supporting code for issue google#221

BUILD.bazel

@@ -4,3 +4,17 @@ package_group(
         "//...",
     ],
 )
+
+java_binary(
+    name = "CompileSoy",
+    srcs = ["CompileSoy.java"],
+    main_class = "main.CompileSoy",
+    deps = [
+        "//java/src/com/google/template/soy",
+        "//java/src/com/google/template/soy/error",
+        "//java/src/com/google/template/soy/error:soy_error_api",
+        "@maven//:com_google_guava_guava",
+        "@maven//:com_google_inject_extensions_guice_multibindings",
+        "@maven//:com_google_inject_guice",
+    ],
+)

CompileSoy.java

@@ -0,0 +1,28 @@
+package main;
+
+import java.io.File;
+
+import com.google.inject.Guice;
+import com.google.inject.Injector;
+import com.google.template.soy.SoyFileSet;
+import com.google.template.soy.SoyModule;
+import com.google.template.soy.error.SoyCompilationException;
+import com.google.template.soy.error.SoyError;
+
+public class CompileSoy {
+    public static void main(String[] args) throws Exception {
+        Injector injector = Guice.createInjector(new SoyModule());
+        SoyFileSet.Builder fsBuilder =
+            injector
+                .getInstance(SoyFileSet.Builder.class)
+                .setAllowExternalCalls(false)
+            .add(new File(args[0]));
+        try {
+            fsBuilder.build().compileTemplates();
+        } catch (SoyCompilationException e) {
+            for (SoyError err : e.getErrors()) {
+                System.out.println(err);
+            }
+        }
+    }
+}

test.soy

@@ -0,0 +1,8 @@
+{namespace main}
+
+{template .main}
+{@param appName: string}
+    <link rel="stylesheet"
+          type="text/css"
+          href="/{$appName}/public/stylesheets/styles.css">
+{/template}