# google-java-format

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***Release version:*** *0.1-alpha*
***Snapshot version:*** *0.1-SNAPSHOT*

`google-java-format` is a program that reformats Java source code to comply with
[Google Java Style][].

[Google Java Style]: http://google-styleguide.googlecode.com/svn/trunk/javaguide.html


Using the formtter from the command-line
----------------------------------------

First [download the formatter](https://github.com/google/google-java-format/releases)
and save it where you wish.  Then simply run it via:

```
java -jar /path/to/google-java-format-0.1-alpha.jar <options> [files...]
```

The formatter can act on whole files, on limited lines (`--lines`), on specific
ofsets (`--offset`), passing through to standard-out (default) or altered
in-place (`--replace`).

***Note:*** *There is no configurability as to the formatter's algorithm for
formatting.  This is a deliberate design decision to unify our
code formatting on a single format.*

Using the formatter in code-generators
--------------------------------------

The formatter can be used in software which generates java to output more
legible java code.  Just include the library in your maven/gradle/etc.
configuration.

#### Maven

```xml
<dependency>
  <groupId>com.google.googlejavaformat</groupId>
  <artifactId>google-java-format</artifactId>
  <version>0.1-alpha</version>
</dependency>
```

#### Gradle

```groovy
dependencies {
  compile 'com.google.googlejavaformat:google-java-format:0.1-alpha'
}
```

You can then use the formatter quite simply using the various `formatSource`
methods.  E.g.

```java
String formattedSource = Formatter.formatSource(sourceString);
```

or

```java
CharSource source = ...
CharSink output = ...
Formatter.formatSource(source, output);
```

Generally speaking, your starting point should be the static methods found
in `com.google.googlejavaformat.java.Formatter`.

Building from source
--------------------

To build google-java-format from source, you will need copy IntelliJ's
platform JARs from a local IntelliJ install; see
[`install-idea-jars.sh`](idea_plugin/src/main/scripts/install-idea-jars.sh).
Alternatively, you can skip building the IntelliJ plugin:

    mvn -pl '!idea_plugin' install

Contributing
------------

Please see [the contributors guide](CONTRIBUTING.md) for details.

License
-------

```text
Copyright 2015 Google Inc.

Licensed under the Apache License, Version 2.0 (the "License"); you may not
use this file except in compliance with the License. You may obtain a copy of
the License at

    http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
License for the specific language governing permissions and limitations under
the License.
```