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229 include::./stylesheets/xhtml11-manpage.css[]
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256 padding-left: 0.5em;
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259 <title>git-diff-tree(1)</title>
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264 git-diff-tree(1) Manual Page
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267 <div class="sectionbody">
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269 Compares the content and mode of blobs found via two tree objects
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274 <div class="sectionbody">
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275 <div class="verseblock">
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276 <div class="content"><em>git-diff-tree</em> [--stdin] [-m] [-s] [-v] [--no-commit-id] [--pretty] [-t] [-r]
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277 [--root] [<common diff options>] <tree-ish> [<tree-ish>] [<path>…]</div></div>
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279 <h2>DESCRIPTION</h2>
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280 <div class="sectionbody">
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281 <p>Compares the content and mode of the blobs found via two tree objects.</p>
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282 <p>If there is only one <tree-ish> given, the commit is compared with its parents
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283 (see --stdin below).</p>
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284 <p>Note that "git-diff-tree" can use the tree encapsulated in a commit object.</p>
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287 <div class="sectionbody">
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294 Generate patch (see section on generating patches)
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310 \0 line termination on output
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318 Show only names of changed files.
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326 Show only names and status of changed files.
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334 Instead of the first handful characters, show full
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335 object name of pre- and post-image blob on the "index"
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336 line when generating a patch format output.
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340 --abbrev[=<n>]
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344 Instead of showing the full 40-byte hexadecimal object
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345 name in diff-raw format output and diff-tree header
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346 lines, show only handful hexdigits prefix. This is
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347 independent of --full-index option above, which controls
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348 the diff-patch output format. Non default number of
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349 digits can be specified with --abbrev=<n>.
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357 Break complete rewrite changes into pairs of delete and create.
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373 Detect copies as well as renames.
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377 --find-copies-harder
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381 For performance reasons, by default, -C option finds copies only
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382 if the original file of the copy was modified in the same
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383 changeset. This flag makes the command
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384 inspect unmodified files as candidates for the source of
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385 copy. This is a very expensive operation for large
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386 projects, so use it with caution.
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394 -M and -C options require O(n^2) processing time where n
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395 is the number of potential rename/copy targets. This
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396 option prevents rename/copy detection from running if
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397 the number of rename/copy targets exceeds the specified
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406 Look for differences that contain the change in <string>.
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414 When -S finds a change, show all the changes in that
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415 changeset, not just the files that contain the change
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420 -O<orderfile>
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424 Output the patch in the order specified in the
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425 <orderfile>, which has one shell glob pattern per line.
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433 Swap two inputs; that is, show differences from index or
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434 on-disk file to tree contents.
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438 <p>For more detailed explanation on these common options, see also
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439 <a href="diffcore.html">diffcore documentation</a>.</p>
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446 The id of a tree object.
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450 <path>…
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454 If provided, the results are limited to a subset of files
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455 matching one of these prefix strings.
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456 ie file matches <tt>/^<pattern1>|<pattern2>|…/</tt>
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457 Note that this parameter does not provide any wildcard or regexp
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466 recurse into sub-trees
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474 show tree entry itself as well as subtrees. Implies -r.
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482 When <em>--root</em> is specified the initial commit will be showed as a big
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483 creation event. This is equivalent to a diff against the NULL tree.
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491 When <em>--stdin</em> is specified, the command does not take
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492 <tree-ish> arguments from the command line. Instead, it
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493 reads either one <commit> or a pair of <tree-ish>
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494 separated with a single space from its standard input.
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496 <p>When a single commit is given on one line of such input, it compares
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497 the commit with its parents. The following flags further affects its
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498 behaviour. This does not apply to the case where two <tree-ish>
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499 separated with a single space are given.</p>
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506 By default, "git-diff-tree --stdin" does not show
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507 differences for merge commits. With this flag, it shows
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508 differences to that commit from all of its parents.
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516 By default, "git-diff-tree --stdin" shows differences,
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517 either in machine-readable form (without <em>-p</em>) or in patch
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518 form (with <em>-p</em>). This output can be suppressed. It is
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519 only useful with <em>-v</em> flag.
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527 This flag causes "git-diff-tree --stdin" to also show
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528 the commit message before the differences.
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532 --pretty[=(raw|medium|short)]
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536 This is used to control "pretty printing" format of the
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537 commit message. Without "=<style>", it defaults to
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546 git-diff-tree outputs a line with the commit ID when
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547 applicable. This flag suppressed the commit ID output.
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552 <h2>Limiting Output</h2>
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553 <div class="sectionbody">
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554 <p>If you're only interested in differences in a subset of files, for
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555 example some architecture-specific files, you might do:</p>
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556 <div class="literalblock">
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557 <div class="content">
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558 <pre><tt>git-diff-tree -r <tree-ish> <tree-ish> arch/ia64 include/asm-ia64</tt></pre>
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560 <p>and it will only show you what changed in those two directories.</p>
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561 <p>Or if you are searching for what changed in just <tt>kernel/sched.c</tt>, just do</p>
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562 <div class="literalblock">
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563 <div class="content">
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564 <pre><tt>git-diff-tree -r <tree-ish> <tree-ish> kernel/sched.c</tt></pre>
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566 <p>and it will ignore all differences to other files.</p>
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567 <p>The pattern is always the prefix, and is matched exactly. There are no
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568 wildcards. Even stricter, it has to match a complete path component.
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569 I.e. "foo" does not pick up <tt>foobar.h</tt>. "foo" does match <tt>foo/bar.h</tt>
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570 so it can be used to name subdirectories.</p>
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571 <p>An example of normal usage is:</p>
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572 <div class="literalblock">
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573 <div class="content">
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574 <pre><tt>torvalds@ppc970:~/git> git-diff-tree 5319e4......
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575 *100664->100664 blob ac348b.......->a01513....... git-fsck-objects.c</tt></pre>
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577 <p>which tells you that the last commit changed just one file (it's from
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579 <div class="listingblock">
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580 <div class="content">
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581 <pre><tt>commit 3c6f7ca19ad4043e9e72fa94106f352897e651a8
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582 tree 5319e4d609cdd282069cc4dce33c1db559539b03
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583 parent b4e628ea30d5ab3606119d2ea5caeab141d38df7
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584 author Linus Torvalds <torvalds@ppc970.osdl.org> Sat Apr 9 12:02:30 2005
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585 committer Linus Torvalds <torvalds@ppc970.osdl.org> Sat Apr 9 12:02:30 2005
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587 Make "git-fsck-objects" print out all the root commits it finds.
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589 Once I do the reference tracking, I'll also make it print out all the
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590 HEAD commits it finds, which is even more interesting.</tt></pre>
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592 <p>in case you care).</p>
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594 <h2>Output format</h2>
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595 <div class="sectionbody">
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596 <p>The output format from "git-diff-index", "git-diff-tree" and
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597 "git-diff-files" are very similar.</p>
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598 <p>These commands all compare two sets of things; what is
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599 compared differs:</p>
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602 git-diff-index <tree-ish>
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606 compares the <tree-ish> and the files on the filesystem.
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610 git-diff-index --cached <tree-ish>
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614 compares the <tree-ish> and the index.
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618 git-diff-tree [-r] <tree-ish-1> <tree-ish-2> [<pattern>…]
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622 compares the trees named by the two arguments.
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626 git-diff-files [<pattern>…]
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630 compares the index and the files on the filesystem.
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634 <p>An output line is formatted this way:</p>
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635 <div class="listingblock">
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636 <div class="content">
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637 <pre><tt>in-place edit :100644 100644 bcd1234... 0123456... M file0
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638 copy-edit :100644 100644 abcd123... 1234567... C68 file1 file2
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639 rename-edit :100644 100644 abcd123... 1234567... R86 file1 file3
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640 create :000000 100644 0000000... 1234567... A file4
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641 delete :100644 000000 1234567... 0000000... D file5
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642 unmerged :000000 000000 0000000... 0000000... U file6</tt></pre>
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644 <p>That is, from the left to the right:</p>
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653 mode for "src"; 000000 if creation or unmerged.
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663 mode for "dst"; 000000 if deletion or unmerged.
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673 sha1 for "src"; 0{40} if creation or unmerged.
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683 sha1 for "dst"; 0{40} if creation, unmerged or "look at work tree".
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693 status, followed by optional "score" number.
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698 a tab or a NUL when <em>-z</em> option is used.
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708 a tab or a NUL when <em>-z</em> option is used; only exists for C or R.
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713 path for "dst"; only exists for C or R.
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718 an LF or a NUL when <em>-z</em> option is used, to terminate the record.
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722 <p><sha1> is shown as all 0's if a file is new on the filesystem
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723 and it is out of sync with the index.</p>
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725 <div class="listingblock">
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726 <div class="content">
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727 <pre><tt>:100644 100644 5be4a4...... 000000...... M file.c</tt></pre>
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729 <p>When <tt>-z</tt> option is not used, TAB, LF, and backslash characters
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730 in pathnames are represented as <tt>\t</tt>, <tt>\n</tt>, and <tt>\\</tt>,
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733 <h2>Generating patches with -p</h2>
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734 <div class="sectionbody">
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735 <p>When "git-diff-index", "git-diff-tree", or "git-diff-files" are run
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736 with a <em>-p</em> option, they do not produce the output described above;
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737 instead they produce a patch file.</p>
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738 <p>The patch generation can be customized at two levels.</p>
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742 When the environment variable <em>GIT_EXTERNAL_DIFF</em> is not set,
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743 these commands internally invoke "diff" like this:
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745 <div class="literalblock">
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746 <div class="content">
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747 <pre><tt>diff -L a/<path> -L b/<path> -pu <old> <new></tt></pre>
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749 <p>For added files, <tt>/dev/null</tt> is used for <old>. For removed
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750 files, <tt>/dev/null</tt> is used for <new></p>
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751 <p>The "diff" formatting options can be customized via the
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752 environment variable <em>GIT_DIFF_OPTS</em>. For example, if you
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753 prefer context diff:</p>
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754 <div class="literalblock">
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755 <div class="content">
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756 <pre><tt>GIT_DIFF_OPTS=-c git-diff-index -p HEAD</tt></pre>
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761 When the environment variable <em>GIT_EXTERNAL_DIFF</em> is set, the
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762 program named by it is called, instead of the diff invocation
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765 <p>For a path that is added, removed, or modified,
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766 <em>GIT_EXTERNAL_DIFF</em> is called with 7 parameters:</p>
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767 <div class="literalblock">
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768 <div class="content">
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769 <pre><tt>path old-file old-hex old-mode new-file new-hex new-mode</tt></pre>
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772 <div class="hlist"><table>
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774 <td class="hlist1">
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775 <old|new>-file
\r
777 <td class="hlist2">
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778 are files GIT_EXTERNAL_DIFF can use to read the
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779 contents of <old|new>,
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783 <td class="hlist1">
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784 <old|new>-hex
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786 <td class="hlist2">
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787 are the 40-hexdigit SHA1 hashes,
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791 <td class="hlist1">
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792 <old|new>-mode
\r
794 <td class="hlist2">
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795 are the octal representation of the file modes.
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799 <p>The file parameters can point at the user's working file
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800 (e.g. <tt>new-file</tt> in "git-diff-files"), <tt>/dev/null</tt> (e.g. <tt>old-file</tt>
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801 when a new file is added), or a temporary file (e.g. <tt>old-file</tt> in the
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802 index). <em>GIT_EXTERNAL_DIFF</em> should not worry about unlinking the
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803 temporary file --- it is removed when <em>GIT_EXTERNAL_DIFF</em> exits.</p>
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806 <p>For a path that is unmerged, <em>GIT_EXTERNAL_DIFF</em> is called with 1
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807 parameter, <path>.</p>
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809 <h2>git specific extension to diff format</h2>
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810 <div class="sectionbody">
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811 <p>What -p option produces is slightly different from the
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812 traditional diff format.</p>
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816 It is preceded with a "git diff" header, that looks like
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819 <div class="literalblock">
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820 <div class="content">
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821 <pre><tt>diff --git a/file1 b/file2</tt></pre>
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823 <p>The <tt>a/</tt> and <tt>b/</tt> filenames are the same unless rename/copy is
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824 involved. Especially, even for a creation or a deletion,
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825 <tt>/dev/null</tt> is _not_ used in place of <tt>a/</tt> or <tt>b/</tt> filenames.</p>
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826 <p>When rename/copy is involved, <tt>file1</tt> and <tt>file2</tt> show the
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827 name of the source file of the rename/copy and the name of
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828 the file that rename/copy produces, respectively.</p>
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832 It is followed by one or more extended header lines:
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834 <div class="literalblock">
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835 <div class="content">
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836 <pre><tt>old mode <mode>
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837 new mode <mode>
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838 deleted file mode <mode>
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839 new file mode <mode>
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840 copy from <path>
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841 copy to <path>
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842 rename from <path>
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843 rename to <path>
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844 similarity index <number>
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845 dissimilarity index <number>
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846 index <hash>..<hash> <mode></tt></pre>
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851 TAB, LF, and backslash characters in pathnames are
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852 represented as <tt>\t</tt>, <tt>\n</tt>, and <tt>\\</tt>, respectively.
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858 <div class="sectionbody">
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859 <p>Written by Linus Torvalds <torvalds@osdl.org></p>
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861 <h2>Documentation</h2>
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862 <div class="sectionbody">
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863 <p>Documentation by David Greaves, Junio C Hamano and the git-list <git@vger.kernel.org>.</p>
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866 <div class="sectionbody">
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867 <p>Part of the <a href="git.html">git(7)</a> suite</p>
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870 <div id="footer-text">
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871 Last updated 06-Jan-2006 17:12:24 PDT
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projects / git.git / blob