src/refs.c


Log

Author Commit Date CI Message
Edward Thomson c5d41d46 2020-08-03T09:55:22 Merge pull request #5563 from pks-t/pks/worktree-heads Access HEAD via the refdb backends
Patrick Steinhardt 5434f9a3 2020-06-17T14:57:13 refs: remove function to read HEAD directly With the last user of `git_reference__read_head` gone, let's remove it as it's been reading references without consulting the refdb backends.
Patrick Steinhardt 7216b048 2020-06-17T14:23:15 refs: update HEAD references via refdb When renaming a reference, we need to iterate over every HEAD and potentially update it in case it is a symbolic reference pointing to the previous name of the renamed reference. Most importantly, this doesn't only include HEADs from the repo we're renaming the reference in, but we also need to iterate over HEADs from linked worktrees. In order to update the HEADs, we directly read them from the worktree's gitdir and thus assume that both repository and worktrees use the filesystem-based reference backend. But this breaks as soon as one got a repository with a different refdb and breaks our own abstractions. So let's instead update HEAD references via the refdb by first opening each worktree as a repository and then using the usual functions to read and update HEADs. This is a lot less efficient than the current code, but it's not like we can really help this: going via the refdb is mandatory.
Patrick Steinhardt b895547c 2020-06-30T09:35:21 refs: replace reimplementation of reference resolver The refs code currently has a second implementation that resolves references in order to find any final symbolic reference pointing to a nonexistent target branch. As we've just extended `git_refdb_resolve` to also return such references, let's use that one instead in order to reduce code duplication.
Patrick Steinhardt cf7dd05b 2020-06-30T13:26:05 refdb: return resolved symbolic refs pointing to nonexistent refs In some cases, resolving references requires us to also know about the final symbolic reference that's pointing to a nonexistent branch, e.g. in an empty repository where the main branch is yet unborn but HEAD already points to it. Right now, the resolving logic is thus split up into two, where one is the new refdb implementation and the second one is an ad-hoc implementation inside "refs.c". Let's extend `git_refdb_resolve` to also return such final dangling references pointing to nonexistent branches so we can deduplicate the resolving logic.
Patrick Steinhardt c54f40e4 2020-06-30T09:28:12 refs: move resolving of references into the refdb Resolving of symbolic references is currently implemented inside the "refs" layer. As a result, it's hard to call this function from low-level parts that only have a refdb available, but no repository, as the "refs" layer always operates on the repository-level. So let's move the function into the generic "refdb" implementation to lift this restriction.
Patrick Steinhardt a6c9e0b3 2020-06-08T12:40:47 tree-wide: mark local functions as static We've accumulated quite some functions which are never used outside of their respective code unit, but which are lacking the `static` keyword. Add it to reduce their linkage scope and allow the compiler to optimize better.
Josh Bleecher Snyder 852c83ee 2020-01-15T13:31:21 refs: refuse to delete HEAD This requires adding a new symbolic ref to the testrepo fixture. Some of the existing tests attempt to delete HEAD, expecting a different failure. Introduce and use a non-HEAD symbolic ref instead. Adjust a few other tests as needed. Fixes #5357
Etienne Samson 97b8491b 2019-12-08T15:25:52 refs: rename git_reference__set_name to git_reference__realloc As git_reference__name will reallocate storage to account for longer names (it's actually allocator-dependent), it will cause all existing pointers to the old object to become dangling, as they now point to freed memory. Fix the issue by renaming to a more descriptive name, and pass a pointer to the actual reference that can safely be invalidated if the realloc succeeds.
Patrick Steinhardt e54343a4 2019-06-29T09:17:32 fileops: rename to "futils.h" to match function signatures Our file utils functions all have a "futils" prefix, e.g. `git_futils_touch`. One would thus naturally guess that their definitions and implementation would live in files "futils.h" and "futils.c", respectively, but in fact they live in "fileops.h". Rename the files to match expectations.
Patrick Steinhardt 658022c4 2019-07-18T13:53:41 configuration: cvar -> configmap `cvar` is an unhelpful name. Refactor its usage to `configmap` for more clarity.
Edward Thomson 5d92e547 2019-06-08T17:28:35 oid: `is_zero` instead of `iszero` The only function that is named `issomething` (without underscore) was `git_oid_iszero`. Rename it to `git_oid_is_zero` for consistency with the rest of the library.
Patrick Steinhardt 51214b85 2019-04-26T10:15:49 refs: loosen restriction on wildcard "*" refspecs In commit cd377f45c9 (refs: loosen restriction on wildcard "*" refspecs, 2015-07-22) in git.git, the restrictions on wildcard "*" refspecs has been loosened. While wildcards were previously only allowed if the component is a single "*", this was changed to also accept other patterns as part of the component. We never adapted to that change and still reject any wildcard patterns that aren't a single "*" only. Update our tests to reflect the upstream change and adjust our own code accordingly.
Patrick Steinhardt efb20825 2019-02-14T13:05:49 branches: introduce flag to skip enumeration of certain HEADs Right now, the function `git_repository_foreach_head` will always iterate over all HEADs of the main repository and its worktrees. In some cases, it might be required to skip either of those, though. Add a flag in preparation for the following commit that enables this behaviour.
Edward Thomson f673e232 2018-12-27T13:47:34 git_error: use new names in internal APIs and usage Move to the `git_error` name in the internal API for error-related functions.
Edward Thomson ed8cfbf0 2019-01-17T00:32:31 references: use new names in internal usage Update internal usage to use the `git_reference` names for constants.
Etienne Samson d9eae98b 2018-10-24T01:30:12 refs: assert that we're passed valid refs when renaming CID 1382962
Carlos Martín Nieto 5bd78c48 2018-12-14T14:41:17 refs: constify git_reference_peel We have no need to take a non-const reference. This does involve some other work to make sure we don't mix const and non-const variables, but by splitting what we want each variable to do we can also simplify the logic for when we do want to free a new reference we might have allocated.
Edward Thomson 168fe39b 2018-11-28T14:26:57 object_type: use new enumeration names Use the new object_type enumeration names within the codebase.
Etienne Samson 6e9fb040 2018-08-25T01:47:39 merge: make analysis possible against a non-HEAD reference This moves the current merge analysis code into a more generic version that can work against any reference. Also change the tests to check returned analysis values exactly.
Patrick Steinhardt ecf4f33a 2018-02-08T11:14:48 Convert usage of `git_buf_free` to new `git_buf_dispose`
Etienne Samson 5e19a7f9 2018-04-10T21:16:43 refs: preserve the owning refdb when duping reference This fixes a segfault in git_reference_owner on references returned from git_reference__read_head and git_reference_dup ones.
Patrick Steinhardt b112b1e9 2017-10-06T11:24:11 refs: do not use peeled OID if peeling to a tag If a reference stored in a packed-refs file does not directly point to a commit, tree or blob, the packed-refs file will also will include a fully-peeled OID pointing to the first underlying object of that type. If we try to peel a reference to an object, we will use that peeled OID to speed up resolving the object. As a reference for an annotated tag does not directly point to a commit, tree or blob but instead to the tag object, the packed-refs file will have an accomodating fully-peeled OID pointing to the object referenced by that tag. When we use the fully-peeled OID pointing to the referenced object when peeling, we obviously cannot peel that to the tag anymore. Fix this issue by not using the fully-peeled OID whenever we want to peel to a tag. Note that this does not include the case where we want to resolve to _any_ object type. Existing code may make use from the fact that we resolve those to commit objects instead of tag objects, even though that behaviour is inconsistent between packed and loose references. Furthermore, some tests of ours make the assumption that we in fact resolve those references to a commit.
Patrick Steinhardt 0c7f49dd 2017-06-30T13:39:01 Make sure to always include "common.h" first Next to including several files, our "common.h" header also declares various macros which are then used throughout the project. As such, we have to make sure to always include this file first in all implementation files. Otherwise, we might encounter problems or even silent behavioural differences due to macros or defines not being defined as they should be. So in fact, our header and implementation files should make sure to always include "common.h" first. This commit does so by establishing a common include pattern. Header files inside of "src" will now always include "common.h" as its first other file, separated by a newline from all the other includes to make it stand out as special. There are two cases for the implementation files. If they do have a matching header file, they will always include this one first, leading to "common.h" being transitively included as first file. If they do not have a matching header file, they instead include "common.h" as first file themselves. This fixes the outlined problems and will become our standard practice for header and source files inside of the "src/" from now on.
Patrick Steinhardt 0f642f31 2017-06-06T14:54:19 refs: properly report errors from `update_wt_heads`
Edward Thomson be343b88 2017-05-01T18:56:55 worktrees: cleanup some memory leaks Be sure to clean up looked up references. Free buffers instead of merely clearing them. Use `git__free` instead of `free`.
Patrick Steinhardt 2a485dab 2017-04-04T18:55:57 refs: update worktree HEADs when renaming branches Whenever we rename a branch, we update the repository's symbolic HEAD reference if it currently points to the branch that is to be renamed. But with the introduction of worktrees, we also have to iterate over all HEADs of linked worktrees to adjust them. Do so.
Patrick Steinhardt 5b65ac25 2017-04-05T10:43:18 refs: implement function to read references from file Currently, we only provide functions to read references directly from a repository's reference store via e.g. `git_reference_lookup`. But in some cases, we may want to read files not connected to the current repository, e.g. when looking up HEAD of connected work trees. This commit implements `git_reference__read_head`, which will read out and allocate a reference at an arbitrary path.
Richard Ipsum 1255a9ac 2017-02-26T13:34:13 Fix: make reflog include "(merge)" for merge commits This fixes issue #4094
Patrick Steinhardt 13c3bc9a 2017-01-27T14:32:23 strmap: remove GIT__USE_STRMAP macro
Edward Thomson 8d3b39a6 2017-01-21T23:50:38 Merge branch 'pr/3912'
Edward Thomson 28d0ba0b 2017-01-21T23:45:23 symbolic ref target validation: fixups Fixups requested in #3912.
Edward Thomson 909d5494 2016-12-29T12:25:15 giterr_set: consistent error messages Error messages should be sentence fragments, and therefore: 1. Should not begin with a capital letter, 2. Should not conclude with punctuation, and 3. Should not end a sentence and begin a new one
Richard Ipsum 452bf57c 2016-08-27T13:42:53 Make symbolic ref target validation optional Introduce GIT_OPT_ENABLE_SYMBOLIC_REF_TARGET_VALIDATION option. Setting this option to 0 allows validation of a symbolic ref's target to be bypassed. This option is enabled by default. This mechanism is added primarily to address a discrepancy between git behaviour and libgit2 behaviour, whereby the former allows the symbolic ref target to carry an arbitrary string and the latter does not, so: $ git symbolic-ref refs/heads/foo bar $ cat .git/refs/heads/foo ref: bar where as attempting the same via libgit2 raises an error: The given reference name 'bar' is not valid this mechanism also allows those that might want to make use of git's more lenient treatment of symbolic ref targets to do so.
Arthur Schreiber 908f24fd 2016-04-22T10:34:17 Allow creating copies of `git_reference` objects.
Carlos Martín Nieto 77965c68 2016-04-11T17:43:07 refs: provide a more general error message for dwim If we cannot dwim the input, set the error message to be explicit about that. Otherwise we leave the error for the last failed lookup, which can be rather unexpected as it mentions a remote when the user thought they were trying to look up a branch.
Edward Thomson 98c34149 2016-02-28T15:11:15 refs: honor strict object creation
Pierre-Olivier Latour 0f4d9c03 2015-06-15T09:52:40 Fixed Xcode 6.1 build warnings
Edward Thomson 78db0239 2015-03-24T20:58:00 squash some leaks
Carlos Martín Nieto fe21d708 2015-03-04T00:29:37 Plug a few leaks
Carlos Martín Nieto 4e498646 2015-01-15T16:50:31 repository: remove log message override for switching the active branch We want to use the "checkout: moving from ..." message in order to let git know when a change of branch has happened. Make the convenience functions for this goal write this message.
Carlos Martín Nieto 659cf202 2015-01-07T12:23:05 Remove the signature from ref-modifying functions The signature for the reflog is not something which changes dynamically. Almost all uses will be NULL, since we want for the repository's default identity to be used, making it noise. In order to allow for changing the identity, we instead provide git_repository_set_ident() and git_repository_ident() which allow a user to override the choice of signature.
Stefan Widgren c8e02b87 2015-02-15T21:07:05 Remove extra semicolon outside of a function Without this change, compiling with gcc and pedantic generates warning: ISO C does not allow extra ‘;’ outside of a function.
Edward Thomson f1453c59 2015-02-12T12:19:37 Make our overflow check look more like gcc/clang's Make our overflow checking look more like gcc and clang's, so that we can substitute it out with the compiler instrinsics on platforms that support it. This means dropping the ability to pass `NULL` as an out parameter. As a result, the macros also get updated to reflect this as well.
Edward Thomson 2884cc42 2015-02-11T09:39:38 overflow checking: don't make callers set oom Have the ALLOC_OVERFLOW testing macros also simply set_oom in the case where a computation would overflow, so that callers don't need to.
Edward Thomson 392702ee 2015-02-09T23:41:13 allocations: test for overflow of requested size Introduce some helper macros to test integer overflow from arithmetic and set error message appropriately.
Edward Thomson a612a25f 2014-07-18T18:22:54 git_rebase_commit: write HEAD's reflog appropriately
Carlos Martín Nieto ab8d9242 2014-06-28T06:39:38 Introduce reference transactions A transaction allows you to lock multiple references and set up changes for them before applying the changes all at once (or as close as the backend supports). This can be used for replication purposes, or for making sure some operations run when the reference is locked and thus cannot be changed.
Arthur Schreiber 824f755f 2014-05-20T17:31:53 Refs: Introduce `git_refname_t`.
Arthur Schreiber 68f9d6b2 2014-05-15T22:44:50 Refs: Fix some issue when core.precomposeunicode = true. This fixes two issues I found when core.precomposeunicode is enabled: * When creating a reference with a NFD string, the returned git_reference would return this NFD string as the reference’s name. But when looking up the reference later, the name would then be returned as NFC string. * Renaming a reference would not honor the core.precomposeunicode and apply no normalization to the new reference name.
Jacques Germishuys 3b4ba278 2014-04-03T15:50:21 Const correctness!
Carlos Martín Nieto 853b1407 2014-03-17T16:10:33 branch: constness fixes
Carlos Martín Nieto 15284a2c 2014-02-10T14:52:28 refs: move current_id before the reflog parameters Keep the reflog parameters as the last two, as they're the optional parameters.
Russell Belfer 2d929194 2014-02-07T16:14:17 Merge pull request #2099 from libgit2/bs/more-reflog-stuff More reflogness
Carlos Martín Nieto 7ee8c7e6 2014-02-05T11:07:34 refs: placeholder conditional delete We don't actually pass the old value yet.
Carlos Martín Nieto 5367ec4b 2014-02-05T12:02:52 refs: add an unconditional delete Add it under the git_reference_remove() name, letting the user pass the repo and name, analogous to unconditional setting/creation.
Carlos Martín Nieto f44fd59e 2014-02-05T11:21:14 refs: check the ref's old value when deleting Recognize when the reference has changed since we loaded it.
Carlos Martín Nieto 878fb66f 2014-02-05T10:19:17 refs: bring conditional symbolic updates to the frontend Bring the race detection goodness to symbolic references as well.
Carlos Martín Nieto 91123661 2014-02-04T22:04:00 refdb: add conditional symbolic updates Add a parameter to the backend to allow checking for the old symbolic target.
Carlos Martín Nieto 5d96fe88 2014-01-14T15:33:29 refs: changes from feedback Change the name to _matching() intead of _if(), and force _set_target() to be a conditional update. If the user doesn't care about the old value, they should use git_reference_create().
Carlos Martín Nieto 9b148098 2013-12-18T19:58:16 refs: conditional ref updates Allow updating references if the old value matches the given one.
Ben Straub 86746b4b 2014-02-03T15:06:47 Add reset tests for reflog
Arthur Schreiber 50ad7cc2 2014-02-02T18:20:06 Add `git_reference_is_note`.
Ben Straub a1710a28 2014-01-29T10:35:46 Enhance testing of signature parameters
Ben Straub ccf6ce5c 2014-01-28T11:30:36 Ensure renaming a reference updates the reflog
Ben Straub 94f263f5 2014-01-25T08:04:49 Add reflog params to set-head calls
Carlos Martín Nieto 0b28217b 2014-01-15T12:51:31 refs: remove the _with_log differentiation Any well-behaved program should write a descriptive message to the reflog whenever it updates a reference. Let's make this more prominent by removing the version without the reflog parameters.
Brodie Rao 2ad45213 2014-01-12T23:31:57 refs: handle NULL pointers passed to git_reference_iterator_free() Signed-off-by: Brodie Rao <brodie@sf.io>
Arthur Schreiber 0b795178 2014-01-02T16:58:13 Allow the log message to be NULL.
Arthur Schreiber e5994eb0 2014-01-02T16:56:09 Add missing `git_reference_symbolic_create_with_log`. It's exported in the headers, but the implementation was missing.
Vicent Marti 4e1f517c 2013-12-18T09:33:45 Merge pull request #1920 from libgit2/cmn/ref-with-log Reference operations with log
Russell Belfer 26c1cb91 2013-12-09T09:44:03 One more rename/cleanup for callback err functions
Russell Belfer f10d7a36 2013-12-06T15:53:26 Further callback error check style fixes Okay, I've decided I like the readability of this style much better so I used it everywhere.
Russell Belfer 25e0b157 2013-12-06T15:07:57 Remove converting user error to GIT_EUSER This changes the behavior of callbacks so that the callback error code is not converted into GIT_EUSER and instead we propagate the return value through to the caller. Instead of using the giterr_capture and giterr_restore functions, we now rely on all functions to pass back the return value from a callback. To avoid having a return value with no error message, the user can call the public giterr_set_str or some such function to set an error message. There is a new helper 'giterr_set_callback' that functions can invoke after making a callback which ensures that some error message was set in case the callback did not set one. In places where the sign of the callback return value is meaningful (e.g. positive to skip, negative to abort), only the negative values are returned back to the caller, obviously, since the other values allow for continuing the loop. The hardest parts of this were in the checkout code where positive return values were overloaded as meaningful values for checkout. I fixed this by adding an output parameter to many of the internal checkout functions and removing the overload. This added some code, but it is probably a better implementation. There is some funkiness in the network code where user provided callbacks could be returning a positive or a negative value and we want to rely on that to cancel the loop. There are still a couple places where an user error might get turned into GIT_EUSER there, I think, though none exercised by the tests.
Russell Belfer dab89f9b 2013-12-04T21:22:57 Further EUSER and error propagation fixes This continues auditing all the places where GIT_EUSER is being returned and making sure to clear any existing error using the new giterr_user_cancel helper. As a result, places that relied on intercepting GIT_EUSER but having the old error preserved also needed to be cleaned up to correctly stash and then retrieve the actual error. Additionally, as I encountered places where error codes were not being propagated correctly, I tried to fix them up. A number of those fixes are included in the this commit as well.
Russell Belfer 96869a4e 2013-12-03T16:45:39 Improve GIT_EUSER handling This adds giterr_user_cancel to return GIT_EUSER and clear any error message that is sitting around. As a result of using that in places, we need to be more thorough with capturing errors that happen inside a callback when used internally. To help with that, this also adds giterr_capture and giterr_restore so that when we internally use a foreach-type function that clears errors and converts them to GIT_EUSER, it is easier to restore not just the return value, but the actual error message text.
Carlos Martín Nieto f2105129 2013-11-23T14:39:53 refs: expose has_log() on the backend The frontend used to look at the file directly, but that's obviously not the right thing to do. Expose it on the backend and use that function instead.
Carlos Martín Nieto 8d5ec910 2013-11-23T14:13:01 refs: expose a way to ensure a ref has a log Sometimes (e.g. stash) we want to make sure that a log will be written, even if it's not in one of the standard locations. Let's make that easier.
Carlos Martín Nieto a57dd3b7 2013-11-13T18:15:20 reflog: integrate into the ref writing Whenever a reference is created or updated, we need to write to the reflog regardless of whether the user gave us a message, so we shouldn't leave that to the ref frontend, but integrate it into the backend. This also eliminates the race between ref update and writing to the reflog, as we protect the reflog with the ref lock. As an additional benefit, this reflog append on the backend happens by appending to the file instead of parsing and rewriting it.
Carlos Martín Nieto 110df893 2013-11-13T13:36:37 refdb: add a `message` parameter for appending to the log This is as yet unused.
Carlos Martín Nieto a6b50808 2013-10-30T17:24:36 refs: adjust to the new reflog API
nulltoken ca84e058 2013-05-14T16:40:09 refs: Introduce git_reference_symbolic_set_target_with_log()
nulltoken 14ab0e10 2013-05-14T16:07:33 refs: Introduce git_reference_set_target_with_log()
nulltoken 56ad3782 2013-05-13T17:44:39 refs: Introduce git_reference_symbolic_create_with_log()
nulltoken bba25f39 2013-05-13T16:21:09 refs: Introduce git_reference_create_with_log()
nulltoken 92f95a17 2013-05-12T14:16:13 refs: Centralize reference creation logic
Vicent Marti 0bfa7323 2013-11-01T17:07:44 iconv: Do not fake an API when iconv is not available
Ben Straub 8f4a8b09 2013-10-28T06:20:28 Merge pull request #1802 from libgit2/cmn/reflog-backend Make reflog part of refdb
Russell Belfer 74353137 2013-10-09T11:57:03 After iconv init reset ref normalize error The iconv init was accidentally clearing the default error state during reference normalization. This resets so that normalization errors will be detected correctly.
Russell Belfer 92dac975 2013-10-08T16:35:57 Make reference lookups apply precomposeunicode Before these changes, looking up a reference would return the same precomposed or decomposed form of the reference name that was used to look it up, so on MacOS which ignores the difference between the two, a single reference could be looked up either way and git_reference_name would return the form of the name that was used to look it up! This change makes lookup always return the precomposed name if core.precomposeunicode is set regardless of which version was used to look it up. The reference iterator was already returning the precomposed form from earlier work. This also updates the CMakeLists.txt rules for enabling iconv usage because the clar tests for this code were actually not being activated properly with the old version. Finally, this moves git_repository_reset_filesystem from include/ git2/repository.h to include/git2/sys/repository.h since it is not really a function that normal library users should have to think about very often.
Carlos Martín Nieto b976f3c2 2013-08-19T13:01:49 reflog: move the reflog implementation into refdb_fs References and their logs are logically coupled, let's make it so in the code by moving the fs-based reflog implementation to live next to the fs-based refs one. As part of the change, make the function take names rather than references, as only the names are relevant when looking up and handling reflogs.
Vicent Martí dbecec37 2013-08-28T09:38:14 Merge pull request #1805 from libgit2/threading-packed-load Thread safety for the refdb_fs
Nikolai Vladimirov 504850cd 2013-08-25T15:59:50 refs: add git_reference_is_tag
Russell Belfer 24c71f14 2013-08-21T14:10:27 Add internal ref set_name fn instead of realloc The refdb_fs implementation calls realloc directly on a reference object when it wants to rename it. It is not a public object, so this doesn't mess with the immutability of references, but it does assume certain constraints on the reference representation. This commit wraps that assumption in an isolated API to isolate it.
Russell Belfer 114f5a6c 2013-06-10T10:10:39 Reorganize diff and add basic diff driver This is a significant reorganization of the diff code to break it into a set of more clearly distinct files and to document the new organization. Hopefully this will make the diff code easier to understand and to extend. This adds a new `git_diff_driver` object that looks of diff driver information from the attributes and the config so that things like function content in diff headers can be provided. The full driver spec is not implemented in the commit - this is focused on the reorganization of the code and putting the driver hooks in place. This also removes a few #includes from src/repository.h that were overbroad, but as a result required extra #includes in a variety of places since including src/repository.h no longer results in pulling in the whole world.
Vicent Martí 947fad4f 2013-06-03T09:28:58 Merge pull request #1624 from libgit2/vmg/full-ref-iterator Breaking RefDB changes
Vicent Martí 9afc5971 2013-05-31T03:09:38 Merge pull request #1559 from carlosmn/ref-shorthand Introduce git_reference_shorthand
Vicent Marti 979f75d8 2013-05-30T17:19:43 Refcounting
Vicent Marti 4e6e2ff2 2013-05-30T03:47:10 ...Aaaand this works
Vicent Marti ec24e542 2013-05-29T22:47:37 What are the chances, really