diff --git a/buildorder.py b/buildorder.py index 1cd6f3d4b..fa02f7a9e 100755 --- a/buildorder.py +++ b/buildorder.py @@ -1,85 +1,231 @@ #!/usr/bin/env python3 # buildorder.py - script to generate a build order respecting package dependencies -import os, sys +import os +import sys -def die(msg): sys.exit('ERROR: ' + msg) +from itertools import filterfalse -if len(sys.argv) != 1: die('buildorder.py takes no arguments') -class DebianPackage: - def __init__(self, name): - self.name = name - self.remaining_dependencies = set() # String - self.sub_packages = set() # String - self.prerequisite_for = set() # Packages that needs this package +# https://docs.python.org/3/library/itertools.html#itertools-recipes -all_packages = [] # List of all DebianPackage:s -packages_map = {} # Mapping from package name to DebianPackage (if subpackage, mapping from subpackage name to parent package) +def unique_everseen(iterable, key=None): + "List unique elements, preserving order. Remember all elements ever seen." + # unique_everseen('AAAABBBCCDAABBB') --> A B C D + # unique_everseen('ABBCcAD', str.lower) --> A B C D + seen = set() + seen_add = seen.add + if key is None: + for element in filterfalse(seen.__contains__, iterable): + seen_add(element) + yield element + else: + for element in iterable: + k = key(element) + if k not in seen: + seen_add(k) + yield element -packages_dir = 'packages' -for subdir_name in sorted(os.listdir(packages_dir)): - subdir_path = packages_dir + '/' + subdir_name - if os.path.exists(subdir_path + '/BROKEN.txt'): continue - build_sh_path = subdir_path + '/build.sh' - this_package = DebianPackage(subdir_name) - all_packages.append(this_package) - packages_map[this_package.name] = this_package +def die(msg): + sys.exit('ERROR: ' + msg) - if not os.path.isfile(build_sh_path): die('The directory ' + subdir_name + ' does not contain build.sh') - with open(build_sh_path) as build_sh_file: - for line in build_sh_file: - if line.startswith('TERMUX_PKG_DEPENDS='): - deps_comma_separated = line[(line.index('=')+2):(len(line)-2)] - for dep in deps_comma_separated.split(','): - dep = dep.strip() - if not dep.endswith('libandroid-support-dev'): this_package.remaining_dependencies.add(dep) - for file_in_subdir_name in sorted(os.listdir(subdir_path)): - if file_in_subdir_name.endswith('.subpackage.sh'): - subpackage_name = file_in_subdir_name[0:-len(".subpackage.sh"):] - this_package.sub_packages.add(subpackage_name) - packages_map[subpackage_name] = this_package - with open(subdir_path + '/' + file_in_subdir_name) as subpackage_sh_file: - for line in subpackage_sh_file: - if line.startswith('TERMUX_SUBPKG_DEPENDS='): - deps_comma_separated = line[(line.index('=')+2):(len(line)-2)] - for dep in deps_comma_separated.split(','): - dep = dep.strip() - this_package.remaining_dependencies.add(dep) - this_package.remaining_dependencies.discard(this_package.name) # Do not depend on itself - this_package.remaining_dependencies.difference_update(this_package.sub_packages) # Do not depend on any sub package -for package in all_packages: - for remaining in package.remaining_dependencies: - if not remaining in packages_map: die('Package ' + package.name + ' depends on non-existing package "' + remaining + '"') - packages_map[remaining].prerequisite_for.add(package) +class TermuxBuildFile(object): + def __init__(self, path): + self.path = path -# List of all DebianPackage:s without dependencies -packages_without_deps = [p for p in all_packages if not p.remaining_dependencies] -if not packages_without_deps: die('No package without dependency - where to start?') + def _get_dependencies(self): + pkg_dep_prefix = 'TERMUX_PKG_DEPENDS=' + subpkg_dep_prefix = 'TERMUX_SUBPKG_DEPENDS=' -# Sort alphabetically, but with libandroid-support first (since dependency on libandroid-support -# does not need to be declared explicitly, so anything might in theory depend on it to build): -packages_without_deps.sort(key=lambda p: 'aaaa' if p.name == 'libandroid-support' else p.name, reverse=True) + with open(self.path) as f: + prefix = None + for line in f: + if line.startswith(pkg_dep_prefix): + prefix = pkg_dep_prefix + elif line.startswith(subpkg_dep_prefix): + prefix = subpkg_dep_prefix + else: + continue -# Topological sorting -build_order = [] -while packages_without_deps: - pkg = packages_without_deps.pop() - build_order.append(pkg) - for other_package in pkg.prerequisite_for: - other_package.remaining_dependencies.discard(pkg.name) # Remove this package - other_package.remaining_dependencies.difference_update(pkg.sub_packages) # .. and all its subpackages - if not other_package.remaining_dependencies: - # Check if the other package is ready to build now - packages_without_deps.append(other_package) + comma_deps = line[len(prefix):].replace('"', '') -if len(all_packages) != len(build_order): - print("ERROR: Cycle exists. Remaining: "); - for pkg in all_packages: - if pkg not in build_order: print(pkg.name) - sys.exit(1) + return set([ + dep.strip() for dep in comma_deps.split(',') + if 'libandroid-support' not in dep + ]) -for pkg in build_order: print(pkg.name) + # no deps found + return set() + +class TermuxPackage(object): + PACKAGES_DIR = 'packages' + + def __init__(self, name): + self.name = name + self.dir = os.path.join(self.PACKAGES_DIR, name) + + # search package build.sh + build_sh_path = os.path.join(self.dir, 'build.sh') + if not os.path.isfile(build_sh_path): + raise Exception("build.sh not found") + + self.buildfile = TermuxBuildFile(build_sh_path) + self.deps = self.buildfile._get_dependencies() + + # search subpackages + self.subpkgs = [] + + for filename in os.listdir(self.dir): + if not filename.endswith('.subpackage.sh'): + continue + + subpkg_name = filename.split('.subpackage.sh')[0] + subpkg = TermuxSubPackage(subpkg_name, parent=self) + + self.subpkgs.append(subpkg) + self.deps |= subpkg.deps + + # Do not depend on itself + self.deps.discard(self.name) + # Do not depend on any sub package + self.deps.difference_update([subpkg.name for subpkg in self.subpkgs]) + + self.needed_by = set() # to be completed outside, reverse of deps + + def __repr__(self): + return "<{} '{}'>".format(self.__class__.__name__, self.name) + + +class TermuxSubPackage(TermuxPackage): + + def __init__(self, name, parent=None): + if parent is None: + raise Exception("SubPackages should have a parent") + + self.name = name + self.parent = parent + self.buildfile = TermuxBuildFile(os.path.join(self.parent.dir, name + '.subpackage.sh')) + self.deps = self.buildfile._get_dependencies() + + def __repr__(self): + return "<{} '{}' parent='{}'>".format(self.__class__.__name__, self.name, self.parent) + + +# Tracks non-visited deps for each package +remaining_deps = {} + +# Mapping from package name to TermuxPackage +# (if subpackage, mapping from subpackage name to parent package) +pkgs_map = {} + +# Reverse dependencies +pkg_depends_on = {} + +PACKAGES_DIR = 'packages' + + +def populate(): + + for pkgdir_name in sorted(os.listdir(PACKAGES_DIR)): + + pkg = TermuxPackage(pkgdir_name) + + pkgs_map[pkg.name] = pkg + + for subpkg in pkg.subpkgs: + pkgs_map[subpkg.name] = pkg + remaining_deps[subpkg.name] = set(subpkg.deps) + + remaining_deps[pkg.name] = set(pkg.deps) + + all_pkg_names = set(pkgs_map.keys()) + + for name, pkg in pkgs_map.items(): + for dep_name in remaining_deps[name]: + if dep_name not in all_pkg_names: + die('Package %s depends on non-existing package "%s"' % ( + name, dep_name + )) + + dep_pkg = pkgs_map[dep_name] + dep_pkg.needed_by.add(pkg) + + +def generate_full_buildorder(): + build_order = [] + + # List of all TermuxPackages without dependencies + leaf_pkgs = [pkg for name, pkg in pkgs_map.items() if not pkg.deps] + + if not leaf_pkgs: + die('No package without dependencies - where to start?') + + # Sort alphabetically, but with libandroid-support first (since dependency on libandroid-support + # does not need to be declared explicitly, so anything might in theory depend on it to build): + pkg_queue = sorted(leaf_pkgs, key=lambda p: '' if p.name == 'libandroid-support' else p.name) + + # Topological sorting + visited = set() + + while pkg_queue: + pkg = pkg_queue.pop(0) + if pkg.name in visited: + continue + + # print("Processing {}:".format(pkg.name), pkg.needed_by) + visited.add(pkg.name) + build_order.append(pkg) + + for other_pkg in sorted(pkg.needed_by, key=lambda p: p.name): + # Remove this pkg from deps + remaining_deps[other_pkg.name].discard(pkg.name) + # ... and all its subpackages + remaining_deps[other_pkg.name].difference_update( + [subpkg.name for subpkg in pkg.subpkgs] + ) + + if not remaining_deps[other_pkg.name]: # all deps were already appended? + pkg_queue.append(other_pkg) # should be processed + + if set(pkgs_map.values()) != set(build_order): + print("ERROR: Cycle exists. Remaining: ") + for name, pkg in pkgs_map.items(): + if pkg not in build_order: + print(name, remaining_deps[name]) + + sys.exit(1) + + return build_order + + +def deps_then_me(pkg): + l = [] + + for dep in sorted(pkg.deps): + l += deps_then_me(pkgs_map[dep]) + l += [pkg] + + return l + + +def generate_targets_buildorder(targetnames): + buildorder = [] + + for pkgname in targetnames: + buildorder += deps_then_me(pkgs_map[pkgname]) + + return unique_everseen(buildorder) + +if __name__ == '__main__': + populate() + + if len(sys.argv) == 1: + bo = generate_full_buildorder() + else: + bo = generate_targets_buildorder(sys.argv[1:]) + + for pkg in bo: + print(pkg.name)