fs_config: Add fs_config_generate

fs_config_generate_$(TARGET_DEVICE) is built based off the content
of $(TARGET_ANDROID_FILESYSTEM_CONFIG_H). We also add the rules
fs_config_dirs and fs_config_file to utilize this command
for target contents:

fs_config_generate_$(TARGET_DEVICE) -D -o system/etc/fs_config_dir
fs_config_generate_$(TARGET_DEVICE) -F -o system/etc/fs_config_file

In order to use this feature, one must have the fs_config_dirs and
fs_config_files in the $(PRODUCT_PACKAGES) list defined in the
device make files in $(TARGET_DEVICE_DIR). And either an
android_filesystem_config.h file in that directory, or define a
path in TARGET_ANDROID_FILESYSTEM_CONFIG_H to point to one.

Bug: 19908228
Change-Id: Iee1543d99169f874e0915ae07962a7750ecb6342

1 files changed, 44 insertions, 0 deletions

diff --git a/tools/fs_config/default/android_filesystem_config.h b/tools/fs_config/default/android_filesystem_config.h
new file mode 100644
index 0000000..820b04a
--- /dev/null
+++ b/tools/fs_config/default/android_filesystem_config.h
@@ -0,0 +1,44 @@
+/*
+ * Copyright (C) 2015 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.
+ */
+
+/* This file is used to enhance the properties of the filesystem
+** images generated by build tools (mkbootfs and mkyaffs2image) and
+** by the device side of adb.
+*/
+
+/*
+** Resorting to the default file means someone requested fs_config_dirs or
+** fs_config_files in their device configuration without providing an
+** associated header.
+*/
+#warning No device-supplied android_filesystem_config.h, using empty default.
+
+/* Rules for directories.
+** These rules are applied based on "first match", so they
+** should start with the most specific path and work their
+** way up to the root.
+*/
+
+#define NO_ANDROID_FILESYSTEM_CONFIG_DEVICE_DIRS 1 /* opt out of specifying */
+
+/* Rules for files.
+** These rules are applied based on "first match", so they
+** should start with the most specific path and work their
+** way up to the root. Prefixes ending in * denotes wildcard
+** and will allow partial matches.
+*/
+
+#define NO_ANDROID_FILESYSTEM_CONFIG_DEVICE_FILES 1 /* opt out of specifying */