Add --error-on-failed-insert option to aapt.

The new SDK build system give the ability to insert
versionCode/Name and min/targetSdkVersion in the manifest
but aapt won't replace those if they already exist.

The main problem is that aapt doesn't actually fail when
it doesn't replace them, making the output not what the
developer wanted.

This patch set adds an option to aapt to make it return
an error if the insert failed because the attribute
already existed.

Change-Id: I8938ec1238da407a8562c974e9598db39001ffd9

Author: Xavier Ducrohet

tools/aapt/Bundle.h

@@ -61,7 +61,7 @@ class Bundle {
           mMinSdkVersion(NULL), mTargetSdkVersion(NULL), mMaxSdkVersion(NULL),
           mVersionCode(NULL), mVersionName(NULL), mCustomPackage(NULL), mExtraPackages(NULL),
           mMaxResVersion(NULL), mDebugMode(false), mNonConstantId(false), mProduct(NULL),
-          mUseCrunchCache(false), mArgc(0), mArgv(NULL)
+          mUseCrunchCache(false), mErrorOnFailedInsert(false), mArgc(0), mArgv(NULL)
         {}
     ~Bundle(void) {}
 
@@ -110,6 +110,8 @@ class Bundle {
     void setAutoAddOverlay(bool val) { mAutoAddOverlay = val; }
     bool getGenDependencies() { return mGenDependencies; }
     void setGenDependencies(bool val) { mGenDependencies = val; }
+    bool getErrorOnFailedInsert() { return mErrorOnFailedInsert; }
+    void setErrorOnFailedInsert(bool val) { mErrorOnFailedInsert = val; }
 
     bool getUTF16StringsOption() {
         return mWantUTF16 || !isMinSdkAtLeast(SDK_FROYO);
@@ -276,6 +278,7 @@ class Bundle {
     bool        mNonConstantId;
     const char* mProduct;
     bool        mUseCrunchCache;
+    bool        mErrorOnFailedInsert;
 
     /* file specification */
     int         mArgc;

tools/aapt/Main.cpp

@@ -177,6 +177,11 @@ void usage(void)
         "       Make the resources ID non constant. This is required to make an R java class\n"
         "       that does not contain the final value but is used to make reusable compiled\n"
         "       libraries that need to access resources.\n"
+        "   --error-on-failed-insert\n"
+        "       Forces aapt to return an error if it fails to insert values into the manifest\n"
+        "       with --debug-mode, --min-sdk-version, --target-sdk-version --version-code\n"
+        "       and --version-name.\n"
+        "       Insertion typically fails if the manifest already defines the attribute.\n"
         "   --ignore-assets\n"
         "       Assets to be ignored. Default pattern is:\n"
         "       %s\n",
@@ -542,6 +547,8 @@ int main(int argc, char* const argv[])
                     bundle.setInstrumentationPackageNameOverride(argv[0]);
                 } else if (strcmp(cp, "-auto-add-overlay") == 0) {
                     bundle.setAutoAddOverlay(true);
+                } else if (strcmp(cp, "-error-on-failed-insert") == 0) {
+                    bundle.setErrorOnFailedInsert(true);
                 } else if (strcmp(cp, "-product") == 0) {
                     argc--;
                     argv++;

tools/aapt/Resource.cpp

@@ -673,24 +673,40 @@ static bool applyFileOverlay(Bundle *bundle,
     return true;
 }
 
-void addTagAttribute(const sp<XMLNode>& node, const char* ns8,
-        const char* attr8, const char* value)
+/*
+ * Inserts an attribute in a given node, only if the attribute does not
+ * exist.
+ * If errorOnFailedInsert is true, and the attribute already exists, returns false.
+ * Returns true otherwise, even if the attribute already exists.
+ */
+bool addTagAttribute(const sp<XMLNode>& node, const char* ns8,
+        const char* attr8, const char* value, bool errorOnFailedInsert)
 {
     if (value == NULL) {
-        return;
+        return true;
     }
-    
+
     const String16 ns(ns8);
     const String16 attr(attr8);
-    
+
     if (node->getAttribute(ns, attr) != NULL) {
+        if (errorOnFailedInsert) {
+            fprintf(stderr, "Error: AndroidManifest.xml already defines %s (in %s);"
+                            " cannot insert new value %s.\n",
+                    String8(attr).string(), String8(ns).string(), value);
+            return false;
+        }
+
         fprintf(stderr, "Warning: AndroidManifest.xml already defines %s (in %s);"
                         " using existing value in manifest.\n",
                 String8(attr).string(), String8(ns).string());
-        return;
+
+        // don't stop the build.
+        return true;
     }
 
     node->addAttribute(ns, attr, String16(value));
+    return true;
 }
 
 static void fullyQualifyClassName(const String8& package, sp<XMLNode> node,
@@ -728,11 +744,17 @@ status_t massageManifest(Bundle* bundle, sp<XMLNode> root)
         fprintf(stderr, "No <manifest> tag.\n");
         return UNKNOWN_ERROR;
     }
-    
-    addTagAttribute(root, RESOURCES_ANDROID_NAMESPACE, "versionCode",
-            bundle->getVersionCode());
-    addTagAttribute(root, RESOURCES_ANDROID_NAMESPACE, "versionName",
-            bundle->getVersionName());
+
+    bool errorOnFailedInsert = bundle->getErrorOnFailedInsert();
+
+    if (!addTagAttribute(root, RESOURCES_ANDROID_NAMESPACE, "versionCode",
+            bundle->getVersionCode(), errorOnFailedInsert)) {
+        return UNKNOWN_ERROR;
+    }
+    if (!addTagAttribute(root, RESOURCES_ANDROID_NAMESPACE, "versionName",
+            bundle->getVersionName(), errorOnFailedInsert)) {
+        return UNKNOWN_ERROR;
+    }
 
     if (bundle->getMinSdkVersion() != NULL
             || bundle->getTargetSdkVersion() != NULL
@@ -743,18 +765,27 @@ status_t massageManifest(Bundle* bundle, sp<XMLNode> root)
             root->insertChildAt(vers, 0);
         }
 
-        addTagAttribute(vers, RESOURCES_ANDROID_NAMESPACE, "minSdkVersion",
-                bundle->getMinSdkVersion());
-        addTagAttribute(vers, RESOURCES_ANDROID_NAMESPACE, "targetSdkVersion",
-                bundle->getTargetSdkVersion());
-        addTagAttribute(vers, RESOURCES_ANDROID_NAMESPACE, "maxSdkVersion",
-                bundle->getMaxSdkVersion());
+        if (!addTagAttribute(vers, RESOURCES_ANDROID_NAMESPACE, "minSdkVersion",
+                bundle->getMinSdkVersion(), errorOnFailedInsert)) {
+            return UNKNOWN_ERROR;
+        }
+        if (!addTagAttribute(vers, RESOURCES_ANDROID_NAMESPACE, "targetSdkVersion",
+                bundle->getTargetSdkVersion(), errorOnFailedInsert)) {
+            return UNKNOWN_ERROR;
+        }
+        if (!addTagAttribute(vers, RESOURCES_ANDROID_NAMESPACE, "maxSdkVersion",
+                bundle->getMaxSdkVersion(), errorOnFailedInsert)) {
+            return UNKNOWN_ERROR;
+        }
     }
 
     if (bundle->getDebugMode()) {
         sp<XMLNode> application = root->getChildElement(String16(), String16("application"));
         if (application != NULL) {
-            addTagAttribute(application, RESOURCES_ANDROID_NAMESPACE, "debuggable", "true");
+            if (!addTagAttribute(application, RESOURCES_ANDROID_NAMESPACE, "debuggable", "true",
+                    errorOnFailedInsert)) {
+                return UNKNOWN_ERROR;
+            }
         }
     }