillips
5c5ba73b21 Makefile: Use generic rule to build test programs
Use a generic make rule to build all the test programs, rather than
specifically mentioning each one.

Signed-off-by: Julian Phillips <julian@quantumfyre.co.uk>
Signed-off-by: Junio C Hamano <junkio@cox.net>
2007-05-30 18:23:37 -07:00
Junio C Hamano
322bcd9a9a Merge branch 'db/remote'
* db/remote:
  Move refspec pattern matching to match_refs().
  Update local tracking refs when pushing
  Add handlers for fetch-side configuration of remotes.
  Move refspec parser from connect.c and cache.h to remote.{c,h}
  Move remote parsing into a library file out of builtin-push.
2007-05-29 01:24:20 -07:00
Nguyen Thai Ngoc Duy
59d10247e4 Makefile: Remove git-fsck and git-verify-pack from PROGRAMS
Those are builtins. Remove them from PROGRAMS variable

Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com>
Signed-off-by: Junio C Hamano <junkio@cox.net>
2007-05-28 20:00:45 -07:00
Lars Hjemli
70c7ac22de Add git-submodule command
This command can be used to initialize, update and inspect submodules. It
uses a .gitmodules file, readable by git-config, in the top level directory
of the 'superproject' to specify a mapping between submodule paths and
repository url.

Example .gitmodules layout:

[module "git"]
	url = git://git.kernel.org/pub/scm/git/git.git

With this entry in .gitmodules (and a commit reference in the index entry for
the path "git"), the command 'git submodule init' will clone the repository
at kernel.org into the directory "git".

Known issues
============
There is currently no way to override the url found in the .gitmodules file,
except by manually creating the subproject repository. The place to fix this
in the script has a rather long comment about a possible plan.

Funny paths will be quoted in the output from git-ls-files, but git-submodule
does not attempt to unquote (or even detect the presence of) such paths.

Signed-off-by: Lars Hjemli <hjemli@gmail.com>
Signed-off-by: Junio C Hamano <junkio@cox.net>
2007-05-26 20:24:07 -07:00
Junio C Hamano
59c8e2cb2a Remove git-applypatch
The previous one removed git-applymbox, which was the sole user
of this tool.

Signed-off-by: Junio C Hamano <junkio@cox.net>
2007-05-24 21:36:53 -07:00
Petr Baudis
d45cc6e267 git-applymbox: Remove command
I believe noone uses git-applymbox, and noone definitely should, since it
is supposed to be completely superseded and everything by its younger
cousin git-am. The only known person in the universe to use it was Linus
and he declared some time ago that he will try to use git-am instead in his
famous dotest script.

The trouble is that git-applymbox existence creates confusing UI. I'm a bit
like a recycled newbie to the git porcelain and *I* was confused by
git-applymbox primitiveness until I've realized a while later that I'm of
course using the wrong command.

Signed-off-by: Petr Baudis <pasky@suse.cz>
Signed-off-by: Junio C Hamano <junkio@cox.net>
2007-05-24 21:36:53 -07:00
Daniel Barkalow
5751f49010 Move remote parsing into a library file out of builtin-push.
The new parser is different from the one in builtin-push in two ways:
the default is to use the current branch's remote, if there is one,
before "origin"; and config is used in preference to remotes.

Signed-off-by: Daniel Barkalow <barkalow@iabervon.org>
Signed-off-by: Junio C Hamano <junkio@cox.net>
2007-05-20 21:32:56 -07:00
Junio C Hamano
64cab59159 apply: do not get confused by symlinks in the middle
HPA noticed that git-rebase fails when changes involve symlinks
in the middle of the hierarchy.  Consider:

 * The tree state before the patch is applied has arch/x86_64/boot
   as a symlink pointing at ../i386/boot/

 * The patch tries to remove arch/x86_64/boot symlink, and
   create bunch of files there: .gitignore, Makefile, etc.

git-apply tries to be careful while applying patches; it never
touches the working tree until it is convinced that the patch
would apply cleanly.  One of the check it does is that when it
knows a path is going to be created by the patch, it runs
lstat() on the path to make sure it does not exist.

This leads to a false alarm.  Because we do not touch the
working tree before all the check passes, when we try to make
sure that arch/x86_64/boot/.gitignore does not exist yet, we
haven't removed the arch/x86_64/boot symlink.  The lstat() check
ends up seeing arch/i386/boot/.gitignore through the
yet-to-be-removed symlink, and says "Hey, you already have a
file there, but what you fed me is a patch to create a new
file. I am not going to clobber what you have in the working
tree."

We have similar checks to see a file we are going to modify does
exist and match the preimage of the diff, which is done by
directly opening and reading the file.

For a file we are going to delete, we make sure that it does
exist and matches what is going to be removed (a removal patch
records the full preimage, so we check what you have in your
working tree matches it in full -- otherwise we would risk
losing your local changes), which again is done by directly
opening and reading the file.

These checks need to be adjusted so that they are not fooled by
symlinks in the middle.

 - To make sure something does not exist, first lstat().  If it
   does not exist, it does not, so be happy.  If it _does_, we
   might be getting fooled by a symlink in the middle, so break
   leading paths and see if there are symlinks involved.  When
   we are checking for a path a/b/c/d, if any of a, a/b, a/b/c
   is a symlink, then a/b/c/d does _NOT_ exist, for the purpose
   of our test.

   This would fix this particular case you saw, and would not
   add extra overhead in the usual case.

 - To make sure something already exists, first lstat().  If it
   does not exist, barf (up to this, we already do).  Even if it
   does seem to exist, we might be getting fooled by a symlink
   in the middle, so make sure leading paths are not symlinks.

   This would make the normal codepath much more expensive for
   deep trees, which is a bit worrisome.

This patch implements the first side of the check "making sure
it does not exist".  The latter "making sure it exists" check is
not done yet, so applying the patch in reverse would still
fail, but we have to start from somewhere.

Signed-off-by: Junio C Hamano <junkio@cox.net>
2007-05-11 22:26:08 -07:00