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2020-07-06Merge branch 'bc/http-push-flagsfix'Libravatar Junio C Hamano1-0/+16
The code to push changes over "dumb" HTTP had a bad interaction with the commit reachability code due to incorrect allocation of object flag bits, which has been corrected. * bc/http-push-flagsfix: http-push: ensure unforced pushes fail when data would be lost
2020-07-06Merge branch 'js/pu-to-seen'Libravatar Junio C Hamano3-14/+14
The documentation and some tests have been adjusted for the recent renaming of "pu" branch to "seen". * js/pu-to-seen: tests: reference `seen` wherever `pu` was referenced docs: adjust the technical overview for the rename `pu` -> `seen` docs: adjust for the recent rename of `pu` to `seen`
2020-07-06Merge branch 'cb/is-descendant-of'Libravatar Junio C Hamano1-1/+1
Code clean-up. * cb/is-descendant-of: commit-reach: avoid is_descendant_of() shim
2020-07-06Merge branch 'es/get-worktrees-unsort'Libravatar Junio C Hamano1-1/+1
API cleanup for get_worktrees() * es/get-worktrees-unsort: worktree: drop get_worktrees() unused 'flags' argument worktree: drop get_worktrees() special-purpose sorting option
2020-07-06Merge branch 'bc/sha-256-cvs-svn-updates'Libravatar Junio C Hamano7-25/+44
CVS/SVN interface have been prepared for SHA-256 transition * bc/sha-256-cvs-svn-updates: git-cvsexportcommit: port to SHA-256 git-cvsimport: port to SHA-256 git-cvsserver: port to SHA-256 git-svn: set the OID length based on hash algorithm perl: make SVN code hash independent perl: make Git::IndexInfo work with SHA-256 perl: create and switch variables for hash constants t/lib-git-svn: make hash size independent t9101: make hash independent t9104: make hash size independent t9100: make test work with SHA-256 t9108: make test hash independent t9168: make test hash independent t9109: make test hash independent
2020-07-06Merge branch 'ak/commit-graph-to-slab'Libravatar Junio C Hamano1-1/+1
A few fields in "struct commit" that do not have to always be present have been moved to commit slabs. * ak/commit-graph-to-slab: commit-graph: minimize commit_graph_data_slab access commit: move members graph_pos, generation to a slab commit-graph: introduce commit_graph_data_slab object: drop parsed_object_pool->commit_count
2020-07-06Merge branch 'ps/ref-transaction-hook'Libravatar Junio C Hamano2-0/+141
A new hook. * ps/ref-transaction-hook: refs: implement reference transaction hook
2020-07-06Merge branch 'bc/sha-256-part-2'Libravatar Junio C Hamano15-191/+274
SHA-256 migration work continues. * bc/sha-256-part-2: (44 commits) remote-testgit: adapt for object-format bundle: detect hash algorithm when reading refs t5300: pass --object-format to git index-pack t5704: send object-format capability with SHA-256 t5703: use object-format serve option t5702: offer an object-format capability in the test t/helper: initialize the repository for test-sha1-array remote-curl: avoid truncating refs with ls-remote t1050: pass algorithm to index-pack when outside repo builtin/index-pack: add option to specify hash algorithm remote-curl: detect algorithm for dumb HTTP by size builtin/ls-remote: initialize repository based on fetch t5500: make hash independent serve: advertise object-format capability for protocol v2 connect: parse v2 refs with correct hash algorithm connect: pass full packet reader when parsing v2 refs Documentation/technical: document object-format for protocol v2 t1302: expect repo format version 1 for SHA-256 builtin/show-index: provide options to determine hash algo t5302: modernize test formatting ...
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
2020-06-25tests: reference `seen` wherever `pu` was referencedLibravatar Johannes Schindelin3-14/+14
As our test suite partially reflects how we work in the Git project, it is natural that the branch name `pu` was used in a couple places. Since that branch was renamed to `seen`, let's use the new name consistently. Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-06-23commit-reach: avoid is_descendant_of() shimLibravatar Carlo Marcelo Arenas Belón1-1/+1
d91d6fbf26 (commit-reach: create repo_is_descendant_of(), 2020-06-17) adds a repository aware version of is_descendant_of() and a backward compatibility shim that is barely used. Update all callers to directly use the new repo_is_descendant_of() function instead; making the codebase simpler and pushing more the_repository references higher up the stack. Helped-by: Derrick Stolee <dstolee@microsoft.com> Signed-off-by: Carlo Marcelo Arenas Belón <carenas@gmail.com> Reviewed-by: Derrick Stolee <dstolee@microsoft.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-06-23http-push: ensure unforced pushes fail when data would be lostLibravatar brian m. carlson1-0/+16
When we push using the DAV-based protocol, the client is the one that performs the ref updates and therefore makes the checks to see whether an unforced push should be allowed. We make this check by determining if either (a) we lack the object file for the old value of the ref or (b) the new value of the ref is not newer than the old value, and in either case, reject the push. However, the ref_newer function, which performs this latter check, has an odd behavior due to the reuse of certain object flags. Specifically, it will incorrectly return false in its first invocation and then correctly return true on a subsequent invocation. This occurs because the object flags used by http-push.c are the same as those used by commit-reach.c, which implements ref_newer, and one piece of code misinterprets the flags set by the other. Note that this does not occur in all cases. For example, if the example used in the tests is changed to use one repository instead of two and rewind the head to add a commit, the test passes and we correctly reject the push. However, the example provided does trigger this behavior, and the code has been broken in this way since at least Git 2.0.0. To solve this problem, let's move the two sets of object flags so that they don't overlap, since we're clearly using them at the same time. The new set should not conflict with other usage because other users are either builtin code (which is not compiled into git http-push) or upload-pack (which we similarly do not use here). Reported-by: Michael Ward <mward@smartsoftwareinc.com> Signed-off-by: René Scharfe <l.s.r@web.de> Signed-off-by: brian m. carlson <sandals@crustytoothpaste.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
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
2020-06-22t/lib-git-svn: make hash size independentLibravatar brian m. carlson1-7/+10
The record size used in the git svn storage is four bytes plus the length of the binary hash. Pass the hash length into our Perl invocation and use it to compute the size of the records. Signed-off-by: brian m. carlson <sandals@crustytoothpaste.net> Acked-by: Eric Wong <e@80x24.org> Signed-off-by: Junio C Hamano <gitster@pobox.com>
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>
2020-06-22worktree: drop get_worktrees() unused 'flags' argumentLibravatar Eric Sunshine1-1/+1
get_worktrees() accepts a 'flags' argument, however, there are no existing flags (the lone flag GWT_SORT_LINKED was recently retired) and no behavior which can be tweaked. Therefore, drop the 'flags' argument. Signed-off-by: Eric Sunshine <sunshine@sunshineco.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-06-22t9101: make hash independentLibravatar brian m. carlson1-5/+7
Instead of hard-coding the object ID for our test .gitignore file, let's compute it. Signed-off-by: brian m. carlson <sandals@crustytoothpaste.net> Acked-by: Eric Wong <e@80x24.org> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-06-22t9104: make hash size independentLibravatar brian m. carlson1-1/+2
The size of a record in the database used by git svn is four bytes plus the length of the binary hash. Instead of hard-coding 24, compute this value based on the size of the hash in use. Signed-off-by: brian m. carlson <sandals@crustytoothpaste.net> Acked-by: Eric Wong <e@80x24.org> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-06-22t9100: make test work with SHA-256Libravatar brian m. carlson1-3/+16
Compute the relevant tree objects for SHA-256 and use those when appropriate instead of using the SHA-1 ones. Signed-off-by: brian m. carlson <sandals@crustytoothpaste.net> Acked-by: Eric Wong <e@80x24.org> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-06-22t9108: make test hash independentLibravatar brian m. carlson1-2/+2
Instead of stripping off the first 41 characters of git log output, let's just strip off the first space-separated component, which will work for any size hash. Signed-off-by: brian m. carlson <sandals@crustytoothpaste.net> Acked-by: Eric Wong <e@80x24.org> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-06-22t9168: make test hash independentLibravatar brian m. carlson1-4/+4
Instead of stripping off the first 41 characters of git log output, let's just strip off the first space-separated component, which will work for any size hash. Signed-off-by: brian m. carlson <sandals@crustytoothpaste.net> Acked-by: Eric Wong <e@80x24.org> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-06-22t9109: make test hash independentLibravatar brian m. carlson1-3/+3
Instead of stripping off the first 41 characters of git log output, let's just strip off the first space-separated component, which will work for any size hash. Signed-off-by: brian m. carlson <sandals@crustytoothpaste.net> Acked-by: Eric Wong <e@80x24.org> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-06-19remote-testgit: adapt for object-formatLibravatar brian m. carlson1-0/+6
When using an algorithm other than SHA-1, we need the remote helper to advertise support for the object-format extension and provide information back to us so that we can properly parse refs and return data. Ensure that the test remote helper understands these extensions. Signed-off-by: brian m. carlson <sandals@crustytoothpaste.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-06-19t5300: pass --object-format to git index-packLibravatar brian m. carlson1-4/+5
git index-pack by default reads the repository to determine the object format. However, when outside of a repository, it's necessary to specify the hash algorithm in use so that the pack can be properly indexed. Add an --object-format argument when invoking git index-pack outside of a repository. Signed-off-by: brian m. carlson <sandals@crustytoothpaste.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-06-19t5704: send object-format capability with SHA-256Libravatar brian m. carlson1-0/+2
When we speak protocol v2 in this test, we must pass the object-format header if the algorithm is not SHA-1. Otherwise, git upload-pack fails because the hash algorithm doesn't match and not because we've failed to speak the protocol correctly. Pass the header so that our assertions test what we're really interested in. Signed-off-by: brian m. carlson <sandals@crustytoothpaste.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-06-19t5703: use object-format serve optionLibravatar brian m. carlson1-5/+14
When we're using an algorithm other than SHA-1, we need to specify the algorithm in use so we don't get a failure with an "unknown format" message. Add a wrapper function that specifies this header if required. Skip specifying this header for SHA-1 to test that it works both with an without this header. Signed-off-by: brian m. carlson <sandals@crustytoothpaste.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-06-19t5702: offer an object-format capability in the testLibravatar brian m. carlson1-0/+2
In order to make this test work with SHA-256, offer an object-format capability so that both sides use the same algorithm. Signed-off-by: brian m. carlson <sandals@crustytoothpaste.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-06-19t/helper: initialize the repository for test-sha1-arrayLibravatar brian m. carlson1-0/+3
test-sha1-array uses the_hash_algo under the hood. Since t0064 wants to use the value that is correct for the hash algorithm that we're testing, make sure the test helper initializes the repository to set the_hash_algo correctly. Signed-off-by: brian m. carlson <sandals@crustytoothpaste.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-06-19t1050: pass algorithm to index-pack when outside repoLibravatar brian m. carlson1-1/+3
When outside a repository, git index-pack is unable to guess the hash algorithm in use for a pack, since packs don't contain any information on the algorithm in use. Pass an option to index-pack to help it out in this test. Signed-off-by: brian m. carlson <sandals@crustytoothpaste.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-06-19remote-curl: detect algorithm for dumb HTTP by sizeLibravatar brian m. carlson1-0/+18
When reading the info/refs file for a repository, we have no explicit way to detect which hash algorithm is in use because the file doesn't provide one. Detect the hash algorithm in use by the size of the first object ID. If we have an empty repository, we don't know what the hash algorithm is on the remote side, so default to whatever the local side has configured. Without doing this, we cannot clone an empty repository since we don't know its hash algorithm. Test this case appropriately, since we currently have no tests for cloning an empty repository with the dumb HTTP protocol. We anonymize the URL like elsewhere in the function in case the user has decided to include a secret in the URL. Signed-off-by: brian m. carlson <sandals@crustytoothpaste.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-06-19refs: implement reference transaction hookLibravatar Patrick Steinhardt2-0/+141
The low-level reference transactions used to update references are currently completely opaque to the user. While certainly desirable in most usecases, there are some which might want to hook into the transaction to observe all queued reference updates as well as observing the abortion or commit of a prepared transaction. One such usecase would be to have a set of replicas of a given Git repository, where we perform Git operations on all of the repositories at once and expect the outcome to be the same in all of them. While there exist hooks already for a certain subset of Git commands that could be used to implement a voting mechanism for this, many others currently don't have any mechanism for this. The above scenario is the motivation for the new "reference-transaction" hook that reaches directly into Git's reference transaction mechanism. The hook receives as parameter the current state the transaction was moved to ("prepared", "committed" or "aborted") and gets via its standard input all queued reference updates. While the exit code gets ignored in the "committed" and "aborted" states, a non-zero exit code in the "prepared" state will cause the transaction to be aborted prematurely. Given the usecase described above, a voting mechanism can now be implemented via this hook: as soon as it gets called, it will take all of stdin and use it to cast a vote to a central service. When all replicas of the repository agree, the hook will exit with zero, otherwise it will abort the transaction by returning non-zero. The most important upside is that this will catch _all_ commands writing references at once, allowing to implement strong consistency for reference updates via a single mechanism. In order to test the impact on the case where we don't have any "reference-transaction" hook installed in the repository, this commit introduce two new performance tests for git-update-refs(1). Run against an empty repository, it produces the following results: Test origin/master HEAD -------------------------------------------------------------------- 1400.2: update-ref 2.70(2.10+0.71) 2.71(2.10+0.73) +0.4% 1400.3: update-ref --stdin 0.21(0.09+0.11) 0.21(0.07+0.14) +0.0% The performance test p1400.2 creates, updates and deletes a branch a thousand times, thus averaging runtime of git-update-refs over 3000 invocations. p1400.3 instead calls `git-update-refs --stdin` three times and queues a thousand creations, updates and deletes respectively. As expected, p1400.3 consistently shows no noticeable impact, as for each batch of updates there's a single call to access(3P) for the negative hook lookup. On the other hand, for p1400.2, one can see an impact caused by this patchset. But doing five runs of the performance tests where each one was run with GIT_PERF_REPEAT_COUNT=10, the overhead ranged from -1.5% to +1.1%. These inconsistent performance numbers can be explained by the overhead of spawning 3000 processes. This shows that the overhead of assembling the hook path and executing access(3P) once to check if it's there is mostly outweighed by the operating system's overhead. Signed-off-by: Patrick Steinhardt <ps@pks.im> 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'
2020-06-17object: drop parsed_object_pool->commit_countLibravatar Abhishek Kumar1-1/+1
14ba97f8 (alloc: allow arbitrary repositories for alloc functions, 2018-05-15) introduced parsed_object_pool->commit_count to keep count of commits per repository and was used to assign commit->index. However, commit-slab code requires commit->index values to be unique and a global count would be correct, rather than a per-repo count. Let's introduce a static counter variable, `parsed_commits_count` to keep track of parsed commits so far. As commit_count has no use anymore, let's also drop it from the struct. Signed-off-by: Abhishek Kumar <abhishekkumar8222@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
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>