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2020-07-30strvec: rename struct fieldsLibravatar Jeff King1-7/+7
The "argc" and "argv" names made sense when the struct was argv_array, but now they're just confusing. Let's rename them to "nr" (which we use for counts elsewhere) and "v" (which is rather terse, but reads well when combined with typical variable names like "args.v"). Note that we have to update all of the callers immediately. Playing tricks with the preprocessor is hard here, because we wouldn't want to rewrite unrelated tokens. Signed-off-by: Jeff King <peff@peff.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-07-28strvec: fix indentation in renamed callsLibravatar Jeff King1-21/+21
Code which split an argv_array call across multiple lines, like: argv_array_pushl(&args, "one argument", "another argument", "and more", NULL); was recently mechanically renamed to use strvec, which results in mis-matched indentation like: strvec_pushl(&args, "one argument", "another argument", "and more", NULL); Let's fix these up to align the arguments with the opening paren. I did this manually by sifting through the results of: git jump grep 'strvec_.*,$' and liberally applying my editor's auto-format. Most of the changes are of the form shown above, though I also normalized a few that had originally used a single-tab indentation (rather than our usual style of aligning with the open paren). I also rewrapped a couple of obvious cases (e.g., where previously too-long lines became short enough to fit on one), but I wasn't aggressive about it. In cases broken to three or more lines, the grouping of arguments is sometimes meaningful, and it wasn't worth my time or reviewer time to ponder each case individually. Signed-off-by: Jeff King <peff@peff.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-07-28strvec: convert builtin/ callers away from argv_array nameLibravatar Jeff King1-34/+34
We eventually want to drop the argv_array name and just use strvec consistently. There's no particular reason we have to do it all at once, or care about interactions between converted and unconverted bits. Because of our preprocessor compat layer, the names are interchangeable to the compiler (so even a definition and declaration using different names is OK). This patch converts all of the files in builtin/ to keep the diff to a manageable size. The conversion was done purely mechanically with: git ls-files '*.c' '*.h' | xargs perl -i -pe ' s/ARGV_ARRAY/STRVEC/g; s/argv_array/strvec/g; ' and then selectively staging files with "git add builtin/". We'll deal with any indentation/style fallouts separately. Signed-off-by: Jeff King <peff@peff.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-07-28strvec: rename files from argv-array to strvecLibravatar Jeff King1-1/+1
This requires updating #include lines across the code-base, but that's all fairly mechanical, and was done with: git ls-files '*.c' '*.h' | xargs perl -i -pe 's/argv-array.h/strvec.h/' Signed-off-by: Jeff King <peff@peff.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-07-06Merge branch 'bc/sha-256-part-2'Libravatar Junio C Hamano1-0/+10
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 ...
2020-05-27builtin/receive-pack: detect when the server doesn't support our hashLibravatar brian m. carlson1-0/+9
Detect when the server doesn't support our hash algorithm and abort. Signed-off-by: brian m. carlson <sandals@crustytoothpaste.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-05-27remote: advertise the object-format capability on the server sideLibravatar brian m. carlson1-0/+1
Advertise the current hash algorithm in use by using the object-format capability as part of the ref advertisement. Signed-off-by: brian m. carlson <sandals@crustytoothpaste.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-05-13Merge branch 'tb/shallow-cleanup'Libravatar Junio C Hamano1-1/+2
Code cleanup. * tb/shallow-cleanup: shallow: use struct 'shallow_lock' for additional safety shallow.h: document '{commit,rollback}_shallow_file' shallow: extract a header file for shallow-related functions commit: make 'commit_graft_pos' non-static
2020-05-08Merge branch 'cb/avoid-colliding-with-netbsd-hmac'Libravatar Junio C Hamano1-3/+3
The <stdlib.h> header on NetBSD brings in its own definition of hmac() function (eek), which conflicts with our own and unrelated function with the same name. Our function has been renamed to work around the issue. * cb/avoid-colliding-with-netbsd-hmac: builtin/receive-pack: avoid generic function name hmac()
2020-05-05builtin/receive-pack: avoid generic function name hmac()Libravatar Carlo Marcelo Arenas Belón1-3/+3
fabec2c5c3 (builtin/receive-pack: switch to use the_hash_algo, 2019-08-18) renames hmac_sha1 to hmac, as it was updated to use the hash function used by git (which won't be sha1 in the future). hmac() is provided by NetBSD >= 8 libc and therefore conflicts as shown by : builtin/receive-pack.c:421:13: error: conflicting types for 'hmac' static void hmac(unsigned char *out, ^~~~ In file included from ./git-compat-util.h:172:0, from ./builtin.h:4, from builtin/receive-pack.c:1: /usr/include/stdlib.h:305:10: note: previous declaration of 'hmac' was here ssize_t hmac(const char *, const void *, size_t, const void *, size_t, void *, ^~~~ Rename it again to hmac_hash to reflect it will use the git's defined hash function and avoid the conflict, while at it update a comment to better describe the HMAC function that was used. Signed-off-by: Carlo Marcelo Arenas Belón <carenas@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-05-01Merge branch 'tb/reset-shallow'Libravatar Junio C Hamano1-2/+2
Fix in-core inconsistency after fetching into a shallow repository that broke the code to write out commit-graph. * tb/reset-shallow: shallow.c: use '{commit,rollback}_shallow_file' t5537: use test_write_lines and indented heredocs for readability
2020-04-30shallow: use struct 'shallow_lock' for additional safetyLibravatar Taylor Blau1-1/+1
In previous patches, the functions 'commit_shallow_file' and 'rollback_shallow_file' were introduced to reset the shallowness validity checks on a repository after potentially modifying '.git/shallow'. These functions can be made safer by wrapping the 'struct lockfile *' in a new type, 'shallow_lock', so that they cannot be called with a raw lock (and potentially misused by other code that happens to possess a lockfile, but has nothing to do with shallowness). This patch introduces that type as a thin wrapper around 'struct lockfile', and updates the two aforementioned functions and their callers to use it. Suggested-by: Junio C Hamano <gitster@pobox.com> Helped-by: Jonathan Nieder <jrnieder@gmail.com> Signed-off-by: Taylor Blau <me@ttaylorr.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-04-30shallow: extract a header file for shallow-related functionsLibravatar Taylor Blau1-0/+1
There are many functions in commit.h that are more related to shallow repositories than they are to any sort of generic commit machinery. Likely this began when there were only a few shallow-related functions, and commit.h seemed a reasonable enough place to put them. But, now there are a good number of shallow-related functions, and placing them all in 'commit.h' doesn't make sense. This patch extracts a 'shallow.h', which takes all of the declarations from 'commit.h' for functions which already exist in 'shallow.c'. We will bring the remaining shallow-related functions defined in 'commit.c' in a subsequent patch. For now, move only the ones that already are implemented in 'shallow.c', and update the necessary includes. Signed-off-by: Taylor Blau <me@ttaylorr.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-04-28Merge branch 'bc/constant-memequal'Libravatar Junio C Hamano1-1/+22
Validation of push certificate has been made more robust against timing attacks. * bc/constant-memequal: receive-pack: compilation fix builtin/receive-pack: use constant-time comparison for HMAC value
2020-04-24shallow.c: use '{commit,rollback}_shallow_file'Libravatar Taylor Blau1-2/+2
In bd0b42aed3 (fetch-pack: do not take shallow lock unnecessarily, 2019-01-10), the author noted that 'is_repository_shallow' produces visible side-effect(s) by setting 'is_shallow' and 'shallow_stat'. This is a problem for e.g., fetching with '--update-shallow' in a shallow repository with 'fetch.writeCommitGraph' enabled, since the update to '.git/shallow' will cause Git to think that the repository isn't shallow when it is, thereby circumventing the commit-graph compatibility check. This causes problems in shallow repositories with at least shallow refs that have at least one ancestor (since the client won't have those objects, and therefore can't take the reachability closure over commits when writing a commit-graph). Address this by introducing thin wrappers over 'commit_lock_file' and 'rollback_lock_file' for use specifically when the lock is held over '.git/shallow'. These wrappers (appropriately called 'commit_shallow_file' and 'rollback_shallow_file') call into their respective functions in 'lockfile.h', but additionally reset validity checks used by the shallow machinery. Replace each instance of 'commit_lock_file' and 'rollback_lock_file' with 'commit_shallow_file' and 'rollback_shallow_file' when the lock being held is over the '.git/shallow' file. As a result, 'prune_shallow' can now only be called once (since 'check_shallow_file_for_update' will die after calling 'reset_repository_shallow'). But, this is OK since we only call 'prune_shallow' at most once per process. Helped-by: Jonathan Tan <jonathantanmy@google.com> Helped-by: Junio C Hamano <gitster@pobox.com> Signed-off-by: Taylor Blau <me@ttaylorr.com> Reviewed-by: Jonathan Tan <jonathantanmy@google.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-04-22receive-pack: compilation fixLibravatar Junio C Hamano1-1/+3
We do not use C99 "for loop initial declaration" in our codebase (yet), but one snuck in. Reported-by: SZEDER Gábor <szeder.dev@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-04-09builtin/receive-pack: use constant-time comparison for HMAC valueLibravatar brian m. carlson1-1/+20
When we're comparing a push cert nonce, we currently do so using strcmp. Most implementations of strcmp short-circuit and exit as soon as they know whether two values are equal. This, however, is a problem when we're comparing the output of HMAC, as it leaks information in the time taken about how much of the two values match if they do indeed differ. In our case, the nonce is used to prevent replay attacks against our server via the embedded timestamp and replay attacks using requests from a different server via the HMAC. Push certs, which contain the nonces, are signed, so an attacker cannot tamper with the nonces without breaking validation of the signature. They can, of course, create their own signatures with invalid nonces, but they can also create their own signatures with valid nonces, so there's nothing to be gained. Thus, there is no security problem. Even though it doesn't appear that there are any negative consequences from the current technique, for safety and to encourage good practices, let's use a constant time comparison function for nonce verification. POSIX does not provide one, but they are easy to write. The technique we use here is also used in NaCl and the Go standard library and relies on the fact that bitwise or and xor are constant time on all known architectures. We need not be concerned about exiting early if the actual and expected lengths differ, since the standard cryptographic assumption is that everyone, including an attacker, knows the format of and algorithm used in our nonces (and in any event, they have the source code and can determine it easily). As a result, we assume everyone knows how long our nonces should be. This philosophy is also taken by the Go standard library and other cryptographic libraries when performing constant time comparisons on HMAC values. Signed-off-by: brian m. carlson <sandals@crustytoothpaste.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-03-30oid_array: rename source file from sha1-arrayLibravatar Jeff King1-1/+1
We renamed the actual data structure in 910650d2f8 (Rename sha1_array to oid_array, 2017-03-31), but the file is still called sha1-array. Besides being slightly confusing, it makes it more annoying to grep for leftover occurrences of "sha1" in various files, because the header is included in so many places. Let's complete the transition by renaming the source and header files (and fixing up a few comment references). I kept the "-" in the name, as that seems to be our style; cf. fc1395f4a4 (sha1_file.c: rename to use dash in file name, 2018-04-10). We also have oidmap.h and oidset.h without any punctuation, but those are "struct oidmap" and "struct oidset" in the code. We _could_ make this "oidarray" to match, but somehow it looks uglier to me because of the length of "array" (plus it would be a very invasive patch for little gain). Signed-off-by: Jeff King <peff@peff.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-02-24receive.denyCurrentBranch: respect all worktreesLibravatar Hariom Verma1-17/+19
The receive.denyCurrentBranch config option controls what happens if you push to a branch that is checked out into a non-bare repository. By default, it rejects it. It can be disabled via `ignore` or `warn`. Another yet trickier option is `updateInstead`. However, this setting was forgotten when the git worktree command was introduced: only the main worktree's current branch is respected. With this change, all worktrees are respected. That change also leads to revealing another bug, i.e. `receive.denyCurrentBranch = true` was ignored when pushing into a non-bare repository's unborn current branch using ref namespaces. As `is_ref_checked_out()` returns 0 which means `receive-pack` does not get into conditional statement to switch `deny_current_branch` accordingly (ignore, warn, refuse, unconfigured, updateInstead). receive.denyCurrentBranch uses the function `refs_resolve_ref_unsafe()` (called via `resolve_refdup()`) to resolve the symbolic ref HEAD, but that function fails when HEAD does not point at a valid commit. As we replace the call to `refs_resolve_ref_unsafe()` with `find_shared_symref()`, which has no problem finding the worktree for a given branch even if it is unborn yet, this bug is fixed at the same time: receive.denyCurrentBranch now also handles worktrees with unborn branches as intended even while using ref namespaces. Helped-by: Johannes Schindelin <johannes.schindelin@gmx.de> Signed-off-by: Hariom Verma <hariom18599@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2019-08-19builtin/receive-pack: replace sha1_to_hexLibravatar brian m. carlson1-4/+4
Since sha1_to_hex is limited to SHA-1, replace it with hash_to_hex. Rename several variables to indicate that they can contain any hash. Signed-off-by: brian m. carlson <sandals@crustytoothpaste.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2019-08-19builtin/receive-pack: switch to use the_hash_algoLibravatar brian m. carlson1-23/+21
The push cert code uses HMAC-SHA-1 to create a nonce. This is a secure use of SHA-1 which is not affected by its collision resistance (or lack thereof). However, it makes sense for us to use a better algorithm if one is available, one which may even be more performant. Futhermore, until we have specialized functions for computing the hex value of an arbitrary function, it simplifies the code greatly to use the same hash algorithm everywhere. Switch this code to use GIT_MAX_BLKSZ and the_hash_algo for computing the push cert nonce, and rename the hmac_sha1 function to simply "hmac". Signed-off-by: brian m. carlson <sandals@crustytoothpaste.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2019-07-19Merge branch 'jk/check-connected-with-alternates'Libravatar Junio C Hamano1-1/+0
The tips of refs from the alternate object store can be used as starting point for reachability computation now. * jk/check-connected-with-alternates: check_everything_connected: assume alternate ref tips are valid object-store.h: move for_each_alternate_ref() from transport.h
2019-07-09Merge branch 'ds/close-object-store'Libravatar Junio C Hamano1-1/+1
The commit-graph file is now part of the "files that the runtime may keep open file descriptors on, all of which would need to be closed when done with the object store", and the file descriptor to an existing commit-graph file now is closed before "gc" finalizes a new instance to replace it. * ds/close-object-store: packfile: rename close_all_packs to close_object_store packfile: close commit-graph in close_all_packs commit-graph: use raw_object_store when closing
2019-07-01object-store.h: move for_each_alternate_ref() from transport.hLibravatar Jeff King1-1/+0
There's nothing inherently transport-related about enumerating the alternate ref tips. The code has lived in transport.[ch] because the only use so far had been advertising available tips during transport. But it could be used for more, and a future patch will teach rev-list to access these refs. Let's move it alongside the other alt-odb code, declaring it in object-store.h with the implementation in sha1-file.c. This lets us drop the inclusion of transport.h from receive-pack, which perhaps shows how it was misplaced (though receive-pack is about transporting objects, transport.h is mostly about the client side). Signed-off-by: Jeff King <peff@peff.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2019-06-12packfile: rename close_all_packs to close_object_storeLibravatar Derrick Stolee1-1/+1
The close_all_packs() method is now responsible for more than just pack-files. It also closes the commit-graph and the multi-pack-index. Rename the function to be more descriptive of its larger role. The name also fits because the input parameter is a raw_object_store. Signed-off-by: Derrick Stolee <dstolee@microsoft.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2019-05-13receive-pack: drop unused "commands" from prepare_shallow_update()Libravatar Jeff King1-3/+2
We pass in the list of proposed ref updates to prepare_shallow_update(), but that function doesn't actually need it (and never has since its inception in 0a1bc12b6e4). Only its caller, update_shallow_info(), needs to look at the command list. Let's drop the unused parameter to reduce confusion. Signed-off-by: Jeff King <peff@peff.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2019-03-07Merge branch 'ab/receive-pack-use-after-free-fix'Libravatar Junio C Hamano1-8/+15
Memfix. * ab/receive-pack-use-after-free-fix: receive-pack: fix use-after-free bug
2019-02-22trace2:data: add trace2 hook classificationLibravatar Jeff Hostetler1-0/+4
Classify certain child processes as hooks. Signed-off-by: Jeff Hostetler <jeffhost@microsoft.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2019-02-20receive-pack: fix use-after-free bugLibravatar Ævar Arnfjörð Bjarmason1-8/+15
The resolve_ref_unsafe() function can, and sometimes will in the case of this codepath, return the char * passed to it to the caller. In this case we construct a strbuf, free it, and then continue using the dst_name after that free(). The code being fixed dates back to da3efdb17b ("receive-pack: detect aliased updates which can occur with symrefs", 2010-04-19). When it was originally added it didn't have this bug, it was introduced when it was subsequently modified to use strbuf in 6b01ecfe22 ("ref namespaces: Support remote repositories via upload-pack and receive-pack", 2011-07-08). This is theoretically a security issue, the C standard makes no guarantees that a value you use after free() hasn't been poked at or changed by something else on the system, but in practice modern OSs will have mapped the relevant page to this process, so nothing else would have used it. We do no further allocations between the free() and use-after-free, so we ourselves didn't corrupt or change the value. Jeff investigated that and found: "It probably would be an issue if the allocation were larger. glibc at least will use mmap()/munmap() after some cutoff[1], in which case we'd get a segfault from hitting the unmapped page. But for small allocations, it just bumps brk() and the memory is still available for further allocations after free(). [...] If you had a sufficiently large refname you might be able to trigger the bug [...]. I tried to push such a ref. I had to manually make a packed-refs file with the long name to avoid filesystem limits (though probably you could have a long a/b/c/ name on ext4). But the result can't actually be pushed, because it all has to fit into a 64k pkt-line as part of the push protocol.". An a alternative and more succinct way of implementing this would have been to do the strbuf_release() at the end of check_aliased_update() and use "goto out" instead of the early "return" statements. Hopefully this approach of using a helper instead makes it easier to follow. 1. Jeff: "Weirdly, the mmap() cutoff on my glibc system is 135168 bytes. Which is...2^17 + 2^12? 33 pages? I'm sure there's a good reason for that, but I didn't dig into it." Reported-by: 王健强 <jianqiang.wang@securitygossip.com> Helped-by: Jeff King <peff@peff.net> Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2019-01-02pack-protocol.txt: accept error packets in any contextLibravatar Masaya Suzuki1-1/+3
In the Git pack protocol definition, an error packet may appear only in a certain context. However, servers can face a runtime error (e.g. I/O error) at an arbitrary timing. This patch changes the protocol to allow an error packet to be sent instead of any packet. Without this protocol spec change, when a server cannot process a request, there's no way to tell that to a client. Since the server cannot produce a valid response, it would be forced to cut a connection without telling why. With this protocol spec change, the server can be more gentle in this situation. An old client may see these error packets as an unexpected packet, but this is not worse than having an unexpected EOF. Following this protocol spec change, the error packet handling code is moved to pkt-line.c. Implementation wise, this implementation uses pkt-line to communicate with a subprocess. Since this is not a part of Git protocol, it's possible that a packet that is not supposed to be an error packet is mistakenly parsed as an error packet. This error packet handling is enabled only for the Git pack protocol parsing code considering this. Signed-off-by: Masaya Suzuki <masayasuzuki@google.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2019-01-02Use packet_reader instead of packet_read_lineLibravatar Masaya Suzuki1-29/+31
By using and sharing a packet_reader while handling a Git pack protocol request, the same reader option is used throughout the code. This makes it easy to set a reader option to the request parsing code. Signed-off-by: Masaya Suzuki <masayasuzuki@google.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-10-30Merge branch 'jc/receive-deny-current-branch-fix'Libravatar Junio C Hamano1-3/+9
The receive.denyCurrentBranch=updateInstead codepath kicked in even when the push should have been rejected due to other reasons, such as it does not fast-forward or the update-hook rejects it, which has been corrected. * jc/receive-deny-current-branch-fix: receive: denyCurrentBranch=updateinstead should not blindly update
2018-10-19receive: denyCurrentBranch=updateinstead should not blindly updateLibravatar Junio C Hamano1-3/+9
The handling of receive.denyCurrentBranch=updateInstead was added to a switch statement that handles other values of the variable, but all the other case arms only checked a condition to reject the attempted push, or let later logic in the same function to still intervene, so that a push that does not fast-forward (which is checked after the switch statement in question) is still rejected. But the handling of updateInstead incorrectly took immediate effect, without giving other checks a chance to intervene. Instead of calling update_worktree() that causes the side effect immediately, just note the fact that we will need to call the function later, and first give other checks a chance to reject the request. After the update-hook gets a chance to reject the push (which happens as the last step in a series of checks), call update_worktree() when we earlier detected the need to. Reported-by: Rajesh Madamanchi Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-10-19Merge branch 'tb/filter-alternate-refs'Libravatar Junio C Hamano1-2/+1
When pushing into a repository that borrows its objects from an alternate object store, "git receive-pack" that responds to the push request on the other side lists the tips of refs in the alternate to reduce the amount of objects transferred. This sometimes is detrimental when the number of refs in the alternate is absurdly large, in which case the bandwidth saved in potentially fewer objects transferred is wasted in excessively large ref advertisement. The alternate refs that are advertised are now configurable with a pair of configuration variables. * tb/filter-alternate-refs: transport.c: introduce core.alternateRefsPrefixes transport.c: introduce core.alternateRefsCommand transport.c: extract 'fill_alternate_refs_command' transport: drop refnames from for_each_alternate_ref
2018-10-16Merge branch 'jk/check-everything-connected-is-long-gone'Libravatar Junio C Hamano1-1/+1
Comment fix. * jk/check-everything-connected-is-long-gone: receive-pack: update comment with check_everything_connected
2018-10-09transport: drop refnames from for_each_alternate_refLibravatar Jeff King1-2/+1
None of the current callers use the refname parameter we pass to their callbacks. In theory somebody _could_ do so, but it's actually quite weird if you think about it: it's a ref in somebody else's repository. So the name has no meaning locally, and in fact there may be duplicates if there are multiple alternates. The users of this interface really only care about seeing some ref tips, since that promises that the alternate has the full commit graph reachable from there. So let's keep the information we pass back to the bare minimum. Signed-off-by: Jeff King <peff@peff.net> Signed-off-by: Taylor Blau <me@ttaylorr.com> Acked-by: Jeff King <peff@peff.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-09-25receive-pack: update comment with check_everything_connectedLibravatar Jeff King1-1/+1
That function is now called "check_connected()", but we forgot to update this comment in 7043c7071c (check_everything_connected: use a struct with named options, 2016-07-15). Signed-off-by: Jeff King <peff@peff.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-09-24Merge branch 'en/double-semicolon-fix'Libravatar Junio C Hamano1-1/+1
Code clean-up. * en/double-semicolon-fix: Remove superfluous trailing semicolons
2018-09-17Merge branch 'jk/cocci'Libravatar Junio C Hamano1-2/+2
spatch transformation to replace boolean uses of !hashcmp() to newly introduced oideq() is added, and applied, to regain performance lost due to support of multiple hash algorithms. * jk/cocci: show_dirstat: simplify same-content check read-cache: use oideq() in ce_compare functions convert hashmap comparison functions to oideq() convert "hashcmp() != 0" to "!hasheq()" convert "oidcmp() != 0" to "!oideq()" convert "hashcmp() == 0" to hasheq() convert "oidcmp() == 0" to oideq() introduce hasheq() and oideq() coccinelle: use <...> for function exclusion
2018-09-17Merge branch 'ds/reachable'Libravatar Junio C Hamano1-0/+1
The code for computing history reachability has been shuffled, obtained a bunch of new tests to cover them, and then being improved. * ds/reachable: commit-reach: correct accidental #include of C file commit-reach: use can_all_from_reach commit-reach: make can_all_from_reach... linear commit-reach: replace ref_newer logic test-reach: test commit_contains test-reach: test can_all_from_reach_with_flags test-reach: test reduce_heads test-reach: test get_merge_bases_many test-reach: test is_descendant_of test-reach: test in_merge_bases test-reach: create new test tool for ref_newer commit-reach: move can_all_from_reach_with_flags upload-pack: generalize commit date cutoff upload-pack: refactor ok_to_give_up() upload-pack: make reachable() more generic commit-reach: move commit_contains from ref-filter commit-reach: move ref_newer from remote.c commit.h: remove method declarations commit-reach: move walk methods from commit.c
2018-09-05Remove superfluous trailing semicolonsLibravatar Elijah Newren1-1/+1
Signed-off-by: Elijah Newren <newren@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-08-29convert "oidcmp() == 0" to oideq()Libravatar Jeff King1-2/+2
Using the more restrictive oideq() should, in the long run, give the compiler more opportunities to optimize these callsites. For now, this conversion should be a complete noop with respect to the generated code. The result is also perhaps a little more readable, as it avoids the "zero is equal" idiom. Since it's so prevalent in C, I think seasoned programmers tend not to even notice it anymore, but it can sometimes make for awkward double negations (e.g., we can drop a few !!oidcmp() instances here). This patch was generated almost entirely by the included coccinelle patch. This mechanical conversion should be completely safe, because we check explicitly for cases where oidcmp() is compared to 0, which is what oideq() is doing under the hood. Note that we don't have to catch "!oidcmp()" separately; coccinelle's standard isomorphisms make sure the two are treated equivalently. I say "almost" because I did hand-edit the coccinelle output to fix up a few style violations (it mostly keeps the original formatting, but sometimes unwraps long lines). Signed-off-by: Jeff King <peff@peff.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-08-02Merge branch 'sb/object-store-lookup'Libravatar Junio C Hamano1-3/+3
lookup_commit_reference() and friends have been updated to find in-core object for a specific in-core repository instance. * sb/object-store-lookup: (32 commits) commit.c: allow lookup_commit_reference to handle arbitrary repositories commit.c: allow lookup_commit_reference_gently to handle arbitrary repositories tag.c: allow deref_tag to handle arbitrary repositories object.c: allow parse_object to handle arbitrary repositories object.c: allow parse_object_buffer to handle arbitrary repositories commit.c: allow get_cached_commit_buffer to handle arbitrary repositories commit.c: allow set_commit_buffer to handle arbitrary repositories commit.c: migrate the commit buffer to the parsed object store commit-slabs: remove realloc counter outside of slab struct commit.c: allow parse_commit_buffer to handle arbitrary repositories tag: allow parse_tag_buffer to handle arbitrary repositories tag: allow lookup_tag to handle arbitrary repositories commit: allow lookup_commit to handle arbitrary repositories tree: allow lookup_tree to handle arbitrary repositories blob: allow lookup_blob to handle arbitrary repositories object: allow lookup_object to handle arbitrary repositories object: allow object_as_type to handle arbitrary repositories tag: add repository argument to deref_tag tag: add repository argument to parse_tag_buffer tag: add repository argument to lookup_tag ...
2018-07-24Merge branch 'hs/push-cert-check-cleanup'Libravatar Junio C Hamano1-15/+2
Code clean-up. * hs/push-cert-check-cleanup: gpg-interface: make parse_gpg_output static and remove from interface header builtin/receive-pack: use check_signature from gpg-interface
2018-07-20commit.h: remove method declarationsLibravatar Derrick Stolee1-0/+1
These methods are now declared in commit-reach.h. Remove them from commit.h and add new include statements in all files that require these declarations. Signed-off-by: Derrick Stolee <dstolee@microsoft.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-07-18Merge branch 'sb/object-store-grafts'Libravatar Junio C Hamano1-1/+2
The conversion to pass "the_repository" and then "a_repository" throughout the object access API continues. * sb/object-store-grafts: commit: allow lookup_commit_graft to handle arbitrary repositories commit: allow prepare_commit_graft to handle arbitrary repositories shallow: migrate shallow information into the object parser path.c: migrate global git_path_* to take a repository argument cache: convert get_graft_file to handle arbitrary repositories commit: convert read_graft_file to handle arbitrary repositories commit: convert register_commit_graft to handle arbitrary repositories commit: convert commit_graft_pos() to handle arbitrary repositories shallow: add repository argument to is_repository_shallow shallow: add repository argument to check_shallow_file_for_update shallow: add repository argument to register_shallow shallow: add repository argument to set_alternate_shallow_file commit: add repository argument to lookup_commit_graft commit: add repository argument to prepare_commit_graft commit: add repository argument to read_graft_file commit: add repository argument to register_commit_graft commit: add repository argument to commit_graft_pos object: move grafts to object parser object-store: move object access functions to object-store.h
2018-07-11builtin/receive-pack: use check_signature from gpg-interfaceLibravatar Henning Schild1-15/+2
The combination of verify_signed_buffer followed by parse_gpg_output is available as check_signature. Use that instead of implementing it again. Signed-off-by: Henning Schild <henning.schild@siemens.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-06-29object: add repository argument to parse_objectLibravatar Stefan Beller1-3/+3
Add a repository argument to allow the callers of parse_object to be more specific about which repository to act on. This is a small mechanical change; it doesn't change the implementation to handle repositories other than the_repository yet. As with the previous commits, use a macro to catch callers passing a repository other than the_repository at compile time. Signed-off-by: Jonathan Nieder <jrnieder@gmail.com> Signed-off-by: Stefan Beller <sbeller@google.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-06-29Merge branch 'sb/object-store-grafts' into sb/object-store-lookupLibravatar Junio C Hamano1-1/+2
* sb/object-store-grafts: commit: allow lookup_commit_graft to handle arbitrary repositories commit: allow prepare_commit_graft to handle arbitrary repositories shallow: migrate shallow information into the object parser path.c: migrate global git_path_* to take a repository argument cache: convert get_graft_file to handle arbitrary repositories commit: convert read_graft_file to handle arbitrary repositories commit: convert register_commit_graft to handle arbitrary repositories commit: convert commit_graft_pos() to handle arbitrary repositories shallow: add repository argument to is_repository_shallow shallow: add repository argument to check_shallow_file_for_update shallow: add repository argument to register_shallow shallow: add repository argument to set_alternate_shallow_file commit: add repository argument to lookup_commit_graft commit: add repository argument to prepare_commit_graft commit: add repository argument to read_graft_file commit: add repository argument to register_commit_graft commit: add repository argument to commit_graft_pos object: move grafts to object parser object-store: move object access functions to object-store.h
2018-05-30Merge branch 'bc/object-id'Libravatar Junio C Hamano1-4/+4
Conversion from uchar[20] to struct object_id continues. * bc/object-id: (42 commits) merge-one-file: compute empty blob object ID add--interactive: compute the empty tree value Update shell scripts to compute empty tree object ID sha1_file: only expose empty object constants through git_hash_algo dir: use the_hash_algo for empty blob object ID sequencer: use the_hash_algo for empty tree object ID cache-tree: use is_empty_tree_oid sha1_file: convert cached object code to struct object_id builtin/reset: convert use of EMPTY_TREE_SHA1_BIN builtin/receive-pack: convert one use of EMPTY_TREE_SHA1_HEX wt-status: convert two uses of EMPTY_TREE_SHA1_HEX submodule: convert several uses of EMPTY_TREE_SHA1_HEX sequencer: convert one use of EMPTY_TREE_SHA1_HEX merge: convert empty tree constant to the_hash_algo builtin/merge: switch tree functions to use object_id builtin/am: convert uses of EMPTY_TREE_SHA1_BIN to the_hash_algo sha1-file: add functions for hex empty tree and blob OIDs builtin/receive-pack: avoid hard-coded constants for push certs diff: specify abbreviation size in terms of the_hash_algo upload-pack: replace use of several hard-coded constants ...