SYNOPSIS
--------
-$GIT_DIR/info/attributes, gitattributes
+$GIT_DIR/info/attributes, .gitattributes
DESCRIPTION
These attributes affect how the contents stored in the
repository are copied to the working tree files when commands
-such as `git checkout` and `git merge` run. They also affect how
+such as 'git-checkout' and 'git-merge' run. They also affect how
git stores the contents you prepare in the working tree in the
-repository upon `git add` and `git commit`.
+repository upon 'git-add' and 'git-commit'.
`crlf`
^^^^^^
Unset::
- Unsetting the `crlf` attribute on a path is meant to
- mark the path as a "binary" file. The path never goes
- through line endings conversion upon checkin/checkout.
+ Unsetting the `crlf` attribute on a path tells git not to
+ attempt any end-of-line conversion upon checkin or checkout.
Unspecified::
a conversion done to the files in the work tree, but there are a
few exceptions. Even though...
-- "git add" itself does not touch the files in the work tree, the
+- 'git-add' itself does not touch the files in the work tree, the
next checkout would, so the safety triggers;
-- "git apply" to update a text file with a patch does touch the files
+- 'git-apply' to update a text file with a patch does touch the files
in the work tree, but the operation is about text files and CRLF
conversion is about fixing the line ending inconsistencies, so the
safety does not trigger;
-- "git diff" itself does not touch the files in the work tree, it is
- often run to inspect the changes you intend to next "git add". To
+- 'git-diff' itself does not touch the files in the work tree, it is
+ often run to inspect the changes you intend to next 'git-add'. To
catch potential problems early, safety triggers.
Generating diff text
~~~~~~~~~~~~~~~~~~~~
-The attribute `diff` affects if `git diff` generates textual
+The attribute `diff` affects if 'git-diff' generates textual
patch for the path or just says `Binary files differ`. It also
can affect what line is shown on the hunk header `@@ -k,l +n,m @@`
line.
The text is called 'hunk header', and by default a line that
begins with an alphabet, an underscore or a dollar sign is used,
-which matches what GNU `diff -p` output uses. This default
+which matches what GNU 'diff -p' output uses. This default
selection however is not suited for some contents, and you can
use customized pattern to make a selection.
There are a few built-in patterns to make this easier, and `tex`
is one of them, so you do not have to write the above in your
configuration file (you still need to enable this with the
-attribute mechanism, via `.gitattributes`). Another built-in
-pattern is defined for `java` that defines a pattern suitable
-for program text in Java language.
+attribute mechanism, via `.gitattributes`). The following built in
+patterns are available:
+
+- `bibtex` suitable for files with BibTeX coded references.
+
+- `java` suitable for source code in the Java lanugage.
+
+- `pascal` suitable for source code in the Pascal/Delphi language.
+
+- `ruby` suitable for source code in the Ruby language.
+
+- `tex` suitable for source code for LaTeX documents.
Performing a three-way merge
Set::
Built-in 3-way merge driver is used to merge the
- contents in a way similar to `merge` command of `RCS`
+ contents in a way similar to 'merge' command of `RCS`
suite. This is suitable for ordinary text files.
Unset::
^^^^^^^^^^^^
The `core.whitespace` configuration variable allows you to define what
-`diff` and `apply` should consider whitespace errors for all paths in
+'diff' and 'apply' should consider whitespace errors for all paths in
the project (See linkgit:git-config[1]). This attribute gives you finer
control per path.
Creating an archive
~~~~~~~~~~~~~~~~~~~
+`export-ignore`
+^^^^^^^^^^^^^^^
+
+Files and directories with the attribute `export-ignore` won't be added to
+archive files.
+
`export-subst`
^^^^^^^^^^^^^^
If the attribute `export-subst` is set for a file then git will expand
several placeholders when adding this file to an archive. The
-expansion depends on the availability of a commit ID, i.e. if
+expansion depends on the availability of a commit ID, i.e., if
linkgit:git-archive[1] has been given a tree instead of a commit or a
tag then no replacement will be done. The placeholders are the same
as those for the option `--pretty=format:` of linkgit:git-log[1],
commit hash.
+USING ATTRIBUTE MACROS
+----------------------
+
+You do not want any end-of-line conversions applied to, nor textual diffs
+produced for, any binary file you track. You would need to specify e.g.
+
+------------
+*.jpg -crlf -diff
+------------
+
+but that may become cumbersome, when you have many attributes. Using
+attribute macros, you can specify groups of attributes set or unset at
+the same time. The system knows a built-in attribute macro, `binary`:
+
+------------
+*.jpg binary
+------------
+
+which is equivalent to the above. Note that the attribute macros can only
+be "Set" (see the above example that sets "binary" macro as if it were an
+ordinary attribute --- setting it in turn unsets "crlf" and "diff").
+
+
+DEFINING ATTRIBUTE MACROS
+-------------------------
+
+Custom attribute macros can be defined only in the `.gitattributes` file
+at the toplevel (i.e. not in any subdirectory). The built-in attribute
+macro "binary" is equivalent to:
+
+------------
+[attr]binary -diff -crlf
+------------
+
+
EXAMPLE
-------