kernel/git - git - PowerEL Git System

Tree: 070d276cc1

Author	SHA1	Message	Date
Junio C Hamano	7bc70a590d	cache-tree.c: typefix Signed-off-by: Junio C Hamano <junkio@cox.net>	19 years ago
Junio C Hamano	2956dd3bd7	cache_tree_update: give an option to update cache-tree only. When the extra "dryrun" parameter is true, cache_tree_update() recomputes the invalid entry but does not actually creates new tree object. Signed-off-by: Junio C Hamano <junkio@cox.net>	19 years ago
Junio C Hamano	7927a55d5b	read-tree: teach 1-way merege and plain read to prime cache-tree. This teaches read-tree to fully populate valid cache-tree when reading a tree from scratch, or reading a single tree into an existing index, reusing only the cached stat information (i.e. one-way merge). We have already taught update-index about cache-tree, so "git checkout" followed by updates to a few path followed by a "git commit" would become very efficient. Signed-off-by: Junio C Hamano <junkio@cox.net>	19 years ago
Junio C Hamano	61fa30972c	cache-tree: sort the subtree entries. Not that this makes practical performance difference; the kernel tree for example has 200 or so directories that have subdirectory, and the largest ones have 57 of them (fs and drivers). With a test to apply 600 patches with git-apply and git-write-tree, this did not make more than one per-cent of a difference, but it is a good cleanup. Signed-off-by: Junio C Hamano <junkio@cox.net>	19 years ago
Junio C Hamano	bad68ec924	index: make the index file format extensible. ... and move the cache-tree data into it. Signed-off-by: Junio C Hamano <junkio@cox.net>	19 years ago
Junio C Hamano	dd0c34c46b	cache-tree: protect against "git prune". We reused the cache-tree data without verifying the tree object still exists. Recompute in cache_tree_update() an otherwise valid cache-tree entry when the tree object disappeared. This is not usually a problem, but theoretically without this fix things can break when the user does something like this: - read-index from a side branch - write-tree the result - remove the side branch with "git branch -D" - remove the unreachable objects with "git prune" - write-tree what is in the index. Signed-off-by: Junio C Hamano <junkio@cox.net>	19 years ago
Junio C Hamano	749864627c	Add cache-tree. The cache_tree data structure is to cache tree object names that would result from the current index file. The idea is to have an optional file to record each tree object name that corresponds to a directory path in the cache when we run write_cache(), and read it back when we run read_cache(). During various index manupulations, we selectively invalidate the parts so that the next write-tree can bypass regenerating tree objects for unchanged parts of the directory hierarchy. We could perhaps make the cache-tree data an optional part of the index file, but that would involve the index format updates, so unless we need it for performance reasons, the current plan is to use a separate file, $GIT_DIR/index.aux to store this information and link it with the index file with the checksum that is already used for index file integrity check. Signed-off-by: Junio C Hamano <junkio@cox.net>	19 years ago

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