Include external scripts by default

.buildkite/pipeline.extra.gradle

@@ -0,0 +1,5 @@
+buildkite.pipeline('extra') {
+    environment {
+        FOO = 'extra'
+    }
+}

build.gradle

@@ -95,6 +95,13 @@ buildkite {
         }
     }
 
+    // You can also add additional pipelines with a name other than the default.
+    pipeline 'secondary', {}
+
+    // You can also define pipelines in external script files inside your .buildkite directory matching the pattern 'buildkite*.gradle' and they will be
+    // included automatically. This is true by default.
+    includeScripts = true
+
     // There are also a few other things we can do besides define pipelines. Like set which versions of Buildkite
     // plugins we want to use.
     pluginVersion 'docker-compose', 'v3.0.3'

buildSrc/src/main/groovy/com/widen/plugins/buildkite/BuildkitePlugin.groovy

@@ -22,7 +22,16 @@ class BuildkitePlugin implements Plugin<Project> {
             }
         }
 
+        // Run anything that needs to be done after plugin configuration has been evaluated.
         project.afterEvaluate {
+            if (extension.includeScripts) {
+                project.fileTree(project.rootDir) {
+                    include '.buildkite/pipeline*.gradle'
+                }.each {
+                    project.apply from: it
+                }
+            }
+
             extension.pipelines.each { name, config ->
                 def taskName = name == 'default' ? 'uploadPipeline' : "upload${name}Pipeline"
 
@@ -45,6 +54,11 @@ class BuildkitePlugin implements Plugin<Project> {
         protected final Map<String, Closure<BuildkitePipeline>> pipelines = [:]
         protected Config config
 
+        /**
+         * Whether detected pipeline script files should be included automatically.
+         */
+        boolean includeScripts = true
+
         /**
          * Specify the version of a Buildkite plugin that should be used inside pipelines if no version is specified.
          */