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] [--root] [<common diff options>] 14 <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 showed 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 either one <commit> or a pair of <tree-ish> 53 separated with a single space from its standard input. 54+ 55When a single commit is given on one line of such input, it compares 56the commit with its parents. The following flags further affects its 57behavior. This does not apply to the case where two <tree-ish> 58separated with a single space are given. 59 60-m:: 61 By default, "git-diff-tree --stdin" does not show 62 differences for merge commits. With this flag, it shows 63 differences to that commit from all of its parents. See 64 also '-c'. 65 66-s:: 67 By default, "git-diff-tree --stdin" shows differences, 68 either in machine-readable form (without '-p') or in patch 69 form (with '-p'). This output can be suppressed. It is 70 only useful with '-v' flag. 71 72-v:: 73 This flag causes "git-diff-tree --stdin" to also show 74 the commit message before the differences. 75 76include::pretty-formats.txt[] 77 78--no-commit-id:: 79 git-diff-tree outputs a line with the commit ID when 80 applicable. This flag suppressed the commit ID output. 81 82-c:: 83 This flag changes the way a merge commit is displayed 84 (which means it is useful only when the command is given 85 one <tree-ish>, or '--stdin'). It shows the differences 86 from each of the parents to the merge result simultaneously 87 instead of showing pairwise diff between a parent and the 88 result one at a time (which is what the '-m' option does). 89 Furthermore, it lists only files which were modified 90 from all parents. 91 92--cc:: 93 This flag changes the way a merge commit patch is displayed, 94 in a similar way to the '-c' option. It implies the '-c' 95 and '-p' options and further compresses the patch output 96 by omitting hunks that show differences from only one 97 parent, or show the same change from all but one parent 98 for an Octopus merge. When this optimization makes all 99 hunks disappear, the commit itself and the commit log 100 message is not shown, just like in any other "empty diff" case. 101 102--always:: 103 Show the commit itself and the commit log message even 104 if the diff itself is empty. 105 106 107Limiting Output 108--------------- 109If you're only interested in differences in a subset of files, for 110example some architecture-specific files, you might do: 111 112 git-diff-tree -r <tree-ish> <tree-ish> arch/ia64 include/asm-ia64 113 114and it will only show you what changed in those two directories. 115 116Or if you are searching for what changed in just `kernel/sched.c`, just do 117 118 git-diff-tree -r <tree-ish> <tree-ish> kernel/sched.c 119 120and it will ignore all differences to other files. 121 122The pattern is always the prefix, and is matched exactly. There are no 123wildcards. Even stricter, it has to match a complete path component. 124I.e. "foo" does not pick up `foobar.h`. "foo" does match `foo/bar.h` 125so it can be used to name subdirectories. 126 127An example of normal usage is: 128 129 torvalds@ppc970:~/git> git-diff-tree 5319e4...... 130 *100664->100664 blob ac348b.......->a01513....... git-fsck-objects.c 131 132which tells you that the last commit changed just one file (it's from 133this one: 134 135----------------------------------------------------------------------------- 136commit 3c6f7ca19ad4043e9e72fa94106f352897e651a8 137tree 5319e4d609cdd282069cc4dce33c1db559539b03 138parent b4e628ea30d5ab3606119d2ea5caeab141d38df7 139author Linus Torvalds <torvalds@ppc970.osdl.org> Sat Apr 9 12:02:30 2005 140committer Linus Torvalds <torvalds@ppc970.osdl.org> Sat Apr 9 12:02:30 2005 141 142Make "git-fsck-objects" print out all the root commits it finds. 143 144Once I do the reference tracking, I'll also make it print out all the 145HEAD commits it finds, which is even more interesting. 146----------------------------------------------------------------------------- 147 148in case you care). 149 150Output format 151------------- 152include::diff-format.txt[] 153 154 155Author 156------ 157Written by Linus Torvalds <torvalds@osdl.org> 158 159Documentation 160-------------- 161Documentation by David Greaves, Junio C Hamano and the git-list <git@vger.kernel.org>. 162 163GIT 164--- 165Part of the gitlink:git[7] suite 166