Open source all the tests under lib/syntax/.
--
MOS_MIGRATED_REVID=87244284
diff --git a/src/test/java/com/google/devtools/build/lib/syntax/SkylarkShell.java b/src/test/java/com/google/devtools/build/lib/syntax/SkylarkShell.java
new file mode 100644
index 0000000..6c394f9
--- /dev/null
+++ b/src/test/java/com/google/devtools/build/lib/syntax/SkylarkShell.java
@@ -0,0 +1,94 @@
+// Copyright 2015 Google Inc. All rights reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+package com.google.devtools.build.lib.syntax;
+
+import com.google.common.collect.ImmutableMap;
+import com.google.devtools.build.lib.events.Event;
+import com.google.devtools.build.lib.events.EventHandler;
+import com.google.devtools.build.lib.events.util.EventCollectionApparatus;
+import com.google.devtools.build.lib.packages.CachingPackageLocator;
+import com.google.devtools.build.lib.rules.SkylarkModules;
+import com.google.devtools.build.lib.vfs.Path;
+import com.google.devtools.build.lib.vfs.util.FsApparatus;
+
+import java.io.BufferedReader;
+import java.io.IOException;
+import java.io.InputStreamReader;
+
+/**
+ * SkylarkShell is a standalone shell executing Skylark. This is intended for
+ * testing purposes and not for end-users. This is very limited (environment is
+ * almost empty), but it can be used to play with the language and reproduce
+ * bugs. Imports and includes are not supported.
+ */
+class SkylarkShell {
+ static final EventCollectionApparatus syntaxEvents = new EventCollectionApparatus();
+ static final FsApparatus scratch = FsApparatus.newInMemory();
+ static final CachingPackageLocator locator = new AbstractParserTestCase.EmptyPackageLocator();
+ static final Path path = scratch.path("stdin");
+
+ private static void exec(String inputSource, Environment env) {
+ try {
+ ParserInputSource input = ParserInputSource.create(inputSource, path);
+ Lexer lexer = new Lexer(input, syntaxEvents.reporter());
+ Parser.ParseResult result =
+ Parser.parseFileForSkylark(lexer, syntaxEvents.reporter(), locator,
+ SkylarkModules.getValidationEnvironment(
+ ImmutableMap.<String, SkylarkType>of()));
+
+ Object last = null;
+ for (Statement st : result.statements) {
+ if (st instanceof ExpressionStatement) {
+ last = ((ExpressionStatement) st).getExpression().eval(env);
+ } else {
+ st.exec(env);
+ last = null;
+ }
+ }
+ if (last != null) {
+ System.out.println(last);
+ }
+ } catch (Throwable e) { // Catch everything to avoid killing the shell.
+ e.printStackTrace();
+ }
+ }
+
+ public static void main(String[] args) {
+ Environment env = SkylarkModules.getNewEnvironment(new EventHandler() {
+ @Override
+ public void handle(Event event) {
+ System.out.println(event.getMessage());
+ }
+ });
+ BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
+
+ String currentInput = "";
+ String line;
+ System.out.print(">> ");
+ try {
+ while ((line = br.readLine()) != null) {
+ if (line.isEmpty()) {
+ exec(currentInput, env);
+ currentInput = "";
+ System.out.print(">> ");
+ } else {
+ currentInput = currentInput + "\n" + line;
+ System.out.print(".. ");
+ }
+ }
+ } catch (IOException io) {
+ io.printStackTrace();
+ }
+ }
+}
