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* environment: move `set_git_dir()` and related into setup layerPatrick Steinhardt2024-09-121-0/+3
| | | | | | | | | | | The functions `set_git_dir()` and friends are used to set up repositories. As such, they are quite clearly part of the setup subsystem, but still live in "environment.c". Move them over, which also helps to get rid of dependencies on `the_repository` in the environment subsystem. Signed-off-by: Patrick Steinhardt <ps@pks.im> Signed-off-by: Junio C Hamano <gitster@pobox.com>
* environment: make `get_git_dir()` accept a repositoryPatrick Steinhardt2024-09-121-1/+1
| | | | | | | | | | | The `get_git_dir()` function retrieves the path to the Git directory for `the_repository`. Make it accept a `struct repository` such that it can work on arbitrary repositories and make it part of the repository subsystem. This reduces our reliance on `the_repository` and clarifies scope. Signed-off-by: Patrick Steinhardt <ps@pks.im> Signed-off-by: Junio C Hamano <gitster@pobox.com>
* refs: convert ref storage format to an enumPatrick Steinhardt2024-06-061-4/+5
| | | | | | | | | | | The ref storage format is tracked as a simple unsigned integer, which makes it harder than necessary to discover what that integer actually is or where its values are defined. Convert the ref storage format to instead be an enum. Signed-off-by: Patrick Steinhardt <ps@pks.im> Signed-off-by: Junio C Hamano <gitster@pobox.com>
* Sync with 2.44.1Johannes Schindelin2024-04-291-0/+14
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * maint-2.44: (41 commits) Git 2.44.1 Git 2.43.4 Git 2.42.2 Git 2.41.1 Git 2.40.2 Git 2.39.4 fsck: warn about symlink pointing inside a gitdir core.hooksPath: add some protection while cloning init.templateDir: consider this config setting protected clone: prevent hooks from running during a clone Add a helper function to compare file contents init: refactor the template directory discovery into its own function find_hook(): refactor the `STRIP_EXTENSION` logic clone: when symbolic links collide with directories, keep the latter entry: report more colliding paths t5510: verify that D/F confusion cannot lead to an RCE submodule: require the submodule path to contain directories only clone_submodule: avoid using `access()` on directories submodules: submodule paths must not contain symlinks clone: prevent clashing git dirs when cloning submodule in parallel ...
| * Sync with 2.43.4Johannes Schindelin2024-04-191-0/+14
| |\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * maint-2.43: (40 commits) Git 2.43.4 Git 2.42.2 Git 2.41.1 Git 2.40.2 Git 2.39.4 fsck: warn about symlink pointing inside a gitdir core.hooksPath: add some protection while cloning init.templateDir: consider this config setting protected clone: prevent hooks from running during a clone Add a helper function to compare file contents init: refactor the template directory discovery into its own function find_hook(): refactor the `STRIP_EXTENSION` logic clone: when symbolic links collide with directories, keep the latter entry: report more colliding paths t5510: verify that D/F confusion cannot lead to an RCE submodule: require the submodule path to contain directories only clone_submodule: avoid using `access()` on directories submodules: submodule paths must not contain symlinks clone: prevent clashing git dirs when cloning submodule in parallel t7423: add tests for symlinked submodule directories ...
| | * Sync with 2.41.1Johannes Schindelin2024-04-191-0/+14
| | |\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * maint-2.41: (38 commits) Git 2.41.1 Git 2.40.2 Git 2.39.4 fsck: warn about symlink pointing inside a gitdir core.hooksPath: add some protection while cloning init.templateDir: consider this config setting protected clone: prevent hooks from running during a clone Add a helper function to compare file contents init: refactor the template directory discovery into its own function find_hook(): refactor the `STRIP_EXTENSION` logic clone: when symbolic links collide with directories, keep the latter entry: report more colliding paths t5510: verify that D/F confusion cannot lead to an RCE submodule: require the submodule path to contain directories only clone_submodule: avoid using `access()` on directories submodules: submodule paths must not contain symlinks clone: prevent clashing git dirs when cloning submodule in parallel t7423: add tests for symlinked submodule directories has_dir_name(): do not get confused by characters < '/' docs: document security issues around untrusted .git dirs ...
| | | * Sync with 2.40.2Johannes Schindelin2024-04-191-0/+14
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * maint-2.40: (39 commits) Git 2.40.2 Git 2.39.4 fsck: warn about symlink pointing inside a gitdir core.hooksPath: add some protection while cloning init.templateDir: consider this config setting protected clone: prevent hooks from running during a clone Add a helper function to compare file contents init: refactor the template directory discovery into its own function find_hook(): refactor the `STRIP_EXTENSION` logic clone: when symbolic links collide with directories, keep the latter entry: report more colliding paths t5510: verify that D/F confusion cannot lead to an RCE submodule: require the submodule path to contain directories only clone_submodule: avoid using `access()` on directories submodules: submodule paths must not contain symlinks clone: prevent clashing git dirs when cloning submodule in parallel t7423: add tests for symlinked submodule directories has_dir_name(): do not get confused by characters < '/' docs: document security issues around untrusted .git dirs upload-pack: disable lazy-fetching by default ...
| | * | Merge branch 'ds/scalar-updates' into maint-2.42Junio C Hamano2023-11-021-3/+32
| | |\ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Scalar updates. * ds/scalar-updates: scalar reconfigure: help users remove buggy repos setup: add discover_git_directory_reason() scalar: add --[no-]src option
* | | \ \ Merge branch 'eb/hash-transition'Junio C Hamano2024-03-281-0/+1
|\ \ \ \ \ | |/ / / / |/| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Work to support a repository that work with both SHA-1 and SHA-256 hash algorithms has started. * eb/hash-transition: (30 commits) t1016-compatObjectFormat: add tests to verify the conversion between objects t1006: test oid compatibility with cat-file t1006: rename sha1 to oid test-lib: compute the compatibility hash so tests may use it builtin/ls-tree: let the oid determine the output algorithm object-file: handle compat objects in check_object_signature tree-walk: init_tree_desc take an oid to get the hash algorithm builtin/cat-file: let the oid determine the output algorithm rev-parse: add an --output-object-format parameter repository: implement extensions.compatObjectFormat object-file: update object_info_extended to reencode objects object-file-convert: convert commits that embed signed tags object-file-convert: convert commit objects when writing object-file-convert: don't leak when converting tag objects object-file-convert: convert tag objects when writing object-file-convert: add a function to convert trees between algorithms object: factor out parse_mode out of fast-import and tree-walk into in object.h cache: add a function to read an OID of a specific algorithm tag: sign both hashes commit: export add_header_signature to support handling signatures on tags ...
| * | | | repository: implement extensions.compatObjectFormatbrian m. carlson2023-10-021-0/+1
| |/ / / | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Add a configuration option to enable updating and reading from compatibility hash maps when git accesses the reposotiry. Call the helper function repo_set_compat_hash_algo with the value that compatObjectFormat is set to. Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
* | | | setup: introduce "extensions.refStorage" extensionPatrick Steinhardt2024-01-021-1/+3
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Introduce a new "extensions.refStorage" extension that allows us to specify the ref storage format used by a repository. For now, the only supported format is the "files" format, but this list will likely soon be extended to also support the upcoming "reftable" format. There have been discussions on the Git mailing list in the past around how exactly this extension should look like. One alternative [1] that was discussed was whether it would make sense to model the extension in such a way that backends are arbitrarily stackable. This would allow for a combined value of e.g. "loose,packed-refs" or "loose,reftable", which indicates that new refs would be written via "loose" files backend and compressed into "packed-refs" or "reftable" backends, respectively. It is arguable though whether this flexibility and the complexity that it brings with it is really required for now. It is not foreseeable that there will be a proliferation of backends in the near-term future, and the current set of existing formats and formats which are on the horizon can easily be configured with the much simpler proposal where we have a single value, only. Furthermore, if we ever see that we indeed want to gain the ability to arbitrarily stack the ref formats, then we can adapt the current extension rather easily. Given that Git clients will refuse any unknown value for the "extensions.refStorage" extension they would also know to ignore a stacked "loose,packed-refs" in the future. So let's stick with the easy proposal for the time being and wire up the extension. [1]: <pull.1408.git.1667846164.gitgitgadget@gmail.com> Signed-off-by: Patrick Steinhardt <ps@pks.im> Signed-off-by: Junio C Hamano <gitster@pobox.com>
* | | | setup: start tracking ref storage formatPatrick Steinhardt2024-01-021-1/+5
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | In order to discern which ref storage format a repository is supposed to use we need to start setting up and/or discovering the format. This needs to happen in two separate code paths. - The first path is when we create a repository via `init_db()`. When we are re-initializing a preexisting repository we need to retain the previously used ref storage format -- if the user asked for a different format then this indicates an error and we error out. Otherwise we either initialize the repository with the format asked for by the user or the default format, which currently is the "files" backend. - The second path is when discovering repositories, where we need to read the config of that repository. There is not yet any way to configure something other than the "files" backend, so we can just blindly set the ref storage format to this backend. Wire up this logic so that we have the ref storage format always readily available when needed. As there is only a single backend and because it is not configurable we cannot yet verify that this tracking works as expected via tests, but tests will be added in subsequent commits. To countermand this ommission now though, raise a BUG() in case the ref storage format is not set up properly in `ref_store_init()`. Signed-off-by: Patrick Steinhardt <ps@pks.im> Signed-off-by: Junio C Hamano <gitster@pobox.com>
* | | | builtin/clone: create the refdb with the correct object formatPatrick Steinhardt2023-12-121-0/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | We're currently creating the reference database with a potentially incorrect object format when the remote repository's object format is different from the local default object format. This works just fine for now because the files backend never records the object format anywhere. But this logic will fail with any new reference backend that encodes this information in some form either on-disk or in-memory. The preceding commits have reshuffled code in git-clone(1) so that there is no code path that will access the reference database before we have detected the remote's object format. With these refactorings we can now defer initialization of the reference database until after we have learned the remote's object format and thus initialize it with the correct format from the get-go. These refactorings are required to make git-clone(1) work with the upcoming reftable backend when cloning repositories with the SHA256 object format. This change breaks a test in "t5550-http-fetch-dumb.sh" when cloning an empty repository with `GIT_TEST_DEFAULT_HASH=sha256`. The test expects the resulting hash format of the empty cloned repository to match the default hash, but now we always end up with a sha1 repository. The problem is that for dumb HTTP fetches, we have no easy way to figure out the remote's hash function except for deriving it based on the hash length of refs in `info/refs`. But as the remote repository is empty we cannot rely on this detection mechanism. Before the change in this commit we already initialized the repository with the default hash function and then left it as-is. With this patch we always use the hash function detected via the remote, where we fall back to "sha1" in case we cannot detect it. Neither the old nor the new behaviour are correct as we second-guess the remote hash function in both cases. But given that this is a rather unlikely edge case (we use the dumb HTTP protocol, the remote repository uses SHA256 and the remote repository is empty), let's simply adapt the test to assert the new behaviour. If we want to properly address this edge case in the future we will have to extend the dumb HTTP protocol so that we can properly detect the hash function for empty repositories. Signed-off-by: Patrick Steinhardt <ps@pks.im> Signed-off-by: Junio C Hamano <gitster@pobox.com>
* | | | setup: allow skipping creation of the refdbPatrick Steinhardt2023-12-121-2/+3
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Allow callers to skip creation of the reference database via a new flag `INIT_DB_SKIP_REFDB`, which is required for git-clone(1) so that we can create it at a later point once the object format has been discovered from the remote repository. Note that we also uplift the call to `create_reference_database()` into `init_db()`, which makes it easier to handle the new flag for us. This changes the order in which we do initialization so that we now set up the Git configuration before we create the reference database. In practice this move should not result in any change in behaviour. Signed-off-by: Patrick Steinhardt <ps@pks.im> Signed-off-by: Junio C Hamano <gitster@pobox.com>
* | | | Merge branch 'ds/scalar-updates'Junio C Hamano2023-08-291-3/+32
|\ \ \ \ | |/ / / |/| / / | |/ / | | | | | | | | | | | | | | | Scalar updates. * ds/scalar-updates: scalar reconfigure: help users remove buggy repos setup: add discover_git_directory_reason() scalar: add --[no-]src option
| * / setup: add discover_git_directory_reason()Derrick Stolee2023-08-281-3/+32
| |/ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | There are many reasons why discovering a Git directory may fail. In particular, 8959555cee7 (setup_git_directory(): add an owner check for the top-level directory, 2022-03-02) added ownership checks as a security precaution. Callers attempting to set up a Git directory may want to inform the user about the reason for the failure. For that, expose the enum discovery_result from within setup.c and move it into cache.h where discover_git_directory() is defined. I initially wanted to change the return type of discover_git_directory() to be this enum, but several callers rely upon the "zero means success". The two problems with this are: 1. The zero value of the enum is actually GIT_DIR_NONE, so nonpositive results are errors. 2. There are multiple successful states; positive results are successful. It is worth noting that GIT_DIR_NONE is not returned, so we remove this option from the enum. We must be careful to keep the successful reasons as positive values, so they are given explicit positive values. Instead of updating all callers immediately, add a new method, discover_git_directory_reason(), and convert discover_git_directory() to be a thin shim on top of it. One thing that is important to note is that discover_git_directory() previously returned -1 on error, so let's continue that into the future. There is only one caller (in scalar.c) that depends on that signedness instead of a non-zero check, so clean that up, too. Because there are extra checks that discover_git_directory_reason() does after setup_git_directory_gently_1(), there are other modes that can be returned for failure states. Add these modes to the enum, but be sure to explicitly add them as BUG() states in the switch of setup_git_directory_gently(). Signed-off-by: Derrick Stolee <derrickstolee@github.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
* / setup: adopt shared init-db & clone codeElijah Newren2023-06-211-0/+9
|/ | | | | | | | | | | | | The functions init_db() and initialize_repository_version() were shared by builtin/init-db.c and builtin/clone.c, and declared in cache.h. Move these functions, plus their several helpers only used by these functions, to setup.[ch]. Diff best viewed with `--color-moved`. Signed-off-by: Elijah Newren <newren@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
* setup.h: move declarations for setup.c functions from cache.hElijah Newren2023-03-211-0/+168
Signed-off-by: Elijah Newren <newren@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>