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2009-07-14Improve on the 'invalid object' error message at commit timeLibravatar Linus Torvalds1-1/+2
Not that anybody should ever get it, but somebody did (probably because of a flaky filesystem, but whatever). And each time I see an error message that I haven't seen before, I decide that next time it will look better. So this makes us write more relevant information about exactly which file ended up having issues with a missing object. Which will tell whether it was a tree object, for example, or just a regular file in the index (and which one). Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2009-05-25Optimize "diff-index --cached" using cache-treeLibravatar Junio C Hamano1-0/+32
When running "diff-index --cached" after making a change to only a small portion of the index, there is no point unpacking unchanged subtrees into the index recursively, only to find that all entries match anyway. Tweak unpack_trees() logic that is used to read in the tree object to catch the case where the tree entry we are looking at matches the index as a whole by looking at the cache-tree. As an exercise, after modifying a few paths in the kernel tree, here are a few numbers on my Athlon 64X2 3800+: (without patch, hot cache) $ /usr/bin/time git diff --cached --raw :100644 100644 b57e1f5... e69de29... M Makefile :100644 000000 8c86b72... 0000000... D arch/x86/Makefile :000000 100644 0000000... e69de29... A arche 0.07user 0.02system 0:00.09elapsed 102%CPU (0avgtext+0avgdata 0maxresident)k 0inputs+0outputs (0major+9407minor)pagefaults 0swaps (with patch, hot cache) $ /usr/bin/time ../git.git/git-diff --cached --raw :100644 100644 b57e1f5... e69de29... M Makefile :100644 000000 8c86b72... 0000000... D arch/x86/Makefile :000000 100644 0000000... e69de29... A arche 0.02user 0.00system 0:00.02elapsed 103%CPU (0avgtext+0avgdata 0maxresident)k 0inputs+0outputs (0major+2446minor)pagefaults 0swaps Cold cache numbers are very impressive, but it does not matter very much in practice: (without patch, cold cache) $ su root sh -c 'echo 3 >/proc/sys/vm/drop_caches' $ /usr/bin/time git diff --cached --raw :100644 100644 b57e1f5... e69de29... M Makefile :100644 000000 8c86b72... 0000000... D arch/x86/Makefile :000000 100644 0000000... e69de29... A arche 0.06user 0.17system 0:10.26elapsed 2%CPU (0avgtext+0avgdata 0maxresident)k 247032inputs+0outputs (1172major+8237minor)pagefaults 0swaps (with patch, cold cache) $ su root sh -c 'echo 3 >/proc/sys/vm/drop_caches' $ /usr/bin/time ../git.git/git-diff --cached --raw :100644 100644 b57e1f5... e69de29... M Makefile :100644 000000 8c86b72... 0000000... D arch/x86/Makefile :000000 100644 0000000... e69de29... A arche 0.02user 0.01system 0:01.01elapsed 3%CPU (0avgtext+0avgdata 0maxresident)k 18440inputs+0outputs (79major+2369minor)pagefaults 0swaps This of course helps "git status" as well. (without patch, hot cache) $ /usr/bin/time ../git.git/git-status >/dev/null 0.17user 0.18system 0:00.35elapsed 100%CPU (0avgtext+0avgdata 0maxresident)k 0inputs+5336outputs (0major+10970minor)pagefaults 0swaps (with patch, hot cache) $ /usr/bin/time ../git.git/git-status >/dev/null 0.10user 0.16system 0:00.27elapsed 99%CPU (0avgtext+0avgdata 0maxresident)k 0inputs+5336outputs (0major+3921minor)pagefaults 0swaps Signed-off-by: Junio C Hamano <gitster@pobox.com>
2009-05-25cache-tree.c::cache_tree_find(): simplify internal APILibravatar Junio C Hamano1-0/+2
Earlier cache_tree_find() needs to be called with a valid cache_tree, but repeated look-up may find an invalid or missing cache_tree in between. Help simplify the callers by returning NULL to mean "nothing appropriate found" when the input is NULL. Signed-off-by: Junio C Hamano <gitster@pobox.com>
2009-05-20write-tree --ignore-cache-treeLibravatar Junio C Hamano1-3/+7
This allows you to discard the cache-tree information before writing the tree out of the index (i.e. it always recomputes the tree object names for all the subtrees). This is only useful as a debug option, so I did not bother documenting it. Signed-off-by: Junio C Hamano <gitster@pobox.com>
2009-04-20Move prime_cache_tree() to cache-tree.cLibravatar Junio C Hamano1-0/+34
The interface to build cache-tree belongs there. Signed-off-by: Junio C Hamano <gitster@pobox.com>
2008-11-30git add --intent-to-add: do not let an empty blob be committed by accidentLibravatar Junio C Hamano1-3/+7
Writing a tree out of an index with an "intent to add" entry is blocked. This implies that you cannot "git commit" from such a state; however you can still do "git commit -a" or "git commit $that_path". Signed-off-by: Junio C Hamano <gitster@pobox.com>
2008-07-16cache-tree.c: make cache_tree_find() staticLibravatar Nanako Shiraishi1-1/+1
This function is not used by any other file. Signed-off-by: Nanako Shiraishi <nanako3@lavabit.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2008-04-24Merge branch 'maint-1.5.4' into maintLibravatar Junio C Hamano1-2/+5
* maint-1.5.4: t5516: remove ambiguity test (1) Linked glossary from cvs-migration page write-tree: properly detect failure to write tree objects
2008-04-23write-tree: properly detect failure to write tree objectsLibravatar Junio C Hamano1-2/+5
Tomasz Fortuna reported that "git commit" does not error out properly when it cannot write tree objects out. "git write-tree" shares the same issue, as the failure to notice the error is deep in the logic to write tree objects out recursively. Signed-off-by: Junio C Hamano <gitster@pobox.com>
2008-02-11Merge branch 'jc/error-message-in-cherry-pick'Libravatar Junio C Hamano1-0/+55
* jc/error-message-in-cherry-pick: Make error messages from cherry-pick/revert more sensible
2008-02-05Make error messages from cherry-pick/revert more sensibleLibravatar Junio C Hamano1-0/+55
The original "rewrite in C" did somewhat a sloppy job while stealing code from git-write-tree. The caller pretends as if the write_tree() function would return an error code and being able to issue a sensible error message itself, but write_tree() function just calls die() and never returns an error. Worse yet, the function claims that it was running git-write-tree (which is no longer true after cherry-pick stole it). Tested-by: Björn Steinbrink <B.Steinbrink@gmx.de> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2008-01-21Make on-disk index representation separate from in-core oneLibravatar Linus Torvalds1-2/+2
This converts the index explicitly on read and write to its on-disk format, allowing the in-core format to contain more flags, and be simpler. In particular, the in-core format is now host-endian (as opposed to the on-disk one that is network endian in order to be able to be shared across machines) and as a result we can dispense with all the htonl/ntohl on accesses to the cache_entry fields. This will make it easier to make use of various temporary flags that do not exist in the on-disk format. Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-09-26Small cache_tree_write refactor.Libravatar Pierre Habouzit1-14/+5
This function cannot fail, make it void. Also make write_one act on a const char* instead of a char*. Signed-off-by: Pierre Habouzit <madcoder@debian.org> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2007-09-16Now that cache.h needs strbuf.h, remove useless includes.Libravatar Pierre Habouzit1-1/+0
Signed-off-by: Pierre Habouzit <madcoder@debian.org> Acked-by: Linus Torvalds <torvalds@linux-foundation.org> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2007-09-10Strbuf API extensions and fixes.Libravatar Pierre Habouzit1-3/+2
* Add strbuf_rtrim to remove trailing spaces. * Add strbuf_insert to insert data at a given position. * Off-by one fix in strbuf_addf: strbuf_avail() does not counts the final \0 so the overflow test for snprintf is the strict comparison. This is not critical as the growth mechanism chosen will always allocate _more_ memory than asked, so the second test will not fail. It's some kind of miracle though. * Add size extension hints for strbuf_init and strbuf_read. If 0, default applies, else: + initial buffer has the given size for strbuf_init. + first growth checks it has at least this size rather than the default 8192. Signed-off-by: Pierre Habouzit <madcoder@debian.org> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2007-09-06Use strbuf API in cache-tree.cLibravatar Pierre Habouzit1-37/+22
Should even be marginally faster. Signed-off-by: Pierre Habouzit <madcoder@debian.org> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2007-06-22Two trivial -Wcast-qual fixesLibravatar Junio C Hamano1-1/+1
Luiz Fernando N. Capitulino noticed the one in tree-walk.h where we cast away constness while computing the legnth of a tree entry. Signed-off-by: Junio C Hamano <gitster@pobox.com>
2007-05-21rename dirlink to gitlink.Libravatar Martin Waitz1-1/+1
Unify naming of plumbing dirlink/gitlink concept: git ls-files -z '*.[ch]' | xargs -0 perl -pi -e 's/dirlink/gitlink/g;' -e 's/DIRLNK/GITLINK/g;' Signed-off-by: Junio C Hamano <junkio@cox.net>
2007-04-10Teach core object handling functions about gitlinksLibravatar Linus Torvalds1-1/+1
This teaches the really fundamental core SHA1 object handling routines about gitlinks. We can compare trees with gitlinks in them (although we can not actually generate patches for them yet - just raw git diffs), and they show up as commits in "git ls-tree". We also know to compare gitlinks as if they were directories (ie the normal "sort as trees" rules apply). [jc: amended a cut&paste error] Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> Signed-off-by: Junio C Hamano <junkio@cox.net>
2006-11-13Catch errors when writing an index that contains invalid objects.Libravatar Johannes Sixt1-0/+2
If git-write-index is called without --missing-ok, it reports invalid objects that it finds in the index. But without this patch it dies right away or may run into an infinite loop. Signed-off-by: Johannes Sixt <johannes.sixt@telecom.at> Signed-off-by: Junio C Hamano <junkio@cox.net>
2006-10-30Surround "#define DEBUG 0" with "#ifndef DEBUG..#endif"Libravatar Junio C Hamano1-0/+2
Otherwise "make CFLAGS=-DDEBUG=1" is cumbersome to run. Signed-off-by: Junio C Hamano <junkio@cox.net>
2006-10-14Add hash_sha1_file()Libravatar Rene Scharfe1-6/+2
Most callers of write_sha1_file_prepare() are only interested in the resulting hash but don't care about the returned file name or the header. This patch adds a simple wrapper named hash_sha1_file() which does just that, and converts potential callers. Signed-off-by: Rene Scharfe <rene.scharfe@lsrfire.ath.cx> Signed-off-by: Junio C Hamano <junkio@cox.net>
2006-08-23Convert memcpy(a,b,20) to hashcpy(a,b).Libravatar Shawn Pearce1-3/+3
This abstracts away the size of the hash values when copying them from memory location to memory location, much as the introduction of hashcmp abstracted away hash value comparsion. A few call sites were using char* rather than unsigned char* so I added the cast rather than open hashcpy to be void*. This is a reasonable tradeoff as most call sites already use unsigned char* and the existing hashcmp is also declared to be unsigned char*. [jc: Splitted the patch to "master" part, to be followed by a patch for merge-recursive.c which is not in "master" yet. Fixed the cast in the latter hunk to combine-diff.c which was wrong in the original. Also converted ones left-over in combine-diff.c, diff-lib.c and upload-pack.c ] Signed-off-by: Shawn O. Pearce <spearce@spearce.org> Signed-off-by: Junio C Hamano <junkio@cox.net>
2006-05-07Merge branch 'jc/gitlink' into nextLibravatar Junio C Hamano1-0/+26
* jc/gitlink: write-tree: --prefix=<path> read-tree: --prefix=<path>/ option.
2006-05-03cache-tree: a bit more debugging support.Libravatar Junio C Hamano1-2/+6
Signed-off-by: Junio C Hamano <junkio@cox.net>
2006-05-01write-tree: --prefix=<path>Libravatar Junio C Hamano1-0/+26
The "bind" commit can express an aggregation of multiple projects into a single commit. In such an organization, there would be one project, root of whose tree object is at the same level of the root of the aggregated projects, and other projects have their toplevel in separate subdirectories. Let's call that root level project the "primary project", and call other ones just "subprojects". You would first read-tree the primary project, and then graft the subprojects under their appropriate location using read-tree --prefix=<subdir>/ repeatedly. To write out a tree object from such an index for a subproject, write-tree --prefix=<subdir>/ is used. Signed-off-by: Junio C Hamano <junkio@cox.net>
2006-05-01cache-tree: replace a sscanf() by two strtol() callsLibravatar Johannes Schindelin1-1/+10
On one of my systems, sscanf() first calls strlen() on the buffer. But this buffer is not terminated by NUL. So git crashed. strtol() does not share that problem, as it stops reading after the first non-digit. [jc: original patch was wrong and did not read the cache-tree structure correctly; this has been fixed up and tested minimally with fsck-objects. ] Signed-off-by: Johannes Schindelin <Johannes.Schindelin@gmx.de> Signed-off-by: Junio C Hamano <junkio@cox.net>
2006-04-27cache-tree.c: typefixLibravatar Junio C Hamano1-1/+1
Signed-off-by: Junio C Hamano <junkio@cox.net>
2006-04-27cache_tree_update: give an option to update cache-tree only.Libravatar Junio C Hamano1-5/+15
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>
2006-04-27read-tree: teach 1-way merege and plain read to prime cache-tree.Libravatar Junio C Hamano1-3/+8
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>
2006-04-25cache-tree: sort the subtree entries.Libravatar Junio C Hamano1-26/+66
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>
2006-04-24index: make the index file format extensible.Libravatar Junio C Hamano1-82/+26
... and move the cache-tree data into it. Signed-off-by: Junio C Hamano <junkio@cox.net>
2006-04-24cache-tree: protect against "git prune".Libravatar Junio C Hamano1-1/+1
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>
2006-04-23Add cache-tree.Libravatar Junio C Hamano1-0/+519
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>