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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 | |
4f0cc219 FD |
7 | from itertools import filterfalse |
8 | ||
9 | ||
10 | # https://docs.python.org/3/library/itertools.html#itertools-recipes | |
11 | ||
12 | def unique_everseen(iterable, key=None): | |
13 | "List unique elements, preserving order. Remember all elements ever seen." | |
14 | # unique_everseen('AAAABBBCCDAABBB') --> A B C D | |
15 | # unique_everseen('ABBCcAD', str.lower) --> A B C D | |
16 | seen = set() | |
17 | seen_add = seen.add | |
18 | if key is None: | |
19 | for element in filterfalse(seen.__contains__, iterable): | |
20 | seen_add(element) | |
21 | yield element | |
22 | else: | |
23 | for element in iterable: | |
24 | k = key(element) | |
25 | if k not in seen: | |
26 | seen_add(k) | |
27 | yield element | |
28 | ||
59f0d218 | 29 | |
6521bf5c FD |
30 | def die(msg): |
31 | sys.exit('ERROR: ' + msg) | |
59f0d218 | 32 | |
59f0d218 | 33 | |
da6299f0 FD |
34 | class TermuxBuildFile(object): |
35 | def __init__(self, path): | |
36 | self.path = path | |
37 | ||
38 | def _get_dependencies(self): | |
39 | pkg_dep_prefix = 'TERMUX_PKG_DEPENDS=' | |
40 | subpkg_dep_prefix = 'TERMUX_SUBPKG_DEPENDS=' | |
41 | ||
42 | with open(self.path) as f: | |
43 | prefix = None | |
44 | for line in f: | |
45 | if line.startswith(pkg_dep_prefix): | |
46 | prefix = pkg_dep_prefix | |
47 | elif line.startswith(subpkg_dep_prefix): | |
48 | prefix = subpkg_dep_prefix | |
49 | else: | |
50 | continue | |
51 | ||
52 | comma_deps = line[len(prefix):].replace('"', '') | |
53 | ||
54 | return set([ | |
55 | dep.strip() for dep in comma_deps.split(',') | |
56 | if 'libandroid-support' not in dep | |
57 | ]) | |
58 | ||
59 | # no deps found | |
60 | return set() | |
61 | ||
62 | ||
37af75e4 | 63 | class TermuxPackage(object): |
da6299f0 FD |
64 | PACKAGES_DIR = 'packages' |
65 | ||
6521bf5c FD |
66 | def __init__(self, name): |
67 | self.name = name | |
da6299f0 FD |
68 | self.dir = os.path.join(self.PACKAGES_DIR, name) |
69 | ||
70 | # search package build.sh | |
71 | build_sh_path = os.path.join(self.dir, 'build.sh') | |
72 | if not os.path.isfile(build_sh_path): | |
73 | raise Exception("build.sh not found") | |
74 | ||
75 | self.buildfile = TermuxBuildFile(build_sh_path) | |
76 | self.deps = self.buildfile._get_dependencies() | |
77 | ||
78 | # search subpackages | |
79 | self.subpkgs = [] | |
80 | ||
81 | for filename in os.listdir(self.dir): | |
82 | if not filename.endswith('.subpackage.sh'): | |
83 | continue | |
84 | ||
85 | subpkg_name = filename.split('.subpackage.sh')[0] | |
86 | subpkg = TermuxSubPackage(subpkg_name, parent=self) | |
87 | ||
88 | self.subpkgs.append(subpkg) | |
89 | self.deps |= subpkg.deps | |
90 | ||
91 | # Do not depend on itself | |
92 | self.deps.discard(self.name) | |
93 | # Do not depend on any sub package | |
94 | self.deps.difference_update([subpkg.name for subpkg in self.subpkgs]) | |
95 | ||
96 | self.needed_by = set() # to be completed outside, reverse of deps | |
97 | ||
98 | def __repr__(self): | |
99 | return "<{} '{}'>".format(self.__class__.__name__, self.name) | |
100 | ||
101 | ||
102 | class TermuxSubPackage(TermuxPackage): | |
103 | ||
104 | def __init__(self, name, parent=None): | |
105 | if parent is None: | |
106 | raise Exception("SubPackages should have a parent") | |
107 | ||
108 | self.name = name | |
109 | self.parent = parent | |
110 | self.buildfile = TermuxBuildFile(os.path.join(self.parent.dir, name + '.subpackage.sh')) | |
111 | self.deps = self.buildfile._get_dependencies() | |
112 | ||
113 | def __repr__(self): | |
114 | return "<{} '{}' parent='{}'>".format(self.__class__.__name__, self.name, self.parent) | |
6521bf5c | 115 | |
da6299f0 FD |
116 | |
117 | # Tracks non-visited deps for each package | |
118 | remaining_deps = {} | |
6521bf5c | 119 | |
37af75e4 | 120 | # Mapping from package name to TermuxPackage |
6521bf5c | 121 | # (if subpackage, mapping from subpackage name to parent package) |
da6299f0 | 122 | pkgs_map = {} |
59f0d218 | 123 | |
da6299f0 FD |
124 | # Reverse dependencies |
125 | pkg_depends_on = {} | |
6521bf5c | 126 | |
da6299f0 | 127 | PACKAGES_DIR = 'packages' |
6521bf5c | 128 | |
15ea0fef | 129 | |
da6299f0 | 130 | def populate(): |
15ea0fef | 131 | |
da6299f0 | 132 | for pkgdir_name in sorted(os.listdir(PACKAGES_DIR)): |
15ea0fef | 133 | |
da6299f0 | 134 | pkg = TermuxPackage(pkgdir_name) |
15ea0fef | 135 | |
da6299f0 FD |
136 | pkgs_map[pkg.name] = pkg |
137 | ||
138 | for subpkg in pkg.subpkgs: | |
139 | pkgs_map[subpkg.name] = pkg | |
140 | remaining_deps[subpkg.name] = set(subpkg.deps) | |
141 | ||
142 | remaining_deps[pkg.name] = set(pkg.deps) | |
15ea0fef | 143 | |
da6299f0 FD |
144 | all_pkg_names = set(pkgs_map.keys()) |
145 | ||
146 | for name, pkg in pkgs_map.items(): | |
147 | for dep_name in remaining_deps[name]: | |
148 | if dep_name not in all_pkg_names: | |
15ea0fef | 149 | die('Package %s depends on non-existing package "%s"' % ( |
da6299f0 | 150 | name, dep_name |
15ea0fef | 151 | )) |
15ea0fef | 152 | |
da6299f0 FD |
153 | dep_pkg = pkgs_map[dep_name] |
154 | dep_pkg.needed_by.add(pkg) | |
155 | ||
156 | ||
4f0cc219 FD |
157 | def generate_full_buildorder(): |
158 | build_order = [] | |
159 | ||
37af75e4 | 160 | # List of all TermuxPackages without dependencies |
da6299f0 FD |
161 | leaf_pkgs = [pkg for name, pkg in pkgs_map.items() if not pkg.deps] |
162 | ||
163 | if not leaf_pkgs: | |
164 | die('No package without dependencies - where to start?') | |
15ea0fef FD |
165 | |
166 | # Sort alphabetically, but with libandroid-support first (since dependency on libandroid-support | |
167 | # does not need to be declared explicitly, so anything might in theory depend on it to build): | |
da6299f0 | 168 | pkg_queue = sorted(leaf_pkgs, key=lambda p: '' if p.name == 'libandroid-support' else p.name) |
15ea0fef FD |
169 | |
170 | # Topological sorting | |
da6299f0 FD |
171 | visited = set() |
172 | ||
173 | while pkg_queue: | |
174 | pkg = pkg_queue.pop(0) | |
175 | if pkg.name in visited: | |
176 | continue | |
da6299f0 FD |
177 | |
178 | # print("Processing {}:".format(pkg.name), pkg.needed_by) | |
0227e1a6 | 179 | visited.add(pkg.name) |
15ea0fef | 180 | build_order.append(pkg) |
da6299f0 FD |
181 | |
182 | for other_pkg in sorted(pkg.needed_by, key=lambda p: p.name): | |
0227e1a6 | 183 | # Remove this pkg from deps |
da6299f0 | 184 | remaining_deps[other_pkg.name].discard(pkg.name) |
da6299f0 FD |
185 | # ... and all its subpackages |
186 | remaining_deps[other_pkg.name].difference_update( | |
187 | [subpkg.name for subpkg in pkg.subpkgs] | |
188 | ) | |
189 | ||
0227e1a6 FD |
190 | if not remaining_deps[other_pkg.name]: # all deps were already appended? |
191 | pkg_queue.append(other_pkg) # should be processed | |
da6299f0 | 192 | |
da6299f0 | 193 | if set(pkgs_map.values()) != set(build_order): |
15ea0fef | 194 | print("ERROR: Cycle exists. Remaining: ") |
da6299f0 | 195 | for name, pkg in pkgs_map.items(): |
15ea0fef | 196 | if pkg not in build_order: |
da6299f0 FD |
197 | print(name, remaining_deps[name]) |
198 | ||
15ea0fef FD |
199 | sys.exit(1) |
200 | ||
4f0cc219 | 201 | return build_order |
15ea0fef | 202 | |
da6299f0 | 203 | |
4f0cc219 FD |
204 | def deps_then_me(pkg): |
205 | l = [] | |
a8d10018 | 206 | |
a8d10018 | 207 | for dep in sorted(pkg.deps): |
4f0cc219 FD |
208 | l += deps_then_me(pkgs_map[dep]) |
209 | l += [pkg] | |
210 | ||
211 | return l | |
212 | ||
213 | ||
214 | def generate_targets_buildorder(targetnames): | |
215 | buildorder = [] | |
216 | ||
217 | for pkgname in targetnames: | |
218 | buildorder += deps_then_me(pkgs_map[pkgname]) | |
219 | ||
220 | return unique_everseen(buildorder) | |
a8d10018 | 221 | |
15ea0fef | 222 | if __name__ == '__main__': |
da6299f0 | 223 | populate() |
a8d10018 FD |
224 | |
225 | if len(sys.argv) == 1: | |
4f0cc219 FD |
226 | bo = generate_full_buildorder() |
227 | else: | |
228 | bo = generate_targets_buildorder(sys.argv[1:]) | |
a8d10018 | 229 | |
4f0cc219 FD |
230 | for pkg in bo: |
231 | print(pkg.name) |