2 # buildorder.py - script to generate a build order respecting package dependencies
7 from itertools
import filterfalse
10 # https://docs.python.org/3/library/itertools.html#itertools-recipes
12 def unique_everseen(iterable
, key
=None):
13 "List unique elements, preserving order. Remember all elements ever seen."
14 # unique_everseen('AAAABBBCCDAABBB') --> A B C D
15 # unique_everseen('ABBCcAD', str.lower) --> A B C D
19 for element
in filterfalse(seen
.__contains__
, iterable
):
23 for element
in iterable
:
31 sys
.exit('ERROR: ' + msg
)
34 class TermuxBuildFile(object):
35 def __init__(self
, path
):
38 def _get_dependencies(self
):
39 pkg_dep_prefix
= 'TERMUX_PKG_DEPENDS='
40 subpkg_dep_prefix
= 'TERMUX_SUBPKG_DEPENDS='
42 with
open(self
.path
) as f
:
45 if line
.startswith(pkg_dep_prefix
):
46 prefix
= pkg_dep_prefix
47 elif line
.startswith(subpkg_dep_prefix
):
48 prefix
= subpkg_dep_prefix
52 comma_deps
= line
[len(prefix
):].replace('"', '')
55 dep
.strip() for dep
in comma_deps
.split(',')
56 if 'libandroid-support' not in dep
63 class TermuxPackage(object):
64 PACKAGES_DIR
= 'packages'
66 def __init__(self
, name
):
68 self
.dir = os
.path
.join(self
.PACKAGES_DIR
, name
)
70 # search package build.sh
71 build_sh_path
= os
.path
.join(self
.dir, 'build.sh')
72 if not os
.path
.isfile(build_sh_path
):
73 raise Exception("build.sh not found")
75 self
.buildfile
= TermuxBuildFile(build_sh_path
)
76 self
.deps
= self
.buildfile
._get_dependencies()
81 for filename
in os
.listdir(self
.dir):
82 if not filename
.endswith('.subpackage.sh'):
85 subpkg_name
= filename
.split('.subpackage.sh')[0]
86 subpkg
= TermuxSubPackage(subpkg_name
, parent
=self
)
88 self
.subpkgs
.append(subpkg
)
89 self
.deps |
= subpkg
.deps
91 # Do not depend on itself
92 self
.deps
.discard(self
.name
)
93 # Do not depend on any sub package
94 self
.deps
.difference_update([subpkg
.name
for subpkg
in self
.subpkgs
])
96 self
.needed_by
= set() # to be completed outside, reverse of deps
99 return "<{} '{}'>".format(self
.__class__
.__name__
, self
.name
)
102 class TermuxSubPackage(TermuxPackage
):
104 def __init__(self
, name
, parent
=None):
106 raise Exception("SubPackages should have a parent")
110 self
.buildfile
= TermuxBuildFile(os
.path
.join(self
.parent
.dir, name
+ '.subpackage.sh'))
111 self
.deps
= self
.buildfile
._get_dependencies()
114 return "<{} '{}' parent='{}'>".format(self
.__class__
.__name__
, self
.name
, self
.parent
)
117 # Tracks non-visited deps for each package
120 # Mapping from package name to TermuxPackage
121 # (if subpackage, mapping from subpackage name to parent package)
124 # Reverse dependencies
127 PACKAGES_DIR
= 'packages'
132 for pkgdir_name
in sorted(os
.listdir(PACKAGES_DIR
)):
134 pkg
= TermuxPackage(pkgdir_name
)
136 pkgs_map
[pkg
.name
] = pkg
138 for subpkg
in pkg
.subpkgs
:
139 pkgs_map
[subpkg
.name
] = pkg
140 remaining_deps
[subpkg
.name
] = set(subpkg
.deps
)
142 remaining_deps
[pkg
.name
] = set(pkg
.deps
)
144 all_pkg_names
= set(pkgs_map
.keys())
146 for name
, pkg
in pkgs_map
.items():
147 for dep_name
in remaining_deps
[name
]:
148 if dep_name
not in all_pkg_names
:
149 die('Package %s depends on non-existing package "%s"' %
(
153 dep_pkg
= pkgs_map
[dep_name
]
154 dep_pkg
.needed_by
.add(pkg
)
157 def generate_full_buildorder():
160 # List of all TermuxPackages without dependencies
161 leaf_pkgs
= [pkg
for name
, pkg
in pkgs_map
.items() if not pkg
.deps
]
164 die('No package without dependencies - where to start?')
166 # Sort alphabetically, but with libandroid-support first (since dependency on libandroid-support
167 # does not need to be declared explicitly, so anything might in theory depend on it to build):
168 pkg_queue
= sorted(leaf_pkgs
, key
=lambda p
: '' if p
.name
== 'libandroid-support' else p
.name
)
170 # Topological sorting
174 pkg
= pkg_queue
.pop(0)
175 if pkg
.name
in visited
:
178 # print("Processing {}:".format(pkg.name), pkg.needed_by)
179 visited
.add(pkg
.name
)
180 build_order
.append(pkg
)
182 for other_pkg
in sorted(pkg
.needed_by
, key
=lambda p
: p
.name
):
183 # Remove this pkg from deps
184 remaining_deps
[other_pkg
.name
].discard(pkg
.name
)
185 # ... and all its subpackages
186 remaining_deps
[other_pkg
.name
].difference_update(
187 [subpkg
.name
for subpkg
in pkg
.subpkgs
]
190 if not remaining_deps
[other_pkg
.name
]: # all deps were already appended?
191 pkg_queue
.append(other_pkg
) # should be processed
193 if set(pkgs_map
.values()) != set(build_order
):
194 print("ERROR: Cycle exists. Remaining: ")
195 for name
, pkg
in pkgs_map
.items():
196 if pkg
not in build_order
:
197 print(name
, remaining_deps
[name
])
204 def deps_then_me(pkg
):
207 for dep
in sorted(pkg
.deps
):
208 l
+= deps_then_me(pkgs_map
[dep
])
214 def generate_targets_buildorder(targetnames
):
217 for pkgname
in targetnames
:
218 buildorder
+= deps_then_me(pkgs_map
[pkgname
])
220 return unique_everseen(buildorder
)
222 if __name__
== '__main__':
225 if len(sys
.argv
) == 1:
226 bo
= generate_full_buildorder()
228 bo
= generate_targets_buildorder(sys
.argv
[1:])