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import solv
OPERATOR_TO_FLAGS = {
"=": solv.REL_EQ,
"<": solv.REL_LT,
">": solv.REL_GT,
"<=": solv.REL_EQ | solv.REL_LT,
">=": solv.REL_EQ | solv.REL_GT,
}
def get_operator_and_version(spec):
spec.strip()
for operator in OPERATOR_TO_FLAGS.keys():
if spec.startswith(operator):
version = spec[len(operator):].strip()
return operator, version
raise Exception("Could not parse %s" % spec)
def get_versions_or_error(sdists, overall_requirements, debug=False):
def log(*args):
if debug:
print(args)
if sdists is None or (len(sdists) == 1 and sdists[0] is None):
sdists = []
if overall_requirements is None or (
len(overall_requirements) == 1 and overall_requirements[0] is None
):
overall_requirements = []
if len(overall_requirements) == 0:
log("overall_requirements", overall_requirements)
return []
log(sdists)
log(overall_requirements)
pool = solv.Pool()
pool.setarch()
sysrepo = pool.add_repo("@System")
repo = pool.add_repo("test")
repo.create_stubs()
solvables = {}
log("Creating solvables")
for name, version, requirements in sdists:
solvable = repo.add_solvable()
solvable.name = name
solvable.evr = version
solvable.arch = "noarch"
log(solvable.name, solvable.id)
solvables[(name, version)] = solvable
rel_id = pool.rel2id(
solvable.nameid,
solvable.evrid,
OPERATOR_TO_FLAGS["="],
True,
)
solvable.add_deparray(solv.SOLVABLE_PROVIDES, rel_id)
log("Adding requirements")
for name, version, requirements in sdists:
if requirements is None:
requirements = []
solvable = solvables[(name, version)]
log("requirements for", name, version)
for requirement_name, requirement_specifiers in requirements:
log("requirement name ", requirement_name)
requirement_name_id = pool.str2id(requirement_name, False)
if requirement_name_id == 0:
return "Could not find package for requirement %s" % requirement_name
if requirement_specifiers is None:
requirement_specifiers = []
log("specifiers ", requirement_specifiers)
if len(requirement_specifiers) == 0:
solvable.add_deparray(solv.SOLVABLE_REQUIRES, requirement_name_id)
else:
for spec in requirement_specifiers:
if "!=" in spec:
# TODO: Support this
continue
try:
spec_operator, spec_version = get_operator_and_version(spec)
except Exception as e:
return str(e)
requirement_evr_id = pool.str2id(spec_version, True)
log(requirement_name_id, requirement_evr_id)
rel_id = pool.rel2id(
requirement_name_id,
requirement_evr_id,
OPERATOR_TO_FLAGS[spec_operator],
True,
)
log("rel_id", rel_id, requirement_name, spec_operator, spec_version)
solvable.add_deparray(solv.SOLVABLE_REQUIRES, rel_id)
addedprovides = pool.addfileprovides_queue()
if addedprovides:
sysrepo.updateaddedprovides(addedprovides)
repo.updateaddedprovides(addedprovides)
pool.createwhatprovides()
jobs = []
for arg in overall_requirements:
flags = (
solv.Selection.SELECTION_REL |
solv.Selection.SELECTION_NAME |
solv.Selection.SELECTION_WITH_SOURCE
)
sel = pool.select(arg, flags)
if sel.isempty():
error = "nothing matches '%s'" % arg
log(error)
return error
if sel.flags() & solv.Selection.SELECTION_FILELIST:
log("[using file list match for '%s']" % arg)
if sel.flags() & solv.Selection.SELECTION_PROVIDES:
log("[using capability match for '%s']" % arg)
jobs += sel.jobs(solv.Job.SOLVER_INSTALL)
for job in jobs:
for solvable in job.solvables():
solvable_url = solvable.lookup_str(solv.SOLVABLE_URL)
if solvable_url:
log("Url: %s" % solvable_url)
solvable_license = solvable.lookup_str(solv.SOLVABLE_LICENSE)
if solvable_license:
log("License: %s" % solvable_license)
pool.set_debuglevel(0)
solver = pool.Solver()
while True:
problems = solver.solve(jobs)
if not problems:
break
return str([str(p) for p in problems])
# no problems, show transaction
trans = solver.transaction()
del solver
if trans.isempty():
return "transaction is empty"
for cl in trans.classify(
solv.Transaction.SOLVER_TRANSACTION_SHOW_OBSOLETES |
solv.Transaction.SOLVER_TRANSACTION_OBSOLETE_IS_UPGRADE,
):
if cl.type == solv.Transaction.SOLVER_TRANSACTION_INSTALL:
versions = []
for p in cl.solvables():
log(" - %s" % p)
versions.append((p.name, p.evr))
return versions
return "unknown error"
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