Update a submodule. This will clone a missing submodule and
checkout the subrepository to the commit specified in the index of
the containing repository. If the submodule repository doesn't contain
the target commit (e.g. because fetchRecurseSubmodules isn't set), then
the submodule is fetched using the fetch options supplied in options.
@param submodule Submodule object
@param init If the submodule is not initialized, setting this flag to true
will initialize the submodule before updating. Otherwise, this will
return an error if attempting to update an uninitialzed repository.
but setting this to true forces them to be updated.
@param options configuration options for the update. If null, the
function works as though GIT_SUBMODULE_UPDATE_OPTIONS_INIT was passed.
@return 0 on success, any non-zero return value from a callback
function, or a negative value to indicate an error (use
git_error_last for a detailed error message).
Update a submodule. This will clone a missing submodule and checkout the subrepository to the commit specified in the index of the containing repository. If the submodule repository doesn't contain the target commit (e.g. because fetchRecurseSubmodules isn't set), then the submodule is fetched using the fetch options supplied in options.
@param submodule Submodule object @param init If the submodule is not initialized, setting this flag to true will initialize the submodule before updating. Otherwise, this will return an error if attempting to update an uninitialzed repository. but setting this to true forces them to be updated. @param options configuration options for the update. If null, the function works as though GIT_SUBMODULE_UPDATE_OPTIONS_INIT was passed. @return 0 on success, any non-zero return value from a callback function, or a negative value to indicate an error (use git_error_last for a detailed error message).