#!/usr/bin/env python3
# buildorder.py - script to generate a build order respecting package dependencies
-import os, sys
-
-def die(msg): sys.exit('ERROR: ' + msg)
-
-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
-
-all_packages = [] # List of all DebianPackage:s
-packages_map = {} # Mapping from package name to DebianPackage (if subpackage, mapping from subpackage name to parent package)
-
-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
-
- 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)
-
-# 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?')
-
-# 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)
-
-# 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)
-
-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)
-
-for pkg in build_order: print(pkg.name)
+import os
+import sys
+from itertools import filterfalse
+
+
+# https://docs.python.org/3/library/itertools.html#itertools-recipes
+
+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
+
+
+def die(msg):
+ sys.exit('ERROR: ' + msg)
+
+
+class TermuxBuildFile(object):
+ def __init__(self, path):
+ self.path = path
+
+ def _get_dependencies(self):
+ pkg_dep_prefix = 'TERMUX_PKG_DEPENDS='
+ subpkg_dep_prefix = 'TERMUX_SUBPKG_DEPENDS='
+
+ 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
+
+ comma_deps = line[len(prefix):].replace('"', '')
+
+ return set([
+ dep.strip() for dep in comma_deps.split(',')
+ if 'libandroid-support' not in dep
+ ])
+
+ # 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)
~mdw / termux-packages / commitdiff