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2017-07-18repo_read_index: don't discard the indexLibravatar Brandon Williams1-0/+8
Have 'repo_read_index()' behave more like the other read_index family of functions and don't discard the index if it has already been populated and instead rely on the quick return of read_index_from which has: /* istate->initialized covers both .git/index and .git/sharedindex.xxx */ if (istate->initialized) return istate->cache_nr; Signed-off-by: Brandon Williams <bmwill@google.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2017-06-23repository: enable initialization of submodulesLibravatar Brandon Williams1-0/+10
Introduce 'repo_submodule_init()' which performs initialization of a 'struct repository' as a submodule of another 'struct repository'. The resulting submodule 'struct repository' can be in one of three states: 1. The submodule is initialized and has a worktree. 2. The submodule is initialized but does not have a worktree. This would occur when the submodule's gitdir is present in the superproject's 'gitdir/modules/' directory yet the submodule has not been checked out in superproject's worktree. 3. The submodule remains uninitialized due to an error in the initialization process or there is no matching submodule at the provided path in the superproject. Signed-off-by: Brandon Williams <bmwill@google.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2017-06-23submodule-config: store the_submodule_cache in the_repositoryLibravatar Brandon Williams1-0/+4
Refactor how 'the_submodule_cache' is handled so that it can be stored inside of a repository object. Also migrate 'the_submodule_cache' to be stored in 'the_repository'. Signed-off-by: Brandon Williams <bmwill@google.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2017-06-23repository: add index_state to struct repoLibravatar Brandon Williams1-0/+9
Signed-off-by: Brandon Williams <bmwill@google.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2017-06-23config: read config from a repository objectLibravatar Brandon Williams1-0/+10
Teach the config machinery to read config information from a repository object. This involves storing a 'struct config_set' inside the repository object and adding a number of functions (repo_config*) to be able to query a repository's config. The current config API enables lazy-loading of the config. This means that when 'git_config_get_int()' is called, if the_config_set hasn't been populated yet, then it will be populated and properly initialized by reading the necessary config files (system wide .gitconfig, user's home .gitconfig, and the repository's config). To maintain this paradigm, the new API to read from a repository object's config will also perform this lazy-initialization. Since both APIs (git_config_get* and repo_config_get*) have the same semantics we can migrate the default config to be stored within 'the_repository' and just have the 'git_config_get*' family of functions redirect to the 'repo_config_get*' functions. Signed-off-by: Brandon Williams <bmwill@google.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2017-06-23repository: introduce the repository objectLibravatar Brandon Williams1-0/+64
Introduce the repository object 'struct repository' which can be used to hold all state pertaining to a git repository. Some of the benefits of object-ifying a repository are: 1. Make the code base more readable and easier to reason about. 2. Allow for working on multiple repositories, specifically submodules, within the same process. Currently the process for working on a submodule involves setting up an argv_array of options for a particular command and then launching a child process to execute the command in the context of the submodule. This is clunky and can require lots of little hacks in order to ensure correctness. Ideally it would be nice to simply pass a repository and an options struct to a command. 3. Eliminating reliance on global state will make it easier to enable the use of threading to improve performance. Signed-off-by: Brandon Williams <bmwill@google.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>