chiark - git - mdw - termux-packages/blob - buildorder.py

   1 #!/usr/bin/env python3
   2 # buildorder.py - script to generate a build order respecting package dependencies
   3
   4 import os
   5 import sys
   6
   7
   8 def die(msg):
   9     sys.exit('ERROR: ' + msg)
  10
  11
  12 if len(sys.argv) != 1:
  13     die('buildorder.py takes no arguments')
  14
  15
  16 class DebianPackage(object):
  17     def __init__(self, name):
  18         self.name = name
  19         self.remaining_dependencies = set()  # String
  20         self.sub_packages = set()  # String
  21         self.prerequisite_for = set()  # Packages that needs this package
  22
  23 # List of all DebianPackage:s
  24 all_packages = []
  25
  26 # Mapping from package name to DebianPackage
  27 # (if subpackage, mapping from subpackage name to parent package)
  28 packages_map = {}
  29
  30 packages_dir = 'packages'
  31
  32
  33 for subdir_name in sorted(os.listdir(packages_dir)):
  34     subdir_path = packages_dir + '/' + subdir_name
  35
  36     if os.path.exists(subdir_path + '/BROKEN.txt'):
  37         continue
  38
  39     build_sh_path = subdir_path + '/build.sh'
  40
  41     this_package = DebianPackage(subdir_name)
  42     all_packages.append(this_package)
  43     packages_map[this_package.name] = this_package
  44
  45     if not os.path.isfile(build_sh_path):
  46         die('The directory ' + subdir_name + ' does not contain build.sh')
  47
  48     with open(build_sh_path) as build_sh_file:
  49         for line in build_sh_file:
  50             if line.startswith('TERMUX_PKG_DEPENDS='):
  51                 deps_comma_separated = line[(line.index('=')+2):(len(line)-2)]
  52                 for dep in deps_comma_separated.split(','):
  53                     dep = dep.strip()
  54                     if not dep.endswith('libandroid-support-dev'):
  55                         this_package.remaining_dependencies.add(dep)
  56     for file_in_subdir_name in sorted(os.listdir(subdir_path)):
  57         if file_in_subdir_name.endswith('.subpackage.sh'):
  58             subpackage_name = file_in_subdir_name[0:-len(".subpackage.sh"):]
  59             this_package.sub_packages.add(subpackage_name)
  60             packages_map[subpackage_name] = this_package
  61             with open(subdir_path + '/' + file_in_subdir_name) as subpackage_sh_file:
  62                 for line in subpackage_sh_file:
  63                     if line.startswith('TERMUX_SUBPKG_DEPENDS='):
  64                         deps_comma_separated = line[(line.index('=')+2):(len(line)-2)]
  65                         for dep in deps_comma_separated.split(','):
  66                             dep = dep.strip()
  67                             this_package.remaining_dependencies.add(dep)
  68     # Do not depend on itself
  69     this_package.remaining_dependencies.discard(this_package.name)
  70     # Do not depend on any sub package
  71     this_package.remaining_dependencies.difference_update(this_package.sub_packages)
  72
  73 for package in all_packages:
  74     for remaining in package.remaining_dependencies:
  75         if remaining not in packages_map:
  76             die('Package ' + package.name + ' depends on non-existing package "' + remaining + '"')
  77         packages_map[remaining].prerequisite_for.add(package)
  78
  79 # List of all DebianPackage:s without dependencies
  80 packages_without_deps = [p for p in all_packages if not p.remaining_dependencies]
  81 if not packages_without_deps:
  82     die('No package without dependency - where to start?')
  83
  84 # Sort alphabetically, but with libandroid-support first (since dependency on libandroid-support
  85 # does not need to be declared explicitly, so anything might in theory depend on it to build):
  86
  87 packages_without_deps.sort(
  88     key=lambda p: '' if p.name == 'libandroid-support' else p.name,
  89     reverse=True)
  90
  91 # Topological sorting
  92 build_order = []
  93 while packages_without_deps:
  94     pkg = packages_without_deps.pop()
  95     build_order.append(pkg)
  96     for other_package in pkg.prerequisite_for:
  97         # Remove this package
  98         other_package.remaining_dependencies.discard(pkg.name)
  99         # .. and all its subpackages
 100         other_package.remaining_dependencies.difference_update(pkg.sub_packages)
 101         if not other_package.remaining_dependencies:
 102             # Check if the other package is ready to build now
 103             packages_without_deps.append(other_package)
 104
 105 if len(all_packages) != len(build_order):
 106     print("ERROR: Cycle exists. Remaining: ")
 107     for pkg in all_packages:
 108         if pkg not in build_order:
 109             print(pkg.name)
 110     sys.exit(1)
 111
 112 for pkg in build_order:
 113     print(pkg.name)