1 files changed, 102 insertions, 0 deletions
diff --git a/bundle2installable/src/java/com/android/tools/appbundle/bundle2installable/NativeProcessor.java b/bundle2installable/src/java/com/android/tools/appbundle/bundle2installable/NativeProcessor.java
new file mode 100644
index 0000000..e742621
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+++ b/bundle2installable/src/java/com/android/tools/appbundle/bundle2installable/NativeProcessor.java
@@ -0,0 +1,102 @@
+/*
+ * Copyright (C) 2017 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.tools.appbundle.bundle2installable;
+
+import com.android.tools.appbundle.bundle2installable.util.Pair;
+import com.android.tools.appbundle.bundle2installable.util.PathUtils;
+import com.android.tools.appbundle.bundle2installable.util.ZipWalker;
+import java.io.IOException;
+import java.nio.file.Path;
+import java.nio.file.Paths;
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.HashSet;
+import java.util.List;
+import java.util.Map;
+import java.util.Set;
+import java.util.zip.ZipEntry;
+import java.util.zip.ZipFile;
+
+/**
+ * Processes native library directory and discovers cpu variants.
+ *
+ * Currently, expects ABI to be expressed as a subdirectory name inside "native" directory.
+ * The libraries are outputted to the "lib" directory as per APK standard.
+ */
+public class NativeProcessor implements ZipWalker.ZipEntryListener, VariantProcessor {
+
+  private static final String NATIVE_DIR = "native";
+  private static final String DESTINATION_DIR = "lib";
+
+  private Map<String, List<ZipEntry>> variantLibsMap;
+  private List<ZipEntry> nonVariantLibs;
+
+  public NativeProcessor() {
+    this.variantLibsMap = new HashMap<>();
+    this.nonVariantLibs = new ArrayList<>();
+  }
+
+  public void notify(ZipFile bundle, ZipEntry entry) throws IOException {
+    Path p = Paths.get(entry.getName());
+    if (PathUtils.isInsideTopDirectory(p, NATIVE_DIR)) {
+      String variant = PathUtils.resolveVariant(p);
+      if (variant != null) {
+        if (!variantLibsMap.containsKey(variant)) {
+          variantLibsMap.put(variant, new ArrayList<>());
+        }
+        variantLibsMap.get(variant).add(entry);
+      } else { // inside the libs directory
+        if (!entry.isDirectory()) {
+          // aapt2 doesn't strip any files in libs/ top-level. So we should
+          // include them in each variant as well.
+          nonVariantLibs.add(entry);
+        }
+      }
+    }
+  }
+
+  public List<String> getAllVariants() {
+    return new ArrayList<>(variantLibsMap.keySet());
+  }
+
+  /**
+   * Returns pair of zip entries and the destination path in the split for the variant
+   */
+  public List<Pair<ZipEntry, String>> generateForVariant(String variant) {
+    List<Pair<ZipEntry, String>> res = new ArrayList<>();
+    Set<String> coveredFiles = new HashSet<>();
+    if (!variantLibsMap.containsKey(variant)) {
+      throw new IllegalStateException(
+          String.format("Variant '%s' doesn't exist for the native libraries.", variant));
+    } else {
+      for (ZipEntry entry : variantLibsMap.get(variant)) {
+        String pathWithoutVariant = PathUtils.getFilePathWithoutVariant(entry.getName());
+        coveredFiles.add(pathWithoutVariant);
+        // our destination path needs to include architecture/variant though
+        Path destinationPath = Paths.get(DESTINATION_DIR, variant, pathWithoutVariant);
+        res.add(Pair.of(entry, destinationPath.toString()));
+      }
+    }
+    for (ZipEntry entry : nonVariantLibs) {
+      String pathWithoutVariant = PathUtils.getFilePathWithoutTopLevel(entry.getName());
+      if (!coveredFiles.contains(pathWithoutVariant)) {
+        res.add(Pair.of(entry, Paths.get(DESTINATION_DIR, pathWithoutVariant).toString()));
+      }
+    }
+    return res;
+  }
+}