320 lines
10 KiB
Plaintext
320 lines
10 KiB
Plaintext
git-cat-file(1)
|
|
===============
|
|
|
|
NAME
|
|
----
|
|
git-cat-file - Provide content or type and size information for repository objects
|
|
|
|
|
|
SYNOPSIS
|
|
--------
|
|
[verse]
|
|
'git cat-file' (-t [--allow-unknown-type]| -s [--allow-unknown-type]| -e | -p | <type> | --textconv | --filters ) [--path=<path>] <object>
|
|
'git cat-file' (--batch | --batch-check) [ --textconv | --filters ] [--follow-symlinks]
|
|
|
|
DESCRIPTION
|
|
-----------
|
|
In its first form, the command provides the content or the type of an object in
|
|
the repository. The type is required unless `-t` or `-p` is used to find the
|
|
object type, or `-s` is used to find the object size, or `--textconv` or
|
|
`--filters` is used (which imply type "blob").
|
|
|
|
In the second form, a list of objects (separated by linefeeds) is provided on
|
|
stdin, and the SHA-1, type, and size of each object is printed on stdout. The
|
|
output format can be overridden using the optional `<format>` argument. If
|
|
either `--textconv` or `--filters` was specified, the input is expected to
|
|
list the object names followed by the path name, separated by a single
|
|
whitespace, so that the appropriate drivers can be determined.
|
|
|
|
OPTIONS
|
|
-------
|
|
<object>::
|
|
The name of the object to show.
|
|
For a more complete list of ways to spell object names, see
|
|
the "SPECIFYING REVISIONS" section in linkgit:gitrevisions[7].
|
|
|
|
-t::
|
|
Instead of the content, show the object type identified by
|
|
<object>.
|
|
|
|
-s::
|
|
Instead of the content, show the object size identified by
|
|
<object>.
|
|
|
|
-e::
|
|
Exit with zero status if <object> exists and is a valid
|
|
object. If <object> is of an invalid format exit with non-zero and
|
|
emits an error on stderr.
|
|
|
|
-p::
|
|
Pretty-print the contents of <object> based on its type.
|
|
|
|
<type>::
|
|
Typically this matches the real type of <object> but asking
|
|
for a type that can trivially be dereferenced from the given
|
|
<object> is also permitted. An example is to ask for a
|
|
"tree" with <object> being a commit object that contains it,
|
|
or to ask for a "blob" with <object> being a tag object that
|
|
points at it.
|
|
|
|
--textconv::
|
|
Show the content as transformed by a textconv filter. In this case,
|
|
<object> has to be of the form <tree-ish>:<path>, or :<path> in
|
|
order to apply the filter to the content recorded in the index at
|
|
<path>.
|
|
|
|
--filters::
|
|
Show the content as converted by the filters configured in
|
|
the current working tree for the given <path> (i.e. smudge filters,
|
|
end-of-line conversion, etc). In this case, <object> has to be of
|
|
the form <tree-ish>:<path>, or :<path>.
|
|
|
|
--path=<path>::
|
|
For use with --textconv or --filters, to allow specifying an object
|
|
name and a path separately, e.g. when it is difficult to figure out
|
|
the revision from which the blob came.
|
|
|
|
--batch::
|
|
--batch=<format>::
|
|
Print object information and contents for each object provided
|
|
on stdin. May not be combined with any other options or arguments
|
|
except `--textconv` or `--filters`, in which case the input lines
|
|
also need to specify the path, separated by whitespace. See the
|
|
section `BATCH OUTPUT` below for details.
|
|
|
|
--batch-check::
|
|
--batch-check=<format>::
|
|
Print object information for each object provided on stdin. May
|
|
not be combined with any other options or arguments except
|
|
`--textconv` or `--filters`, in which case the input lines also
|
|
need to specify the path, separated by whitespace. See the
|
|
section `BATCH OUTPUT` below for details.
|
|
|
|
--batch-all-objects::
|
|
Instead of reading a list of objects on stdin, perform the
|
|
requested batch operation on all objects in the repository and
|
|
any alternate object stores (not just reachable objects).
|
|
Requires `--batch` or `--batch-check` be specified. Note that
|
|
the objects are visited in order sorted by their hashes.
|
|
|
|
--buffer::
|
|
Normally batch output is flushed after each object is output, so
|
|
that a process can interactively read and write from
|
|
`cat-file`. With this option, the output uses normal stdio
|
|
buffering; this is much more efficient when invoking
|
|
`--batch-check` on a large number of objects.
|
|
|
|
--unordered::
|
|
When `--batch-all-objects` is in use, visit objects in an
|
|
order which may be more efficient for accessing the object
|
|
contents than hash order. The exact details of the order are
|
|
unspecified, but if you do not require a specific order, this
|
|
should generally result in faster output, especially with
|
|
`--batch`. Note that `cat-file` will still show each object
|
|
only once, even if it is stored multiple times in the
|
|
repository.
|
|
|
|
--allow-unknown-type::
|
|
Allow -s or -t to query broken/corrupt objects of unknown type.
|
|
|
|
--follow-symlinks::
|
|
With --batch or --batch-check, follow symlinks inside the
|
|
repository when requesting objects with extended SHA-1
|
|
expressions of the form tree-ish:path-in-tree. Instead of
|
|
providing output about the link itself, provide output about
|
|
the linked-to object. If a symlink points outside the
|
|
tree-ish (e.g. a link to /foo or a root-level link to ../foo),
|
|
the portion of the link which is outside the tree will be
|
|
printed.
|
|
+
|
|
This option does not (currently) work correctly when an object in the
|
|
index is specified (e.g. `:link` instead of `HEAD:link`) rather than
|
|
one in the tree.
|
|
+
|
|
This option cannot (currently) be used unless `--batch` or
|
|
`--batch-check` is used.
|
|
+
|
|
For example, consider a git repository containing:
|
|
+
|
|
--
|
|
f: a file containing "hello\n"
|
|
link: a symlink to f
|
|
dir/link: a symlink to ../f
|
|
plink: a symlink to ../f
|
|
alink: a symlink to /etc/passwd
|
|
--
|
|
+
|
|
For a regular file `f`, `echo HEAD:f | git cat-file --batch` would print
|
|
+
|
|
--
|
|
ce013625030ba8dba906f756967f9e9ca394464a blob 6
|
|
--
|
|
+
|
|
And `echo HEAD:link | git cat-file --batch --follow-symlinks` would
|
|
print the same thing, as would `HEAD:dir/link`, as they both point at
|
|
`HEAD:f`.
|
|
+
|
|
Without `--follow-symlinks`, these would print data about the symlink
|
|
itself. In the case of `HEAD:link`, you would see
|
|
+
|
|
--
|
|
4d1ae35ba2c8ec712fa2a379db44ad639ca277bd blob 1
|
|
--
|
|
+
|
|
Both `plink` and `alink` point outside the tree, so they would
|
|
respectively print:
|
|
+
|
|
--
|
|
symlink 4
|
|
../f
|
|
|
|
symlink 11
|
|
/etc/passwd
|
|
--
|
|
|
|
|
|
OUTPUT
|
|
------
|
|
If `-t` is specified, one of the <type>.
|
|
|
|
If `-s` is specified, the size of the <object> in bytes.
|
|
|
|
If `-e` is specified, no output, unless the <object> is malformed.
|
|
|
|
If `-p` is specified, the contents of <object> are pretty-printed.
|
|
|
|
If <type> is specified, the raw (though uncompressed) contents of the <object>
|
|
will be returned.
|
|
|
|
BATCH OUTPUT
|
|
------------
|
|
|
|
If `--batch` or `--batch-check` is given, `cat-file` will read objects
|
|
from stdin, one per line, and print information about them. By default,
|
|
the whole line is considered as an object, as if it were fed to
|
|
linkgit:git-rev-parse[1].
|
|
|
|
You can specify the information shown for each object by using a custom
|
|
`<format>`. The `<format>` is copied literally to stdout for each
|
|
object, with placeholders of the form `%(atom)` expanded, followed by a
|
|
newline. The available atoms are:
|
|
|
|
`objectname`::
|
|
The 40-hex object name of the object.
|
|
|
|
`objecttype`::
|
|
The type of the object (the same as `cat-file -t` reports).
|
|
|
|
`objectsize`::
|
|
The size, in bytes, of the object (the same as `cat-file -s`
|
|
reports).
|
|
|
|
`objectsize:disk`::
|
|
The size, in bytes, that the object takes up on disk. See the
|
|
note about on-disk sizes in the `CAVEATS` section below.
|
|
|
|
`deltabase`::
|
|
If the object is stored as a delta on-disk, this expands to the
|
|
40-hex sha1 of the delta base object. Otherwise, expands to the
|
|
null sha1 (40 zeroes). See `CAVEATS` below.
|
|
|
|
`rest`::
|
|
If this atom is used in the output string, input lines are split
|
|
at the first whitespace boundary. All characters before that
|
|
whitespace are considered to be the object name; characters
|
|
after that first run of whitespace (i.e., the "rest" of the
|
|
line) are output in place of the `%(rest)` atom.
|
|
|
|
If no format is specified, the default format is `%(objectname)
|
|
%(objecttype) %(objectsize)`.
|
|
|
|
If `--batch` is specified, the object information is followed by the
|
|
object contents (consisting of `%(objectsize)` bytes), followed by a
|
|
newline.
|
|
|
|
For example, `--batch` without a custom format would produce:
|
|
|
|
------------
|
|
<sha1> SP <type> SP <size> LF
|
|
<contents> LF
|
|
------------
|
|
|
|
Whereas `--batch-check='%(objectname) %(objecttype)'` would produce:
|
|
|
|
------------
|
|
<sha1> SP <type> LF
|
|
------------
|
|
|
|
If a name is specified on stdin that cannot be resolved to an object in
|
|
the repository, then `cat-file` will ignore any custom format and print:
|
|
|
|
------------
|
|
<object> SP missing LF
|
|
------------
|
|
|
|
If a name is specified that might refer to more than one object (an ambiguous short sha), then `cat-file` will ignore any custom format and print:
|
|
|
|
------------
|
|
<object> SP ambiguous LF
|
|
------------
|
|
|
|
If --follow-symlinks is used, and a symlink in the repository points
|
|
outside the repository, then `cat-file` will ignore any custom format
|
|
and print:
|
|
|
|
------------
|
|
symlink SP <size> LF
|
|
<symlink> LF
|
|
------------
|
|
|
|
The symlink will either be absolute (beginning with a /), or relative
|
|
to the tree root. For instance, if dir/link points to ../../foo, then
|
|
<symlink> will be ../foo. <size> is the size of the symlink in bytes.
|
|
|
|
If --follow-symlinks is used, the following error messages will be
|
|
displayed:
|
|
|
|
------------
|
|
<object> SP missing LF
|
|
------------
|
|
is printed when the initial symlink requested does not exist.
|
|
|
|
------------
|
|
dangling SP <size> LF
|
|
<object> LF
|
|
------------
|
|
is printed when the initial symlink exists, but something that
|
|
it (transitive-of) points to does not.
|
|
|
|
------------
|
|
loop SP <size> LF
|
|
<object> LF
|
|
------------
|
|
is printed for symlink loops (or any symlinks that
|
|
require more than 40 link resolutions to resolve).
|
|
|
|
------------
|
|
notdir SP <size> LF
|
|
<object> LF
|
|
------------
|
|
is printed when, during symlink resolution, a file is used as a
|
|
directory name.
|
|
|
|
CAVEATS
|
|
-------
|
|
|
|
Note that the sizes of objects on disk are reported accurately, but care
|
|
should be taken in drawing conclusions about which refs or objects are
|
|
responsible for disk usage. The size of a packed non-delta object may be
|
|
much larger than the size of objects which delta against it, but the
|
|
choice of which object is the base and which is the delta is arbitrary
|
|
and is subject to change during a repack.
|
|
|
|
Note also that multiple copies of an object may be present in the object
|
|
database; in this case, it is undefined which copy's size or delta base
|
|
will be reported.
|
|
|
|
GIT
|
|
---
|
|
Part of the linkgit:git[1] suite
|