d76ce4f734
The combined diff format for merges will only list one filename, even if rename or copy detection is active. For example, with raw format one might see: ::100644 100644 100644fabadb8cc95eb04866510MM describe.c ::100755 100755 100755 52b7a2d 6d1ac04 d2ac7d7 RM bar.sh ::100644 100644 100644 e07d6c5 9042e82 ee91881 RR phooey.c This doesn't let us know what the original name of bar.sh was in the first parent, and doesn't let us know what either of the original names of phooey.c were in either of the parents. In contrast, for non-merge commits, raw format does provide original filenames (and a rename score to boot). In order to also provide original filenames for merge commits, add a --combined-all-paths option (which must be used with either -c or --cc, and is likely only useful with rename or copy detection active) so that we can print tab-separated filenames when renames are involved. This transforms the above output to: ::100644 100644 100644fabadb8cc95eb04866510MM desc.c desc.c desc.c ::100755 100755 100755 52b7a2d 6d1ac04 d2ac7d7 RM foo.sh bar.sh bar.sh ::100644 100644 100644 e07d6c5 9042e82 ee91881 RR fooey.c fuey.c phooey.c Further, in patch format, this changes the from/to headers so that instead of just having one "from" header, we get one for each parent. For example, instead of having --- a/phooey.c +++ b/phooey.c we would see --- a/fooey.c --- a/fuey.c +++ b/phooey.c Signed-off-by: Elijah Newren <newren@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
175 lines
5.6 KiB
Plaintext
175 lines
5.6 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] [--combined-all-paths] [--root]
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[<common diff options>] <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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--combined-all-paths::
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This flag causes combined diffs (used for merge commits) to
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list the name of the file from all parents. It thus only has
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effect when -c or --cc are specified, and is likely only
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useful if filename changes are detected (i.e. when either
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rename or copy detection have been requested).
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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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