Describe gradle setup

1 files changed, 45 insertions, 1 deletions

diff --git a/README.md b/README.md
index a0de394..f64ecfe 100644
--- a/README.md
+++ b/README.md
@@ -105,7 +105,51 @@ Ignore `classpath.txt`, since it will be different on every host
 
     classpath.txt
     ...
-    
+
+### Gradle
+
+Add this to your `build.gradle`:
+
+```gradle
+task vscodeClasspathFile {
+    description 'Generates classpath file for the Visual Studio Code java plugin'
+    ext.destFile = file("$buildDir/classpath.txt")
+    outputs.file destFile
+    doLast {
+        def classpathString = configurations.compile.collect{ it.absolutePath }.join(':')
+        assert destFile.parentFile.mkdir()
+        destFile.text = classpathString
+    }
+}
+
+task vscodeJavaconfigFile(dependsOn: vscodeClasspathFile) {
+    description 'Generates javaconfig.json file for the Visual Studio Code java plugin'
+
+    def relativePath = { File f ->
+        f.absolutePath - "${project.rootDir.absolutePath}/"
+    }
+    ext.destFile = file("javaconfig.json")
+    ext.config = [
+        sourcePath: sourceSets.collect{ it.java.srcDirs }.flatten().collect{ relativePath(it) },
+        classPathFile: relativePath(tasks.getByPath(':vscodeClasspathFile').outputs.files.singleFile),
+        outputDirectory: relativePath(new File(buildDir, 'vscode-classes'))
+    ]
+    doLast {
+        def jsonContent = groovy.json.JsonOutput.toJson(ext.config)
+        destFile.text = groovy.json.JsonOutput.prettyPrint(jsonContent)
+    }
+}
+
+task vscode(dependsOn: vscodeJavaconfigFile) {
+    description 'Generates config files for the Visual Studio Code java plugin'
+    group 'vscode'
+}
+```
+
+Then run `gradlew vscode`. This will generate
+* `javaconfig.json`
+* `build/classpath.txt`
+
 ## Directory structure
 
 ### Java service process