88 lines
3.7 KiB
Python
Executable File
88 lines
3.7 KiB
Python
Executable File
#!/usr/bin/env python3
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# buildorder.py - script to generate a build order respecting package dependencies
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import os, sys
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def die(msg):
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print('ERROR: ' + msg)
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sys.exit(1)
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if len(sys.argv) != 1: die('buildorder.py takes no arguments')
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packages_dir = 'packages'
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class DebianPackage:
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def __init__(self, name):
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self.name = name
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self.remaining_dependencies = set() # String
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self.sub_packages = set() # String
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self.prerequisite_for = set() # Packages that needs this package
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all_packages = [] # List of all DebianPackage:s
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packages_map = {} # Mapping from package name to DebianPackage (if subpackage, mapping from subpackage name to parent package)
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for subdir_name in sorted(os.listdir(packages_dir)):
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subdir_path = packages_dir + '/' + subdir_name
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if os.path.exists(subdir_path + '/BROKEN.txt'): continue
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build_sh_path = subdir_path + '/build.sh'
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this_package = DebianPackage(subdir_name)
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all_packages.append(this_package)
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packages_map[this_package.name] = this_package
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if not os.path.isfile(build_sh_path): die('The directory ' + subdir_name + ' does not contain build.sh')
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with open(build_sh_path) as build_sh_file:
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for line in build_sh_file:
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if line.startswith('TERMUX_PKG_DEPENDS='):
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deps_comma_separated = line[(line.index('=')+2):(len(line)-2)]
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for dep in deps_comma_separated.split(','):
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dep = dep.strip()
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if not dep.endswith('libandroid-support-dev'): this_package.remaining_dependencies.add(dep)
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for file_in_subdir_name in sorted(os.listdir(subdir_path)):
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if file_in_subdir_name.endswith('.subpackage.sh'):
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subpackage_name = file_in_subdir_name[0:-len(".subpackage.sh"):]
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this_package.sub_packages.add(subpackage_name)
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packages_map[subpackage_name] = this_package
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with open(subdir_path + '/' + file_in_subdir_name) as subpackage_sh_file:
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for line in subpackage_sh_file:
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if line.startswith('TERMUX_SUBPKG_DEPENDS='):
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deps_comma_separated = line[(line.index('=')+2):(len(line)-2)]
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for dep in deps_comma_separated.split(','):
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dep = dep.strip()
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this_package.remaining_dependencies.add(dep)
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this_package.remaining_dependencies.discard(this_package.name) # Do not depend on itself
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this_package.remaining_dependencies.difference_update(this_package.sub_packages) # Do not depend on any sub package
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for package in all_packages:
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for remaining in package.remaining_dependencies:
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if not remaining in packages_map: die('Package ' + package.name + ' depends on non-existing package "' + remaining + '"')
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packages_map[remaining].prerequisite_for.add(package)
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# List of all DebianPackage:s without dependencies
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packages_without_deps = [p for p in all_packages if not p.remaining_dependencies]
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if not packages_without_deps: die('No package without dependency - where to start?')
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# Sort alphabetically, but with libandroid-support first (since dependency on libandroid-support
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# does not need to be declared explicitly, so anything might in theory depend on it to build):
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packages_without_deps.sort(key=lambda p: 'aaaa' if p.name == 'libandroid-support' else p.name, reverse=True)
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# Topological sorting
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build_order = []
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while packages_without_deps:
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pkg = packages_without_deps.pop()
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build_order.append(pkg)
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for other_package in pkg.prerequisite_for:
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other_package.remaining_dependencies.discard(pkg.name) # Remove this package
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other_package.remaining_dependencies.difference_update(pkg.sub_packages) # .. and all its subpackages
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if not other_package.remaining_dependencies:
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# Check if the other package is ready to build now
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packages_without_deps.append(other_package)
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if len(all_packages) != len(build_order):
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print("ERROR: Cycle exists. Remaining: ");
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for pkg in all_packages:
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if pkg not in build_order: print(pkg.name)
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sys.exit(1)
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for pkg in build_order: print(pkg.name)
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