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
) 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('"', '')
56 # Replace parenthesis to handle version qualifiers, as in "gcc (>= 5.0)":
57 re
.sub(r
'\(.*?\)', '', dep
).strip() for dep
in comma_deps
.split(',')
58 if 'libandroid-support' not in dep
65 class TermuxPackage(object):
66 PACKAGES_DIR
= 'packages'
68 def __init__(self
, name
):
70 self
.dir = os
.path
.join(self
.PACKAGES_DIR
, name
)
72 # search package build.sh
73 build_sh_path
= os
.path
.join(self
.dir, 'build.sh')
74 if not os
.path
.isfile(build_sh_path
):
75 raise Exception("build.sh not found for package '" + name
+ "'")
77 self
.buildfile
= TermuxBuildFile(build_sh_path
)
78 self
.deps
= self
.buildfile
._get_dependencies()
83 for filename
in os
.listdir(self
.dir):
84 if not filename
.endswith('.subpackage.sh'):
87 subpkg_name
= filename
.split('.subpackage.sh')[0]
88 subpkg
= TermuxSubPackage(subpkg_name
, parent
=self
)
90 self
.subpkgs
.append(subpkg
)
91 self
.deps |
= subpkg
.deps
93 # Do not depend on itself
94 self
.deps
.discard(self
.name
)
95 # Do not depend on any sub package
96 self
.deps
.difference_update([subpkg
.name
for subpkg
in self
.subpkgs
])
98 self
.needed_by
= set() # to be completed outside, reverse of deps
101 return "<{} '{}'>".format(self
.__class__
.__name__
, self
.name
)
104 class TermuxSubPackage(TermuxPackage
):
106 def __init__(self
, name
, parent
=None):
108 raise Exception("SubPackages should have a parent")
112 self
.buildfile
= TermuxBuildFile(os
.path
.join(self
.parent
.dir, name
+ '.subpackage.sh'))
113 self
.deps
= self
.buildfile
._get_dependencies()
116 return "<{} '{}' parent='{}'>".format(self
.__class__
.__name__
, self
.name
, self
.parent
)
119 # Tracks non-visited deps for each package
122 # Mapping from package name to TermuxPackage
123 # (if subpackage, mapping from subpackage name to parent package)
126 # Reverse dependencies
129 PACKAGES_DIR
= 'packages'
134 for pkgdir_name
in sorted(os
.listdir(PACKAGES_DIR
)):
136 pkg
= TermuxPackage(pkgdir_name
)
138 pkgs_map
[pkg
.name
] = pkg
140 for subpkg
in pkg
.subpkgs
:
141 pkgs_map
[subpkg
.name
] = pkg
142 remaining_deps
[subpkg
.name
] = set(subpkg
.deps
)
144 remaining_deps
[pkg
.name
] = set(pkg
.deps
)
146 all_pkg_names
= set(pkgs_map
.keys())
148 for name
, pkg
in pkgs_map
.items():
149 for dep_name
in remaining_deps
[name
]:
150 if dep_name
not in all_pkg_names
:
151 die('Package %s depends on non-existing package "%s"' %
(
155 dep_pkg
= pkgs_map
[dep_name
]
156 dep_pkg
.needed_by
.add(pkg
)
159 def generate_full_buildorder():
162 # List of all TermuxPackages without dependencies
163 leaf_pkgs
= [pkg
for name
, pkg
in pkgs_map
.items() if not pkg
.deps
]
166 die('No package without dependencies - where to start?')
168 # Sort alphabetically, but with libandroid-support first (since dependency on libandroid-support
169 # does not need to be declared explicitly, so anything might in theory depend on it to build):
170 pkg_queue
= sorted(leaf_pkgs
, key
=lambda p
: '' if p
.name
== 'libandroid-support' else p
.name
)
172 # Topological sorting
176 pkg
= pkg_queue
.pop(0)
177 if pkg
.name
in visited
:
180 # print("Processing {}:".format(pkg.name), pkg.needed_by)
181 visited
.add(pkg
.name
)
182 build_order
.append(pkg
)
184 for other_pkg
in sorted(pkg
.needed_by
, key
=lambda p
: p
.name
):
185 # Remove this pkg from deps
186 remaining_deps
[other_pkg
.name
].discard(pkg
.name
)
187 # ... and all its subpackages
188 remaining_deps
[other_pkg
.name
].difference_update(
189 [subpkg
.name
for subpkg
in pkg
.subpkgs
]
192 if not remaining_deps
[other_pkg
.name
]: # all deps were already appended?
193 pkg_queue
.append(other_pkg
) # should be processed
195 if set(pkgs_map
.values()) != set(build_order
):
196 print("ERROR: Cycle exists. Remaining: ")
197 for name
, pkg
in pkgs_map
.items():
198 if pkg
not in build_order
:
199 print(name
, remaining_deps
[name
])
206 def deps_then_me(pkg
):
209 for dep
in sorted(pkg
.deps
):
210 l
+= deps_then_me(pkgs_map
[dep
])
216 def generate_targets_buildorder(targetnames
):
219 for pkgname
in targetnames
:
220 buildorder
+= deps_then_me(pkgs_map
[pkgname
])
222 return unique_everseen(buildorder
)
224 if __name__
== '__main__':
227 if len(sys
.argv
) == 1:
228 bo
= generate_full_buildorder()
230 bo
= generate_targets_buildorder(sys
.argv
[1:])