2 # buildorder.py - script to generate a build order respecting package dependencies
8 from itertools
import filterfalse
11 # https://docs.python.org/3/library/itertools.html#itertools-recipes
13 def unique_everseen(iterable
, key
=None):
14 "List unique elements, preserving order. Remember all elements ever seen."
15 # unique_everseen('AAAABBBCCDAABBB') --> A B C D
16 # unique_everseen('ABBCcAD', str.lower) --> A B C D
20 for element
in filterfalse(seen
.__contains__
, iterable
):
24 for element
in iterable
:
32 sys
.exit('ERROR: ' + msg
)
35 class TermuxBuildFile(object):
36 def __init__(self
, path
):
39 def _get_dependencies(self
):
40 pkg_dep_prefix
= 'TERMUX_PKG_DEPENDS='
41 subpkg_dep_prefix
= 'TERMUX_SUBPKG_DEPENDS='
43 with
open(self
.path
, encoding
="utf-8") as f
:
46 if line
.startswith(pkg_dep_prefix
):
47 prefix
= pkg_dep_prefix
48 elif line
.startswith(subpkg_dep_prefix
):
49 prefix
= subpkg_dep_prefix
53 comma_deps
= line
[len(prefix
):].replace('"', '').replace("'", '')
56 # Replace parenthesis to handle version qualifiers, as in "gcc (>= 5.0)":
57 re
.sub(r
'\(.*?\)', '', dep
).replace('-dev', '').strip() for dep
in comma_deps
.split(',')
64 class TermuxPackage(object):
65 PACKAGES_DIR
= 'packages'
67 def __init__(self
, name
):
69 self
.dir = os
.path
.join(self
.PACKAGES_DIR
, name
)
71 # search package build.sh
72 build_sh_path
= os
.path
.join(self
.dir, 'build.sh')
73 if not os
.path
.isfile(build_sh_path
):
74 raise Exception("build.sh not found for package '" + name
+ "'")
76 self
.buildfile
= TermuxBuildFile(build_sh_path
)
77 self
.deps
= self
.buildfile
._get_dependencies()
78 if 'libandroid-support' not in self
.deps
and self
.name
!= 'libandroid-support':
79 # Every package may depend on libandroid-support without declaring it:
80 self
.deps
.add('libandroid-support')
85 for filename
in os
.listdir(self
.dir):
86 if not filename
.endswith('.subpackage.sh'):
89 subpkg_name
= filename
.split('.subpackage.sh')[0]
90 subpkg
= TermuxSubPackage(subpkg_name
, parent
=self
)
92 self
.subpkgs
.append(subpkg
)
93 self
.deps |
= subpkg
.deps
95 # Do not depend on itself
96 self
.deps
.discard(self
.name
)
97 # Do not depend on any sub package
98 self
.deps
.difference_update([subpkg
.name
for subpkg
in self
.subpkgs
])
100 self
.needed_by
= set() # to be completed outside, reverse of deps
103 return "<{} '{}'>".format(self
.__class__
.__name__
, self
.name
)
106 class TermuxSubPackage(TermuxPackage
):
108 def __init__(self
, name
, parent
=None):
110 raise Exception("SubPackages should have a parent")
114 self
.buildfile
= TermuxBuildFile(os
.path
.join(self
.parent
.dir, name
+ '.subpackage.sh'))
115 self
.deps
= self
.buildfile
._get_dependencies()
118 return "<{} '{}' parent='{}'>".format(self
.__class__
.__name__
, self
.name
, self
.parent
)
121 # Tracks non-visited deps for each package
124 # Mapping from package name to TermuxPackage
125 # (if subpackage, mapping from subpackage name to parent package)
128 # Reverse dependencies
131 PACKAGES_DIR
= 'packages'
136 for pkgdir_name
in sorted(os
.listdir(PACKAGES_DIR
)):
138 pkg
= TermuxPackage(pkgdir_name
)
140 pkgs_map
[pkg
.name
] = pkg
142 for subpkg
in pkg
.subpkgs
:
143 pkgs_map
[subpkg
.name
] = pkg
144 remaining_deps
[subpkg
.name
] = set(subpkg
.deps
)
146 remaining_deps
[pkg
.name
] = set(pkg
.deps
)
148 all_pkg_names
= set(pkgs_map
.keys())
150 for name
, pkg
in pkgs_map
.items():
151 for dep_name
in remaining_deps
[name
]:
152 if dep_name
not in all_pkg_names
:
153 die('Package %s depends on non-existing package "%s"' %
(
157 dep_pkg
= pkgs_map
[dep_name
]
158 dep_pkg
.needed_by
.add(pkg
)
161 def generate_full_buildorder():
164 # List of all TermuxPackages without dependencies
165 leaf_pkgs
= [pkg
for name
, pkg
in pkgs_map
.items() if not pkg
.deps
]
168 die('No package without dependencies - where to start?')
170 # Sort alphabetically:
171 pkg_queue
= sorted(leaf_pkgs
, key
=lambda p
: p
.name
)
173 # Topological sorting
177 pkg
= pkg_queue
.pop(0)
178 if pkg
.name
in visited
:
181 # print("Processing {}:".format(pkg.name), pkg.needed_by)
182 visited
.add(pkg
.name
)
183 build_order
.append(pkg
)
185 for other_pkg
in sorted(pkg
.needed_by
, key
=lambda p
: p
.name
):
186 # Remove this pkg from deps
187 remaining_deps
[other_pkg
.name
].discard(pkg
.name
)
188 # ... and all its subpackages
189 remaining_deps
[other_pkg
.name
].difference_update(
190 [subpkg
.name
for subpkg
in pkg
.subpkgs
]
193 if not remaining_deps
[other_pkg
.name
]: # all deps were already appended?
194 pkg_queue
.append(other_pkg
) # should be processed
196 if set(pkgs_map
.values()) != set(build_order
):
197 print("ERROR: Cycle exists. Remaining: ")
198 for name
, pkg
in pkgs_map
.items():
199 if pkg
not in build_order
:
200 print(name
, remaining_deps
[name
])
207 def deps_then_me(pkg
):
210 for dep
in sorted(pkg
.deps
):
211 l
+= deps_then_me(pkgs_map
[dep
])
217 def generate_targets_buildorder(targetnames
):
220 for pkgname
in targetnames
:
221 if not pkgname
in pkgs_map
:
222 die('Dependencies for ' + pkgname
+ ' could not be calculated (skip dependency check with -s)')
223 buildorder
+= deps_then_me(pkgs_map
[pkgname
])
225 return unique_everseen(buildorder
)
227 if __name__
== '__main__':
230 if len(sys
.argv
) == 1:
231 bo
= generate_full_buildorder()
233 bo
= generate_targets_buildorder(sys
.argv
[1:])