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git/builtin-write-tree.c

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Add copyright notices. The tool interface sucks (especially "committing" information, which is just me doing everything by hand from the command line), but I think this is in theory actually a viable way of describing the world. So copyright it.
2005-04-08 00:16:10 +02:00
/*
* GIT - The information manager from hell
*
* Copyright (C) Linus Torvalds, 2005
*/
Make git-write-tree a builtin Signed-off-by: Lukas Sandström <lukass@etek.chalmers.se> Signed-off-by: Junio C Hamano <junkio@cox.net>
2006-06-13 22:21:42 +02:00
#include "builtin.h"
Initial revision of "git", the information manager from hell
2005-04-08 00:13:13 +02:00
#include "cache.h"
Use blob_, commit_, tag_, and tree_type throughout. This replaces occurences of "blob", "commit", "tag", and "tree", where they're really used as type specifiers, which we already have defined global constants for. Signed-off-by: Peter Eriksen <s022018@student.dtu.dk> Signed-off-by: Junio C Hamano <junkio@cox.net>
2006-04-02 14:44:09 +02:00
#include "tree.h"
Update write-tree to use cache-tree. The updated write-tree reads from $GIT_DIR/index.aux to pick up subtree objects information, updates the cache-tree with the index, and updates index.aux file after writing a tree out of the index file. Until update-index and other programs that modify the index are updated to maintain index.aux file, the index.aux file written by the last write-tree will become stale immediately after they update the index, which will result in the whole tree recomputation just like the original write-tree. The idea is to convert those commands to invalidate cache-tree whenever they touch the index entries, and write updated index.aux out. After the index is updated with them, write-tree will be able to reuse the parts of the cache-tree that have not been touched. Signed-off-by: Junio C Hamano <junkio@cox.net>
2006-04-24 01:52:35 +02:00
#include "cache-tree.h"
Initial revision of "git", the information manager from hell
2005-04-08 00:13:13 +02:00
write-tree: --prefix=<path> 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>
2006-04-26 10:20:50 +02:00
static const char write_tree_usage[] =
"git-write-tree [--missing-ok] [--prefix=<prefix>/]";
write-tree: check extra arguments and die but be a bit more helpful. "git-write-tree junk" complains and dies, but it does not say what option it supports. Die with the usage string in such a case. Signed-off-by: Junio C Hamano <junkio@cox.net>
2005-12-06 07:30:07 +01:00
Make git-write-tree a builtin Signed-off-by: Lukas Sandström <lukass@etek.chalmers.se> Signed-off-by: Junio C Hamano <junkio@cox.net>
2006-06-13 22:21:42 +02:00
int write_tree(unsigned char *sha1, int missing_ok, const char *prefix)
This implements the new "recursive tree" write-tree. It's got some debugging printouts etc still in it, but testing on the kernel seems to show that it does indeed fix the issue with huge tree files for each commit.
2005-04-10 02:09:34 +02:00
{
index: make the index file format extensible. ... and move the cache-tree data into it. Signed-off-by: Junio C Hamano <junkio@cox.net>
2006-04-25 06:18:58 +02:00
int entries, was_valid, newfd;
Update write-tree to use cache-tree. The updated write-tree reads from $GIT_DIR/index.aux to pick up subtree objects information, updates the cache-tree with the index, and updates index.aux file after writing a tree out of the index file. Until update-index and other programs that modify the index are updated to maintain index.aux file, the index.aux file written by the last write-tree will become stale immediately after they update the index, which will result in the whole tree recomputation just like the original write-tree. The idea is to convert those commands to invalidate cache-tree whenever they touch the index entries, and write updated index.aux out. After the index is updated with them, write-tree will be able to reuse the parts of the cache-tree that have not been touched. Signed-off-by: Junio C Hamano <junkio@cox.net>
2006-04-24 01:52:35 +02:00
Make git-write-tree a builtin Signed-off-by: Lukas Sandström <lukass@etek.chalmers.se> Signed-off-by: Junio C Hamano <junkio@cox.net>
2006-06-13 22:21:42 +02:00
/* We can't free this memory, it becomes part of a linked list parsed atexit() */
Initialize lock_file struct to all zero. hold_lock_file_for_update() relies on that. Signed-off-by: Johannes Schindelin <Johannes.Schindelin@gmx.de> Signed-off-by: Junio C Hamano <junkio@cox.net>
2006-06-20 00:55:20 +02:00
struct lock_file *lock_file = xcalloc(1, sizeof(struct lock_file));
Make the rest of commands work from a subdirectory. These commands are converted to run from a subdirectory. commit-tree convert-objects merge-base merge-index mktag pack-objects pack-redundant prune-packed read-tree tar-tree unpack-file unpack-objects update-server-info write-tree Signed-off-by: Junio C Hamano <junkio@cox.net>
2005-11-26 09:50:02 +01:00
_GIT_INDEX_OUTPUT: allow plumbing to output to an alternative index file. When defined, this allows plumbing commands that update the index (add, apply, checkout-index, merge-recursive, mv, read-tree, rm, update-index, and write-tree) to write their resulting index to an alternative index file while holding a lock to the original index file. With this, git-commit that jumps the index does not have to make an extra copy of the index file, and more importantly, it can do the update while holding the lock on the index. However, I think the interface to let an environment variable specify the output is a mistake, as shown in the documentation. If a curious user has the environment variable set to something other than the file GIT_INDEX_FILE points at, almost everything will break. This should instead be a command line parameter to tell these plumbing commands to write the result in the named file, to prevent stupid mistakes. Signed-off-by: Junio C Hamano <junkio@cox.net>
2007-04-01 08:09:02 +02:00
newfd = hold_locked_index(lock_file, 1);
This implements the new "recursive tree" write-tree. It's got some debugging printouts etc still in it, but testing on the kernel seems to show that it does indeed fix the issue with huge tree files for each commit.
2005-04-10 02:09:34 +02:00
Make git-write-tree a builtin Signed-off-by: Lukas Sandström <lukass@etek.chalmers.se> Signed-off-by: Junio C Hamano <junkio@cox.net>
2006-06-13 22:21:42 +02:00
entries = read_cache();
write-tree is now willing to write empty tree Cogito wants to be able to do some initial commit at the time of cg-init, which may be empty in case when cg-init is called in an empty tree.
2005-05-08 16:15:59 +02:00
if (entries < 0)
[PATCH] cleanup of in-code names Fixes all in-code names that leaved during "big name change". Signed-off-by: Alexey Nezhdanov <snake@penza-gsm.ru> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-05-19 13:17:16 +02:00
die("git-write-tree: error reading cache");
write-tree: refuse to write out trees with unmerged index entries. Of course, we can't even generate such an index yet, but give me some time. This is a cunning plan. Let's see if it actually works. (I feel like Wile E Coyote, waiting for the big rock to fall).
2005-04-16 07:04:54 +02:00
index: make the index file format extensible. ... and move the cache-tree data into it. Signed-off-by: Junio C Hamano <junkio@cox.net>
2006-04-25 06:18:58 +02:00
if (!active_cache_tree)
active_cache_tree = cache_tree();
was_valid = cache_tree_fully_valid(active_cache_tree);
Make git-write-tree a builtin Signed-off-by: Lukas Sandström <lukass@etek.chalmers.se> Signed-off-by: Junio C Hamano <junkio@cox.net>
2006-06-13 22:21:42 +02:00
index: make the index file format extensible. ... and move the cache-tree data into it. Signed-off-by: Junio C Hamano <junkio@cox.net>
2006-04-25 06:18:58 +02:00
if (!was_valid) {
if (cache_tree_update(active_cache_tree,
active_cache, active_nr,
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>
2006-04-28 01:21:54 +02:00
missing_ok, 0) < 0)
index: make the index file format extensible. ... and move the cache-tree data into it. Signed-off-by: Junio C Hamano <junkio@cox.net>
2006-04-25 06:18:58 +02:00
die("git-write-tree: error building trees");
if (0 <= newfd) {
Close the index file between writing and committing Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de> Signed-off-by: Junio C Hamano <junkio@cox.net>
2006-07-08 10:56:28 +02:00
if (!write_cache(newfd, active_cache, active_nr)
Fix handle leak in write_tree This is a quick and dirty fix for the broken "git cherry-pick -n" on some broken OS, which does not remove the directory entry after unlink succeeded(!) if the file is still open somewher. The entry is left but "protected": no open, no unlink, no stat. Very annoying. Signed-off-by: Alex Riesen <raa.lkml@gmail.com> Signed-off-by: Junio C Hamano <junkio@cox.net>
2007-04-26 00:28:17 +02:00
&& !close(newfd)) {
Make git-write-tree a builtin Signed-off-by: Lukas Sandström <lukass@etek.chalmers.se> Signed-off-by: Junio C Hamano <junkio@cox.net>
2006-06-13 22:21:42 +02:00
commit_lock_file(lock_file);
Fix handle leak in write_tree This is a quick and dirty fix for the broken "git cherry-pick -n" on some broken OS, which does not remove the directory entry after unlink succeeded(!) if the file is still open somewher. The entry is left but "protected": no open, no unlink, no stat. Very annoying. Signed-off-by: Alex Riesen <raa.lkml@gmail.com> Signed-off-by: Junio C Hamano <junkio@cox.net>
2007-04-26 00:28:17 +02:00
newfd = -1;
}
index: make the index file format extensible. ... and move the cache-tree data into it. Signed-off-by: Junio C Hamano <junkio@cox.net>
2006-04-25 06:18:58 +02:00
}
/* Not being able to write is fine -- we are only interested
* in updating the cache-tree part, and if the next caller
* ends up using the old index with unupdated cache-tree part
* it misses the work we did here, but that is just a
* performance penalty and not a big deal.
*/
}
Make git-write-tree a builtin Signed-off-by: Lukas Sandström <lukass@etek.chalmers.se> Signed-off-by: Junio C Hamano <junkio@cox.net>
2006-06-13 22:21:42 +02:00
write-tree: --prefix=<path> 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>
2006-04-26 10:20:50 +02:00
if (prefix) {
struct cache_tree *subtree =
cache_tree_find(active_cache_tree, prefix);
git-write-tree should not crash if prefix does not exist Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2007-07-26 05:14:54 +02:00
if (!subtree)
die("git-write-tree: prefix %s not found", prefix);
Convert memcpy(a,b,20) to hashcpy(a,b). 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>
2006-08-23 08:49:00 +02:00
hashcpy(sha1, subtree->sha1);
write-tree: --prefix=<path> 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>
2006-04-26 10:20:50 +02:00
}
else
Convert memcpy(a,b,20) to hashcpy(a,b). 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>
2006-08-23 08:49:00 +02:00
hashcpy(sha1, active_cache_tree->sha1);
Make git-write-tree a builtin Signed-off-by: Lukas Sandström <lukass@etek.chalmers.se> Signed-off-by: Junio C Hamano <junkio@cox.net>
2006-06-13 22:21:42 +02:00
Fix handle leak in write_tree This is a quick and dirty fix for the broken "git cherry-pick -n" on some broken OS, which does not remove the directory entry after unlink succeeded(!) if the file is still open somewher. The entry is left but "protected": no open, no unlink, no stat. Very annoying. Signed-off-by: Alex Riesen <raa.lkml@gmail.com> Signed-off-by: Junio C Hamano <junkio@cox.net>
2007-04-26 00:28:17 +02:00
if (0 <= newfd)
close(newfd);
Make git-write-tree a builtin Signed-off-by: Lukas Sandström <lukass@etek.chalmers.se> Signed-off-by: Junio C Hamano <junkio@cox.net>
2006-06-13 22:21:42 +02:00
rollback_lock_file(lock_file);
Initial revision of "git", the information manager from hell
2005-04-08 00:13:13 +02:00
return 0;
}
Make git-write-tree a builtin Signed-off-by: Lukas Sandström <lukass@etek.chalmers.se> Signed-off-by: Junio C Hamano <junkio@cox.net>
2006-06-13 22:21:42 +02:00
Call setup_git_directory() much earlier This changes the calling convention of built-in commands and passes the "prefix" (i.e. pathname of $PWD relative to the project root level) down to them. Signed-off-by: Linus Torvalds <torvalds@osdl.org> Signed-off-by: Junio C Hamano <junkio@cox.net>
2006-07-29 07:44:25 +02:00
int cmd_write_tree(int argc, const char **argv, const char *unused_prefix)
Make git-write-tree a builtin Signed-off-by: Lukas Sandström <lukass@etek.chalmers.se> Signed-off-by: Junio C Hamano <junkio@cox.net>
2006-06-13 22:21:42 +02:00
{
int missing_ok = 0, ret;
const char *prefix = NULL;
unsigned char sha1[20];
Fix racy-git handling in git-write-tree. After git-write-tree finishes computing the tree, it updates the index so that later operations can take advantage of fully populated cache tree. However, anybody writing the index file has to mark the entries that are racily clean. For each entry whose cached lstat(3) data in the index exactly matches what is obtained from the filesystem, if the timestamp on the index file was the same or older than the modification timestamp of the file, the blob contents and the work tree file, after convert_to_git(), need to be compared, and if they are different, its index entry needs to be marked not to match the lstat(3) data from the filesystem. In order for this to work, convert_to_git() needs to work correctly, which in turn means you need to read the config file to get the settings of core.crlf and friends. Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2007-08-23 19:18:54 +02:00
git_config(git_default_config);
Make git-write-tree a builtin Signed-off-by: Lukas Sandström <lukass@etek.chalmers.se> Signed-off-by: Junio C Hamano <junkio@cox.net>
2006-06-13 22:21:42 +02:00
while (1 < argc) {
const char *arg = argv[1];
if (!strcmp(arg, "--missing-ok"))
missing_ok = 1;
Mechanical conversion to use prefixcmp() This mechanically converts strncmp() to use prefixcmp(), but only when the parameters match specific patterns, so that they can be verified easily. Leftover from this will be fixed in a separate step, including idiotic conversions like if (!strncmp("foo", arg, 3)) => if (!(-prefixcmp(arg, "foo"))) This was done by using this script in px.perl #!/usr/bin/perl -i.bak -p if (/strncmp\(([^,]+), "([^\\"]*)", (\d+)\)/ && (length($2) == $3)) { s|strncmp\(([^,]+), "([^\\"]*)", (\d+)\)|prefixcmp($1, "$2")|; } if (/strncmp\("([^\\"]*)", ([^,]+), (\d+)\)/ && (length($1) == $3)) { s|strncmp\("([^\\"]*)", ([^,]+), (\d+)\)|(-prefixcmp($2, "$1"))|; } and running: $ git grep -l strncmp -- '*.c' | xargs perl px.perl Signed-off-by: Junio C Hamano <junkio@cox.net>
2007-02-20 10:53:29 +01:00
else if (!prefixcmp(arg, "--prefix="))
Make git-write-tree a builtin Signed-off-by: Lukas Sandström <lukass@etek.chalmers.se> Signed-off-by: Junio C Hamano <junkio@cox.net>
2006-06-13 22:21:42 +02:00
prefix = arg + 9;
else
Replace some calls to die(usage_str) with usage(usage_str). The only change in behaviour should be having a "usage: " prefix on the output string rather than "fatal: ", and an exit code of 129 rather than 128. Signed-off-by: Ramsay Allan Jones <ramsay@ramsay1.demon.co.uk> Signed-off-by: Junio C Hamano <junkio@cox.net>
2006-08-03 17:48:41 +02:00
usage(write_tree_usage);
Make git-write-tree a builtin Signed-off-by: Lukas Sandström <lukass@etek.chalmers.se> Signed-off-by: Junio C Hamano <junkio@cox.net>
2006-06-13 22:21:42 +02:00
argc--; argv++;
}
if (argc > 2)
die("too many options");
ret = write_tree(sha1, missing_ok, prefix);
printf("%s\n", sha1_to_hex(sha1));
return ret;
}
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