Print encoded errors only if data binding is invoked from the IDE

This CL makes Scope aware of execution environment. Now when invoked
from tests or via IDE, we'll print exceptions as encoded so that we
can parse them back. When user invokes from command line or any other
tool, we will print human readable errors.

The encoded error format may still change depending on conversations
w/ Studio team.

Bug: 21953001
Change-Id: I5bd3ea0cb6728e011225ee84d3e38817a2993a43

2 files changed, 18 insertions, 9 deletions

diff --git a/compilationTests/src/test/java/android/databinding/compilationTest/BaseCompilationTest.java b/compilationTests/src/test/java/android/databinding/compilationTest/BaseCompilationTest.java
index 51925d58..7682b742 100644
--- a/compilationTests/src/test/java/android/databinding/compilationTest/BaseCompilationTest.java
+++ b/compilationTests/src/test/java/android/databinding/compilationTest/BaseCompilationTest.java
@@ -49,6 +49,9 @@ import static org.junit.Assert.assertTrue;
 
 
 public class BaseCompilationTest {
+
+    private static final String PRINT_ENCODED_ERRORS_PROPERTY
+            = "android.databinding.injected.print.encoded.errors";
     @Rule
     public TestName name = new TestName();
     static Pattern VARIABLES = Pattern.compile("!@\\{([A-Za-z0-9_-]*)}");
@@ -92,8 +95,9 @@ public class BaseCompilationTest {
 
     /**
      * Extracts the text in the given location from the the at the given application path.
+     *
      * @param pathInApp The path, relative to the root of the application under test
-     * @param location The location to extract
+     * @param location  The location to extract
      * @return The string that is contained in the given location
      * @throws IOException If file is invalid.
      */
@@ -102,7 +106,7 @@ public class BaseCompilationTest {
         assertTrue(file.exists());
         StringBuilder result = new StringBuilder();
         List<String> lines = FileUtils.readLines(file);
-        for (int i = location.startLine; i <= location.endLine; i ++) {
+        for (int i = location.startLine; i <= location.endLine; i++) {
             if (i > location.startLine) {
                 result.append("\n");
             }
@@ -133,7 +137,7 @@ public class BaseCompilationTest {
     protected static Map<String, String> toMap(String... keysAndValues) {
         assertEquals(0, keysAndValues.length % 2);
         Map<String, String> map = new HashMap<>();
-        for (int i = 0; i < keysAndValues.length; i+=2) {
+        for (int i = 0; i < keysAndValues.length; i += 2) {
             map.put(keysAndValues[i], keysAndValues[i + 1]);
         }
         return map;
@@ -192,7 +196,8 @@ public class BaseCompilationTest {
         replacements = addDefaults(replacements);
         // how to get build folder, pass from gradle somehow ?
         FileUtils.forceMkdir(testFolder);
-        copyResourceTo("/AndroidManifest.xml", new File(testFolder, "app/src/main/AndroidManifest.xml"), replacements);
+        copyResourceTo("/AndroidManifest.xml",
+                new File(testFolder, "app/src/main/AndroidManifest.xml"), replacements);
         copyResourceTo("/project_build.gradle", new File(testFolder, "build.gradle"), replacements);
         copyResourceTo("/app_build.gradle", new File(testFolder, "app/build.gradle"), replacements);
         copyResourceTo("/settings.gradle", new File(testFolder, "settings.gradle"), replacements);
@@ -215,21 +220,24 @@ public class BaseCompilationTest {
         FileUtils.forceMkdir(moduleFolder);
         copyResourceTo("/AndroidManifest.xml",
                 new File(moduleFolder, "src/main/AndroidManifest.xml"), replacements);
-        copyResourceTo("/module_build.gradle", new File(moduleFolder, "build.gradle"), replacements);
+        copyResourceTo("/module_build.gradle", new File(moduleFolder, "build.gradle"),
+                replacements);
     }
 
-    protected CompilationResult runGradle(String... params) throws IOException, InterruptedException {
+    protected CompilationResult runGradle(String... params)
+            throws IOException, InterruptedException {
         setExecutable();
         File pathToExecutable = new File(testFolder, "gradlew");
         List<String> args = new ArrayList<>();
         args.add(pathToExecutable.getAbsolutePath());
+        args.add("-P" + PRINT_ENCODED_ERRORS_PROPERTY + "=true");
         args.add("--project-cache-dir");
         args.add(new File("../.caches/", name.getMethodName()).getAbsolutePath());
         Collections.addAll(args, params);
         ProcessBuilder builder = new ProcessBuilder(args);
         builder.environment().putAll(System.getenv());
         builder.directory(testFolder);
-        Process process =  builder.start();
+        Process process = builder.start();
         String output = IOUtils.toString(process.getInputStream());
         String error = IOUtils.toString(process.getErrorStream());
         int result = process.waitFor();
@@ -246,7 +254,8 @@ public class BaseCompilationTest {
         perms.add(PosixFilePermission.GROUP_READ);
         //add others permissions
         perms.add(PosixFilePermission.OTHERS_READ);
-        Files.setPosixFilePermissions(Paths.get(new File(testFolder, "gradlew").getAbsolutePath()), perms);
+        Files.setPosixFilePermissions(Paths.get(new File(testFolder, "gradlew").getAbsolutePath()),
+                perms);
     }
 
 
diff --git a/compilationTests/src/test/java/android/databinding/compilationTest/SimpleCompilationTest.java b/compilationTests/src/test/java/android/databinding/compilationTest/SimpleCompilationTest.java
index 877fe80a..e627c99f 100644
--- a/compilationTests/src/test/java/android/databinding/compilationTest/SimpleCompilationTest.java
+++ b/compilationTests/src/test/java/android/databinding/compilationTest/SimpleCompilationTest.java
@@ -66,7 +66,7 @@ public class SimpleCompilationTest extends BaseCompilationTest {
         CompilationResult result = runGradle("assembleDebug");
         assertNotEquals(0, result.resultCode);
         ScopedException scopedException = result.getBindingException();
-        assertNotNull(scopedException);
+        assertNotNull(result.error, scopedException);
         ScopedErrorReport report = scopedException.getScopedErrorReport();
         assertNotNull(report);
         assertEquals(1, report.getLocations().size());