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refactor metadata parser to class

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Signed-off-by: Igor Gnatenko <ignatenkobrain@fedoraproject.org>
This commit is contained in:
Igor Gnatenko 2017-01-31 22:38:54 +01:00
parent 99f6926156
commit 4ff91cb101
1 changed files with 110 additions and 62 deletions
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172
cargodeps.py
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@ -14,54 +14,109 @@ REQ_TO_CON = {">": "<=",
">=": "<",
"<=": ">"}
def get_metadata(path):
# --no-deps is to disable recursive scanning of deps
metadata = subprocess.check_output(["cargo", "metadata", "--no-deps",
"--manifest-path={}".format(path)])
return json.loads(metadata)["packages"][0]
class Dependency(object):
def __init__(self, name, spec, feature=None, inverted=False):
self.name = name
self.spec = spec
self.feature = feature
self.inverted = inverted
def parse_req(s):
if "*" in s:
raise NotImplementedError("https://github.com/rbarrois/python-semanticversion/issues/51")
spec = semver.Spec(s.replace(" ", ""))
specs = spec.specs
if len(specs) == 1:
req = specs[0]
if req.kind in (req.KIND_CARET, req.KIND_TILDE):
ver = req.spec
lower = semver.Version.coerce(str(ver))
if req.kind == req.KIND_CARET:
if ver.major == 0:
if ver.minor is not None:
if ver.patch is None or ver.minor != 0:
upper = ver.next_minor()
else:
upper = ver.next_patch()
else:
upper = ver.next_major()
else:
upper = ver.next_major()
elif req.kind == req.KIND_TILDE:
if ver.minor is None:
upper = ver.next_major()
else:
upper = ver.next_minor()
else:
assert False
return (semver.Spec(">={}".format(lower)).specs[0],
semver.Spec("<{}".format(upper)).specs[0])
def __repr__(self):
f_part = "/{}".format(self.feature) if self.feature is not None else ""
if self.inverted:
kind = REQ_TO_CON[self.spec.kind]
else:
return (req, None)
elif len(specs) == 2:
return (specs[0], specs[1])
else:
# it's something uber-complicated
raise NotImplementedError("More than two ranges are unsupported, probably something is wrong with metadata")
assert False
kind = self.spec.kind
return "crate({}{}) {} {}".format(self.name, f_part, kind.replace("==", "="), self.spec.spec)
def print_dep(name, spec, kind="=", feature=None):
f_part = "/{}".format(feature) if feature is not None else ""
print("crate({}{}) {} {}".format(name, f_part, kind.replace("==", "="), spec))
class Metadata(object):
def __init__(self, path):
self._provides = []
self._requires = []
self._conflicts = []
# --no-deps is to disable recursive scanning of deps
metadata = subprocess.check_output(["cargo", "metadata", "--no-deps",
"--manifest-path={}".format(path)])
self._parse_metadata(json.loads(metadata))
@staticmethod
def _parse_req(s):
if "*" in s:
raise NotImplementedError("https://github.com/rbarrois/python-semanticversion/issues/51")
spec = semver.Spec(s.replace(" ", ""))
specs = spec.specs
if len(specs) == 1:
req = specs[0]
if req.kind in (req.KIND_CARET, req.KIND_TILDE):
ver = req.spec
lower = semver.Version.coerce(str(ver))
if req.kind == req.KIND_CARET:
if ver.major == 0:
if ver.minor is not None:
if ver.patch is None or ver.minor != 0:
upper = ver.next_minor()
else:
upper = ver.next_patch()
else:
upper = ver.next_major()
else:
upper = ver.next_major()
elif req.kind == req.KIND_TILDE:
if ver.minor is None:
upper = ver.next_major()
else:
upper = ver.next_minor()
else:
assert False
return (semver.Spec(">={}".format(lower)).specs[0],
semver.Spec("<{}".format(upper)).specs[0])
else:
return (req, None)
elif len(specs) == 2:
return (specs[0], specs[1])
else:
# it's something uber-complicated
raise NotImplementedError("More than two ranges are unsupported, "
"probably something is wrong with metadata")
assert False
def _parse_metadata(self, metadata):
md = metadata["packages"][0]
name = md["name"]
version = semver.SpecItem("={}".format(md["version"]))
# Provides
self._provides = [Dependency(name, version)]
for feature in md["features"]:
self._provides.append(Dependency(name, version, feature=feature))
# Requires, Conflicts
self._requires = []
self._conflicts = []
for dep in md["dependencies"]:
if dep["kind"] is not None:
# kind: build -> build dependencies
# kind: dev -> test dependencies
continue
req, con = self._parse_req(dep["req"])
assert req is not None
for feature in dep["features"] or [None]:
self._requires.append(Dependency(dep["name"], req, feature=feature))
if con is not None:
self._conflicts.append(Dependency(dep["name"], con, feature=feature, inverted=True))
@property
def provides(self):
return self._provides[:]
@property
def requires(self):
return self._requires[:]
@property
def conflicts(self):
return self._conflicts[:]
if __name__ == "__main__":
parser = argparse.ArgumentParser()
@ -74,23 +129,16 @@ if __name__ == "__main__":
files = args.file or sys.stdin.readlines()
def print_deps(deps):
if len(deps) > 0:
print("\n".join(str(dep) for dep in deps))
for f in files:
f = f.rstrip()
md = get_metadata(f)
md = Metadata(f)
if args.provides:
print_dep(md["name"], md["version"])
for feature in md["features"]:
print_dep(md["name"], md["version"], feature=feature)
if args.requires or args.conflicts:
for dep in md["dependencies"]:
if dep["kind"] is not None:
# kind: build -> build dependencies
# kind: dev -> test dependencies
continue
req, con = parse_req(dep["req"])
assert req is not None
for feature in dep["features"] or [None]:
if args.requires:
print_dep(dep["name"], req.spec, req.kind, feature=feature)
if args.conflicts and con is not None:
print_dep(dep["name"], con.spec, REQ_TO_CON[con.kind], feature=feature)
print_deps(md.provides)
if args.requires:
print_deps(md.requires)
if args.conflicts:
print_deps(md.conflicts)