path: root/Documentation/technical/api-submodule-config.txt
AgeCommit message (Collapse)Author
2016-11-22submodule-config: clarify parsing of null_sha1 elementStefan Beller
Signed-off-by: Stefan Beller <> Signed-off-by: Junio C Hamano <> Reviewed-by: Brandon Williams <> Signed-off-by: Junio C Hamano <>
2016-11-22submodule-config: rename commit_sha1 to treeish_nameStefan Beller
It is also possible to pass in any treeish name to lookup a submodule config. Make it clear by naming the variables accordingly. Looking up a submodule config by tree hash will come in handy in a later patch. Signed-off-by: Stefan Beller <> Reviewed-by: Brandon Williams <> Signed-off-by: Junio C Hamano <>
2015-08-19submodule: use new config API for worktree configurationsHeiko Voigt
We remove the extracted functions and directly parse into and read out of the cache. This allows us to have one unified way of accessing submodule configuration values specific to single submodules. Regardless whether we need to access a configuration from history or from the worktree. Signed-off-by: Heiko Voigt <> Signed-off-by: Junio C Hamano <> Signed-off-by: Stefan Beller <> Signed-off-by: Junio C Hamano <>
2015-08-19submodule: implement a config API for lookup of .gitmodules valuesHeiko Voigt
In a superproject some commands need to interact with submodules. They need to query values from the .gitmodules file either from the worktree of from certain revisions. At the moment this is quite hard since a caller would need to read the .gitmodules file from the history and then parse the values. We want to provide an API for this so we have one place to get values from .gitmodules from any revision (including the worktree). The API is realized as a cache which allows us to lazily read .gitmodules configurations by commit into a runtime cache which can then be used to easily lookup values from it. Currently only the values for path or name are stored but it can be extended for any value needed. It is expected that .gitmodules files do not change often between commits. Thats why we lookup the .gitmodules sha1 from a commit and then either lookup an already parsed configuration or parse and cache an unknown one for each sha1. The cache is lazily build on demand for each requested commit. This cache can be used for all purposes which need knowledge about submodule configurations. Example use cases are: * Recursive submodule checkout needs to lookup a submodule name from its path when a submodule first appears. This needs be done before this configuration exists in the worktree. * The implementation of submodule support for 'git archive' needs to lookup the submodule name to generate the archive when given a revision that is not checked out. * 'git fetch' when given the --recurse-submodules=on-demand option (or configuration) needs to lookup submodule names by path from the database rather than reading from the worktree. For new submodule it needs to lookup the name from its path to allow cloning new submodules into the .git folder so they can be checked out without any network interaction when the user does a checkout of that revision. Signed-off-by: Heiko Voigt <> Signed-off-by: Stefan Beller <> Signed-off-by: Junio C Hamano <>