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2020-06-29Merge branch 'sk/diff-files-show-i-t-a-as-new'Libravatar Junio C Hamano1-8/+45
"git diff-files" has been taught to say paths that are marked as intent-to-add are new files, not modified from an empty blob. * sk/diff-files-show-i-t-a-as-new: diff-files: treat "i-t-a" files as "not-in-index"
2020-06-29Merge branch 'xl/upgrade-repo-format'Libravatar Junio C Hamano5-4/+26
Allow runtime upgrade of the repository format version, which needs to be done carefully. There is a rather unpleasant backward compatibility worry with the last step of this series, but it is the right thing to do in the longer term. * xl/upgrade-repo-format: check_repository_format_gently(): refuse extensions for old repositories sparse-checkout: upgrade repository to version 1 when enabling extension fetch: allow adding a filter after initial clone repository: add a helper function to perform repository format upgrade
2020-06-25Merge branch 'pb/t4014-unslave'Libravatar Junio C Hamano1-4/+4
A branch name used in a test has been clarified to match what is going on. * pb/t4014-unslave: t4014: do not use "slave branch" nomenclature
2020-06-25Merge branch 'jt/cdn-offload'Libravatar Junio C Hamano2-0/+118
The "fetch/clone" protocol has been updated to allow the server to instruct the clients to grab pre-packaged packfile(s) in addition to the packed object data coming over the wire. * jt/cdn-offload: upload-pack: fix a sparse '0 as NULL pointer' warning upload-pack: send part of packfile response as uri fetch-pack: support more than one pack lockfile upload-pack: refactor reading of pack-objects out Documentation: add Packfile URIs design doc Documentation: order protocol v2 sections http-fetch: support fetching packfiles by URL http-fetch: refactor into function http: refactor finish_http_pack_request() http: use --stdin when indexing dumb HTTP pack
2020-06-25Merge branch 'dl/branch-cleanup'Libravatar Junio C Hamano1-24/+43
Code clean-up around "git branch" with a minor bugfix. * dl/branch-cleanup: branch: don't mix --edit-description t3200: test for specific errors t3200: rename "expected" to "expect"
2020-06-25Merge branch 'ct/diff-with-merge-base-clarification'Libravatar Junio C Hamano2-1/+92
"git diff" used to take arguments in random and nonsense range notation, e.g. "git diff A..B C", "git diff A..B C...D", etc., which has been cleaned up. * ct/diff-with-merge-base-clarification: Documentation: usage for diff combined commits git diff: improve range handling t/t3430: avoid undefined git diff behavior
2020-06-25Merge branch 'jk/complete-git-switch'Libravatar Junio C Hamano1-0/+455
The command line completion (in contrib/) learned to complete options that the "git switch" command takes. * jk/complete-git-switch: completion: improve handling of --orphan option of switch/checkout completion: improve handling of -c/-C and -b/-B in switch/checkout completion: improve handling of --track in switch/checkout completion: improve handling of --detach in checkout completion: improve completion for git switch with no options completion: improve handling of DWIM mode for switch/checkout completion: perform DWIM logic directly in __git_complete_refs completion: extract function __git_dwim_remote_heads completion: replace overloaded track term for __git_complete_refs completion: add tests showing subpar switch/checkout --orphan logic completion: add tests showing subpar -c/C argument completion completion: add tests showing subpar -c/-C startpoint completion completion: add tests showing subpar switch/checkout --track logic completion: add tests showing subar checkout --detach logic completion: add tests showing subpar DWIM logic for switch/checkout completion: add test showing subpar git switch completion
2020-06-22Merge branch 'es/worktree-duplicate-paths'Libravatar Junio C Hamano2-0/+45
The same worktree directory must be registered only once, but "git worktree move" allowed this invariant to be violated, which has been corrected. * es/worktree-duplicate-paths: worktree: make "move" refuse to move atop missing registered worktree worktree: generalize candidate worktree path validation worktree: prune linked worktree referencing main worktree path worktree: prune duplicate entries referencing same worktree path worktree: make high-level pruning re-usable worktree: give "should be pruned?" function more meaningful name worktree: factor out repeated string literal
2020-06-22Merge branch 'jt/redact-all-cookies'Libravatar Junio C Hamano1-14/+24
The interface to redact sensitive information in the trace output has been simplified. * jt/redact-all-cookies: http: redact all cookies, teach GIT_TRACE_REDACT=0
2020-06-22diff-files: treat "i-t-a" files as "not-in-index"Libravatar Srinidhi Kaushik1-8/+45
The `diff-files' command and related commands which call the function `cmd_diff_files()', consider the "intent-to-add" files as a part of the index when comparing the work-tree against it. This was previously addressed in commits [1] and [2] by turning the option `--ita-invisible-in-index' (introduced in [3]) on by default. For `diff-files' (and `add -p' as a consequence) to show the i-t-a files as as new, `ita_invisible_in_index' will be enabled by default here as well. [1] 0231ae71d3 (diff: turn --ita-invisible-in-index on by default, 2018-05-26) [2] 425a28e0a4 (diff-lib: allow ita entries treated as "not yet exist in index", 2016-10-24) [3] b42b451919 (diff: add --ita-[in]visible-in-index, 2016-10-24) Signed-off-by: Srinidhi Kaushik <shrinidhi.kaushik@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-06-19t4014: do not use "slave branch" nomenclatureLibravatar Paolo Bonzini1-4/+4
Git branches have been qualified as topic branches, integration branches, development branches, feature branches, release branches and so on. Git has a branch that is the master *for* development, but it is not the master *of* any "slave branch": Git does not have slave branches, and has never had, except for a single testcase that claims otherwise. :) Independent of any future change to the naming of the "master" branch, removing this sole appearance of the term is a strict improvement: it avoids divisive language, and talking about "feature branch" clarifies which developer workflow the test is trying to emulate. Reported-by: Till Maas <tmaas@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-06-17Merge branch 'dl/t-readme-spell-git-correctly'Libravatar Junio C Hamano1-7/+7
Doc updates. * dl/t-readme-spell-git-correctly: t/README: avoid poor-man's small caps GIT
2020-06-17Merge branch 'en/do-match-pathspec-fix'Libravatar Junio C Hamano1-0/+33
Use of negative pathspec, while collecting paths including untracked ones in the working tree, was broken. * en/do-match-pathspec-fix: dir: fix treatment of negated pathspecs
2020-06-17Merge branch 'en/sparse-checkout'Libravatar Junio C Hamano1-0/+22
The behaviour of "sparse-checkout" in the state "git clone --no-checkout" left was changed accidentally in 2.27, which has been corrected. * en/sparse-checkout: sparse-checkout: avoid staging deletions of all files
2020-06-17Merge branch 'js/reflog-anonymize-for-clone-and-fetch'Libravatar Junio C Hamano1-0/+15
The reflog entries for "git clone" and "git fetch" did not anonymize the URL they operated on. * js/reflog-anonymize-for-clone-and-fetch: clone/fetch: anonymize URLs in the reflog
2020-06-17Merge branch 'tb/t5318-cleanup'Libravatar Junio C Hamano1-4/+25
Code cleanup. * tb/t5318-cleanup: t5318: test that '--stdin-commits' respects '--[no-]progress' t5318: use 'test_must_be_empty'
2020-06-17t3200: test for specific errorsLibravatar Denton Liu1-13/+32
In the "--set-upstream-to" and "--unset-upstream" tests, specific error conditions are being tested. However, there is no way of ensuring that a test case is failing because of some specific error. Check stderr of failing commands to ensure that they are failing in the expected way. Signed-off-by: Denton Liu <liu.denton@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-06-17t3200: rename "expected" to "expect"Libravatar Denton Liu1-11/+11
Clean up style of test by changing some filenames from "expected" to "expect", which follows typical test convention. Also, change a space-indent into a tab-indent. Signed-off-by: Denton Liu <liu.denton@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-06-12Merge branch 'hn/refs-cleanup'Libravatar Junio C Hamano5-21/+21
Preliminary clean-ups around refs API, plus file format specification documentation for the reftable backend. * hn/refs-cleanup: reftable: define version 2 of the spec to accomodate SHA256 reftable: clarify how empty tables should be written reftable: file format documentation refs: improve documentation for ref iterator t: use update-ref and show-ref to reading/writing refs refs.h: clarify reflog iteration order
2020-06-12git diff: improve range handlingLibravatar Chris Torek1-0/+91
When git diff is given a symmetric difference A...B, it chooses some merge base from the two specified commits (as documented). This fails, however, if there is *no* merge base: instead, you see the differences between A and B, which is certainly not what is expected. Moreover, if additional revisions are specified on the command line ("git diff A...B C"), the results get a bit weird: * If there is a symmetric difference merge base, this is used as the left side of the diff. The last final ref is used as the right side. * If there is no merge base, the symmetric status is completely lost. We will produce a combined diff instead. Similar weirdness occurs if you use, e.g., "git diff C A...B D". Likewise, using multiple two-dot ranges, or tossing extra revision specifiers into the command line with two-dot ranges, or mixing two and three dot ranges, all produce nonsense. To avoid all this, add a routine to catch the range cases and verify that that the arguments make sense. As a side effect, produce a warning showing *which* merge base is being used when there are multiple choices; die if there is no merge base. Signed-off-by: Chris Torek <chris.torek@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-06-10upload-pack: send part of packfile response as uriLibravatar Jonathan Tan1-0/+88
Teach upload-pack to send part of its packfile response as URIs. An administrator may configure a repository with one or more "uploadpack.blobpackfileuri" lines, each line containing an OID, a pack hash, and a URI. A client may configure fetch.uriprotocols to be a comma-separated list of protocols that it is willing to use to fetch additional packfiles - this list will be sent to the server. Whenever an object with one of those OIDs would appear in the packfile transmitted by upload-pack, the server may exclude that object, and instead send the URI. The client will then download the packs referred to by those URIs before performing the connectivity check. Signed-off-by: Jonathan Tan <jonathantanmy@google.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-06-10http-fetch: support fetching packfiles by URLLibravatar Jonathan Tan1-0/+30
Teach http-fetch the ability to download packfiles directly, given a URL, and to verify them. The http_pack_request suite has been augmented with a function that takes a URL directly. With this function, the hash is only used to determine the name of the temporary file. Signed-off-by: Jonathan Tan <jonathantanmy@google.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-06-10worktree: make "move" refuse to move atop missing registered worktreeLibravatar Eric Sunshine1-0/+21
"git worktree add" takes special care to avoid creating a new worktree at a location already registered to an existing worktree even if that worktree is missing (which can happen, for instance, if the worktree resides on removable media). "git worktree move", however, is not so careful when validating the destination location and will happily move the source worktree atop the location of a missing worktree. This leads to the anomalous situation of multiple worktrees being associated with the same path, which is expressly forbidden by design. For example: $ git clone foo.git $ cd foo $ git worktree add ../bar $ git worktree add ../baz $ rm -rf ../bar $ git worktree move ../baz ../bar $ git worktree list .../foo beefd00f [master] .../bar beefd00f [bar] .../bar beefd00f [baz] $ git worktree remove ../bar fatal: validation failed, cannot remove working tree: '.../bar' does not point back to '.git/worktrees/bar' Fix this shortcoming by enhancing "git worktree move" to perform the same additional validation of the destination directory as done by "git worktree add". While at it, add a test to verify that "git worktree move" won't move a worktree atop an existing (non-worktree) path -- a restriction which has always been in place but was never tested. Signed-off-by: Eric Sunshine <sunshine@sunshineco.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-06-10worktree: prune linked worktree referencing main worktree pathLibravatar Eric Sunshine1-0/+12
"git worktree prune" detects when multiple entries are associated with the same path and prunes the duplicates, however, it does not detect when a linked worktree points at the path of the main worktree. Although "git worktree add" disallows creating a new worktree with the same path as the main worktree, such a case can arise outside the control of Git even without the user mucking with .git/worktree/<id>/ administrative files. For instance: $ git clone foo.git $ git -C foo worktree add ../bar $ rm -rf bar $ mv foo bar $ git -C bar worktree list .../bar deadfeeb [master] .../bar deadfeeb [bar] Help the user recover from such corruption by extending "git worktree prune" to also detect when a linked worktree is associated with the path of the main worktree. Reported-by: Jonathan Müller <jonathanmueller.dev@gmail.com> Signed-off-by: Eric Sunshine <sunshine@sunshineco.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-06-10worktree: prune duplicate entries referencing same worktree pathLibravatar Eric Sunshine1-0/+12
A fundamental restriction of linked working trees is that there must only ever be a single worktree associated with a particular path, thus "git worktree add" explicitly disallows creation of a new worktree at the same location as an existing registered worktree. Nevertheless, users can still "shoot themselves in the foot" by mucking with administrative files in .git/worktree/<id>/. Worse, "git worktree move" is careless[1] and allows a worktree to be moved atop a registered but missing worktree (which can happen, for instance, if the worktree is on removable media). For instance: $ git clone foo.git $ cd foo $ git worktree add ../bar $ git worktree add ../baz $ rm -rf ../bar $ git worktree move ../baz ../bar $ git worktree list .../foo beefd00f [master] .../bar beefd00f [bar] .../bar beefd00f [baz] Help users recover from this form of corruption by teaching "git worktree prune" to detect when multiple worktrees are associated with the same path. [1]: A subsequent commit will fix "git worktree move" validation to be more strict. Signed-off-by: Eric Sunshine <sunshine@sunshineco.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-06-09t/t3430: avoid undefined git diff behaviorLibravatar Chris Torek1-1/+1
The autosquash-and-exec test used "git diff HEAD^!" to mean "git diff HEAD^ HEAD". Use these directly instead of relying on the undefined but actual-current behavior of "HEAD^!". Signed-off-by: Chris Torek <chris.torek@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-06-08Merge branch 'jt/curl-verbose-on-trace-curl'Libravatar Junio C Hamano2-1/+37
Rewrite support for GIT_CURL_VERBOSE in terms of GIT_TRACE_CURL. Looking good. * jt/curl-verbose-on-trace-curl: http, imap-send: stop using CURLOPT_VERBOSE t5551: test that GIT_TRACE_CURL redacts password
2020-06-08Merge branch 'cb/bisect-helper-parser-fix'Libravatar Junio C Hamano1-0/+2
The code to parse "git bisect start" command line was lax in validating the arguments. * cb/bisect-helper-parser-fix: bisect--helper: avoid segfault with bad syntax in `start --term-*`
2020-06-08Merge branch 'js/checkout-p-new-file'Libravatar Junio C Hamano1-0/+19
"git checkout -p" did not handle a newly added path at all. * js/checkout-p-new-file: checkout -p: handle new files correctly
2020-06-08Merge branch 'dl/remote-curl-deadlock-fix'Libravatar Junio C Hamano6-0/+67
On-the-wire protocol v2 easily falls into a deadlock between the remote-curl helper and the fetch-pack process when the server side prematurely throws an error and disconnects. The communication has been updated to make it more robust. * dl/remote-curl-deadlock-fix: stateless-connect: send response end packet pkt-line: define PACKET_READ_RESPONSE_END remote-curl: error on incomplete packet pkt-line: extern packet_length() transport: extract common fetch_pack() call remote-curl: remove label indentation remote-curl: fix typo
2020-06-08Merge branch 'bc/filter-process'Libravatar Junio C Hamano1-0/+8
Code simplification and test coverage enhancement. * bc/filter-process: t2060: add a test for switch with --orphan and --discard-changes builtin/checkout: simplify metadata initialization
2020-06-08Merge branch 'rs/fsck-duplicate-names-in-trees'Libravatar Junio C Hamano1-15/+28
The check in "git fsck" to ensure that the tree objects are sorted still had corner cases it missed unsorted entries. * rs/fsck-duplicate-names-in-trees: fsck: detect more in-tree d/f conflicts t1450: demonstrate undetected in-tree d/f conflict t1450: increase test coverage of in-tree d/f detection fsck: fix a typo in a comment
2020-06-08Merge branch 'tb/commit-graph-no-check-oids'Libravatar Junio C Hamano1-9/+16
Clean-up the commit-graph codepath. * tb/commit-graph-no-check-oids: commit-graph: drop COMMIT_GRAPH_WRITE_CHECK_OIDS flag t5318: reorder test below 'graph_read_expect' commit-graph.c: simplify 'fill_oids_from_commits' builtin/commit-graph.c: dereference tags in builtin builtin/commit-graph.c: extract 'read_one_commit()' commit-graph.c: peel refs in 'add_ref_to_set' commit-graph.c: show progress of finding reachable commits commit-graph.c: extract 'refs_cb_data'
2020-06-08Merge branch 'cb/t4210-illseq-auto-detect'Libravatar Junio C Hamano3-52/+125
As FreeBSD is not the only platform whose regexp library reports a REG_ILLSEQ error when fed invalid UTF-8, add logic to detect that automatically and skip the affected tests. * cb/t4210-illseq-auto-detect: t4210: detect REG_ILLSEQ dynamically and skip affected tests t/helper: teach test-regex to report pattern errors (like REG_ILLSEQ)
2020-06-08Merge branch 'ds/line-log-on-bloom'Libravatar Junio C Hamano1-0/+68
"git log -L..." now takes advantage of the "which paths are touched by this commit?" info stored in the commit-graph system. * ds/line-log-on-bloom: line-log: integrate with changed-path Bloom filters line-log: try to use generation number-based topo-ordering line-log: more responsive, incremental 'git log -L' t4211-line-log: add tests for parent oids line-log: remove unused fields from 'struct line_log_data'
2020-06-08t/README: avoid poor-man's small caps GITLibravatar Denton Liu1-7/+7
In 48a8c26c62 (Documentation: avoid poor-man's small caps GIT, 2013-01-21), the documentation was amended to spell Git's name as Git when talking about the system as a whole. However, t/README was skipped over when the treatment was applied. Bring t/README into conformance with the CodingGuidelines by casing "Git" properly. While we're at it, fix a small typo. Change "the git internal" to "the Git internals". Signed-off-by: Denton Liu <liu.denton@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-06-05http: redact all cookies, teach GIT_TRACE_REDACT=0Libravatar Jonathan Tan1-14/+24
In trace output (when GIT_TRACE_CURL is true), redact the values of all HTTP cookies by default. Now that auth headers (since the implementation of GIT_TRACE_CURL in 74c682d3c6 ("http.c: implement the GIT_TRACE_CURL environment variable", 2016-05-24)) and cookie values (since this commit) are redacted by default in these traces, also allow the user to inhibit these redactions through an environment variable. Since values of all cookies are now redacted by default, GIT_REDACT_COOKIES (which previously allowed users to select individual cookies to redact) now has no effect. Signed-off-by: Jonathan Tan <jonathantanmy@google.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-06-05dir: fix treatment of negated pathspecsLibravatar Elijah Newren1-0/+33
do_match_pathspec() started life as match_pathspec_depth_1() and for correctness was only supposed to be called from match_pathspec_depth(). match_pathspec_depth() was later renamed to match_pathspec(), so the invariant we expect today is that do_match_pathspec() has no direct callers outside of match_pathspec(). Unfortunately, this intention was lost with the renames of the two functions, and additional calls to do_match_pathspec() were added in commits 75a6315f74 ("ls-files: add pathspec matching for submodules", 2016-10-07) and 89a1f4aaf7 ("dir: if our pathspec might match files under a dir, recurse into it", 2019-09-17). Of course, do_match_pathspec() had an important advantge over match_pathspec() -- match_pathspec() would hardcode flags to one of two values, and these new callers needed to pass some other value for flags. Also, although calling do_match_pathspec() directly was incorrect, there likely wasn't any difference in the observable end output, because the bug just meant that fill_diretory() would recurse into unneeded directories. Since subsequent does-this-path-match checks on individual paths under the directory would cause those extra paths to be filtered out, the only difference from using the wrong function was unnecessary computation. The second of those bad calls to do_match_pathspec() was involved -- via either direct movement or via copying+editing -- into a number of later refactors. See commits 777b420347 ("dir: synchronize treat_leading_path() and read_directory_recursive()", 2019-12-19), 8d92fb2927 ("dir: replace exponential algorithm with a linear one", 2020-04-01), and 95c11ecc73 ("Fix error-prone fill_directory() API; make it only return matches", 2020-04-01). The last of those introduced the usage of do_match_pathspec() on an individual file, and thus resulted in individual paths being returned that shouldn't be. The problem with calling do_match_pathspec() instead of match_pathspec() is that any negated patterns such as ':!unwanted_path` will be ignored. Add a new match_pathspec_with_flags() function to fulfill the needs of specifying special flags while still correctly checking negated patterns, add a big comment above do_match_pathspec() to prevent others from misusing it, and correct current callers of do_match_pathspec() to instead use either match_pathspec() or match_pathspec_with_flags(). One final note is that DO_MATCH_LEADING_PATHSPEC needs special consideration when working with DO_MATCH_EXCLUDE. The point of DO_MATCH_LEADING_PATHSPEC is that if we have a pathspec like */Makefile and we are checking a directory path like src/module/component that we want to consider it a match so that we recurse into the directory because it _might_ have a file named Makefile somewhere below. However, when we are using an exclusion pattern, i.e. we have a pathspec like :(exclude)*/Makefile we do NOT want to say that a directory path like src/module/component is a (negative) match. While there *might* be a file named 'Makefile' somewhere below that directory, there could also be other files and we cannot pre-emptively rule all the files under that directory out; we need to recurse and then check individual files. Adjust the DO_MATCH_LEADING_PATHSPEC logic to only get activated for positive pathspecs. Reported-by: John Millikin <jmillikin@stripe.com> Signed-off-by: Elijah Newren <newren@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-06-05check_repository_format_gently(): refuse extensions for old repositoriesLibravatar Xin Li1-0/+11
Previously, extensions were recognized regardless of repository format version.  If the user sets an undefined "extensions" value on a repository of version 0 and that value is used by a future git version, they might get an undesired result. Because all extensions now also upgrade repository versions, tightening the check would help avoid this for future extensions. Signed-off-by: Xin Li <delphij@google.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-06-05sparse-checkout: upgrade repository to version 1 when enabling extensionLibravatar Xin Li1-1/+3
The 'extensions' configuration variable gets special meaning in the new repository version, so when enabling the extension we should upgrade the repository to version 1. Signed-off-by: Xin Li <delphij@google.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-06-05fetch: allow adding a filter after initial cloneLibravatar Xin Li4-3/+12
Retroactively adding a filter can be useful for existing shallow clones as they allow users to see earlier change histories without downloading all git objects in a regular --unshallow fetch. Without this patch, users can make a clone partial by editing the repository configuration to convert the remote into a promisor, like:   git config core.repositoryFormatVersion 1   git config extensions.partialClone origin   git fetch --unshallow --filter=blob:none origin Since the hard part of making this work is already in place and such edits can be error-prone, teach Git to perform the required configuration change automatically instead. Note that this change does not modify the existing git behavior which recognizes setting extensions.partialClone without changing repositoryFormatVersion. Signed-off-by: Xin Li <delphij@google.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-06-05sparse-checkout: avoid staging deletions of all filesLibravatar Elijah Newren1-0/+22
sparse-checkout's purpose is to update the working tree to have it reflect a subset of the tracked files. As such, it shouldn't be switching branches, making commits, downloading or uploading data, or staging or unstaging changes. Other than updating the worktree, the only thing sparse-checkout should touch is the SKIP_WORKTREE bit of the index. In particular, this sets up a nice invariant: running sparse-checkout will never change the status of any file in `git status` (reflecting the fact that we only set the SKIP_WORKTREE bit if the file is safe to delete, i.e. if the file is unmodified). Traditionally, we did a _really_ bad job with this goal. The predecessor to sparse-checkout involved manual editing of .git/info/sparse-checkout and running `git read-tree -mu HEAD`. That command would stage and unstage changes and overwrite dirty changes in the working tree. The initial implementation of the sparse-checkout command was no better; it simply invoked `git read-tree -mu HEAD` as a subprocess and had the same caveats, though this issue came up repeatedly in review comments and workarounds for the problems were put in place before the feature was merged[1, 2, 3, 4, 5, 6; especially see 4 & 6]. [1] https://lore.kernel.org/git/CABPp-BFT9A5n=_bx5LsjCvbogqwSjiwgr5amcjgbU1iAk4KLJg@mail.gmail.com/ [2] https://lore.kernel.org/git/CABPp-BEmwSwg4tgJg6nVG8a3Hpn_g-=ZjApZF4EiJO+qVgu4uw@mail.gmail.com/ [3] https://lore.kernel.org/git/CABPp-BFV7TA0qwZCQpHCqx9N+JifyRyuBQ-pZ_oGfe-NOgyh7A@mail.gmail.com/ [4] https://lore.kernel.org/git/CABPp-BHYCCD+Vx5fq35jH82eHc1-P53Lz_aGNpHJNcx9kg2K-A@mail.gmail.com/ [5] https://lore.kernel.org/git/CABPp-BF+JWYZfDqp2Tn4AEKVp4b0YMA=Mbz4Nz62D-gGgiduYQ@mail.gmail.com/ [6] https://lore.kernel.org/git/20191121163706.GV23183@szeder.dev/ However, these workarounds, in addition to disabling the feature in a number of important cases, also missed one special case. I'll get back to it later. In the 2.27.0 cycle, the disabling of the feature was lifted by finally replacing the internal equivalent of `git read-tree -mu HEAD` with something that did what we wanted: the new update_sparsity() function in unpack-trees.c that only ever updates SKIP_WORKTREE bits in the index and updates the working tree to match. This new function handles all the cases that were problematic for the old implementation, except that it breaks the same special case that avoided the workarounds of the old implementation, but broke it in a different way. So...that brings us to the special case: a git clone performed with --no-checkout. As per the meaning of the flag, --no-checkout does not check out any branch, with the implication that you aren't on one and need to switch to one after the clone. Implementationally, HEAD is still set (so in some sense you are partially on a branch), but * the index is "unborn" (non-existent) * there are no files in the working tree (other than .git/) * the next time git switch (or git checkout) is run it will run unpack_trees with `initial_checkout` flag set to true. It is not until you run, e.g. `git switch <somebranch>` that the index will be written and files in the working tree populated. With this special --no-checkout case, the traditional `read-tree -mu HEAD` behavior would have done the equivalent of acting like checkout -- switch to the default branch (HEAD), write out an index that matches HEAD, and update the working tree to match. This special case slipped through the avoid-making-changes checks in the original sparse-checkout command and thus continued there. After update_sparsity() was introduced and used (see commit f56f31af03 ("sparse-checkout: use new update_sparsity() function", 2020-03-27)), the behavior for the --no-checkout case changed: Due to git's auto-vivification of an empty in-memory index (see do_read_index() and note that `must_exist` is false), and due to sparse-checkout's update_working_directory() code to always write out the index after it was done, we got a new bug. That made it so that sparse-checkout would switch the repository from a clone with an "unborn" index (i.e. still needing an initial_checkout), to one that had a recorded index with no entries. Thus, instead of all the files appearing deleted in `git status` being known to git as a special artifact of not yet being on a branch, our recording of an empty index made it suddenly look to git as though it was definitely on a branch with ALL files staged for deletion! A subsequent checkout or switch then had to contend with the fact that it wasn't on an initial_checkout but had a bunch of staged deletions. Make sure that sparse-checkout changes nothing in the index other than the SKIP_WORKTREE bit; in particular, when the index is unborn we do not have any branch checked out so there is no sparsification or de-sparsification work to do. Simply return from update_working_directory() early. Signed-off-by: Elijah Newren <newren@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-06-04clone/fetch: anonymize URLs in the reflogLibravatar Johannes Schindelin1-0/+15
Even if we strongly discourage putting credentials into the URLs passed via the command-line, there _is_ support for that, and users _do_ do that. Let's scrub them before writing them to the reflog. Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-06-04t5318: test that '--stdin-commits' respects '--[no-]progress'Libravatar Taylor Blau1-0/+21
The following lines were not covered in a recent line-coverage test against Git: builtin/commit-graph.c 5b6653e5 244) progress = start_delayed_progress( 5b6653e5 268) stop_progress(&progress); These statements are executed when both '--stdin-commits' and '--progress' are passed. Introduce a trio of tests that exercise various combinations of these options to ensure that these lines are covered. More importantly, this is exercising a (somewhat) previously-ignored feature of '--stdin-commits', which is that it respects '--progress'. Prior to 5b6653e523 (builtin/commit-graph.c: dereference tags in builtin, 2020-05-13), dereferencing input from '--stdin-commits' was done inside of commit-graph.c. Now that an additional progress meter may be generated from outside of commit-graph.c, add a corresponding test to make sure that it also respects '--[no]-progress'. The other location that generates progress meter output (from d335ce8f24 (commit-graph.c: show progress of finding reachable commits, 2020-05-13)) is already covered by any test that passes '--reachable'. Signed-off-by: Taylor Blau <me@ttaylorr.com> Acked-by: Derrick Stolee <dstolee@microsoft.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-06-04t5318: use 'test_must_be_empty'Libravatar Taylor Blau1-4/+4
A handful of tests in t5318 use 'test_line_count = 0 ...' to make sure that some command does not write any output. While correct, it is more idiomatic to use 'test_must_be_empty' instead. Switch the former invocations to use the latter instead. Signed-off-by: Taylor Blau <me@ttaylorr.com> Acked-by: Derrick Stolee <dstolee@microsoft.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-06-02Merge branch 'en/fast-import-looser-date'Libravatar Junio C Hamano1-0/+28
Some repositories in the wild have commits that record nonsense committer timezone (e.g. rails.git); "git fast-import" learned an option to pass these nonsense timestamps intact to allow recreating existing repositories as-is. * en/fast-import-looser-date: fast-import: add new --date-format=raw-permissive format
2020-06-02Merge branch 'la/diff-relative-config'Libravatar Junio C Hamano2-3/+92
The commands in the "diff" family learned to honor "diff.relative" configuration variable. * la/diff-relative-config: diff: add config option relative
2020-06-02Merge branch 'rs/checkout-b-track-error'Libravatar Junio C Hamano2-0/+34
The error message from "git checkout -b foo -t bar baz" was confusing. * rs/checkout-b-track-error: checkout: improve error messages for -b with extra argument checkout: add tests for -b and --track
2020-06-02Merge branch 'cb/t5608-cleanup'Libravatar Junio C Hamano1-6/+5
Test fixup. * cb/t5608-cleanup: t5608: avoid say() and use "skip_all" instead for consistency
2020-05-31Merge branch 'cb/test-use-ere-for-alternation'Libravatar Junio C Hamano2-2/+2
Portability fix for tests added recently. * cb/test-use-ere-for-alternation: t: avoid alternation (not POSIX) in grep's BRE