Updates to the google-java-format IntelliJ plugin.

* Add some more docs (both user-level and developer) to the README.md.
* Mark the plugin as available in all JetBrains IDEs.
* Mark it as unsupported in 2016.3. Which it is. (For now.)

MOE_MIGRATED_REVID=142272002

Author: plumpy

idea_plugin/README.md

@@ -1,5 +1,21 @@
-# google-java-format Intellij Plugin
+# google-java-format IntelliJ IDEA Plugin
+
+## Enabling
+
+The plugin will not be enabled by default. To enable it in the current project,
+go to "File→Settings...→google-java-format Settings" and check the "Enable"
+checkbox.
+
+To enable it by default in new projects, use "File→Other Settings→Default
+Settings...".
 
 ## Set-up
 
-Add `google-java-format*all-deps.jar` to `lib/`.
+1.  Build `google-java-format*all-deps.jar` by running `mvn install` in the
+    `core` directory.
+2.  Create a new "IntelliJ Platform Plugin" project.
+3.  Add the `google-java-format.iml` module to this project by doing
+    `File→New→Module from Existing Sources...` and selecting the `iml` file.
+4.  Under "File→Project Structure→Libraries" add
+    `core/target/google-java-format*all-deps.jar` file. IntelliJ will ask if you
+    want to add it as a dependency to the google-java-format module. You do.

idea_plugin/google-java-format.iml

@@ -10,6 +10,5 @@
     </content>
     <orderEntry type="inheritedJdk" />
     <orderEntry type="sourceFolder" forTests="false" />
-    <orderEntry type="library" name="google-java-format-1.1-20160728.050102-25-all-deps" level="project" />
   </component>
-</module>
+</module>

idea_plugin/resources/META-INF/plugin.xml

@@ -1,20 +1,30 @@
 <idea-plugin version="2">
   <id>google-java-format</id>
   <name>google-java-format</name>
-  <version>1.0</version>
+  <version>1.2.SNAPSHOT.20161216</version>
   <vendor url="https://github.com/google/google-java-format">
     Google
   </vendor>
 
+  <!-- Mark it as available on all JetBrains IDEs. It's really only useful in
+       IDEA and Android Studio, but there's no way to specify that for some
+       reason. It won't crash PyCharm or anything, so whatever. -->
+  <depends>com.intellij.modules.lang</depends>
+
   <description><![CDATA[
       Formats Java source code to comply with Google Style.
     ]]></description>
 
-  <idea-version since-build="141.0" until-build="163.0"/>
+  <!-- CodeStyleManager stayed the same from 143 (IDEA 15) through 162
+       (2016.2). But they changed a parameter type of a method in 163 (2016.3),
+       so it needs some work to fix. -->
+  <idea-version since-build="143.0" until-build="163.0"/>
 
   <project-components>
     <component>
-      <implementation-class>com.google.googlejavaformat.intellij.GoogleJavaFormatSettings</implementation-class>
+      <implementation-class>
+        com.google.googlejavaformat.intellij.GoogleJavaFormatSettings
+      </implementation-class>
       <loadForDefaultProject/>
     </component>
   </project-components>
@@ -25,4 +35,4 @@
                          displayName="google-java-format Settings"/>
   </extensions>
 
-</idea-plugin>
+</idea-plugin>