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2014-03-21t0001: drop subshells just for "cd"Libravatar Jeff King1-47/+9
Many tests do something like: ( mkdir foo && cd foo && git init ) You can do the same these days with "git init foo", which makes the tests shorter and simpler to read. Signed-off-by: Jeff King <peff@peff.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2014-03-21t0001: drop useless subshellsLibravatar Jeff King1-39/+22
Many tests use subshells, but don't actually change the shell environment. They were probably cargo-culted from earlier tests which did need subshells. Drop the useless ones. Signed-off-by: Jeff King <peff@peff.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2014-03-21t0001: use test_must_failLibravatar Jeff King1-27/+11
We've hand-rolled several "if" statements looking for failures. We can use test_must_fail here, which is shorter and more robust. Note that we modify the commands slightly (to use "git init foo" rather than "cd foo && git init") to avoid dealing with a subshell, but this should not affect the outcome. Signed-off-by: Jeff King <peff@peff.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2014-03-21t0001: use test_config_globalLibravatar Jeff King1-7/+4
We hand-set several config options using : git config -f $HOME/.gitconfig ... Instead, we can use "test_config_global". Not only is this more readable, but it cleans up for us so that subsequent tests aren't polluted by our settings. Signed-off-by: Jeff King <peff@peff.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2014-03-21t0001: use test_path_is_*Libravatar Jeff King1-18/+18
t0001 predates the test_path_is_* helpers, and uses "test -f" and "test -d" directly. Using the helpers provides better debugging output, and are a little more robust. As opposed to "! test -d", test_path_is_missing will actually makes sure the path does not exist at all. Signed-off-by: Jeff King <peff@peff.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2014-03-21t0001: make symlink reinit test more carefulLibravatar Jeff King1-2/+2
In the final test of t0001, we have a repo whose .git is a symlink to a directory "here", and we use "--separate-git-dir" to migrate that to a .git file pointing to a different directory. We check that the data is migrated to the new directory and that .git looks like a git-file. We also check that "here" is not a directory, which is slightly misleading. It should not be a directory, but neither should it be gone. It is the actual resting place of the git-file, and .git remains a symlink to it. Let's check that more explicitly, both to make our test more robust, and to make further cleanups in this area more obvious. Signed-off-by: Jeff King <peff@peff.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2014-03-21t: prefer "git config --file" to GIT_CONFIGLibravatar Jeff King5-18/+17
Doing: GIT_CONFIG=foo git config ... is equivalent to: git config --file=foo ... The latter is easier to read and slightly less error-prone, because of issues with one-shot variables and shell functions (e.g., you cannot use the former with test_must_fail). Note that we explicitly leave one case in t1300 which checks the same operation on both GIT_CONFIG and "git config --file". They are equivalent in the code these days, but this will make sure it remains so. Signed-off-by: Jeff King <peff@peff.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2014-03-21t: prefer "git config --file" to GIT_CONFIG with test_must_failLibravatar Jeff King1-4/+4
This lets us get rid of an extra "env" invocation in the middle, and is slightly more readable. Signed-off-by: Jeff King <peff@peff.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2014-03-21t: stop using GIT_CONFIG to cross repo boundariesLibravatar Jeff King2-5/+5
Some tests want to check or set config in another repository. E.g., t1000 creates repositories and makes sure that their core.bare and core.worktree settings are what we expect. We can do this with: GIT_CONFIG=$repo/.git/config git config ... but it better shows the intent to just enter the repository and let "git config" do the normal lookups: (cd $repo && git config ...) In theory, this would cause us to use an extra subshell, but in all such cases, we are actually already in a subshell. Signed-off-by: Jeff King <peff@peff.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2014-03-21t: drop useless sane_unset GIT_* callsLibravatar Jeff King3-17/+0
Several test scripts manually unset GIT_CONFIG and other GIT_* variables. These are generally taken care of for us by test-lib.sh already. Unsetting these is not only useless, but can be confusing to a reader, who may wonder why some tests in a script unset them and others do not (t0001 is particularly guilty of this inconsistency, probably because many of its tests predate the test-lib.sh environment-cleansing). Note that we cannot always get rid of such unsetting. For example, t9130 can drop the GIT_CONFIG unset, but not the GIT_DIR one, because lib-git-svn.sh sets the latter. And in t1000, we unset GIT_TEMPLATE_DIR, which is explicitly initialized by test-lib.sh. Signed-off-by: Jeff King <peff@peff.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2014-03-21t/test-lib: drop redundant unset of GIT_CONFIGLibravatar Jeff King1-1/+0
This is already handled by the mass GIT_* unsetting added by 95a1d12 (tests: scrub environment of GIT_* variables, 2011-03-15). Signed-off-by: Jeff King <peff@peff.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2014-03-21t/Makefile: stop setting GIT_CONFIGLibravatar Jeff King1-2/+2
Once upon a time, the setting of GIT_CONFIG in the environment could affect how tests ran. Commit 9c3796f (Fix setting config variables with an alternative GIT_CONFIG, 2006-06-20) unconditionally set GIT_CONFIG in the Makefile when running tests to give us a known starting point. This is insufficient for running the tests outside of the Makefile, however, and 8565d2d (Make tests independent of global config files, 2007-02-15) later set GIT_CONFIG directly in test-lib.sh. At that point the Makefile setting was redundant, but we never removed it. Let's do so now. Signed-off-by: Jeff King <peff@peff.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2014-03-19tests: use "env" to run commands with temporary env-var settingsLibravatar David Tran12-152/+42
Ordinarily, we would say "VAR=VAL command" to execute a tested command with environment variable(s) set only for that command. This however does not work if 'command' is a shell function (most notably 'test_must_fail'); the result of the assignment is retained and affects later commands. To avoid this, we used to assign and export environment variables and run such a test in a subshell, like so: ( VAR=VAL && export VAR && test_must_fail git command to be tested ) But with "env" utility, we should be able to say: test_must_fail env VAR=VAL git command to be tested which is much shorter and easier to read. Signed-off-by: David Tran <unsignedzero@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2014-02-07Merge branch 'aj/ada-diff-word-pattern'Libravatar Junio C Hamano1-1/+1
* aj/ada-diff-word-pattern: userdiff: update Ada patterns
2014-02-05userdiff: update Ada patternsLibravatar Adrian Johnson1-1/+1
- Allow extra space in "is new" and "is separate" - Fix bug in word regex for numbers Signed-off-by: Adrian Johnson <ajohnson@redneon.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2014-01-31Merge branch 'jn/pager-lv-default-env'Libravatar Junio C Hamano1-1/+1
A finishing touch to its test. * jn/pager-lv-default-env: pager test: make fake pager consume all its input
2014-01-31pager test: make fake pager consume all its inputLibravatar Jonathan Nieder1-1/+1
Otherwise there is a race: if 'git log' finishes writing before the pager terminates and closes the pipe, all is well, and if the pager finishes quickly enough then 'git log' terminates with SIGPIPE. died of signal 13 at /build/buildd/git-1.9~rc1/t/test-terminal.perl line 33. not ok 6 - LESS and LV envvars are set for pagination Noticed on Ubuntu PPA builders, where the race was lost about half the time. Compare v1.7.0.2~6^2 (tests: Fix race condition in t7006-pager, 2010-02-22). Reported-by: Anders Kaseorg <andersk@MIT.EDU> Signed-off-by: Jonathan Nieder <jrnieder@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2014-01-27Merge branch 'as/tree-walk-fix-aggressive-short-cut'Libravatar Junio C Hamano1-0/+13
* as/tree-walk-fix-aggressive-short-cut: tree_entry_interesting: match against all pathspecs
2014-01-27Merge branch 'jk/test-fixes'Libravatar Junio C Hamano2-1/+2
* jk/test-fixes: t7700: do not use "touch" unnecessarily t7501: fix "empty commit" test with NO_PERL
2014-01-27Merge branch 'nd/negative-pathspec'Libravatar Junio C Hamano1-0/+17
* nd/negative-pathspec: tree-walk.c: ignore trailing slash on submodule in tree_entry_interesting()
2014-01-27Merge branch 'pw/git-p4'Libravatar Junio C Hamano8-37/+326
Various "git p4" updates. * pw/git-p4: git p4 doc: use two-line style for options with multiple spellings git p4 test: examine behavior with locked (+l) files git p4: fix an error message when "p4 where" fails git p4: handle files with wildcards when doing RCS scrubbing git p4 test: do not pollute /tmp git p4 test: run as user "author" git p4 test: is_cli_file_writeable succeeds git p4 test: explicitly check p4 wildcard delete git p4: work around p4 bug that causes empty symlinks git p4 test: ensure p4 symlink parsing works git p4 test: wildcards are supported
2014-01-27Merge branch 'jk/mark-edges-uninteresting'Libravatar Junio C Hamano1-0/+12
Fix performance regression in v1.8.4.x and later. * jk/mark-edges-uninteresting: list-objects: only look at cmdline trees with edge_hint t/perf: time rev-list with UNINTERESTING commits
2014-01-27Merge branch 'jk/interpret-branch-name-fix'Libravatar Junio C Hamano2-1/+51
Fix a handful of bugs around interpreting $branch@{upstream} notation and its lookalike, when $branch part has interesting characters, e.g. "@", and ":". * jk/interpret-branch-name-fix: interpret_branch_name: find all possible @-marks interpret_branch_name: avoid @{upstream} past colon interpret_branch_name: always respect "namelen" parameter interpret_branch_name: rename "cp" variable to "at" interpret_branch_name: factor out upstream handling
2014-01-27Merge branch 'jk/allow-fetch-onelevel-refname'Libravatar Junio C Hamano1-0/+11
"git clone" would fail to clone from a repository that has a ref directly under "refs/", e.g. "refs/stash", because different validation paths do different things on such a refname. Loosen the client side's validation to allow such a ref. * jk/allow-fetch-onelevel-refname: fetch-pack: do not filter out one-level refs
2014-01-27Merge branch 'jc/revision-range-unpeel'Libravatar Junio C Hamano1-0/+17
"git log --left-right A...B" lost the "leftness" of commits reachable from A when A is a tag as a side effect of a recent bugfix. This is a regression in 1.8.4.x series. * jc/revision-range-unpeel: revision: propagate flag bits from tags to pointees revision: mark contents of an uninteresting tree uninteresting
2014-01-27tree_entry_interesting: match against all pathspecsLibravatar Andy Spencer1-0/+13
The current basedir compare aborts early in order to avoid futile recursive searches. However, a match may still be found by another pathspec. This can cause an error while checking out files from a branch when using multiple pathspecs: $ git checkout master -- 'a/*.txt' 'b/*.txt' error: pathspec 'a/*.txt' did not match any file(s) known to git. Signed-off-by: Andy Spencer <andy753421@gmail.com> Acked-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2014-01-23t7700: do not use "touch" unnecessarilyLibravatar Jeff King1-1/+1
Some versions of touch (such as /usr/ucb/touch on Solaris) do not know about the "-r" option. This would make sense as a feature of test-chmtime, but fortunately this fix is even easier. The test does not care about the timestamp of the .keep file it creates at all, only that it exists. For such a use case, with or without portability issues around "-r", "touch" should not be used in the first place. Signed-off-by: Jeff King <peff@peff.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2014-01-23t7501: fix "empty commit" test with NO_PERLLibravatar Jeff King1-0/+1
t7501.9 tries to check that "git commit" will fail when the index is unchanged. It relies on previous tests not to have modified the index. When it was originally written, this was always the case. However, commit c65dc35 (t7501: test the right kind of breakage, 2012-03-30) changed earlier tests (4 and 5) to leave a modification in the index. We never noticed, however, because t7501.7, between the two, clears the index state as a side effect. However, that test depends on the PERL prerequisite, and so it does not always run. Therefore if NO_PERL is set, we do not run the intervening test, the index is left unclean, and t7501.9 fails. We could fix this by moving t7501.9 up in the script. However, this patch instead leaves it in place and adds a "git reset" before the commit. This makes the test more explicit about its preconditions, and will future-proof it against any other changes in the test state. Signed-off-by: Jeff King <peff@peff.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2014-01-23tree-walk.c: ignore trailing slash on submodule in tree_entry_interesting()Libravatar Nguyễn Thái Ngọc Duy1-0/+17
We do ignore trailing slash on a directory, so pathspec "abc/" matches directory "abc". A submodule is also a directory. Apply the same logic to it. This makes "git log submodule-path" and "git log submodule-path/" produce the same output. Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2014-01-22git p4 test: examine behavior with locked (+l) filesLibravatar Pete Wyckoff1-0/+145
The p4 server can enforce file locking, so that only one user can edit a file at a time. Git p4 is unable to submit changes to locked files. Currently it exits poorly. Ideally it would notice the locked condition and clean up nicely. Add a bunch of tests that describe the problem, hoping that fixes appear in the future. Signed-off-by: Pete Wyckoff <pw@padd.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2014-01-22git p4: handle files with wildcards when doing RCS scrubbingLibravatar Pete Wyckoff1-0/+23
Commit 9d7d446 (git p4: submit files with wildcards, 2012-04-29) fixed problems with handling files that had p4 wildcard characters, like "@" and "*". But it missed one case, that of RCS keyword scrubbing, which uses "p4 fstat" to extract type information. Fix it by calling wildcard_encode() on the raw filename. Signed-off-by: Pete Wyckoff <pw@padd.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2014-01-22git p4 test: do not pollute /tmpLibravatar Pete Wyckoff2-3/+11
Generating the submit template for p4 uses tempfile.mkstemp(), which by default puts files in /tmp. For a test that fails, possibly on purpose, this is not cleaned up. Run with TMPDIR pointing into the trash directory so the temp files go away with the test results. To do this required some other minor changes. First, the editor is launched using system(editor + " " + template_file), using shell expansion to build the command string. This doesn't work if editor has a space in it. And is generally unwise as it's easy to fool the shell into doing extra work. Exec the args directly, without shell expansion. Second, without shell expansion, the trick of "P4EDITOR=:" used in the tests doesn't work. Use a real command, true, as the non-interactive editor for testing. Signed-off-by: Pete Wyckoff <pw@padd.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2014-01-22git p4 test: run as user "author"Libravatar Pete Wyckoff2-25/+28
The tests use author@example.com as the canonical submitter, but he does not have an entry in the p4 users database. This causes the generated change description to complain that the git and p4 users disagree. The complaint message is still valid, but isn't useful in tests. It was introduced in 848de9c (git-p4: warn if git authorship won't be retained, 2011-05-13). Fix t9813 to use @example.com instead of @localhost due to change in p4_add_user(). Move the function into the git p4 test library so author can be added at initialization time. Signed-off-by: Pete Wyckoff <pw@padd.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2014-01-22git p4 test: is_cli_file_writeable succeedsLibravatar Pete Wyckoff1-1/+1
Commit e9df0f9 (git p4: cygwin p4 client does not mark read-only, 2013-01-26) fixed a problem with "test -w" on cygwin, but mistakenly marked the new test as failing. Fix this. Signed-off-by: Pete Wyckoff <pw@padd.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2014-01-22git p4 test: explicitly check p4 wildcard deleteLibravatar Pete Wyckoff1-0/+27
There was no test where p4 deleted a file with a wildcard character. Make sure git p4 applies the wildcard decoding properly when importing a delete that includes a wildcard. Signed-off-by: Pete Wyckoff <pw@padd.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2014-01-22git p4: work around p4 bug that causes empty symlinksLibravatar Pete Wyckoff1-0/+66
Damien Gérard highlights an interesting problem. Some p4 repositories end up with symlinks that have an empty target. It is not possible to create this with current p4, but they do indeed exist. The effect in git p4 is that "p4 print" on the symlink returns an empty string, confusing the curret symlink-handling code. Such broken repositories cause problems in p4 as well, even with no git involved. In p4, syncing to a change that includes a bogus symlink causes errors: //depot/empty-symlink - updating /home/me/p4/empty-symlink rename: /home/me/p4/empty-symlink: No such file or directory and leaves no symlink. In git, replicate the p4 behavior by ignoring these bad symlinks. If, in a later p4 revision, the symlink happens to point to something non-null, the symlink will be replaced properly. Add a big test for all this too. This happens to be a regression introduced by 1292df1 (git-p4: Fix occasional truncation of symlink contents., 2013-08-08) and appeared first in 1.8.5. But it shows up only in p4 repositories of dubious character, so can wait for a proper release. Tested-by: Damien Gérard <damien@iwi.me> Signed-off-by: Pete Wyckoff <pw@padd.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2014-01-21git p4 test: ensure p4 symlink parsing worksLibravatar Pete Wyckoff1-0/+17
While this happens to work, there was no test to make sure that the basic importing of a symlink from p4 to git functioned. Add a simple test to create a symlink in p4 and import it into git, then verify that the symlink exists and has the correct target. Signed-off-by: Pete Wyckoff <pw@padd.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2014-01-21git p4 test: wildcards are supportedLibravatar Pete Wyckoff1-8/+8
Since 9d57c4a (git p4: implement view spec wildcards with "p4 where", 2013-08-30), all the wildcard types should be supported. Change must-fail tests to mark that they now pass. Signed-off-by: Pete Wyckoff <pw@padd.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2014-01-21t/perf: time rev-list with UNINTERESTING commitsLibravatar Jeff King1-0/+12
We time a straight "rev-list --all" and its "--object" counterpart, both going all the way to the root. However, we do not time a partial history walk. This patch adds an extreme case: a walk over a very small slice of history, but with a very large set of UNINTERESTING tips. This is similar to the connectivity check run by git on a small fetch, or the walk done by any pre-receive hooks that want to check incoming commits. This test reveals a performance regression in git v1.8.4.2, caused by fbd4a70 (list-objects: mark more commits as edges in mark_edges_uninteresting, 2013-08-16): Test fbd4a703^ fbd4a703 ------------------------------------------------------------------------------------------ 0001.1: rev-list --all 0.69(0.67+0.02) 0.69(0.68+0.01) +0.0% 0001.2: rev-list --all --objects 3.47(3.44+0.02) 3.48(3.44+0.03) +0.3% 0001.4: rev-list $commit --not --all 0.04(0.04+0.00) 0.04(0.04+0.00) +0.0% 0001.5: rev-list --objects $commit --not --all 0.04(0.03+0.00) 0.27(0.24+0.02) +575.0% Signed-off-by: Jeff King <peff@peff.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2014-01-17Merge branch 'nd/shallow-clone'Libravatar Junio C Hamano4-0/+404
Fetching from a shallow-cloned repository used to be forbidden, primarily because the codepaths involved were not carefully vetted and we did not bother supporting such usage. This attempts to allow object transfer out of a shallow-cloned repository in a controlled way (i.e. the receiver become a shallow repository with truncated history). * nd/shallow-clone: (31 commits) t5537: fix incorrect expectation in test case 10 shallow: remove unused code send-pack.c: mark a file-local function static git-clone.txt: remove shallow clone limitations prune: clean .git/shallow after pruning objects clone: use git protocol for cloning shallow repo locally send-pack: support pushing from a shallow clone via http receive-pack: support pushing to a shallow clone via http smart-http: support shallow fetch/clone remote-curl: pass ref SHA-1 to fetch-pack as well send-pack: support pushing to a shallow clone receive-pack: allow pushes that update .git/shallow connected.c: add new variant that runs with --shallow-file add GIT_SHALLOW_FILE to propagate --shallow-file to subprocesses receive/send-pack: support pushing from a shallow clone receive-pack: reorder some code in unpack() fetch: add --update-shallow to accept refs that update .git/shallow upload-pack: make sure deepening preserves shallow roots fetch: support fetching from a shallow repository clone: support remote shallow repository ...
2014-01-15revision: propagate flag bits from tags to pointeesLibravatar Junio C Hamano1-0/+11
With the previous fix 895c5ba3 (revision: do not peel tags used in range notation, 2013-09-19), handle_revision_arg() that processes command line arguments for the "git log" family of commands no longer directly places the object pointed by the tag in the pending object array when it sees a tag object. We used to place pointee there after copying the flag bits like UNINTERESTING and SYMMETRIC_LEFT. This change meant that any flag that is relevant to later history traversal must now be propagated to the pointed objects (most often these are commits) while starting the traversal, which is partly done by handle_commit() that is called from prepare_revision_walk(). We did propagate UNINTERESTING, but did not do so for others, most notably SYMMETRIC_LEFT. This caused "git log --left-right v1.0..." (where "v1.0" is a tag) to start losing the "leftness" from the commit the tag points at. Signed-off-by: Junio C Hamano <gitster@pobox.com>
2014-01-15revision: mark contents of an uninteresting tree uninterestingLibravatar Junio C Hamano1-0/+6
"git rev-list --objects ^A^{tree} B^{tree}" ought to mean "I want a list of objects inside B's tree, but please exclude the objects that appear inside A's tree". we see the top-level tree marked as uninteresting (i.e. ^A^{tree} in the above example) and call mark_tree_uninteresting() on it; this unfortunately prevents us from recursing into the tree and marking the objects in the tree as uninteresting. The reason why "git log ^A A" yields an empty set of commits, i.e. we do not have a similar issue for commits, is because we call mark_parents_uninteresting() after seeing an uninteresting commit. The uninteresting-ness of the commit itself does not prevent its parents from being marked as uninteresting. Introduce mark_tree_contents_uninteresting() and structure the code in handle_commit() in such a way that it makes it the responsibility of the callchain leading to this function to mark commits, trees and blobs as uninteresting, and also make it the responsibility of the helpers called from this function to mark objects that are reachable from them. Note that this is a very old bug that probably dates back to the day when "rev-list --objects" was introduced. The line to clear tree->object.parsed at the end of mark_tree_contents_uninteresting() can be removed when this fix is merged to the codebase after 6e454b9a (clear parsed flag when we free tree buffers, 2013-06-05). Signed-off-by: Junio C Hamano <gitster@pobox.com>
2014-01-15interpret_branch_name: find all possible @-marksLibravatar Jeff King1-0/+21
When we parse a string like "foo@{upstream}", we look for the first "@"-sign, and check to see if it is an upstream mark. However, since branch names can contain an @, we may also see "@foo@{upstream}". In this case, we check only the first @, and ignore the second. As a result, we do not find the upstream. We can solve this by iterating through all @-marks in the string, and seeing if any is a legitimate upstream or empty-at mark. Another strategy would be to parse from the right-hand side of the string. However, that does not work for the "empty_at" case, which allows "@@{upstream}". We need to find the left-most one in this case (and we then recurse as "HEAD@{upstream}"). Signed-off-by: Jeff King <peff@peff.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2014-01-15interpret_branch_name: avoid @{upstream} past colonLibravatar Jeff King1-0/+16
get_sha1() cannot currently parse a valid object name like "HEAD:@{upstream}" (assuming that such an oddly named file exists in the HEAD commit). It takes two passes to parse the string: 1. It first considers the whole thing as a ref, which results in looking for the upstream of "HEAD:". 2. It finds the colon, parses "HEAD" as a tree-ish, and then finds the path "@{upstream}" in the tree. For a path that looks like a normal reflog (e.g., "HEAD:@{yesterday}"), the first pass is a no-op. We try to dwim_ref("HEAD:"), that returns zero refs, and we proceed with colon-parsing. For "HEAD:@{upstream}", though, the first pass ends up in interpret_upstream_mark, which tries to find the branch "HEAD:". When it sees that the branch does not exist, it actually dies rather than returning an error to the caller. As a result, we never make it to the second pass. One obvious way of fixing this would be to teach interpret_upstream_mark to simply report "no, this isn't an upstream" in such a case. However, that would make the error-reporting for legitimate upstream cases significantly worse. Something like "bogus@{upstream}" would simply report "unknown revision: bogus@{upstream}", while the current code diagnoses a wide variety of possible misconfigurations (no such branch, branch exists but does not have upstream, etc). However, we can take advantage of the fact that a branch name cannot contain a colon. Therefore even if we find an upstream mark, any prefix with a colon must mean that the upstream mark we found is actually a pathname, and should be disregarded completely. This patch implements that logic. Signed-off-by: Jeff King <peff@peff.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2014-01-15interpret_branch_name: always respect "namelen" parameterLibravatar Jeff King1-1/+14
interpret_branch_name gets passed a "name" buffer to parse, along with a "namelen" parameter representing its length. If "namelen" is zero, we fallback to the NUL-terminated string-length of "name". However, it does not necessarily follow that if we have gotten a non-zero "namelen", it is the NUL-terminated string-length of "name". E.g., when get_sha1() is parsing "foo:bar", we will be asked to operate only on the first three characters. Yet in interpret_branch_name and its helpers, we use string functions like strchr() to operate on "name", looking past the length we were given. This can result in us mis-parsing object names. We should instead be limiting our search to "namelen" bytes. There are three distinct types of object names this patch addresses: - The intrepret_empty_at helper uses strchr to find the next @-expression after our potential empty-at. In an expression like "@:foo@bar", it erroneously thinks that the second "@" is relevant, even if we were asked only to look at the first character. This case is easy to trigger (and we test it in this patch). - When finding the initial @-mark for @{upstream}, we use strchr. This means we might treat "foo:@{upstream}" as the upstream for "foo:", even though we were asked only to look at "foo". We cannot test this one in practice, because it is masked by another bug (which is fixed in the next patch). - The interpret_nth_prior_checkout helper did not receive the name length at all. This turns out not to be a problem in practice, though, because its parsing is so limited: it always starts from the far-left of the string, and will not tolerate a colon (which is currently the only way to get a smaller-than-strlen "namelen"). However, it's still worth fixing to make the code more obviously correct, and to future-proof us against callers with more exotic buffers. Signed-off-by: Jeff King <peff@peff.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2014-01-15fetch-pack: do not filter out one-level refsLibravatar Jeff King1-0/+11
Currently fetching a one-level ref like "refs/foo" does not work consistently. The outer "git fetch" program filters the list of refs, checking each against check_refname_format. Then it feeds the result to do_fetch_pack to actually negotiate the haves/wants and get the pack. The fetch-pack code does its own filter, and it behaves differently. The fetch-pack filter looks for refs in "refs/", and then feeds everything _after_ the slash (i.e., just "foo") into check_refname_format. But check_refname_format is not designed to look at a partial refname. It complains that the ref has only one component, thinking it is at the root (i.e., alongside "HEAD"), when in reality we just fed it a partial refname. As a result, we omit a ref like "refs/foo" from the pack request, even though "git fetch" then tries to store the resulting ref. If we happen to get the object anyway (e.g., because the ref is contained in another ref we are fetching), then the fetch succeeds. But if it is a unique object, we fail when trying to update "refs/foo". We can fix this by just passing the whole refname into check_refname_format; we know the part we were omitting is "refs/", which is acceptable in a refname. This at least makes the checks consistent with each other. This problem happens most commonly with "refs/stash", which is the only one-level ref in wide use. However, our test does not use "refs/stash", as we may later want to restrict it specifically (not because it is one-level, but because of the semantics of stashes). We may also want to do away with the multiple levels of filtering (which can cause problems when they are out of sync), or even forbid one-level refs entirely. However, those decisions can come later; this fixes the most immediate problem, which is the mismatch between the two. Signed-off-by: Jeff King <peff@peff.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2014-01-13Merge branch 'jk/t5531-prepare-to-default-to-non-matching'Libravatar Junio C Hamano1-0/+1
* jk/t5531-prepare-to-default-to-non-matching: t5531: further "matching" fixups
2014-01-13Merge branch 'sb/diff-orderfile-config'Libravatar Junio C Hamano1-4/+0
Finishing touches to avoid casting unnecessary detail in stone. * sb/diff-orderfile-config: diff test: reading a directory as a file need not error out
2014-01-13Merge branch 'jl/submodule-mv-checkout-caveat'Libravatar Junio C Hamano2-0/+37
With a submodule that was initialized in an old fashioned way without gitlinks, switching branches in the superproject between the one with and without the submodule may leave the submodule working tree with its embedded repository behind, as there may be unexpendable state there. Document and warn users about this. * jl/submodule-mv-checkout-caveat: rm: better document side effects when removing a submodule mv: better document side effects when moving a submodule
2014-01-13Merge branch 'jk/pull-rebase-using-fork-point'Libravatar Junio C Hamano1-2/+10
Finishing touches. * jk/pull-rebase-using-fork-point: rebase: fix fork-point with zero arguments