168 lines
5.3 KiB
Plaintext
168 lines
5.3 KiB
Plaintext
git-diff-tree(1)
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================
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NAME
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----
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git-diff-tree - Compares the content and mode of blobs found via two tree objects
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SYNOPSIS
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--------
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[verse]
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'git diff-tree' [--stdin] [-m] [-s] [-v] [--no-commit-id] [--pretty]
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[-t] [-r] [-c | --cc] [--root] [<common diff options>]
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<tree-ish> [<tree-ish>] [<path>...]
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DESCRIPTION
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-----------
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Compares the content and mode of the blobs found via two tree objects.
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If there is only one <tree-ish> given, the commit is compared with its parents
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(see --stdin below).
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Note that 'git diff-tree' can use the tree encapsulated in a commit object.
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OPTIONS
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-------
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include::diff-options.txt[]
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<tree-ish>::
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The id of a tree object.
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<path>...::
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If provided, the results are limited to a subset of files
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matching one of these prefix strings.
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i.e., file matches `/^<pattern1>|<pattern2>|.../`
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Note that this parameter does not provide any wildcard or regexp
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features.
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-r::
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recurse into sub-trees
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-t::
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show tree entry itself as well as subtrees. Implies -r.
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--root::
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When `--root` is specified the initial commit will be shown as a big
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creation event. This is equivalent to a diff against the NULL tree.
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--stdin::
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When `--stdin` is specified, the command does not take
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<tree-ish> arguments from the command line. Instead, it
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reads lines containing either two <tree>, one <commit>, or a
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list of <commit> from its standard input. (Use a single space
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as separator.)
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+
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When two trees are given, it compares the first tree with the second.
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When a single commit is given, it compares the commit with its
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parents. The remaining commits, when given, are used as if they are
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parents of the first commit.
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+
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When comparing two trees, the ID of both trees (separated by a space
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and terminated by a newline) is printed before the difference. When
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comparing commits, the ID of the first (or only) commit, followed by a
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newline, is printed.
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+
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The following flags further affect the behavior when comparing
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commits (but not trees).
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-m::
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By default, 'git diff-tree --stdin' does not show
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differences for merge commits. With this flag, it shows
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differences to that commit from all of its parents. See
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also `-c`.
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-s::
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By default, 'git diff-tree --stdin' shows differences,
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either in machine-readable form (without `-p`) or in patch
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form (with `-p`). This output can be suppressed. It is
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only useful with `-v` flag.
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-v::
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This flag causes 'git diff-tree --stdin' to also show
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the commit message before the differences.
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include::pretty-options.txt[]
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--no-commit-id::
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'git diff-tree' outputs a line with the commit ID when
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applicable. This flag suppressed the commit ID output.
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-c::
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This flag changes the way a merge commit is displayed
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(which means it is useful only when the command is given
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one <tree-ish>, or `--stdin`). It shows the differences
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from each of the parents to the merge result simultaneously
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instead of showing pairwise diff between a parent and the
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result one at a time (which is what the `-m` option does).
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Furthermore, it lists only files which were modified
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from all parents.
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--cc::
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This flag changes the way a merge commit patch is displayed,
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in a similar way to the `-c` option. It implies the `-c`
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and `-p` options and further compresses the patch output
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by omitting uninteresting hunks whose the contents in the parents
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have only two variants and the merge result picks one of them
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without modification. When all hunks are uninteresting, the commit
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itself and the commit log message is not shown, just like in any other
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"empty diff" case.
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--always::
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Show the commit itself and the commit log message even
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if the diff itself is empty.
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include::pretty-formats.txt[]
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Limiting Output
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---------------
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If you're only interested in differences in a subset of files, for
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example some architecture-specific files, you might do:
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git diff-tree -r <tree-ish> <tree-ish> arch/ia64 include/asm-ia64
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and it will only show you what changed in those two directories.
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Or if you are searching for what changed in just `kernel/sched.c`, just do
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git diff-tree -r <tree-ish> <tree-ish> kernel/sched.c
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and it will ignore all differences to other files.
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The pattern is always the prefix, and is matched exactly. There are no
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wildcards. Even stricter, it has to match a complete path component.
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I.e. "foo" does not pick up `foobar.h`. "foo" does match `foo/bar.h`
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so it can be used to name subdirectories.
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An example of normal usage is:
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torvalds@ppc970:~/git> git diff-tree --abbrev 5319e4
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:100664 100664 ac348b... a01513... git-fsck-objects.c
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which tells you that the last commit changed just one file (it's from
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this one:
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-----------------------------------------------------------------------------
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commit 3c6f7ca19ad4043e9e72fa94106f352897e651a8
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tree 5319e4d609cdd282069cc4dce33c1db559539b03
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parent b4e628ea30d5ab3606119d2ea5caeab141d38df7
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author Linus Torvalds <torvalds@ppc970.osdl.org> Sat Apr 9 12:02:30 2005
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committer Linus Torvalds <torvalds@ppc970.osdl.org> Sat Apr 9 12:02:30 2005
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Make "git-fsck-objects" print out all the root commits it finds.
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Once I do the reference tracking, I'll also make it print out all the
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HEAD commits it finds, which is even more interesting.
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-----------------------------------------------------------------------------
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in case you care).
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include::diff-format.txt[]
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GIT
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---
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Part of the linkgit:git[1] suite
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