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 pkg_build_dep_prefix
= 'TERMUX_PKG_BUILD_DEPENDS='
42 subpkg_dep_prefix
= 'TERMUX_SUBPKG_DEPENDS='
44 with
open(self
.path
, encoding
="utf-8") as f
:
47 if line
.startswith(pkg_dep_prefix
):
48 prefix
= pkg_dep_prefix
49 elif line
.startswith(pkg_build_dep_prefix
):
50 prefix
= pkg_build_dep_prefix
51 elif line
.startswith(subpkg_dep_prefix
):
52 prefix
= subpkg_dep_prefix
56 comma_deps
= line
[len(prefix
):].replace('"', '').replace("'", '')
59 # Replace parenthesis to handle version qualifiers, as in "gcc (>= 5.0)":
60 re
.sub(r
'\(.*?\)', '', dep
).replace('-dev', '').strip() for dep
in comma_deps
.split(',')
67 class TermuxPackage(object):
68 PACKAGES_DIR
= 'packages'
70 def __init__(self
, name
):
72 self
.dir = os
.path
.join(self
.PACKAGES_DIR
, name
)
74 # search package build.sh
75 build_sh_path
= os
.path
.join(self
.dir, 'build.sh')
76 if not os
.path
.isfile(build_sh_path
):
77 raise Exception("build.sh not found for package '" + name
+ "'")
79 self
.buildfile
= TermuxBuildFile(build_sh_path
)
80 self
.deps
= self
.buildfile
._get_dependencies()
81 if 'libandroid-support' not in self
.deps
and self
.name
!= 'libandroid-support':
82 # Every package may depend on libandroid-support without declaring it:
83 self
.deps
.add('libandroid-support')
88 for filename
in os
.listdir(self
.dir):
89 if not filename
.endswith('.subpackage.sh'):
92 subpkg_name
= filename
.split('.subpackage.sh')[0]
93 subpkg
= TermuxSubPackage(subpkg_name
, parent
=self
)
95 self
.subpkgs
.append(subpkg
)
96 self
.deps |
= subpkg
.deps
98 # Do not depend on itself
99 self
.deps
.discard(self
.name
)
100 # Do not depend on any sub package
101 self
.deps
.difference_update([subpkg
.name
for subpkg
in self
.subpkgs
])
103 self
.needed_by
= set() # to be completed outside, reverse of deps
106 return "<{} '{}'>".format(self
.__class__
.__name__
, self
.name
)
109 class TermuxSubPackage(TermuxPackage
):
111 def __init__(self
, name
, parent
=None):
113 raise Exception("SubPackages should have a parent")
117 self
.buildfile
= TermuxBuildFile(os
.path
.join(self
.parent
.dir, name
+ '.subpackage.sh'))
118 self
.deps
= self
.buildfile
._get_dependencies()
121 return "<{} '{}' parent='{}'>".format(self
.__class__
.__name__
, self
.name
, self
.parent
)
124 # Tracks non-visited deps for each package
127 # Mapping from package name to TermuxPackage
128 # (if subpackage, mapping from subpackage name to parent package)
131 # Reverse dependencies
134 PACKAGES_DIR
= 'packages'
139 for pkgdir_name
in sorted(os
.listdir(PACKAGES_DIR
)):
141 pkg
= TermuxPackage(pkgdir_name
)
143 pkgs_map
[pkg
.name
] = pkg
145 for subpkg
in pkg
.subpkgs
:
146 pkgs_map
[subpkg
.name
] = pkg
147 remaining_deps
[subpkg
.name
] = set(subpkg
.deps
)
149 remaining_deps
[pkg
.name
] = set(pkg
.deps
)
151 all_pkg_names
= set(pkgs_map
.keys())
153 for name
, pkg
in pkgs_map
.items():
154 for dep_name
in remaining_deps
[name
]:
155 if dep_name
not in all_pkg_names
:
156 die('Package %s depends on non-existing package "%s"' %
(
160 dep_pkg
= pkgs_map
[dep_name
]
161 dep_pkg
.needed_by
.add(pkg
)
164 def generate_full_buildorder():
167 # List of all TermuxPackages without dependencies
168 leaf_pkgs
= [pkg
for name
, pkg
in pkgs_map
.items() if not pkg
.deps
]
171 die('No package without dependencies - where to start?')
173 # Sort alphabetically:
174 pkg_queue
= sorted(leaf_pkgs
, key
=lambda p
: p
.name
)
176 # Topological sorting
180 pkg
= pkg_queue
.pop(0)
181 if pkg
.name
in visited
:
184 # print("Processing {}:".format(pkg.name), pkg.needed_by)
185 visited
.add(pkg
.name
)
186 build_order
.append(pkg
)
188 for other_pkg
in sorted(pkg
.needed_by
, key
=lambda p
: p
.name
):
189 # Remove this pkg from deps
190 remaining_deps
[other_pkg
.name
].discard(pkg
.name
)
191 # ... and all its subpackages
192 remaining_deps
[other_pkg
.name
].difference_update(
193 [subpkg
.name
for subpkg
in pkg
.subpkgs
]
196 if not remaining_deps
[other_pkg
.name
]: # all deps were already appended?
197 pkg_queue
.append(other_pkg
) # should be processed
199 if set(pkgs_map
.values()) != set(build_order
):
200 print("ERROR: Cycle exists. Remaining: ")
201 for name
, pkg
in pkgs_map
.items():
202 if pkg
not in build_order
:
203 print(name
, remaining_deps
[name
])
210 def deps_then_me(pkg
):
213 for dep
in sorted(pkg
.deps
):
214 l
+= deps_then_me(pkgs_map
[dep
])
220 def generate_targets_buildorder(targetnames
):
223 for pkgname
in targetnames
:
224 if not pkgname
in pkgs_map
:
225 die('Dependencies for ' + pkgname
+ ' could not be calculated (skip dependency check with -s)')
226 buildorder
+= deps_then_me(pkgs_map
[pkgname
])
228 return unique_everseen(buildorder
)
230 if __name__
== '__main__':
233 if len(sys
.argv
) == 1:
234 bo
= generate_full_buildorder()
236 bo
= generate_targets_buildorder(sys
.argv
[1:])