1git-diff-tree(1) 2================ 3 4NAME 5---- 6git-diff-tree - Compares the content and mode of blobs found via two tree objects 7 8 9SYNOPSIS 10-------- 11[verse] 12'git diff-tree' [--stdin] [-m] [-s] [-v] [--no-commit-id] [--pretty] 13 [-t] [-r] [-c | --cc] [--combined-all-paths] [--root] 14 [<common diff options>] <tree-ish> [<tree-ish>] [<path>...] 15 16DESCRIPTION 17----------- 18Compares the content and mode of the blobs found via two tree objects. 19 20If there is only one <tree-ish> given, the commit is compared with its parents 21(see --stdin below). 22 23Note that 'git diff-tree' can use the tree encapsulated in a commit object. 24 25OPTIONS 26------- 27include::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+ 56When two trees are given, it compares the first tree with the second. 57When a single commit is given, it compares the commit with its 58parents. The remaining commits, when given, are used as if they are 59parents of the first commit. 60+ 61When comparing two trees, the ID of both trees (separated by a space 62and terminated by a newline) is printed before the difference. When 63comparing commits, the ID of the first (or only) commit, followed by a 64newline, is printed. 65+ 66The following flags further affect the behavior when comparing 67commits (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 85include::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--combined-all-paths:: 112 This flag causes combined diffs (used for merge commits) to 113 list the name of the file from all parents. It thus only has 114 effect when -c or --cc are specified, and is likely only 115 useful if filename changes are detected (i.e. when either 116 rename or copy detection have been requested). 117 118--always:: 119 Show the commit itself and the commit log message even 120 if the diff itself is empty. 121 122 123include::pretty-formats.txt[] 124 125 126LIMITING OUTPUT 127--------------- 128If you're only interested in differences in a subset of files, for 129example some architecture-specific files, you might do: 130 131 git diff-tree -r <tree-ish> <tree-ish> arch/ia64 include/asm-ia64 132 133and it will only show you what changed in those two directories. 134 135Or if you are searching for what changed in just `kernel/sched.c`, just do 136 137 git diff-tree -r <tree-ish> <tree-ish> kernel/sched.c 138 139and it will ignore all differences to other files. 140 141The pattern is always the prefix, and is matched exactly. There are no 142wildcards. Even stricter, it has to match a complete path component. 143I.e. "foo" does not pick up `foobar.h`. "foo" does match `foo/bar.h` 144so it can be used to name subdirectories. 145 146An example of normal usage is: 147 148 torvalds@ppc970:~/git> git diff-tree --abbrev 5319e4 149 :100664 100664 ac348b... a01513... git-fsck-objects.c 150 151which tells you that the last commit changed just one file (it's from 152this one: 153 154----------------------------------------------------------------------------- 155commit 3c6f7ca19ad4043e9e72fa94106f352897e651a8 156tree 5319e4d609cdd282069cc4dce33c1db559539b03 157parent b4e628ea30d5ab3606119d2ea5caeab141d38df7 158author Linus Torvalds <torvalds@ppc970.osdl.org> Sat Apr 9 12:02:30 2005 159committer Linus Torvalds <torvalds@ppc970.osdl.org> Sat Apr 9 12:02:30 2005 160 161Make "git-fsck-objects" print out all the root commits it finds. 162 163Once I do the reference tracking, I'll also make it print out all the 164HEAD commits it finds, which is even more interesting. 165----------------------------------------------------------------------------- 166 167in case you care). 168 169 170include::diff-format.txt[] 171 172GIT 173--- 174Part of the linkgit:git[1] suite