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59f0d218 FF |
1 | #!/usr/bin/env python3 |
2 | # buildorder.py - script to generate a build order respecting package dependencies | |
3 | ||
4 | import os, sys | |
5 | ||
6 | def die(msg): | |
7 | print('ERROR: ' + msg) | |
8 | sys.exit(1) | |
9 | ||
10 | if len(sys.argv) != 2: die("Supply path to packages directory as first and only argument") | |
11 | packages_dir = sys.argv[1] | |
12 | if not os.path.isdir(packages_dir): die(packages_dir + ' is not a directory') | |
13 | ||
14 | class DebianPackage: | |
15 | def __init__(self, name): | |
16 | self.name = name | |
17 | self.remaining_dependencies = set() # String | |
18 | self.sub_packages = set() # String | |
19 | self.prerequisite_for = set() # Packages that needs this package | |
20 | ||
21 | all_packages = [] # List of all DebianPackage:s | |
22 | packages_map = {} # Mapping from package name to DebianPackage (if subpackage, mapping from subpackage name to parent package) | |
23 | ||
24 | for subdir_name in sorted(os.listdir(packages_dir)): | |
25 | subdir_path = packages_dir + '/' + subdir_name | |
26 | if os.path.exists(subdir_path + '/BROKEN.txt'): continue | |
27 | build_sh_path = subdir_path + '/build.sh' | |
28 | ||
29 | this_package = DebianPackage(subdir_name) | |
30 | all_packages.append(this_package) | |
31 | packages_map[this_package.name] = this_package | |
32 | ||
33 | if not os.path.isfile(build_sh_path): die('The directory ' + subdir_name + ' does not contain build.sh') | |
34 | with open(build_sh_path) as build_sh_file: | |
35 | for line in build_sh_file: | |
36 | if line.startswith('TERMUX_PKG_DEPENDS='): | |
37 | deps_comma_separated = line[(line.index('=')+2):(len(line)-2)] | |
38 | for dep in deps_comma_separated.split(','): | |
39 | dep = dep.strip() | |
40 | this_package.remaining_dependencies.add(dep) | |
41 | for file_in_subdir_name in sorted(os.listdir(subdir_path)): | |
42 | if file_in_subdir_name.endswith('.subpackage.sh'): | |
43 | subpackage_name = file_in_subdir_name[0:-len(".subpackage.sh"):] | |
44 | this_package.sub_packages.add(subpackage_name) | |
45 | packages_map[subpackage_name] = this_package | |
46 | with open(subdir_path + '/' + file_in_subdir_name) as subpackage_sh_file: | |
47 | for line in subpackage_sh_file: | |
48 | if line.startswith('TERMUX_SUBPKG_DEPENDS='): | |
49 | deps_comma_separated = line[(line.index('=')+2):(len(line)-2)] | |
50 | for dep in deps_comma_separated.split(','): | |
51 | dep = dep.strip() | |
52 | this_package.remaining_dependencies.add(dep) | |
53 | this_package.remaining_dependencies.discard(this_package.name) # Do not depend on itself | |
54 | this_package.remaining_dependencies.difference_update(this_package.sub_packages) # Do not depend on any sub package | |
55 | ||
56 | for package in all_packages: | |
57 | for remaining in package.remaining_dependencies: | |
58 | if not remaining in packages_map: die('Package ' + package.name + ' depends on non-existing package "' + remaining + '"') | |
59 | packages_map[remaining].prerequisite_for.add(package) | |
60 | ||
61 | # List of all DebianPackage:s without dependencies | |
62 | packages_without_deps = [p for p in all_packages if not p.remaining_dependencies] | |
63 | if not packages_without_deps: die('No package without dependency - where to start?') | |
64 | ||
65 | # Sort alphabetically, but with libandroid-support first (since dependency on libandroid-support | |
66 | # does not need to be declared explicitly, so anything might in theory depend on it to build): | |
67 | packages_without_deps.sort(key=lambda p: 'aaaa' if p.name == 'libandroid-support' else p.name, reverse=True) | |
68 | ||
69 | # Topological sorting | |
70 | build_order = [] | |
71 | while packages_without_deps: | |
72 | pkg = packages_without_deps.pop() | |
73 | build_order.append(pkg) | |
74 | for other_package in pkg.prerequisite_for: | |
75 | other_package.remaining_dependencies.discard(pkg.name) # Remove this package | |
76 | other_package.remaining_dependencies.difference_update(pkg.sub_packages) # .. and all its subpackages | |
77 | if not other_package.remaining_dependencies: | |
78 | # Check if the other package is ready to build now | |
79 | packages_without_deps.append(other_package) | |
80 | ||
81 | if len(all_packages) != len(build_order): | |
82 | print("ERROR: Cycle exists. Remaining: "); | |
83 | for pkg in all_packages: | |
84 | if pkg not in build_order: print(pkg.name) | |
85 | sys.exit(1) | |
86 | ||
87 | for pkg in build_order: print(pkg.name) | |
88 |