1 #!/usr/bin/env python 2 # 3 # Copyright (C) 2016 The Android Open Source Project 4 # 5 # Licensed under the Apache License, Version 2.0 (the "License"); 6 # you may not use this file except in compliance with the License. 7 # You may obtain a copy of the License at 8 # 9 # http://www.apache.org/licenses/LICENSE-2.0 10 # 11 # Unless required by applicable law or agreed to in writing, software 12 # distributed under the License is distributed on an "AS IS" BASIS, 13 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 14 # See the License for the specific language governing permissions and 15 # limitations under the License. 16 17 """Tool to prioritize which modules to convert to Soong. 18 19 Generally, you'd use this through the make integration, which automatically 20 generates the CSV input file that this tool expects: 21 22 $ m $OUT/soong_to_convert.txt 23 $ less $OUT/soong_to_convert.txt 24 25 The output is a list of modules that are probably ready to convert to Soong: 26 27 # Blocked on Module (potential problems) 28 283 libEGL (srcs_dotarm) 29 246 libicuuc (dotdot_incs dotdot_srcs) 30 221 libspeexresampler 31 215 libcamera_metadata 32 ... 33 0 zram-perf (dotdot_incs) 34 35 The number at the beginning of the line shows how many native modules depend 36 on that module. 37 38 All of their dependencies have been satisfied, and any potential problems 39 that Make can detect are listed in parenthesis after the module: 40 41 dotdot_srcs: LOCAL_SRC_FILES contains paths outside $(LOCAL_PATH) 42 dotdot_incs: LOCAL_C_INCLUDES contains paths include '..' 43 srcs_dotarm: LOCAL_SRC_FILES contains source files like <...>.c.arm 44 aidl: LOCAL_SRC_FILES contains .aidl sources 45 objc: LOCAL_SRC_FILES contains Objective-C sources 46 proto: LOCAL_SRC_FILES contains .proto sources 47 rs: LOCAL_SRC_FILES contains renderscript sources 48 vts: LOCAL_SRC_FILES contains .vts sources 49 50 Not all problems can be discovered, but this is a starting point. 51 52 """ 53 54 from __future__ import print_function 55 56 import csv 57 import sys 58 59 def count_deps(depsdb, module, seen): 60 """Based on the depsdb, count the number of transitive dependencies. 61 62 You can pass in an reversed dependency graph to conut the number of 63 modules that depend on the module.""" 64 count = 0 65 seen.append(module) 66 if module in depsdb: 67 for dep in depsdb[module]: 68 if dep in seen: 69 continue 70 count += 1 + count_deps(depsdb, dep, seen) 71 return count 72 73 def process(reader): 74 """Read the input file and produce a list of modules ready to move to Soong 75 """ 76 problems = dict() 77 deps = dict() 78 reverse_deps = dict() 79 80 for (module, problem, dependencies) in reader: 81 problems[module] = problem 82 deps[module] = [d for d in dependencies.strip().split(' ') if d != ""] 83 for dep in deps[module]: 84 if not dep in reverse_deps: 85 reverse_deps[dep] = [] 86 reverse_deps[dep].append(module) 87 88 results = [] 89 for module in problems: 90 # Only display actionable conversions, ones without missing dependencies 91 if len(deps[module]) != 0: 92 continue 93 94 extra = "" 95 if len(problems[module]) > 0: 96 extra = " ({})".format(problems[module]) 97 results.append((count_deps(reverse_deps, module, []), module + extra)) 98 99 return sorted(results, key=lambda result: (-result[0], result[1])) 100 101 def display(results): 102 """Displays the results""" 103 count_header = "# Blocked on" 104 count_width = len(count_header) 105 print("{} Module (potential problems)".format(count_header)) 106 for (count, module) in results: 107 print("{:>{}} {}".format(count, count_width, module)) 108 109 def main(filename): 110 """Read the CSV file, print the results""" 111 with open(filename, 'rb') as csvfile: 112 results = process(csv.reader(csvfile)) 113 114 display(results) 115 116 if __name__ == "__main__": 117 if len(sys.argv) != 2: 118 print("usage: soong_conversion.py <file>", file=sys.stderr) 119 sys.exit(1) 120 121 main(sys.argv[1]) 122
