Unify the user image building code
Bug: 5398808
Before this change we have duplicate code in the Makefile and the
python-based releasetool. That's a real headache to maintain.
Change-Id: I8ddf04a79c6886540e89d990f723d8f77c9dd883
diff --git a/tools/releasetools/build_image.py b/tools/releasetools/build_image.py
new file mode 100755
index 0000000..b5140a9
--- /dev/null
+++ b/tools/releasetools/build_image.py
@@ -0,0 +1,128 @@
+#!/usr/bin/env python
+#
+# Copyright (C) 2011 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.
+
+"""
+Build image output_image_file from input_directory and properties_file.
+
+Usage: build_image input_directory properties_file output_image_file
+
+"""
+import os
+import subprocess
+import sys
+
+
+def BuildImage(in_dir, prop_dict, out_file):
+ """Build an image to out_file from in_dir with property prop_dict.
+
+ Args:
+ in_dir: path of input directory.
+ prop_dict: property dictionary.
+ out_file: path of the output image file.
+
+ Returns:
+ True iff the image is built successfully.
+ """
+ build_command = []
+ fs_type = prop_dict.get("fs_type", "")
+ if fs_type.startswith("ext"):
+ build_command = ["mkuserimg.sh"]
+ if "extfs_sparse_flag" in prop_dict:
+ build_command.append(prop_dict["extfs_sparse_flag"])
+ build_command.extend([in_dir, out_file, fs_type,
+ prop_dict["mount_point"]])
+ if "partition_size" in prop_dict:
+ build_command.append(prop_dict["partition_size"])
+ else:
+ build_command = ["mkyaffs2image", "-f"]
+ if prop_dict.get("mkyaffs2_extra_flags", None):
+ build_command.extend(prop_dict["mkyaffs2_extra_flags"].split())
+ build_command.append(in_dir)
+ build_command.append(out_file)
+
+ print "Running: ", " ".join(build_command)
+ p = subprocess.Popen(build_command);
+ p.communicate()
+ return p.returncode == 0
+
+
+def ImagePropFromGlobalDict(glob_dict, mount_point):
+ """Build an image property dictionary from the global dictionary.
+
+ Args:
+ glob_dict: the global dictionary from the build system.
+ mount_point: such as "system", "data" etc.
+ """
+ d = {}
+ common_props = (
+ "fs_type",
+ "extfs_sparse_flag",
+ "mkyaffs2_extra_flags",
+ )
+ for p in common_props:
+ if p in glob_dict:
+ d[p] = glob_dict[p]
+
+ d["mount_point"] = mount_point
+ if mount_point == "system":
+ if "system_size" in glob_dict:
+ d["partition_size"] = str(glob_dict["system_size"])
+ elif mount_point == "data":
+ if "userdata_size" in glob_dict:
+ d["partition_size"] = str(glob_dict["userdata_size"])
+
+ return d
+
+
+def LoadGlobalDict(filename):
+ """Load "name=value" pairs from filename"""
+ d = {}
+ f = open(filename)
+ for line in f:
+ line = line.strip()
+ if not line or line.startswith("#"):
+ continue
+ k, v = line.split("=", 1)
+ d[k] = v
+ f.close()
+ return d
+
+
+def main(argv):
+ if len(argv) != 3:
+ print __doc__
+ sys.exit(1)
+
+ in_dir = argv[0]
+ glob_dict_file = argv[1]
+ out_file = argv[2]
+
+ glob_dict = LoadGlobalDict(glob_dict_file)
+ image_filename = os.path.basename(out_file)
+ mount_point = ""
+ if image_filename == "system.img":
+ mount_point = "system"
+ elif image_filename == "userdata.img":
+ mount_point = "data"
+
+ image_properties = ImagePropFromGlobalDict(glob_dict, mount_point)
+ if not BuildImage(in_dir, image_properties, out_file):
+ print >> sys.stderr, "error: failed to build %s from %s" % (out_file, in_dir)
+ exit(1)
+
+
+if __name__ == '__main__':
+ main(sys.argv[1:])