Identify modules ready to be converted to Soong
The output will be in the `m dist` results as soong_to_convert.txt, or
can be built using:
$ m $OUT/soong_to_convert.txt
The output is a list of modules that are probably ready to convert to
Soong:
# Blocked on Module (potential problems)
283 libEGL (srcs_dotarm)
246 libicuuc (dotdot_incs dotdot_srcs)
221 libspeexresampler
215 libcamera_metadata
...
0 zram-perf (dotdot_incs)
The number at the beginning of the line shows how many native modules
depend on that module.
All of their dependencies have been satisfied, and any potential
problems that Make can detect are listed in parenthesis after the
module:
dotdot_srcs: LOCAL_SRC_FILES contains paths outside $(LOCAL_PATH)
dotdot_incs: LOCAL_C_INCLUDES contains paths include '..'
srcs_dotarm: LOCAL_SRC_FILES contains source files like <...>.c.arm
aidl: LOCAL_SRC_FILES contains .aidl sources
dbus: LOCAL_SRC_FILES contains .dbus-xml sources
objc: LOCAL_SRC_FILES contains Objective-C sources
proto: LOCAL_SRC_FILES contains .proto sources
rs: LOCAL_SRC_FILES contains renderscript sources
vts: LOCAL_SRC_FILES contains .vts sources
Not all problems can be discovered, but this is a starting point.
Change-Id: I45674fe93fd267d4d1fb0bc3bc9aa025e20c5ac6
diff --git a/tools/soong_to_convert.py b/tools/soong_to_convert.py
new file mode 100755
index 0000000..379a1ad
--- /dev/null
+++ b/tools/soong_to_convert.py
@@ -0,0 +1,122 @@
+#!/usr/bin/env python
+#
+# Copyright (C) 2016 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.
+
+"""Tool to prioritize which modules to convert to Soong.
+
+Generally, you'd use this through the make integration, which automatically
+generates the CSV input file that this tool expects:
+
+ $ m $OUT/soong_to_convert.txt
+ $ less $OUT/soong_to_convert.txt
+
+The output is a list of modules that are probably ready to convert to Soong:
+
+ # Blocked on Module (potential problems)
+ 283 libEGL (srcs_dotarm)
+ 246 libicuuc (dotdot_incs dotdot_srcs)
+ 221 libspeexresampler
+ 215 libcamera_metadata
+ ...
+ 0 zram-perf (dotdot_incs)
+
+The number at the beginning of the line shows how many native modules depend
+on that module.
+
+All of their dependencies have been satisfied, and any potential problems
+that Make can detect are listed in parenthesis after the module:
+
+ dotdot_srcs: LOCAL_SRC_FILES contains paths outside $(LOCAL_PATH)
+ dotdot_incs: LOCAL_C_INCLUDES contains paths include '..'
+ srcs_dotarm: LOCAL_SRC_FILES contains source files like <...>.c.arm
+ aidl: LOCAL_SRC_FILES contains .aidl sources
+ dbus: LOCAL_SRC_FILES contains .dbus-xml sources
+ objc: LOCAL_SRC_FILES contains Objective-C sources
+ proto: LOCAL_SRC_FILES contains .proto sources
+ rs: LOCAL_SRC_FILES contains renderscript sources
+ vts: LOCAL_SRC_FILES contains .vts sources
+
+Not all problems can be discovered, but this is a starting point.
+
+"""
+
+from __future__ import print_function
+
+import csv
+import sys
+
+def count_deps(depsdb, module, seen):
+ """Based on the depsdb, count the number of transitive dependencies.
+
+ You can pass in an reversed dependency graph to conut the number of
+ modules that depend on the module."""
+ count = 0
+ seen.append(module)
+ if module in depsdb:
+ for dep in depsdb[module]:
+ if dep in seen:
+ continue
+ count += 1 + count_deps(depsdb, dep, seen)
+ return count
+
+def process(reader):
+ """Read the input file and produce a list of modules ready to move to Soong
+ """
+ problems = dict()
+ deps = dict()
+ reverse_deps = dict()
+
+ for (module, problem, dependencies) in reader:
+ problems[module] = problem
+ deps[module] = [d for d in dependencies.strip().split(' ') if d != ""]
+ for dep in deps[module]:
+ if not dep in reverse_deps:
+ reverse_deps[dep] = []
+ reverse_deps[dep].append(module)
+
+ results = []
+ for module in problems:
+ # Only display actionable conversions, ones without missing dependencies
+ if len(deps[module]) != 0:
+ continue
+
+ extra = ""
+ if len(problems[module]) > 0:
+ extra = " ({})".format(problems[module])
+ results.append((count_deps(reverse_deps, module, []), module + extra))
+
+ return sorted(results, key=lambda result: (-result[0], result[1]))
+
+def display(results):
+ """Displays the results"""
+ count_header = "# Blocked on"
+ count_width = len(count_header)
+ print("{} Module (potential problems)".format(count_header))
+ for (count, module) in results:
+ print("{:>{}} {}".format(count, count_width, module))
+
+def main(filename):
+ """Read the CSV file, print the results"""
+ with open(filename, 'rb') as csvfile:
+ results = process(csv.reader(csvfile))
+
+ display(results)
+
+if __name__ == "__main__":
+ if len(sys.argv) != 2:
+ print("usage: soong_conversion.py <file>", file=sys.stderr)
+ sys.exit(1)
+
+ main(sys.argv[1])