Small tool to print the target graph of Ant builds.

Change-Id: I3ac594477aae6db08178b4def14f8da587ed06d1

2 files changed, 169 insertions, 0 deletions

diff --git a/anttargetprint/src/com/android/anttargetprint/BuildXmlHandler.java b/anttargetprint/src/com/android/anttargetprint/BuildXmlHandler.java
new file mode 100644
index 0000000..e9bc4f3
--- /dev/null
+++ b/anttargetprint/src/com/android/anttargetprint/BuildXmlHandler.java
@@ -0,0 +1,108 @@
+/*
+ * 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 com.android.anttargetprint;
+
+import org.xml.sax.Attributes;
+import org.xml.sax.SAXException;
+import org.xml.sax.helpers.DefaultHandler;
+
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import java.util.Map.Entry;
+
+public class BuildXmlHandler extends DefaultHandler {
+
+    private Map<String, String> mTargets = new HashMap<String, String>();
+    private int mLevel = 0;
+
+    @Override
+    public void startElement(String uri, String localName, String qName, Attributes attributes)
+            throws SAXException {
+
+        mLevel++;
+
+        if (mLevel == 2 && "target".equals(qName)) {
+            String name = attributes.getValue("name");
+            String depends = attributes.getValue("depends");
+
+            if (name != null) {
+                if (depends == null) {
+                    depends = "";
+                }
+
+                mTargets.put(name, depends);
+            }
+        }
+
+        super.startElement(uri, localName, qName, attributes);
+    }
+
+    @Override
+    public void endElement(String uri, String localName, String qName) throws SAXException {
+        mLevel--;
+        super.endElement(uri, localName, qName);
+    }
+
+    Map<String, List<String>> processTargets() {
+        HashMap<String, List<String>> result = new HashMap<String, List<String>>();
+
+        for (Entry<String, String> entry : mTargets.entrySet()) {
+            process(entry.getKey(), entry.getValue(), result);
+        }
+
+        return result;
+    }
+
+    private List<String> process(String targetName, String targetDepends,
+            Map<String, List<String>> resultMap) {
+
+        // first check if this was already processed.
+        List<String> resultList = resultMap.get(targetName);
+        if (resultList != null) {
+            return resultList;
+        }
+
+        resultList = new ArrayList<String>();
+
+        if (targetDepends.length() > 0) {
+            String[] dependencies = targetDepends.split(",");
+
+            for (String dependency : dependencies) {
+                String dependencyTrim = dependency.trim();
+                // get all the dependencies for this targets.
+                List<String> dependencyList = resultMap.get(dependencyTrim);
+                if (dependencyList == null) {
+                    dependencyList = process(dependencyTrim, mTargets.get(dependencyTrim),
+                            resultMap);
+                }
+
+                // add those to the new result list
+                resultList.addAll(dependencyList);
+
+                // and add this dependency as well
+                resultList.add(dependencyTrim);
+            }
+        }
+
+        resultMap.put(targetName, resultList);
+
+        return resultList;
+    }
+
+}
diff --git a/anttargetprint/src/com/android/anttargetprint/Main.java b/anttargetprint/src/com/android/anttargetprint/Main.java
new file mode 100644
index 0000000..e270d97
--- /dev/null
+++ b/anttargetprint/src/com/android/anttargetprint/Main.java
@@ -0,0 +1,61 @@
+/*
+ * 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 com.android.anttargetprint;
+
+import java.io.File;
+import java.util.List;
+import java.util.Map.Entry;
+
+import javax.xml.parsers.SAXParser;
+import javax.xml.parsers.SAXParserFactory;
+
+
+public class Main {
+
+    /**
+     * @param args
+     */
+    public static void main(String[] args) {
+
+        if (args.length != 1) {
+            System.err.println("USAGE: <prog> [FILE]");
+            System.exit(1);
+        }
+
+        try {
+            SAXParser parser = SAXParserFactory.newInstance().newSAXParser();
+            BuildXmlHandler handler = new BuildXmlHandler();
+            parser.parse(new File(args[0]), handler);
+
+            for (Entry<String, List<String>> entry : handler.processTargets().entrySet()) {
+                String name = entry.getKey();
+                if (name.charAt(0) != '-') {
+                    System.out.print(entry.getKey());
+                    System.out.print(" : ");
+                    for (String v : entry.getValue()) {
+                        System.out.print(v);
+                        System.out.print(" > ");
+                    }
+                    System.out.println();
+                }
+            }
+
+        } catch (Exception e) {
+            e.printStackTrace();
+        }
+    }
+}