Documentation/git-diff-tree.txt

   1 git-diff-tree(1)
   2 ================
   3
   4 NAME
   5 ----
   6 git-diff-tree - Compares the content and mode of blobs found via two tree objects
   7
   8
   9 SYNOPSIS
  10 --------
  11 [verse]
  12 'git diff-tree' [--stdin] [-m] [-s] [-v] [--no-commit-id] [--pretty]
  13               [-t] [-r] [-c | --cc] [--root] [<common diff options>]
  14               <tree-ish> [<tree-ish>] [<path>...]
  15
  16 DESCRIPTION
  17 -----------
  18 Compares the content and mode of the blobs found via two tree objects.
  19
  20 If there is only one <tree-ish> given, the commit is compared with its parents
  21 (see --stdin below).
  22
  23 Note that 'git diff-tree' can use the tree encapsulated in a commit object.
  24
  25 OPTIONS
  26 -------
  27 include::diff-options.txt[]
  28
  29 <tree-ish>::
  30         The id of a tree object.
  31
  32 <path>...::
  33         If provided, the results are limited to a subset of files
  34         matching one of these prefix strings.
  35         i.e., file matches `/^<pattern1>|<pattern2>|.../`
  36         Note that this parameter does not provide any wildcard or regexp
  37         features.
  38
  39 -r::
  40         recurse into sub-trees
  41
  42 -t::
  43         show tree entry itself as well as subtrees.  Implies -r.
  44
  45 --root::
  46         When '--root' is specified the initial commit will be shown as a big
  47         creation event. This is equivalent to a diff against the NULL tree.
  48
  49 --stdin::
  50         When '--stdin' is specified, the command does not take
  51         <tree-ish> arguments from the command line.  Instead, it
  52         reads lines containing either two <tree>, one <commit>, or a
  53         list of <commit> from its standard input.  (Use a single space
  54         as separator.)
  55 +
  56 When two trees are given, it compares the first tree with the second.
  57 When a single commit is given, it compares the commit with its
  58 parents.  The remaining commits, when given, are used as if they are
  59 parents of the first commit.
  60 +
  61 When comparing two trees, the ID of both trees (separated by a space
  62 and terminated by a newline) is printed before the difference.  When
  63 comparing commits, the ID of the first (or only) commit, followed by a
  64 newline, is printed.
  65 +
  66 The following flags further affect the behavior when comparing
  67 commits (but not trees).
  68
  69 -m::
  70         By default, 'git diff-tree --stdin' does not show
  71         differences for merge commits.  With this flag, it shows
  72         differences to that commit from all of its parents. See
  73         also '-c'.
  74
  75 -s::
  76         By default, 'git diff-tree --stdin' shows differences,
  77         either in machine-readable form (without '-p') or in patch
  78         form (with '-p').  This output can be suppressed.  It is
  79         only useful with '-v' flag.
  80
  81 -v::
  82         This flag causes 'git diff-tree --stdin' to also show
  83         the commit message before the differences.
  84
  85 include::pretty-options.txt[]
  86
  87 --no-commit-id::
  88         'git diff-tree' outputs a line with the commit ID when
  89         applicable.  This flag suppressed the commit ID output.
  90
  91 -c::
  92         This flag changes the way a merge commit is displayed
  93         (which means it is useful only when the command is given
  94         one <tree-ish>, or '--stdin').  It shows the differences
  95         from each of the parents to the merge result simultaneously
  96         instead of showing pairwise diff between a parent and the
  97         result one at a time (which is what the '-m' option does).
  98         Furthermore, it lists only files which were modified
  99         from all parents.
 100
 101 --cc::
 102         This flag changes the way a merge commit patch is displayed,
 103         in a similar way to the '-c' option. It implies the '-c'
 104         and '-p' options and further compresses the patch output
 105         by omitting uninteresting hunks whose the contents in the parents
 106         have only two variants and the merge result picks one of them
 107         without modification.  When all hunks are uninteresting, the commit
 108         itself and the commit log message is not shown, just like in any other
 109         "empty diff" case.
 110
 111 --always::
 112         Show the commit itself and the commit log message even
 113         if the diff itself is empty.
 114
 115
 116 include::pretty-formats.txt[]
 117
 118
 119 Limiting Output
 120 ---------------
 121 If you're only interested in differences in a subset of files, for
 122 example some architecture-specific files, you might do:
 123
 124         git diff-tree -r <tree-ish> <tree-ish> arch/ia64 include/asm-ia64
 125
 126 and it will only show you what changed in those two directories.
 127
 128 Or if you are searching for what changed in just `kernel/sched.c`, just do
 129
 130         git diff-tree -r <tree-ish> <tree-ish> kernel/sched.c
 131
 132 and it will ignore all differences to other files.
 133
 134 The pattern is always the prefix, and is matched exactly.  There are no
 135 wildcards.  Even stricter, it has to match a complete path component.
 136 I.e. "foo" does not pick up `foobar.h`.  "foo" does match `foo/bar.h`
 137 so it can be used to name subdirectories.
 138
 139 An example of normal usage is:
 140
 141   torvalds@ppc970:~/git> git diff-tree 5319e4......
 142   *100664->100664 blob    ac348b.......->a01513.......      git-fsck-objects.c
 143
 144 which tells you that the last commit changed just one file (it's from
 145 this one:
 146
 147 -----------------------------------------------------------------------------
 148 commit 3c6f7ca19ad4043e9e72fa94106f352897e651a8
 149 tree 5319e4d609cdd282069cc4dce33c1db559539b03
 150 parent b4e628ea30d5ab3606119d2ea5caeab141d38df7
 151 author Linus Torvalds <torvalds@ppc970.osdl.org> Sat Apr 9 12:02:30 2005
 152 committer Linus Torvalds <torvalds@ppc970.osdl.org> Sat Apr 9 12:02:30 2005
 153
 154 Make "git-fsck-objects" print out all the root commits it finds.
 155
 156 Once I do the reference tracking, I'll also make it print out all the
 157 HEAD commits it finds, which is even more interesting.
 158 -----------------------------------------------------------------------------
 159
 160 in case you care).
 161
 162
 163 include::diff-format.txt[]
 164
 165
 166 Author
 167 ------
 168 Written by Linus Torvalds <torvalds@osdl.org>
 169
 170 Documentation
 171 --------------
 172 Documentation by David Greaves, Junio C Hamano and the git-list <git@vger.kernel.org>.
 173
 174 GIT
 175 ---
 176 Part of the linkgit:git[1] suite