Replace current complex delta visitor by pattern based ones.

The build system relies on several different delta visitor that
detect file changes to detect that needs to be rebuilt but the
implementation of those files is based on going through
folders recursively while keeping states. This is complex
and prone to errors.

The new mechanism is simply based on glob-pattern, relative
to the project root.
A set of predefined patterns stored in ChangedFileSet instance
allow quick reuse.
ChangeFileSetHelper stores those as well as allow creating
others that are based on a project config (such as the output
folder).

This first CL replace the previous delta visitors in the
PostCompilerBuilder. Replacing the ones in the PreCompilerBuilder
will require a bit more work so I prefer splitting it in another
CL.

The code that runs the pattern recognition is coming from
Ant and is stored in external/ant-glob. This is not all of Ant
but a subset of the classes for our need.
This CL does include a simple set of tests for the extracted
Ant classes.

Change-Id: I2ad1b116ffb29c9f4195d863d04f8812e87a31ca

4 files changed, 68 insertions, 0 deletions

diff --git a/ant-glob-tests/.classpath b/ant-glob-tests/.classpath
new file mode 100644
index 0000000..0a4978e
--- /dev/null
+++ b/ant-glob-tests/.classpath
@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<classpath>
+	<classpathentry kind="src" path="src"/>
+	<classpathentry kind="con" path="org.eclipse.jdt.launching.JRE_CONTAINER"/>
+	<classpathentry kind="con" path="org.eclipse.jdt.junit.JUNIT_CONTAINER/3"/>
+	<classpathentry combineaccessrules="false" kind="src" path="/ant-glob"/>
+	<classpathentry kind="output" path="bin"/>
+</classpath>
diff --git a/ant-glob-tests/.gitignore b/ant-glob-tests/.gitignore
new file mode 100644
index 0000000..3826f65
--- /dev/null
+++ b/ant-glob-tests/.gitignore
@@ -0,0 +1,6 @@
+bin
+*~
+*.bak
+Thumbs.db
+*.class
+*.DS_Store
diff --git a/ant-glob-tests/.project b/ant-glob-tests/.project
new file mode 100644
index 0000000..4686cc9
--- /dev/null
+++ b/ant-glob-tests/.project
@@ -0,0 +1,17 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<projectDescription>
+	<name>ant-glob-tests</name>
+	<comment></comment>
+	<projects>
+	</projects>
+	<buildSpec>
+		<buildCommand>
+			<name>org.eclipse.jdt.core.javabuilder</name>
+			<arguments>
+			</arguments>
+		</buildCommand>
+	</buildSpec>
+	<natures>
+		<nature>org.eclipse.jdt.core.javanature</nature>
+	</natures>
+</projectDescription>
diff --git a/ant-glob-tests/src/org/apache/tools/ant/types/selectors/SelectorUtilsTest.java b/ant-glob-tests/src/org/apache/tools/ant/types/selectors/SelectorUtilsTest.java
new file mode 100644
index 0000000..943ebd5
--- /dev/null
+++ b/ant-glob-tests/src/org/apache/tools/ant/types/selectors/SelectorUtilsTest.java
@@ -0,0 +1,37 @@
+/*
+ * Copyright (C) 2012 The Android Open Source Project
+ *
+ * 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 org.apache.tools.ant.types.selectors;
+
+import junit.framework.TestCase;
+
+
+public class SelectorUtilsTest extends TestCase {
+
+    public void test1() {
+        assertTrue(SelectorUtils.matchPath("**", "a"));
+
+        assertTrue(SelectorUtils.matchPath("a/**/b", "a/c/d/b"));
+        assertTrue(SelectorUtils.matchPath("a/**/b", "a/b"));
+        assertFalse(SelectorUtils.matchPath("a/**/b", "a/b/c"));
+
+        assertTrue(SelectorUtils.matchPath("a/**", "a"));
+        assertTrue(SelectorUtils.matchPath("a/**", "a/b"));
+
+        assertTrue(SelectorUtils.matchPath("bin/**/*.class", "bin/a/foo.class"));
+        assertFalse(SelectorUtils.matchPath("bin/**/*.class", "bin/a/fooclass"));
+    }
+}