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git-check-attr - Display gitattributes information

git check-attr [--source <tree-ish>] [-a | --all | <attr>…​] [--] <pathname>…​
git check-attr --stdin [-z] [--source <tree-ish>] [-a | --all | <attr>…​]

For every pathname, this command will list if each attribute is unspecified, set, or unset as a gitattribute on that pathname.

-a

--all

List all attributes that are associated with the specified paths. If this option is used, then unspecified attributes will not be included in the output.

--cached

Consider .gitattributes in the index only, ignoring the working tree.

--stdin

Read pathnames from the standard input, one per line, instead of from the command line.

-z

The output format is modified to be machine-parsable. If --stdin is also given, input paths are separated with a NUL character instead of a linefeed character.

--source=<tree-ish>

Check attributes against the specified tree-ish. It is common to specify the source tree by naming a commit, branch, or tag associated with it.

--

Interpret all preceding arguments as attributes and all following arguments as path names.

If none of --stdin, --all, or -- is used, the first argument will be treated as an attribute and the rest of the arguments as pathnames.

The output is of the form: <path> COLON SP <attribute> COLON SP <info> LF

unless -z is in effect, in which case NUL is used as delimiter: <path> NUL <attribute> NUL <info> NUL

<path> is the path of a file being queried, <attribute> is an attribute being queried, and <info> can be either:

unspecified

when the attribute is not defined for the path.

unset

when the attribute is defined as false.

set

when the attribute is defined as true.

<value>

when a value has been assigned to the attribute.

Buffering happens as documented under the GIT_FLUSH option in git[1]. The caller is responsible for avoiding deadlocks caused by overfilling an input buffer or reading from an empty output buffer.

In the examples, the following .gitattributes file is used:

• Listing a single attribute:

  $ git check-attr diff org/example/MyClass.java
  org/example/MyClass.java: diff: java

• Listing multiple attributes for a file:

  $ git check-attr crlf diff myAttr -- org/example/MyClass.java
  org/example/MyClass.java: crlf: unset
  org/example/MyClass.java: diff: java
  org/example/MyClass.java: myAttr: set

• Listing all attributes for a file:

  $ git check-attr --all -- org/example/MyClass.java
  org/example/MyClass.java: diff: java
  org/example/MyClass.java: myAttr: set

• Listing an attribute for multiple files:

  $ git check-attr myAttr -- org/example/MyClass.java org/example/NoMyAttr.java
  org/example/MyClass.java: myAttr: set
  org/example/NoMyAttr.java: myAttr: unspecified

• Not all values are equally unambiguous:

  $ git check-attr caveat README
  README: caveat: unspecified

gitattributes[5].

Part of the git[1] suite