Commit | Line | Data |
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59f0d218 FF |
1 | #!/usr/bin/env python3 |
2 | # buildorder.py - script to generate a build order respecting package dependencies | |
3 | ||
6521bf5c FD |
4 | import os |
5 | import sys | |
59f0d218 | 6 | |
59f0d218 | 7 | |
6521bf5c FD |
8 | def die(msg): |
9 | sys.exit('ERROR: ' + msg) | |
59f0d218 | 10 | |
59f0d218 | 11 | |
6521bf5c FD |
12 | if len(sys.argv) != 1: |
13 | die('buildorder.py takes no arguments') | |
14 | ||
15 | ||
da6299f0 FD |
16 | class TermuxBuildFile(object): |
17 | def __init__(self, path): | |
18 | self.path = path | |
19 | ||
20 | def _get_dependencies(self): | |
21 | pkg_dep_prefix = 'TERMUX_PKG_DEPENDS=' | |
22 | subpkg_dep_prefix = 'TERMUX_SUBPKG_DEPENDS=' | |
23 | ||
24 | with open(self.path) as f: | |
25 | prefix = None | |
26 | for line in f: | |
27 | if line.startswith(pkg_dep_prefix): | |
28 | prefix = pkg_dep_prefix | |
29 | elif line.startswith(subpkg_dep_prefix): | |
30 | prefix = subpkg_dep_prefix | |
31 | else: | |
32 | continue | |
33 | ||
34 | comma_deps = line[len(prefix):].replace('"', '') | |
35 | ||
36 | return set([ | |
37 | dep.strip() for dep in comma_deps.split(',') | |
38 | if 'libandroid-support' not in dep | |
39 | ]) | |
40 | ||
41 | # no deps found | |
42 | return set() | |
43 | ||
44 | ||
37af75e4 | 45 | class TermuxPackage(object): |
da6299f0 FD |
46 | PACKAGES_DIR = 'packages' |
47 | ||
6521bf5c FD |
48 | def __init__(self, name): |
49 | self.name = name | |
da6299f0 FD |
50 | self.dir = os.path.join(self.PACKAGES_DIR, name) |
51 | ||
52 | # search package build.sh | |
53 | build_sh_path = os.path.join(self.dir, 'build.sh') | |
54 | if not os.path.isfile(build_sh_path): | |
55 | raise Exception("build.sh not found") | |
56 | ||
57 | self.buildfile = TermuxBuildFile(build_sh_path) | |
58 | self.deps = self.buildfile._get_dependencies() | |
59 | ||
60 | # search subpackages | |
61 | self.subpkgs = [] | |
62 | ||
63 | for filename in os.listdir(self.dir): | |
64 | if not filename.endswith('.subpackage.sh'): | |
65 | continue | |
66 | ||
67 | subpkg_name = filename.split('.subpackage.sh')[0] | |
68 | subpkg = TermuxSubPackage(subpkg_name, parent=self) | |
69 | ||
70 | self.subpkgs.append(subpkg) | |
71 | self.deps |= subpkg.deps | |
72 | ||
73 | # Do not depend on itself | |
74 | self.deps.discard(self.name) | |
75 | # Do not depend on any sub package | |
76 | self.deps.difference_update([subpkg.name for subpkg in self.subpkgs]) | |
77 | ||
78 | self.needed_by = set() # to be completed outside, reverse of deps | |
79 | ||
80 | def __repr__(self): | |
81 | return "<{} '{}'>".format(self.__class__.__name__, self.name) | |
82 | ||
83 | ||
84 | class TermuxSubPackage(TermuxPackage): | |
85 | ||
86 | def __init__(self, name, parent=None): | |
87 | if parent is None: | |
88 | raise Exception("SubPackages should have a parent") | |
89 | ||
90 | self.name = name | |
91 | self.parent = parent | |
92 | self.buildfile = TermuxBuildFile(os.path.join(self.parent.dir, name + '.subpackage.sh')) | |
93 | self.deps = self.buildfile._get_dependencies() | |
94 | ||
95 | def __repr__(self): | |
96 | return "<{} '{}' parent='{}'>".format(self.__class__.__name__, self.name, self.parent) | |
6521bf5c | 97 | |
da6299f0 FD |
98 | |
99 | # Tracks non-visited deps for each package | |
100 | remaining_deps = {} | |
6521bf5c | 101 | |
37af75e4 | 102 | # Mapping from package name to TermuxPackage |
6521bf5c | 103 | # (if subpackage, mapping from subpackage name to parent package) |
da6299f0 | 104 | pkgs_map = {} |
59f0d218 | 105 | |
da6299f0 FD |
106 | # Reverse dependencies |
107 | pkg_depends_on = {} | |
6521bf5c | 108 | |
da6299f0 | 109 | PACKAGES_DIR = 'packages' |
6521bf5c | 110 | |
15ea0fef | 111 | |
da6299f0 | 112 | def populate(): |
15ea0fef | 113 | |
da6299f0 | 114 | for pkgdir_name in sorted(os.listdir(PACKAGES_DIR)): |
15ea0fef | 115 | |
da6299f0 | 116 | pkg = TermuxPackage(pkgdir_name) |
15ea0fef | 117 | |
da6299f0 FD |
118 | pkgs_map[pkg.name] = pkg |
119 | ||
120 | for subpkg in pkg.subpkgs: | |
121 | pkgs_map[subpkg.name] = pkg | |
122 | remaining_deps[subpkg.name] = set(subpkg.deps) | |
123 | ||
124 | remaining_deps[pkg.name] = set(pkg.deps) | |
15ea0fef | 125 | |
da6299f0 FD |
126 | all_pkg_names = set(pkgs_map.keys()) |
127 | ||
128 | for name, pkg in pkgs_map.items(): | |
129 | for dep_name in remaining_deps[name]: | |
130 | if dep_name not in all_pkg_names: | |
15ea0fef | 131 | die('Package %s depends on non-existing package "%s"' % ( |
da6299f0 | 132 | name, dep_name |
15ea0fef | 133 | )) |
15ea0fef | 134 | |
da6299f0 FD |
135 | dep_pkg = pkgs_map[dep_name] |
136 | dep_pkg.needed_by.add(pkg) | |
137 | ||
138 | ||
139 | def buildorder(): | |
37af75e4 | 140 | # List of all TermuxPackages without dependencies |
da6299f0 FD |
141 | leaf_pkgs = [pkg for name, pkg in pkgs_map.items() if not pkg.deps] |
142 | ||
143 | if not leaf_pkgs: | |
144 | die('No package without dependencies - where to start?') | |
15ea0fef FD |
145 | |
146 | # Sort alphabetically, but with libandroid-support first (since dependency on libandroid-support | |
147 | # does not need to be declared explicitly, so anything might in theory depend on it to build): | |
da6299f0 | 148 | pkg_queue = sorted(leaf_pkgs, key=lambda p: '' if p.name == 'libandroid-support' else p.name) |
15ea0fef FD |
149 | |
150 | # Topological sorting | |
151 | build_order = [] | |
da6299f0 FD |
152 | visited = set() |
153 | ||
154 | while pkg_queue: | |
155 | pkg = pkg_queue.pop(0) | |
156 | if pkg.name in visited: | |
157 | continue | |
158 | visited.add(pkg.name) | |
159 | ||
160 | # print("Processing {}:".format(pkg.name), pkg.needed_by) | |
161 | ||
15ea0fef | 162 | build_order.append(pkg) |
da6299f0 FD |
163 | |
164 | for other_pkg in sorted(pkg.needed_by, key=lambda p: p.name): | |
165 | # Mark this package as done | |
166 | remaining_deps[other_pkg.name].discard(pkg.name) | |
167 | ||
168 | # ... and all its subpackages | |
169 | remaining_deps[other_pkg.name].difference_update( | |
170 | [subpkg.name for subpkg in pkg.subpkgs] | |
171 | ) | |
172 | ||
173 | if not remaining_deps[other_pkg.name]: # all deps were pruned? | |
174 | pkg_queue.append(other_pkg) | |
175 | ||
176 | return build_order | |
177 | ||
178 | ||
179 | def generate_and_print_buildorder(): | |
180 | build_order = buildorder() | |
181 | ||
182 | if set(pkgs_map.values()) != set(build_order): | |
15ea0fef | 183 | print("ERROR: Cycle exists. Remaining: ") |
da6299f0 | 184 | for name, pkg in pkgs_map.items(): |
15ea0fef | 185 | if pkg not in build_order: |
da6299f0 FD |
186 | print(name, remaining_deps[name]) |
187 | ||
15ea0fef FD |
188 | sys.exit(1) |
189 | ||
190 | for pkg in build_order: | |
191 | print(pkg.name) | |
192 | ||
da6299f0 FD |
193 | sys.exit(0) |
194 | ||
15ea0fef | 195 | if __name__ == '__main__': |
da6299f0 FD |
196 | populate() |
197 | generate_and_print_buildorder() |