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git/diff.h

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[PATCH] Diff-tree-helper take two. This reworks the diff-tree-helper and show-diff to further make external diff command interface simpler. These commands now honor GIT_EXTERNAL_DIFF environment variable which can point at an arbitrary program that takes 7 parameters: name file1 file1-sha1 file1-mode file2 file2-sha1 file2-mode The parameters for an external diff command are as follows: name this invocation of the command is to emit diff for the named cache/tree entry. file1 pathname that holds the contents of the first file. This can be a file inside the working tree, or a temporary file created from the blob object, or /dev/null. The command should not attempt to unlink it -- the temporary is unlinked by the caller. file1-sha1 sha1 hash if file1 is a blob object, or "." otherwise. file1-mode mode bits for file1, or "." for a deleted file. If GIT_EXTERNAL_DIFF environment variable is not set, the default is to invoke diff with the set of parameters old show-diff used to use. This built-in implementation honors the GIT_DIFF_CMD and GIT_DIFF_OPTS environment variables as before. Signed-off-by: Junio C Hamano <junkio@cox.net> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-04-26 18:25:05 +02:00
/*
* Copyright (C) 2005 Junio C Hamano
*/
[PATCH] Split external diff command interface to a separate file. With this patch, the non-core'ish part of show-diff command that invokes an external "diff" comand to obtain patches is split into a separate file. The next patch will introduce a new command, diff-tree-helper, which uses this common diff interface to format diff-tree and diff-cache output into a patch form. Signed-off-by: Junio C Hamano <junkio@cox.net> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-04-26 03:22:47 +02:00
#ifndef DIFF_H
#define DIFF_H
[PATCH] diff: mode bits fixes The core GIT repository has trees that record regular file mode in 0664 instead of normalized 0644 pattern. Comparing such a tree with another tree that records the same file in 0644 pattern without content changes with git-diff-tree causes it to feed otherwise unmodified pairs to the diff_change() routine, which triggers a sanity check routine and barfs. This patch fixes the problem, along with the fix to another caller that uses unnormalized mode bits to call diff_change() routine in a similar way. Without this patch, you will see "fatal error" from diff-tree when you run git-deltafy-script on the core GIT repository itself. Signed-off-by: Junio C Hamano <junkio@cox.net> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-06-01 20:38:07 +02:00
#define DIFF_FILE_CANON_MODE(mode) \
(S_ISREG(mode) ? (S_IFREG | ce_permissions(mode)) : \
S_ISLNK(mode) ? S_IFLNK : S_IFDIR)
[PATCH] Reworked external diff interface. This introduces three public functions for diff-cache and friends can use to call out to the GIT_EXTERNAL_DIFF program when they wish to. A normal "add/remove/change" entry is turned into 7-parameter process invocation of GIT_EXTERNAL_DIFF program as before. In addition, the program can now be called with a single parameter when diff-cache and friends want to report an unmerged path. Signed-off-by: Junio C Hamano <junkio@cox.net> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-04-27 18:21:00 +02:00
extern void diff_addremove(int addremove,
unsigned mode,
const unsigned char *sha1,
const char *base,
const char *path);
extern void diff_change(unsigned mode1, unsigned mode2,
const unsigned char *sha1,
const unsigned char *sha2,
const char *base, const char *path);
[PATCH] diff-raw format update take #2. This changes the diff-raw format again, following the mailing list discussion. The new format explicitly expresses which one is a rename and which one is a copy. The documentation and tests are updated to match this change. Signed-off-by: Junio C Hamano <junkio@cox.net> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-05-23 23:55:33 +02:00
extern void diff_helper_input(unsigned mode1,
unsigned mode2,
const unsigned char *sha1,
const unsigned char *sha2,
const char *path1,
int status,
int score,
const char *path2);
[PATCH] The diff-raw format updates. Update the diff-raw format as Linus and I discussed, except that it does not use sequence of underscore '_' letters to express nonexistence. All '0' mode is used for that purpose instead. The new diff-raw format can express rename/copy, and the earlier restriction that -M and -C _must_ be used with the patch format output is no longer necessary. The patch makes -M and -C flags independent of -p flag, so you need to say git-whatchanged -M -p to get the diff/patch format. Updated are both documentations and tests. Signed-off-by: Junio C Hamano <junkio@cox.net> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-05-22 04:42:18 +02:00
[PATCH] Reworked external diff interface. This introduces three public functions for diff-cache and friends can use to call out to the GIT_EXTERNAL_DIFF program when they wish to. A normal "add/remove/change" entry is turned into 7-parameter process invocation of GIT_EXTERNAL_DIFF program as before. In addition, the program can now be called with a single parameter when diff-cache and friends want to report an unmerged path. Signed-off-by: Junio C Hamano <junkio@cox.net> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-04-27 18:21:00 +02:00
extern void diff_unmerge(const char *path);
[PATCH] diff overhaul This cleans up the way calls are made into the diff core from diff-tree family and diff-helper. Earlier, these programs had "if (generating_patch)" sprinkled all over the place, but those ugliness are gone and handled uniformly from the diff core, even when not generating patch format. This also allowed diff-cache and diff-files to acquire -R (reverse) option to generate diff in reverse. Users of diff-tree can swap two trees easily so I did not add -R there. [ Linus' note: I'll add -R to "diff-tree" too, since a "commit diff" doesn't have another tree to switch around: the other tree is always the parent(s) of the commit ] Also -M<digits-as-mantissa> suggestion made by Linus has been implemented. Documentation updates are also included. Signed-off-by: Junio C Hamano <junkio@cox.net> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-05-20 04:00:36 +02:00
extern int diff_scoreopt_parse(const char *opt);
[PATCH] Clean up diff_setup() to make it more extensible. This changes the argument of diff_setup() from an integer that says if we are feeding reversed diff to a bitmask, so that later global options can be added more easily. Signed-off-by: Junio C Hamano <junkio@cox.net> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-05-28 00:54:37 +02:00
#define DIFF_SETUP_REVERSE 1
[PATCH] Optimize diff-tree -[CM] --stdin This attempts to optimize "diff-tree -[CM] --stdin", which compares successible tree pairs. This optimization does not make much sense for other commands in the diff-* brothers. When reading from --stdin and using rename/copy detection, the patch makes diff-tree to read the current index file first. This is done to reuse the optimization used by diff-cache in the non-cached case. Similarity estimator can avoid expanding a blob if the index says what is in the work tree has an exact copy of that blob already expanded. Another optimization the patch makes is to check only file sizes first to terminate similarity estimation early. In order for this to work, it needs a way to tell the size of the blob without expanding it. Since an obvious way of doing it, which is to keep all the blobs previously used in the memory, is too costly, it does so by keeping the filesize for each object it has already seen in memory. Signed-off-by: Junio C Hamano <junkio@cox.net> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-05-28 00:56:38 +02:00
#define DIFF_SETUP_USE_CACHE 2
#define DIFF_SETUP_USE_SIZE_CACHE 4
[PATCH] diff: Fix docs and add -O to diff-helper. This patch updates diff documentation and usage strings: - clarify the semantics of -R. It is not "output in reverse"; rather, it is "I will feed diff backwards". Semantically they are different when -C is involved. - describe -O in usage strings of diff-* brothers. It was implemented, documented but not described in usage text. Also it adds -O to diff-helper. Like -S (and unlike -M/-C/-B), this option can work on sanitized diff-raw output produced by the diff-* brothers. While we are at it, the call it makes to diffcore is cleaned up to use the diffcore_std() like everybody else, and the declaration for the low level diffcore routines are moved from diff.h (public) to diffcore.h (private between diff.c and diffcore backends). Signed-off-by: Junio C Hamano <junkio@cox.net> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-06-03 10:36:43 +02:00
[PATCH] Clean up diff_setup() to make it more extensible. This changes the argument of diff_setup() from an integer that says if we are feeding reversed diff to a bitmask, so that later global options can be added more easily. Signed-off-by: Junio C Hamano <junkio@cox.net> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-05-28 00:54:37 +02:00
extern void diff_setup(int flags);
[PATCH] Split external diff command interface to a separate file. With this patch, the non-core'ish part of show-diff command that invokes an external "diff" comand to obtain patches is split into a separate file. The next patch will introduce a new command, diff-tree-helper, which uses this common diff interface to format diff-tree and diff-cache output into a patch form. Signed-off-by: Junio C Hamano <junkio@cox.net> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-04-26 03:22:47 +02:00
[PATCH] Diffcore updates. This moves the path selection logic from individual programs to a new diffcore transformer (diff-tree still needs to have its own for performance reasons). Also the header printing code in diff-tree was tweaked not to produce anything when pickaxe is in effect and there is nothing interesting to report. An interesting example is the following in the GIT archive itself: $ git-whatchanged -p -C -S'or something in a real script' Signed-off-by: Junio C Hamano <junkio@cox.net> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-05-22 19:04:37 +02:00
#define DIFF_DETECT_RENAME 1
#define DIFF_DETECT_COPY 2
[PATCH] Add --pickaxe-all to diff-* brothers. When --pickaxe-all is given in addition to -S, pickaxe shows the entire diffs contained in the changeset, not just the diffs for the filepair that touched the sought-after string. This is useful to see the changes in context. Signed-off-by: Junio C Hamano <junkio@cox.net> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-05-28 00:55:28 +02:00
#define DIFF_PICKAXE_ALL 1
[PATCH] Add -B flag to diff-* brothers. A new diffcore transformation, diffcore-break.c, is introduced. When the -B flag is given, a patch that represents a complete rewrite is broken into a deletion followed by a creation. This makes it easier to review such a complete rewrite patch. The -B flag takes the same syntax as the -M and -C flags to specify the minimum amount of non-source material the resulting file needs to have to be considered a complete rewrite, and defaults to 99% if not specified. As the new test t4008-diff-break-rewrite.sh demonstrates, if a file is a complete rewrite, it is broken into a delete/create pair, which can further be subjected to the usual rename detection if -M or -C is used. For example, if file0 gets completely rewritten to make it as if it were rather based on file1 which itself disappeared, the following happens: The original change looks like this: file0 --> file0' (quite different from file0) file1 --> /dev/null After diffcore-break runs, it would become this: file0 --> /dev/null /dev/null --> file0' file1 --> /dev/null Then diffcore-rename matches them up: file1 --> file0' The internal score values are finer grained now. Earlier maximum of 10000 has been raised to 60000; there is no user visible changes but there is no reason to waste available bits. Signed-off-by: Junio C Hamano <junkio@cox.net> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-05-30 09:08:37 +02:00
[PATCH] diff: consolidate various calls into diffcore. The three diff-* brothers had a sequence of calls into diffcore that were almost identical. Introduce a new diffcore_std() function that takes all the necessary arguments to consolidate it. This will make later enhancements and changing the order of diffcore application simpler. Signed-off-by: Junio C Hamano <junkio@cox.net> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-05-30 01:56:13 +02:00
extern void diffcore_std(const char **paths,
int detect_rename, int rename_score,
[PATCH] Add -B flag to diff-* brothers. A new diffcore transformation, diffcore-break.c, is introduced. When the -B flag is given, a patch that represents a complete rewrite is broken into a deletion followed by a creation. This makes it easier to review such a complete rewrite patch. The -B flag takes the same syntax as the -M and -C flags to specify the minimum amount of non-source material the resulting file needs to have to be considered a complete rewrite, and defaults to 99% if not specified. As the new test t4008-diff-break-rewrite.sh demonstrates, if a file is a complete rewrite, it is broken into a delete/create pair, which can further be subjected to the usual rename detection if -M or -C is used. For example, if file0 gets completely rewritten to make it as if it were rather based on file1 which itself disappeared, the following happens: The original change looks like this: file0 --> file0' (quite different from file0) file1 --> /dev/null After diffcore-break runs, it would become this: file0 --> /dev/null /dev/null --> file0' file1 --> /dev/null Then diffcore-rename matches them up: file1 --> file0' The internal score values are finer grained now. Earlier maximum of 10000 has been raised to 60000; there is no user visible changes but there is no reason to waste available bits. Signed-off-by: Junio C Hamano <junkio@cox.net> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-05-30 09:08:37 +02:00
const char *pickaxe, int pickaxe_opts,
[PATCH] Add -O<orderfile> option to diff-* brothers. A new diffcore filter diffcore-order is introduced. This takes a text file each of whose line is a shell glob pattern. Patches that match a glob pattern on an earlier line in the file are output before patches that match a later line, and patches that do not match any glob pattern are output last. A typical orderfile for git project probably should look like this: README Makefile Documentation *.h *.c Signed-off-by: Junio C Hamano <junkio@cox.net> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-05-30 09:09:07 +02:00
int break_opt,
[PATCH] Add --diff-filter= output restriction to diff-* family. This is a halfway between debugging aid and a helper to write an ultra-smart merge scripts. The new option takes a string that consists of a list of "status" letters, and limits the diff output to only those classes of changes, with two exceptions: - A broken pair (aka "complete rewrite"), does not match D (deleted) or N (created). Use B to look for them. - The letter "A" in the diff-filter string does not match anything itself, but causes the entire diff that contains selected patches to be output (this behaviour is similar to that of --pickaxe-all for the -S option). For example, $ git-rev-list HEAD | git-diff-tree --stdin -s -v -B -C --diff-filter=BCR shows a list of commits that have complete rewrite, copy, or rename. Signed-off-by: Junio C Hamano <junkio@cox.net> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-06-12 05:57:13 +02:00
const char *orderfile, const char *filter);
extern void diffcore_std_no_resolve(const char **paths,
const char *pickaxe, int pickaxe_opts,
const char *orderfile, const char *filter);
[PATCH] diff: consolidate various calls into diffcore. The three diff-* brothers had a sequence of calls into diffcore that were almost identical. Introduce a new diffcore_std() function that takes all the necessary arguments to consolidate it. This will make later enhancements and changing the order of diffcore application simpler. Signed-off-by: Junio C Hamano <junkio@cox.net> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-05-30 01:56:13 +02:00
[PATCH] Clean up diff option descriptions. I got tired of maintaining almost duplicated descriptions in diff-* brothers, both in usage string and documentation. Signed-off-by: Junio C Hamano <junkio@cox.net> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-07-13 21:52:35 +02:00
#define COMMON_DIFF_OPTIONS_HELP \
"\ncommon diff options:\n" \
" -r diff recursively (only meaningful in diff-tree)\n" \
" -z output diff-raw with lines terminated with NUL.\n" \
" -p output patch format.\n" \
" -u synonym for -p.\n" \
" --name-only show only names of changed files.\n" \
" --name-only-z\n" \
" same as --name-only but terminate lines with NUL.\n" \
" -R swap input file pairs.\n" \
" -B detect complete rewrites.\n" \
" -M detect renames.\n" \
" -C detect copies.\n" \
" --find-copies-harder\n" \
" try unchanged files as candidate for copy detection.\n" \
" -O<file> reorder diffs according to the <file>.\n" \
" -S<string> find filepair whose only one side contains the string.\n" \
" --pickaxe-all\n" \
" show all files diff when -S is used and hit is found.\n"
[PATCH] Prepare diffcore interface for diff-tree header supression. This does not actually supress the extra headers when pickaxe is used, but prepares enough support for diff-tree to implement it. Signed-off-by: Junio C Hamano <junkio@cox.net> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-05-22 04:40:36 +02:00
extern int diff_queue_is_empty(void);
Split up "diff_format" into "format" and "line_termination". This removes the separate "formats" for name and name-with-zero- termination. It also removes the difference between HUMAN and MACHINE formats, and they both become DIFF_FORMAT_RAW, with the difference being just in the line and inter-filename termination. It also makes the code easier to understand.
2005-07-15 02:59:17 +02:00
#define DIFF_FORMAT_RAW 1
[PATCH] Clean up diff_setup() to make it more extensible. This changes the argument of diff_setup() from an integer that says if we are feeding reversed diff to a bitmask, so that later global options can be added more easily. Signed-off-by: Junio C Hamano <junkio@cox.net> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-05-28 00:54:37 +02:00
#define DIFF_FORMAT_PATCH 2
#define DIFF_FORMAT_NO_OUTPUT 3
[PATCH] git-diff-*: --name-only and --name-only-z. Porcelain layers often want to find only names of changed files, and even with diff-raw output format they end up having to pick out only the filename. Support --name-only (and --name-only-z for xargs -0 and cpio -0 users that want to treat filenames with embedded newlines sanely) flag to help them. Signed-off-by: Junio C Hamano <junkio@cox.net> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-07-13 21:45:51 +02:00
#define DIFF_FORMAT_NAME 4
[PATCH] Clean up diff_setup() to make it more extensible. This changes the argument of diff_setup() from an integer that says if we are feeding reversed diff to a bitmask, so that later global options can be added more easily. Signed-off-by: Junio C Hamano <junkio@cox.net> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-05-28 00:54:37 +02:00
Split up "diff_format" into "format" and "line_termination". This removes the separate "formats" for name and name-with-zero- termination. It also removes the difference between HUMAN and MACHINE formats, and they both become DIFF_FORMAT_RAW, with the difference being just in the line and inter-filename termination. It also makes the code easier to understand.
2005-07-15 02:59:17 +02:00
extern void diff_flush(int output_style, int line_terminator);
[PATCH] Split external diff command interface to a separate file. With this patch, the non-core'ish part of show-diff command that invokes an external "diff" comand to obtain patches is split into a separate file. The next patch will introduce a new command, diff-tree-helper, which uses this common diff interface to format diff-tree and diff-cache output into a patch form. Signed-off-by: Junio C Hamano <junkio@cox.net> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-04-26 03:22:47 +02:00
#endif /* DIFF_H */
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