… being passed
…git_object is met
This adds support for a bunch of core.* settings that affect diff and status, plus fixes up some incorrect implementations of those settings from before. Also, this cleans up the handling of config settings in the new submodules code and in the old attrs/ignore code.
When processing status for a newly checked out repo, it is possible that there will be submodules that have not yet been initialized. The only way to distinguish these from untracked directories is to have some knowledge of submodules. This commit adds a new submodule API which, given a name or path, can determine if it appears to be a submodule and can give information about the submodule.
There was an error in the tree iterator where it would delete two tree levels instead of just one when popping up a tree level. Unfortunately the test data for the tree iterator did not have any deep trees with subtrees in the middle of the tree items, so this problem went unnoticed. This contains the 1-line fix plus new test data and tests that reveal the issue.
This gives `git_status_foreach()` back its old behavior of emulating the "--untracked=all" behavior of git. You can get any of the various --untracked options by passing flags to `git_status_foreach_ext()` but the basic version will keep the behavior it has always had.
This fixes the bug that @nulltoken found (thank you!) where if there were untracked directories alphabetically after the last tracked item, the diff implementation would deref a NULL pointer. The fix involved the code which decides if it is necessary to recurse into a directory in the working dir, so it was easy to add a new option `GIT_STATUS_OPT_RECURSE_UNTRACKED_DIRS` to control if the contents of untracked directories should be included in status.
This "fixes" the broken t18 status tests to accurately reflect the new behavior for "created" untracked subdirectories. See discussion in the PR for more details. This also contains the submodules unit test that I forgot to git add, and ports most of the t18-status.c tests to clar (still missing a couple of the git_status_file() single file tests).