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2020-04-08mingw: do not treat `COM0` as a reserved file nameLibravatar Johannes Schindelin1-0/+2
In 4dc42c6c186 (mingw: refuse paths containing reserved names, 2019-12-21), we started disallowing file names that are reserved, e.g. `NUL`, `CONOUT$`, etc. This included `COM<n>` where `<n>` is a digit. Unfortunately, this includes `COM0` but only `COM1`, ..., `COM9` are reserved, according to the official documentation, `COM0` is mentioned in the "NT Namespaces" section but it is explicitly _omitted_ from the list of reserved names: https://docs.microsoft.com/en-us/windows/win32/fileio/naming-a-file#naming-conventions Tests corroborate this: it is totally possible to write a file called `com0.c` on Windows 10, but not `com1.c`. So let's tighten the code to disallow only the reserved `COM<n>` file names, but to allow `COM0` again. This fixes https://github.com/git-for-windows/git/issues/2470. Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-01-02Merge branch 'js/mingw-reserved-filenames'Libravatar Junio C Hamano1-2/+11
Forbid pathnames that the platform's filesystem cannot represent on MinGW. * js/mingw-reserved-filenames: mingw: refuse paths containing reserved names mingw: short-circuit the conversion of `/dev/null` to UTF-16
2019-12-21mingw: refuse paths containing reserved namesLibravatar Johannes Schindelin1-2/+11
There are a couple of reserved names that cannot be file names on Windows, such as `AUX`, `NUL`, etc. For an almost complete list, see https://docs.microsoft.com/en-us/windows/win32/fileio/naming-a-file If one would try to create a directory named `NUL`, it would actually "succeed", i.e. the call would return success, but nothing would be created. Worse, even adding a file extension to the reserved name does not make it a valid file name. To understand the rationale behind that behavior, see https://devblogs.microsoft.com/oldnewthing/20031022-00/?p=42073 Let's just disallow them all. Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2019-12-09Sync with Git 2.24.1Libravatar Junio C Hamano1-1/+31
2019-12-06Sync with 2.19.3Libravatar Johannes Schindelin1-1/+31
* maint-2.19: (34 commits) Git 2.19.3 Git 2.18.2 Git 2.17.3 Git 2.16.6 test-drop-caches: use `has_dos_drive_prefix()` Git 2.15.4 Git 2.14.6 mingw: handle `subst`-ed "DOS drives" mingw: refuse to access paths with trailing spaces or periods mingw: refuse to access paths with illegal characters unpack-trees: let merged_entry() pass through do_add_entry()'s errors quote-stress-test: offer to test quoting arguments for MSYS2 sh t6130/t9350: prepare for stringent Win32 path validation quote-stress-test: allow skipping some trials quote-stress-test: accept arguments to test via the command-line tests: add a helper to stress test argument quoting mingw: fix quoting of arguments Disallow dubiously-nested submodule git directories protect_ntfs: turn on NTFS protection by default path: also guard `.gitmodules` against NTFS Alternate Data Streams ...
2019-12-06Sync with 2.18.2Libravatar Johannes Schindelin1-1/+31
* maint-2.18: (33 commits) Git 2.18.2 Git 2.17.3 Git 2.16.6 test-drop-caches: use `has_dos_drive_prefix()` Git 2.15.4 Git 2.14.6 mingw: handle `subst`-ed "DOS drives" mingw: refuse to access paths with trailing spaces or periods mingw: refuse to access paths with illegal characters unpack-trees: let merged_entry() pass through do_add_entry()'s errors quote-stress-test: offer to test quoting arguments for MSYS2 sh t6130/t9350: prepare for stringent Win32 path validation quote-stress-test: allow skipping some trials quote-stress-test: accept arguments to test via the command-line tests: add a helper to stress test argument quoting mingw: fix quoting of arguments Disallow dubiously-nested submodule git directories protect_ntfs: turn on NTFS protection by default path: also guard `.gitmodules` against NTFS Alternate Data Streams is_ntfs_dotgit(): speed it up ...
2019-12-06Sync with 2.17.3Libravatar Johannes Schindelin1-1/+31
* maint-2.17: (32 commits) Git 2.17.3 Git 2.16.6 test-drop-caches: use `has_dos_drive_prefix()` Git 2.15.4 Git 2.14.6 mingw: handle `subst`-ed "DOS drives" mingw: refuse to access paths with trailing spaces or periods mingw: refuse to access paths with illegal characters unpack-trees: let merged_entry() pass through do_add_entry()'s errors quote-stress-test: offer to test quoting arguments for MSYS2 sh t6130/t9350: prepare for stringent Win32 path validation quote-stress-test: allow skipping some trials quote-stress-test: accept arguments to test via the command-line tests: add a helper to stress test argument quoting mingw: fix quoting of arguments Disallow dubiously-nested submodule git directories protect_ntfs: turn on NTFS protection by default path: also guard `.gitmodules` against NTFS Alternate Data Streams is_ntfs_dotgit(): speed it up mingw: disallow backslash characters in tree objects' file names ...
2019-12-05mingw: handle `subst`-ed "DOS drives"Libravatar Johannes Schindelin1-0/+9
Over a decade ago, in 25fe217b86c (Windows: Treat Windows style path names., 2008-03-05), Git was taught to handle absolute Windows paths, i.e. paths that start with a drive letter and a colon. Unbeknownst to us, while drive letters of physical drives are limited to letters of the English alphabet, there is a way to assign virtual drive letters to arbitrary directories, via the `subst` command, which is _not_ limited to English letters. It is therefore possible to have absolute Windows paths of the form `1:\what\the\hex.txt`. Even "better": pretty much arbitrary Unicode letters can also be used, e.g. `ä:\tschibät.sch`. While it can be sensibly argued that users who set up such funny drive letters really seek adverse consequences, the Windows Operating System is known to be a platform where many users are at the mercy of administrators who have their very own idea of what constitutes a reasonable setup. Therefore, let's just make sure that such funny paths are still considered absolute paths by Git, on Windows. In addition to Unicode characters, pretty much any character is a valid drive letter, as far as `subst` is concerned, even `:` and `"` or even a space character. While it is probably the opposite of smart to use them, let's safeguard `is_dos_drive_prefix()` against all of them. Note: `[::1]:repo` is a valid URL, but not a valid path on Windows. As `[` is now considered a valid drive letter, we need to be very careful to avoid misinterpreting such a string as valid local path in `url_is_local_not_ssh()`. To do that, we use the just-introduced function `is_valid_path()` (which will label the string as invalid file name because of the colon characters). This fixes CVE-2019-1351. Reported-by: Nicolas Joly <Nicolas.Joly@microsoft.com> Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
2019-12-05mingw: refuse to access paths with illegal charactersLibravatar Johannes Schindelin1-1/+3
Certain characters are not admissible in file names on Windows, even if Cygwin/MSYS2 (and therefore, Git for Windows' Bash) pretend that they are, e.g. `:`, `<`, `>`, etc Let's disallow those characters explicitly in Windows builds of Git. Note: just like trailing spaces or periods, it _is_ possible on Windows to create commits adding files with such illegal characters, as long as the operation leaves the worktree untouched. To allow for that, we continue to guard `is_valid_win32_path()` behind the config setting `core.protectNTFS`, so that users _can_ continue to do that, as long as they turn the protections off via that config setting. Among other problems, this prevents Git from trying to write to an "NTFS Alternate Data Stream" (which refers to metadata stored alongside a file, under a special name: "<filename>:<stream-name>"). This fix therefore also prevents an attack vector that was exploited in demonstrations of a number of recently-fixed security bugs. Further reading on illegal characters in Win32 filenames: https://docs.microsoft.com/en-us/windows/win32/fileio/naming-a-file Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
2019-12-05mingw: refuse to access paths with trailing spaces or periodsLibravatar Johannes Schindelin1-0/+14
When creating a directory on Windows whose path ends in a space or a period (or chains thereof), the Win32 API "helpfully" trims those. For example, `mkdir("abc ");` will return success, but actually create a directory called `abc` instead. This stems back to the DOS days, when all file names had exactly 8 characters plus exactly 3 characters for the file extension, and the only way to have shorter names was by padding with spaces. Sadly, this "helpful" behavior is a bit inconsistent: after a successful `mkdir("abc ");`, a `mkdir("abc /def")` will actually _fail_ (because the directory `abc ` does not actually exist). Even if it would work, we now have a serious problem because a Git repository could contain directories `abc` and `abc `, and on Windows, they would be "merged" unintentionally. As these paths are illegal on Windows, anyway, let's disallow any accesses to such paths on that Operating System. For practical reasons, this behavior is still guarded by the config setting `core.protectNTFS`: it is possible (and at least two regression tests make use of it) to create commits without involving the worktree. In such a scenario, it is of course possible -- even on Windows -- to create such file names. Among other consequences, this patch disallows submodules' paths to end in spaces on Windows (which would formerly have confused Git enough to try to write into incorrect paths, anyway). While this patch does not fix a vulnerability on its own, it prevents an attack vector that was exploited in demonstrations of a number of recently-fixed security bugs. The regression test added to `t/t7417-submodule-path-url.sh` reflects that attack vector. Note that we have to adjust the test case "prevent git~1 squatting on Windows" in `t/t7415-submodule-names.sh` because of a very subtle issue. It tries to clone two submodules whose names differ only in a trailing period character, and as a consequence their git directories differ in the same way. Previously, when Git tried to clone the second submodule, it thought that the git directory already existed (because on Windows, when you create a directory with the name `b.` it actually creates `b`), but with this patch, the first submodule's clone will fail because of the illegal name of the git directory. Therefore, when cloning the second submodule, Git will take a different code path: a fresh clone (without an existing git directory). Both code paths fail to clone the second submodule, both because the the corresponding worktree directory exists and is not empty, but the error messages are worded differently. Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
2019-12-05path: also guard `.gitmodules` against NTFS Alternate Data StreamsLibravatar Johannes Schindelin1-1/+6
We just safe-guarded `.git` against NTFS Alternate Data Stream-related attack vectors, and now it is time to do the same for `.gitmodules`. Note: In the added regression test, we refrain from verifying all kinds of variations between short names and NTFS Alternate Data Streams: as the new code disallows _all_ Alternate Data Streams of `.gitmodules`, it is enough to test one in order to know that all of them are guarded against. Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
2019-12-01Merge branch 'js/git-path-head-dot-lock-fix'Libravatar Junio C Hamano1-0/+2
"git rev-parse --git-path HEAD.lock" did not give the right path when run in a secondary worktree. * js/git-path-head-dot-lock-fix: git_path(): handle `.lock` files correctly t1400: wrap setup code in test case
2019-10-29git_path(): handle `.lock` files correctlyLibravatar Johannes Schindelin1-0/+2
Ever since worktrees were introduced, the `git_path()` function _really_ needed to be called e.g. to get at the path to `logs/HEAD` (`HEAD` is specific to the worktree, and therefore so is its reflog). However, the wrong path is returned for `logs/HEAD.lock`. This does not matter as long as the Git executable is doing the asking, as the path for that `logs/HEAD.lock` file is constructed from `git_path("logs/HEAD")` by appending the `.lock` suffix. However, Git GUI just learned to use `--git-path` instead of appending relative paths to what `git rev-parse --git-dir` returns (and as a consequence not only using the correct hooks directory, but also using the correct paths in worktrees other than the main one). While it does not seem as if Git GUI in particular is asking for `logs/HEAD.lock`, let's be safe rather than sorry. Side note: Git GUI _does_ ask for `index.lock`, but that is already resolved correctly, due to `update_common_dir()` preferring to leave unknown paths in the (worktree-specific) git directory. Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2019-10-23path.c: don't call the match function without value in trie_find()Libravatar SZEDER Gábor1-0/+2
'logs/refs' is not a working tree-specific path, but since commit b9317d55a3 (Make sure refs/rewritten/ is per-worktree, 2019-03-07) 'git rev-parse --git-path' has been returning a bogus path if a trailing '/' is present: $ git -C WT/ rev-parse --git-path logs/refs --git-path logs/refs/ /home/szeder/src/git/.git/logs/refs /home/szeder/src/git/.git/worktrees/WT/logs/refs/ We use a trie data structure to efficiently decide whether a path belongs to the common dir or is working tree-specific. As it happens b9317d55a3 triggered a bug that is as old as the trie implementation itself, added in 4e09cf2acf (path: optimize common dir checking, 2015-08-31). - According to the comment describing trie_find(), it should only call the given match function 'fn' for a "/-or-\0-terminated prefix of the key for which the trie contains a value". This is not true: there are three places where trie_find() calls the match function, but one of them is missing the check for value's existence. - b9317d55a3 added two new keys to the trie: 'logs/refs/rewritten' and 'logs/refs/worktree', next to the already existing 'logs/refs/bisect'. This resulted in a trie node with the path 'logs/refs/', which didn't exist before, and which doesn't have a value attached. A query for 'logs/refs/' finds this node and then hits that one callsite of the match function which doesn't check for the value's existence, and thus invokes the match function with NULL as value. - When the match function check_common() is invoked with a NULL value, it returns 0, which indicates that the queried path doesn't belong to the common directory, ultimately resulting the bogus path shown above. Add the missing condition to trie_find() so it will never invoke the match function with a non-existing value. check_common() will then no longer have to check that it got a non-NULL value, so remove that condition. I believe that there are no other paths that could cause similar bogus output. AFAICT the only other key resulting in the match function being called with a NULL value is 'co' (because of the keys 'common' and 'config'). However, as they are not in a directory that belongs to the common directory the resulting working tree-specific path is expected. Signed-off-by: SZEDER Gábor <szeder.dev@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-10-07Add a place for (not) sharing stuff between worktreesLibravatar Nguyễn Thái Ngọc Duy1-0/+2
When multiple worktrees are used, we need rules to determine if something belongs to one worktree or all of them. Instead of keeping adding rules when new stuff comes (*), have a generic rule: - Inside $GIT_DIR, which is per-worktree by default, add $GIT_DIR/common which is always shared. New features that want to share stuff should put stuff under this directory. - Inside refs/, which is shared by default except refs/bisect, add refs/worktree/ which is per-worktree. We may eventually move refs/bisect to this new location and remove the exception in refs code. (*) And it may also include stuff from external commands which will have no way to modify common/per-worktree rules. Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-08-14submodule: add more exhaustive up-path testingLibravatar Ævar Arnfjörð Bjarmason1-0/+13
The tests added in 63e95beb08 ("submodule: port resolve_relative_url from shell to C", 2016-04-15) didn't do a good job of testing various up-path invocations where the up-path would bring us beyond even the URL in question without emitting an error. These results look nonsensical, but it's worth exhaustively testing them before fixing any of this code, so we can see which of these cases were changed. Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com> Acked-by: Stefan Beller <sbeller@google.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-05-29Sync with Git 2.17.1Libravatar Junio C Hamano1-0/+86
* maint: (25 commits) Git 2.17.1 Git 2.16.4 Git 2.15.2 Git 2.14.4 Git 2.13.7 fsck: complain when .gitmodules is a symlink index-pack: check .gitmodules files with --strict unpack-objects: call fsck_finish() after fscking objects fsck: call fsck_finish() after fscking objects fsck: check .gitmodules content fsck: handle promisor objects in .gitmodules check fsck: detect gitmodules files fsck: actually fsck blob data fsck: simplify ".git" check index-pack: make fsck error message more specific verify_path: disallow symlinks in .gitmodules update-index: stat updated files earlier verify_dotfile: mention case-insensitivity in comment verify_path: drop clever fallthrough skip_prefix: add case-insensitive variant ...
2018-05-21is_{hfs,ntfs}_dotgitmodules: add testsLibravatar Johannes Schindelin1-0/+86
This tests primarily for NTFS issues, but also adds one example of an HFS+ issue. Thanks go to Congyi Wu for coming up with the list of examples where NTFS would possibly equate the filename with `.gitmodules`. Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de> Signed-off-by: Jeff King <peff@peff.net>
2018-03-27t/helper: merge test-path-utils into test-toolLibravatar Nguyễn Thái Ngọc Duy1-30/+30
Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2017-07-05cygwin: allow pushing to UNC pathsLibravatar Torsten Bögershausen1-0/+2
cygwin can use an UNC path like //server/share/repo $ cd //server/share/dir $ mkdir test $ cd test $ git init --bare However, when we try to push from a local Git repository to this repo, there is a problem: Git converts the leading "//" into a single "/". As cygwin handles an UNC path so well, Git can support them better: - Introduce cygwin_offset_1st_component() which keeps the leading "//", similar to what Git for Windows does. - Move CYGWIN out of the POSIX in the tests for path normalization in t0060 Signed-off-by: Torsten Bögershausen <tboegi@web.de> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2016-10-25t0060: sidestep surprising path mangling results on WindowsLibravatar Johannes Sixt1-13/+14
When an MSYS program (such as the bash that drives the test suite) invokes git on Windows, absolute Unix style paths are transformed into Windows native absolute paths (drive letter form). However, this transformation also includes some simplifications that are not just straight-forward textual substitutions: - When the path ends in "/.", then the dot is stripped, but not the directory separator. - When the path contains "..", then it is optimized away if possible, e.g., "/c/dir/foo/../bar" becomes "c:/dir/bar". These additional transformations violate the assumptions of some submodule path tests. We can avoid them when the input is already a Windows native path, because then MSYS leaves the path unmolested. Convert the uses of $PWD to $(pwd); the latter returns a native Windows path. Signed-off-by: Johannes Sixt <j6t@kdbg.org> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2016-10-10submodule: ignore trailing slash in relative urlLibravatar Stefan Beller1-0/+1
This is similar to the previous patch, though no user reported a bug and I could not find a regressive behavior. However it is a good thing to be strict on the output and for that we always omit a trailing slash. Signed-off-by: Stefan Beller <sbeller@google.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2016-10-10submodule: ignore trailing slash on superproject URLLibravatar Stefan Beller1-0/+1
Before 63e95beb0 (2016-04-15, submodule: port resolve_relative_url from shell to C), it did not matter if the superprojects URL had a trailing slash or not. It was just chopped off as one of the first steps (The "remoteurl=${remoteurl%/}" near the beginning of resolve_relative_url(), which was removed in said commit). When porting this to the C version, an off-by-one error was introduced and we did not check the actual last character to be a slash, but the NULL delimiter. Reintroduce the behavior from before 63e95beb0, to ignore the trailing slash. Reported-by: <venv21@gmail.com> Helped-by: Dennis Kaarsemaker <dennis@kaarsemaker.net> Signed-off-by: Stefan Beller <sbeller@google.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2016-04-16submodule: port resolve_relative_url from shell to CLibravatar Stefan Beller1-0/+46
Later on we want to automatically call `git submodule init` from other commands, such that the users don't have to initialize the submodule themselves. As these other commands are written in C already, we'd need the init functionality in C, too. The `resolve_relative_url` function is a large part of that init functionality, so start by porting this function to C. To create the tests in t0060, the function `resolve_relative_url` was temporarily enhanced to write all inputs and output to disk when running the test suite. The added tests in this patch are a small selection thereof. Signed-off-by: Stefan Beller <sbeller@google.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2016-02-17Merge branch 'js/mingw-tests'Libravatar Junio C Hamano1-0/+9
Test scripts have been updated to remove assumptions that are not portable between Git for POSIX and Git for Windows, or to skip ones with expectations that are not satisfiable on Git for Windows. * js/mingw-tests: (21 commits) gitignore: ignore generated test-fake-ssh executable mingw: do not bother to test funny file names mingw: skip a test in t9130 that cannot pass on Windows mingw: handle the missing POSIXPERM prereq in t9124 mingw: avoid illegal filename in t9118 mingw: mark t9100's test cases with appropriate prereqs t0008: avoid absolute path mingw: work around pwd issues in the tests mingw: fix t9700's assumption about directory separators mingw: skip test in t1508 that fails due to path conversion tests: turn off git-daemon tests if FIFOs are not available mingw: disable mkfifo-based tests mingw: accomodate t0060-path-utils for MSYS2 mingw: fix t5601-clone.sh mingw: let lstat() fail with errno == ENOTDIR when appropriate mingw: try to delete target directory before renaming mingw: prepare the TMPDIR environment variable for shell scripts mingw: factor out Windows specific environment setup Git.pm: stop assuming that absolute paths start with a slash mingw: do not trust MSYS2's MinGW gettext.sh ...
2016-02-03Merge branch 'js/dirname-basename'Libravatar Junio C Hamano1-0/+3
dirname() emulation has been added, as Msys2 lacks it. * js/dirname-basename: mingw: avoid linking to the C library's isalpha() t0060: loosen overly strict expectations t0060: verify that basename() and dirname() work as expected compat/basename.c: provide a dirname() compatibility function compat/basename: make basename() conform to POSIX Refactor skipping DOS drive prefixes
2016-01-27mingw: accomodate t0060-path-utils for MSYS2Libravatar Johannes Schindelin1-0/+9
On Windows, there are no POSIX paths, only Windows ones (an absolute Windows path looks like "C:\Program Files\Git\ReleaseNotes.html", under most circumstances, forward slashes are also allowed and synonymous to backslashes). So when a POSIX shell (such as MSYS2's Bash, which is used by Git for Windows to execute all those shell scripts that are part of Git) passes a POSIX path to test-path-utils.exe (which is not POSIX-aware), the path is translated into a Windows path. For example, /etc/profile becomes C:/Program Files/Git/etc/profile. This path translation poses a problem when passing the root directory as parameter to test-path-utils.exe, as it is not well defined whether the translated root directory should end in a slash or not. MSys1 stripped the trailing slash, but MSYS2 does not. Originally, the Git for Windows project patched MSYS2's runtime to accomodate Git's regression test, but we really should do it the other way round. To work with both of MSys1's and MSYS2's behaviors, we simply test what the current system does in the beginning of t0060-path-utils.sh and then adjust the expected longest ancestor length accordingly. It looks quite a bit tricky what we actually do in this patch: first, we adjust the expected length for the trailing slash we did not originally expect (subtracting one). So far, so good. But now comes the part where things work in a surprising way: when the expected length was 0, the prefix to match is the root directory. If the root directory is converted into a path with a trailing slash, however, we know that the logic in longest_ancestor_length() cannot match: to avoid partial matches of the last directory component, it verifies that the character after the matching prefix is a slash (but because the slash was part of the matching prefix, the next character cannot be a slash). So the return value is -1. Alas, this is exactly what the expected length is after subtracting the value of $rootslash! So we skip adding the $rootoff value in that case (and only in that case). Directories other than the root directory are handled fine (as they are specified without a trailing slash, something not possible for the root directory, and MSYS2 converts them into Windows paths that also lack trailing slashes), therefore we do not need any more special handling. Thanks to Ray Donnelly for his patient help with this issue. Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2016-01-12t0060: verify that basename() and dirname() work as expectedLibravatar Johannes Schindelin1-0/+3
Unfortunately, some libgen implementations yield outcomes different from what Git expects. For example, mingw-w64-crt provides a basename() function, that shortens `path0/` to `path`! So let's verify that the basename() and dirname() functions we use conform to what Git expects. Derived-from-code-by: Ramsay Jones <ramsay@ramsayjones.plus.com> Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2015-09-01refs: make refs/bisect/* per-worktreeLibravatar David Turner1-0/+5
We need the place we stick refs for bisects in progress to not be shared between worktrees. So we make the refs/bisect/ hierarchy per-worktree. The is_per_worktree_ref function and associated docs learn that refs/bisect/ is per-worktree, as does the git_path code in path.c The ref-packing functions learn that per-worktree refs should not be packed (since packed-refs is common rather than per-worktree). Since refs/bisect is per-worktree, logs/refs/bisect should be too. Signed-off-by: David Turner <dturner@twopensource.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2015-09-01path: optimize common dir checkingLibravatar David Turner1-0/+1
Instead of a linear search over common_list to check whether a path is common, use a trie. The trie search operates on path prefixes, and handles excludes. Signed-off-by: David Turner <dturner@twopensource.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2014-12-01git_path(): keep "info/sparse-checkout" per work-treeLibravatar Nguyễn Thái Ngọc Duy1-0/+1
Currently git_path("info/sparse-checkout") resolves to $GIT_COMMON_DIR/info/sparse-checkout in multiple worktree mode. It makes more sense for the sparse checkout patterns to be per worktree, so you can have multiple checkouts with different parts of the tree. With this, "git checkout --to <new>" on a sparse checkout will create <new> as a full checkout. Which is expected, it's how a new checkout is made. The user can reshape the worktree afterwards. Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2014-12-01$GIT_COMMON_DIR: a new environment variableLibravatar Nguyễn Thái Ngọc Duy1-0/+16
This variable is intended to support multiple working directories attached to a repository. Such a repository may have a main working directory, created by either "git init" or "git clone" and one or more linked working directories. These working directories and the main repository share the same repository directory. In linked working directories, $GIT_COMMON_DIR must be defined to point to the real repository directory and $GIT_DIR points to an unused subdirectory inside $GIT_COMMON_DIR. File locations inside the repository are reorganized from the linked worktree view point: - worktree-specific such as HEAD, logs/HEAD, index, other top-level refs and unrecognized files are from $GIT_DIR. - the rest like objects, refs, info, hooks, packed-refs, shallow... are from $GIT_COMMON_DIR (except info/sparse-checkout, but that's a separate patch) Scripts are supposed to retrieve paths in $GIT_DIR with "git rev-parse --git-path", which will take care of "$GIT_DIR vs $GIT_COMMON_DIR" business. The redirection is done by git_path(), git_pathdup() and strbuf_git_path(). The selected list of paths goes to $GIT_COMMON_DIR, not the other way around in case a developer adds a new worktree-specific file and it's accidentally promoted to be shared across repositories (this includes unknown files added by third party commands) The list of known files that belong to $GIT_DIR are: ADD_EDIT.patch BISECT_ANCESTORS_OK BISECT_EXPECTED_REV BISECT_LOG BISECT_NAMES CHERRY_PICK_HEAD COMMIT_MSG FETCH_HEAD HEAD MERGE_HEAD MERGE_MODE MERGE_RR NOTES_EDITMSG NOTES_MERGE_WORKTREE ORIG_HEAD REVERT_HEAD SQUASH_MSG TAG_EDITMSG fast_import_crash_* logs/HEAD next-index-* rebase-apply rebase-merge rsync-refs-* sequencer/* shallow_* Path mapping is NOT done for git_path_submodule(). Multi-checkouts are not supported as submodules. Helped-by: Jens Lehmann <Jens.Lehmann@web.de> Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2014-12-01git_path(): be aware of file relocation in $GIT_DIRLibravatar Nguyễn Thái Ngọc Duy1-0/+19
We allow the user to relocate certain paths out of $GIT_DIR via environment variables, e.g. GIT_OBJECT_DIRECTORY, GIT_INDEX_FILE and GIT_GRAFT_FILE. Callers are not supposed to use git_path() or git_pathdup() to get those paths. Instead they must use get_object_directory(), get_index_file() and get_graft_file() respectively. This is inconvenient and could be missed in review (for example, there's git_path("objects/info/alternates") somewhere in sha1_file.c). This patch makes git_path() and git_pathdup() understand those environment variables. So if you set GIT_OBJECT_DIRECTORY to /foo/bar, git_path("objects/abc") should return /foo/bar/abc. The same is done for the two remaining env variables. "git rev-parse --git-path" is the wrapper for script use. This patch kinda reverts a0279e1 (setup_git_env: use git_pathdup instead of xmalloc + sprintf - 2014-06-19) because using git_pathdup here would result in infinite recursion: setup_git_env() -> git_pathdup("objects") -> .. -> adjust_git_path() -> get_object_directory() -> oops, git_object_directory is NOT set yet -> setup_git_env() I wanted to make git_pathdup_literal() that skips adjust_git_path(). But that won't work because later on when $GIT_COMMON_DIR is introduced, git_pathdup_literal("objects") needs adjust_git_path() to replace $GIT_DIR with $GIT_COMMON_DIR. Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2014-02-04setup: don't dereference in-tree symlinks for absolute pathsLibravatar Martin Erik Werner1-1/+1
The prefix_path_gently() function currently applies real_path to everything if given an absolute path, dereferencing symlinks both outside and inside the work tree. This causes most high-level functions to misbehave when acting on symlinks given via absolute paths. For example $ git add /dir/repo/symlink attempts to add the target of the symlink rather than the symlink itself, which is usually not what the user intends to do. In order to manipulate symlinks in the work tree using absolute paths, symlinks should only be dereferenced outside the work tree. Modify the prefix_path_gently() to first normalize the path in order to make sure path levels are separated by '/', then pass the result to 'abspath_part_inside_repo' to find the part inside the work tree (without dereferencing any symlinks inside the work tree). For absolute paths, prefix_path_gently() did not, nor does now do, any actual prefixing, hence the result from abspath_part_in_repo() is returned as-is. Fixes t0060-82 and t3004-5. Signed-off-by: Martin Erik Werner <martinerikwerner@gmail.com> Reviewed-by: Duy Nguyen <pclouds@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2014-02-04t0060: add tests for prefix_path when path begins with work treeLibravatar Martin Erik Werner1-0/+10
One edge-case that isn't currently checked in the tests is the beginning of the path matching the work tree, despite the target not actually being the work tree, for example: path = /dir/repoa work_tree = /dir/repo should fail since the path is outside the repo. However, if /dir/repoa is in fact a symlink that points to /dir/repo, it should instead succeed. Add two tests covering these cases, since they might be potential regression points. Signed-off-by: Martin Erik Werner <martinerikwerner@gmail.com> Reviewed-by: Duy Nguyen <pclouds@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2014-02-04t0060: add test for prefix_path when path == work treeLibravatar Martin Erik Werner1-0/+6
The current behaviour of prefix_path is to return an empty string if prefixing and absolute path that only contains exactly the work tree. This behaviour is a potential regression point. Signed-off-by: Martin Erik Werner <martinerikwerner@gmail.com> Reviewed-by: Duy Nguyen <pclouds@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2014-02-04t0060: add test for prefix_path on symlinks via absolute pathsLibravatar Martin Erik Werner1-0/+5
When symlinks in the working tree are manipulated using the absolute path, git dereferences them, and tries to manipulate the link target instead. This applies to most high-level commands but prefix_path is the common denominator for all of them. Add a known-breakage tests using the prefix_path function, which currently uses real_path, causing the dereference. Signed-off-by: Martin Erik Werner <martinerikwerner@gmail.com> Reviewed-by: Duy Nguyen <pclouds@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2013-10-28Merge branch 'jx/relative-path-regression-fix'Libravatar Junio C Hamano1-28/+32
* jx/relative-path-regression-fix: Use simpler relative_path when set_git_dir relative_path should honor dos-drive-prefix test: use unambigous leading path (/foo) for MSYS
2013-10-14path-utils test: rename mingw_path function to print_pathLibravatar Sebastian Schuberth1-2/+2
mingw_path was introduced in abd4284 to output a mangled path as it is passed as an argument to main(). But the name is misleading because mangling does not come from MinGW, but from MSYS [1]. As abd4284 does not introduce any MSYS or MinGW specific code but just prints out argv[2] as it is passed to main(), give the function the more generic and less confusing name "print_path". [1] http://www.mingw.org/wiki/Posix_path_conversion Signed-off-by: Sebastian Schuberth <sschuberth@gmail.com> Signed-off-by: Jonathan Nieder <jrnieder@gmail.com>
2013-10-14relative_path should honor dos-drive-prefixLibravatar Jiang Xin1-0/+4
Tvangeste found that the "relative_path" function could not work properly on Windows if "in" and "prefix" have DOS drive prefix (such as "C:/windows"). ($gmane/234434) E.g., When execute: test-path-utils relative_path "C:/a/b" "D:/x/y", should return "C:/a/b", but returns "../../C:/a/b", which is wrong. So make relative_path honor DOS drive prefix, and add test cases for it in t0060. Reported-by: Tvangeste <i.4m.l33t@yandex.ru> Helped-by: Johannes Sixt <j6t@kdbg.org> Signed-off-by: Jiang Xin <worldhello.net@gmail.com> Signed-off-by: Jonathan Nieder <jrnieder@gmail.com>
2013-10-14test: use unambigous leading path (/foo) for MSYSLibravatar Jiang Xin1-28/+28
In test cases for relative_path, path with one leading character (such as /a, /x) may be recogonized as "a:/" or "x:/" if there is such DOS drive on MSYS platform. Use an umambigous leading path "/foo" instead. Also change two leading slashes (//) to three leading slashes (///), otherwize it will be recognized as UNC name on MSYS platform. Signed-off-by: Jiang Xin <worldhello.net@gmail.com> Acked-by: Sebastian Schuberth <sschuberth@gmail.com> Signed-off-by: Jonathan Nieder <jrnieder@gmail.com>
2013-06-26test: run testcases with POSIX absolute paths on WindowsLibravatar Jiang Xin1-21/+23
Some test cases are skipped on Windows by marking with POSIX prereq. This is because arguments look like absolute paths (such as /a/b) for regular Windows programs (*.exe executables, no bash scripts) are changed to Windows paths (like C:/msysgit/a/b). There is no cygpath nor equivalent on msysGit, but it is easy to write one. New subcommand "mingw_path" is added in test-path-utils, so that we can get the expected absolute paths on Windows. E.g. COMMAND LINE Linux output Windows output ================================== ============ =============== test-path-utils mingw_path / / C:/msysgit test-path-utils mingw_path /a/b/ /a/b/ C:/msysgit/a/b/ With this utility, most skipped test cases in t0060 can be turned on to be tested correctly on Windows. Signed-off-by: Jiang Xin <worldhello.net@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2013-06-26path.c: refactor relative_path(), not only strip prefixLibravatar Jiang Xin1-21/+18
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>
2013-06-26test: add test cases for relative_pathLibravatar Jiang Xin1-0/+37
Add subcommand "relative_path" in test-path-utils, and add test cases in t0060. Johannes tested an earlier version of this patch on Windows, and found that some relative_path tests should be skipped on Windows. This is because the bash on Windows rewrites arguments of regular Windows programs, such as git and the test helpers, if the arguments look like absolute POSIX paths. As a consequence, the actual tests performed are not what the tests scripts expect. The tests that need *not* be skipped are those where the two paths passed to 'test-path-utils relative_path' have the same prefix and the result is expected to be a relative path. This is because the rewriting changes "/a/b" to "D:/Src/MSysGit/a/b", and when both inputs are extended the same way, this just cancels out in the relative path computation. Signed-off-by: Jiang Xin <worldhello.net@gmail.com> Helped-by: Johannes Sixt <j6t@kdbg.org> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2012-10-29longest_ancestor_length(): require prefix list entries to be normalizedLibravatar Michael Haggerty1-28/+13
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>
2012-09-10t0060: split absolute path test in two to exercise some of it on WindowsLibravatar Johannes Sixt1-2/+6
Only the first half of the test works only on POSIX, the second half passes on Windows as well. A later test "real path removes other extra slashes" looks very similar, but it does not make sense to split it in the same way: When two slashes are prepended in front of an absolute DOS-style path on Windows, the meaning of the path is changed (//server/share style), so that the test cannot pass on Windows. Signed-off-by: Johannes Sixt <j6t@kdbg.org> Acked-by: Michael Haggerty <mhagger@alum.mit.edu> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2012-09-06t0060: verify that real_path() removes extra slashesLibravatar Michael Haggerty1-0/+18
Adjusted for Windows by: Johannes Sixt <j6t@kdbg.org> Signed-off-by: Michael Haggerty <mhagger@alum.mit.edu> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2012-09-06real_path(): properly handle nonexistent top-level pathsLibravatar Michael Haggerty1-1/+1
The change has two points: 1. Do not strip off a leading slash, because that erroneously turns an absolute path into a relative path. 2. Do not remove slashes from groups of multiple slashes; instead let chdir() handle them. It could be, for example, that it wants to leave leading double-slashes alone. Signed-off-by: Michael Haggerty <mhagger@alum.mit.edu> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2012-09-06t0060: verify that real_path() works correctly with absolute pathsLibravatar Michael Haggerty1-1/+11
There is currently a bug: if passed an absolute top-level path that doesn't exist (e.g., "/foo") it incorrectly interprets the path as a relative path (e.g., returns "$(pwd)/foo"). So mark the test as failing. These tests are skipped on Windows because test-path-utils operates on a DOS-style absolute path even if a POSIX style absolute path is passed as argument. Adjusted for Windows by: Johannes Sixt <j6t@kdbg.org> Signed-off-by: Michael Haggerty <mhagger@alum.mit.edu> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2012-09-06real_path(): reject the empty stringLibravatar Michael Haggerty1-1/+1
Signed-off-by: Michael Haggerty <mhagger@alum.mit.edu> Signed-off-by: Junio C Hamano <gitster@pobox.com>