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20 .TH "GIT-DIFF-FILES" 1 "" "" ""
22 git-diff-files \- Compares files in the working tree and the index
26 \fIgit\-diff\-files\fR [\-q] [\-0|\-1|\-2|\-3|\-c|\-\-cc] [<common diff options>] [<path>...]
31 Compares the files in the working tree and the index\&. When paths are specified, compares only those named paths\&. Otherwise all entries in the index are compared\&. The output format is the same as "git\-diff\-index" and "git\-diff\-tree"\&.
37 Generate patch (see section on generating patches)
45 Generate patch but keep also the default raw diff output\&.
49 Generate a diffstat instead of a patch\&.
53 Output a condensed summary of extended header information such as creations, renames and mode changes\&.
57 Generate patch and prepend its diffstat\&.
61 \\0 line termination on output
65 Show only names of changed files\&.
69 Show only names and status of changed files\&.
73 Instead of the first handful characters, show full object name of pre\- and post\-image blob on the "index" line when generating a patch format output\&.
77 Instead of showing the full 40\-byte hexadecimal object name in diff\-raw format output and diff\-tree header lines, show only handful hexdigits prefix\&. This is independent of \-\-full\-index option above, which controls the diff\-patch output format\&. Non default number of digits can be specified with \-\-abbrev=<n>\&.
81 Break complete rewrite changes into pairs of delete and create\&.
89 Detect copies as well as renames\&.
92 \-\-diff\-filter=[ACDMRTUXB*]
93 Select only files that are Added (A), Copied (C), Deleted (D), Modified (M), Renamed (R), have their type (mode) changed (T), are Unmerged (U), are Unknown (X), or have had their pairing Broken (B)\&. Any combination of the filter characters may be used\&. When * (All\-or\-none) is added to the combination, all paths are selected if there is any file that matches other criteria in the comparison; if there is no file that matches other criteria, nothing is selected\&.
96 \-\-find\-copies\-harder
97 For performance reasons, by default, \-C option finds copies only if the original file of the copy was modified in the same changeset\&. This flag makes the command inspect unmodified files as candidates for the source of copy\&. This is a very expensive operation for large projects, so use it with caution\&.
101 \-M and \-C options require O(n^2) processing time where n is the number of potential rename/copy targets\&. This option prevents rename/copy detection from running if the number of rename/copy targets exceeds the specified number\&.
105 Look for differences that contain the change in <string>\&.
109 When \-S finds a change, show all the changes in that changeset, not just the files that contain the change in <string>\&.
113 Make the <string> not a plain string but an extended POSIX regex to match\&.
117 Output the patch in the order specified in the <orderfile>, which has one shell glob pattern per line\&.
121 Swap two inputs; that is, show differences from index or on\-disk file to tree contents\&.
124 For more detailed explanation on these common options, see also diffcore documentation: \fIdiffcore.html\fR\&.
127 \-1 \-2 \-3 or \-\-base \-\-ours \-\-theirs, and \-0
128 Diff against the "base" version, "our branch" or "their branch" respectively\&. With these options, diffs for merged entries are not shown\&.
130 The default is to diff against our branch (\-2) and the cleanly resolved paths\&. The option \-0 can be given to omit diff output for unmerged entries and just show "Unmerged"\&.
134 This compares stage 2 (our branch), stage 3 (their branch) and the working tree file and outputs a combined diff, similar to the way \fIdiff\-tree\fR shows a merge commit with these flags\&.
138 Remain silent even on nonexisting files
143 The output format from "git\-diff\-index", "git\-diff\-tree" and "git\-diff\-files" are very similar\&.
146 These commands all compare two sets of things; what is compared differs:
149 git\-diff\-index <tree\-ish>
150 compares the <tree\-ish> and the files on the filesystem\&.
153 git\-diff\-index \-\-cached <tree\-ish>
154 compares the <tree\-ish> and the index\&.
157 git\-diff\-tree [\-r] <tree\-ish\-1> <tree\-ish\-2> [<pattern>...]
158 compares the trees named by the two arguments\&.
161 git\-diff\-files [<pattern>...]
162 compares the index and the files on the filesystem\&.
165 An output line is formatted this way:
168 in\-place edit :100644 100644 bcd1234\&.\&.\&. 0123456\&.\&.\&. M file0
169 copy\-edit :100644 100644 abcd123\&.\&.\&. 1234567\&.\&.\&. C68 file1 file2
170 rename\-edit :100644 100644 abcd123\&.\&.\&. 1234567\&.\&.\&. R86 file1 file3
171 create :000000 100644 0000000\&.\&.\&. 1234567\&.\&.\&. A file4
172 delete :100644 000000 1234567\&.\&.\&. 0000000\&.\&.\&. D file5
173 unmerged :000000 000000 0000000\&.\&.\&. 0000000\&.\&.\&. U file6
177 That is, from the left to the right:
184 mode for "src"; 000000 if creation or unmerged\&.
190 mode for "dst"; 000000 if deletion or unmerged\&.
196 sha1 for "src"; 0{40} if creation or unmerged\&.
202 sha1 for "dst"; 0{40} if creation, unmerged or "look at work tree"\&.
208 status, followed by optional "score" number\&.
211 a tab or a NUL when \fI\-z\fR option is used\&.
217 a tab or a NUL when \fI\-z\fR option is used; only exists for C or R\&.
220 path for "dst"; only exists for C or R\&.
223 an LF or a NUL when \fI\-z\fR option is used, to terminate the record\&.
227 <sha1> is shown as all 0's if a file is new on the filesystem and it is out of sync with the index\&.
233 :100644 100644 5be4a4\&.\&.\&.\&.\&.\&. 000000\&.\&.\&.\&.\&.\&. M file\&.c
237 When \-z option is not used, TAB, LF, and backslash characters in pathnames are represented as \\t, \\n, and \\\\, respectively\&.
239 .SH "GENERATING PATCHES WITH -P"
242 When "git\-diff\-index", "git\-diff\-tree", or "git\-diff\-files" are run with a \fI\-p\fR option, they do not produce the output described above; instead they produce a patch file\&.
245 The patch generation can be customized at two levels\&.
249 When the environment variable \fIGIT_EXTERNAL_DIFF\fR is not set, these commands internally invoke "diff" like this:
253 diff \-L a/<path> \-L b/<path> \-pu <old> <new>
255 For added files, /dev/null is used for <old>\&. For removed files, /dev/null is used for <new>
257 The "diff" formatting options can be customized via the environment variable \fIGIT_DIFF_OPTS\fR\&. For example, if you prefer context diff:
260 GIT_DIFF_OPTS=\-c git\-diff\-index \-p HEAD
264 When the environment variable \fIGIT_EXTERNAL_DIFF\fR is set, the program named by it is called, instead of the diff invocation described above\&.
266 For a path that is added, removed, or modified, \fIGIT_EXTERNAL_DIFF\fR is called with 7 parameters:
270 path old\-file old\-hex old\-mode new\-file new\-hex new\-mode
276 are files GIT_EXTERNAL_DIFF can use to read the contents of <old|new>,
280 are the 40\-hexdigit SHA1 hashes,
284 are the octal representation of the file modes\&.
286 The file parameters can point at the user's working file (e\&.g\&. new\-file in "git\-diff\-files"), /dev/null (e\&.g\&. old\-file when a new file is added), or a temporary file (e\&.g\&. old\-file in the index)\&. \fIGIT_EXTERNAL_DIFF\fR should not worry about unlinking the temporary file \-\-\- it is removed when \fIGIT_EXTERNAL_DIFF\fR exits\&.
290 For a path that is unmerged, \fIGIT_EXTERNAL_DIFF\fR is called with 1 parameter, <path>\&.
292 .SH "GIT SPECIFIC EXTENSION TO DIFF FORMAT"
295 What \-p option produces is slightly different from the traditional diff format\&.
299 It is preceded with a "git diff" header, that looks like this:
303 diff \-\-git a/file1 b/file2
305 The a/ and b/ filenames are the same unless rename/copy is involved\&. Especially, even for a creation or a deletion, /dev/null is _not_ used in place of a/ or b/ filenames\&.
307 When rename/copy is involved, file1 and file2 show the name of the source file of the rename/copy and the name of the file that rename/copy produces, respectively\&.
310 It is followed by one or more extended header lines:
315 deleted file mode <mode>
321 similarity index <number>
322 dissimilarity index <number>
323 index <hash>\&.\&.<hash> <mode>
327 TAB, LF, and backslash characters in pathnames are represented as \\t, \\n, and \\\\, respectively\&.
330 .SH "COMBINED DIFF FORMAT"
333 git\-diff\-tree and git\-diff\-files can take \fI\-c\fR or \fI\-\-cc\fR option to produce \fIcombined diff\fR, which looks like this:
336 diff \-\-combined describe\&.c
338 return (a_date > b_date) ? \-1 : (a_date == b_date) ? 0 : 1;
341 \- static void describe(char *arg)
342 \-static void describe(struct commit *cmit, int last_one)
343 ++static void describe(char *arg, int last_one)
345 + unsigned char sha1[20];
346 + struct commit *cmit;
350 Unlike the traditional \fIunified\fR diff format, which shows two files A and B with a single column that has \- (minus -- appears in A but removed in B), + (plus -- missing in A but added to B), or (space -- unchanged) prefix, this format compares two or more files file1, file2,... with one file X, and shows how X differs from each of fileN\&. One column for each of fileN is prepended to the output line to note how X's line is different from it\&.
353 A \- character in the column N means that the line appears in fileN but it does not appear in the last file\&. A + character in the column N means that the line appears in the last file, and fileN does not have that line\&.
356 In the above example output, the function signature was changed from both files (hence two \- removals from both file1 and file2, plus ++ to mean one line that was added does not appear in either file1 nor file2)\&. Also two other lines are the same from file1 but do not appear in file2 (hence prefixed with +)\&.
359 When shown by git diff\-tree \-c, it compares the parents of a merge commit with the merge result (i\&.e\&. file1\&.\&.fileN are the parents)\&. When shown by git diff\-files \-c, it compares the two unresolved merge parents with the working tree file (i\&.e\&. file1 is stage 2 aka "our version", file2 is stage 3 aka "their version")\&.
364 Written by Linus Torvalds <torvalds@osdl\&.org>
369 Documentation by David Greaves, Junio C Hamano and the git\-list <git@vger\&.kernel\&.org>\&.
374 Part of the \fBgit\fR(7) suite