6 git-cat-file - Provide content or type and size information for repository objects
12 'git cat-file' (-t [--allow-unknown-type]| -s [--allow-unknown-type]| -e | -p | <type> | --textconv ) <object>
13 'git cat-file' (--batch | --batch-check) < <list-of-objects>
17 In its first form, the command provides the content or the type of an object in
18 the repository. The type is required unless '-t' or '-p' is used to find the
19 object type, or '-s' is used to find the object size, or '--textconv' is used
20 (which implies type "blob").
22 In the second form, a list of objects (separated by linefeeds) is provided on
23 stdin, and the SHA-1, type, and size of each object is printed on stdout.
28 The name of the object to show.
29 For a more complete list of ways to spell object names, see
30 the "SPECIFYING REVISIONS" section in linkgit:gitrevisions[7].
33 Instead of the content, show the object type identified by
37 Instead of the content, show the object size identified by
41 Suppress all output; instead exit with zero status if <object>
42 exists and is a valid object.
45 Pretty-print the contents of <object> based on its type.
48 Typically this matches the real type of <object> but asking
49 for a type that can trivially be dereferenced from the given
50 <object> is also permitted. An example is to ask for a
51 "tree" with <object> being a commit object that contains it,
52 or to ask for a "blob" with <object> being a tag object that
56 Show the content as transformed by a textconv filter. In this case,
57 <object> has be of the form <tree-ish>:<path>, or :<path> in order
58 to apply the filter to the content recorded in the index at <path>.
62 Print object information and contents for each object provided
63 on stdin. May not be combined with any other options or arguments.
64 See the section `BATCH OUTPUT` below for details.
67 --batch-check=<format>::
68 Print object information for each object provided on stdin. May
69 not be combined with any other options or arguments. See the
70 section `BATCH OUTPUT` below for details.
72 --allow-unknown-type::
73 Allow -s or -t to query broken/corrupt objects of unknown type.
77 If '-t' is specified, one of the <type>.
79 If '-s' is specified, the size of the <object> in bytes.
81 If '-e' is specified, no output.
83 If '-p' is specified, the contents of <object> are pretty-printed.
85 If <type> is specified, the raw (though uncompressed) contents of the <object>
91 If `--batch` or `--batch-check` is given, `cat-file` will read objects
92 from stdin, one per line, and print information about them. By default,
93 the whole line is considered as an object, as if it were fed to
94 linkgit:git-rev-parse[1].
96 You can specify the information shown for each object by using a custom
97 `<format>`. The `<format>` is copied literally to stdout for each
98 object, with placeholders of the form `%(atom)` expanded, followed by a
99 newline. The available atoms are:
102 The 40-hex object name of the object.
105 The type of of the object (the same as `cat-file -t` reports).
108 The size, in bytes, of the object (the same as `cat-file -s`
112 The size, in bytes, that the object takes up on disk. See the
113 note about on-disk sizes in the `CAVEATS` section below.
116 If the object is stored as a delta on-disk, this expands to the
117 40-hex sha1 of the delta base object. Otherwise, expands to the
118 null sha1 (40 zeroes). See `CAVEATS` below.
121 If this atom is used in the output string, input lines are split
122 at the first whitespace boundary. All characters before that
123 whitespace are considered to be the object name; characters
124 after that first run of whitespace (i.e., the "rest" of the
125 line) are output in place of the `%(rest)` atom.
127 If no format is specified, the default format is `%(objectname)
128 %(objecttype) %(objectsize)`.
130 If `--batch` is specified, the object information is followed by the
131 object contents (consisting of `%(objectsize)` bytes), followed by a
134 For example, `--batch` without a custom format would produce:
137 <sha1> SP <type> SP <size> LF
141 Whereas `--batch-check='%(objectname) %(objecttype)'` would produce:
147 If a name is specified on stdin that cannot be resolved to an object in
148 the repository, then `cat-file` will ignore any custom format and print:
151 <object> SP missing LF
158 Note that the sizes of objects on disk are reported accurately, but care
159 should be taken in drawing conclusions about which refs or objects are
160 responsible for disk usage. The size of a packed non-delta object may be
161 much larger than the size of objects which delta against it, but the
162 choice of which object is the base and which is the delta is arbitrary
163 and is subject to change during a repack.
165 Note also that multiple copies of an object may be present in the object
166 database; in this case, it is undefined which copy's size or delta base
171 Part of the linkgit:git[1] suite