automatic import of pyproject-rpm-macros

1 files changed, 171 insertions, 0 deletions

diff --git a/pyproject_convert.py b/pyproject_convert.py
new file mode 100644
index 0000000..ea01bc3
--- /dev/null
+++ b/pyproject_convert.py
@@ -0,0 +1,171 @@
+# Copyright 2019 Gordon Messmer <gordon.messmer@gmail.com>
+#
+# Upstream: https://github.com/gordonmessmer/pyreq2rpm
+#
+# Permission is hereby granted, free of charge, to any person
+# obtaining a copy of this software and associated documentation files
+# (the "Software"), to deal in the Software without restriction,
+# including without limitation the rights to use, copy, modify, merge,
+# publish, distribute, sublicense, and/or sell copies of the Software,
+# and to permit persons to whom the Software is furnished to do so,
+# subject to the following conditions:
+#
+# The above copyright notice and this permission notice shall be
+# included in all copies or substantial portions of the Software.
+#
+# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+# BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+# ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+# CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+# SOFTWARE.
+
+from packaging.requirements import Requirement
+from packaging.version import parse as parse_version
+
+class RpmVersion():
+    def __init__(self, version_id):
+        version = parse_version(version_id)
+        if isinstance(version._version, str):
+            self.version = version._version
+        else:
+            self.epoch = version._version.epoch
+            self.version = list(version._version.release)
+            self.pre = version._version.pre
+            self.dev = version._version.dev
+            self.post = version._version.post
+            # version.local is ignored as it is not expected to appear
+            # in public releases
+            # https://www.python.org/dev/peps/pep-0440/#local-version-identifiers
+
+    def is_legacy(self):
+        return isinstance(self.version, str)
+
+    def increment(self):
+        self.version[-1] += 1
+        self.pre = None
+        self.dev = None
+        self.post = None
+        return self
+
+    def __str__(self):
+        if self.is_legacy():
+            return self.version
+        if self.epoch:
+            rpm_epoch = str(self.epoch) + ':'
+        else:
+            rpm_epoch = ''
+        while len(self.version) > 1 and self.version[-1] == 0:
+            self.version.pop()
+        rpm_version = '.'.join(str(x) for x in self.version)
+        if self.pre:
+            rpm_suffix = '~{}'.format(''.join(str(x) for x in self.pre))
+        elif self.dev:
+            rpm_suffix = '~~{}'.format(''.join(str(x) for x in self.dev))
+        elif self.post:
+            rpm_suffix = '^post{}'.format(self.post[1])
+        else:
+            rpm_suffix = ''
+        return '{}{}{}'.format(rpm_epoch, rpm_version, rpm_suffix)
+
+def convert_compatible(name, operator, version_id):
+    if version_id.endswith('.*'):
+        return 'Invalid version'
+    version = RpmVersion(version_id)
+    if version.is_legacy():
+        # LegacyVersions are not supported in this context
+        return 'Invalid version'
+    if len(version.version) == 1:
+        return 'Invalid version'
+    upper_version = RpmVersion(version_id)
+    upper_version.version.pop()
+    upper_version.increment()
+    return '({} >= {} with {} < {})'.format(
+        name, version, name, upper_version)
+
+def convert_equal(name, operator, version_id):
+    if version_id.endswith('.*'):
+        version_id = version_id[:-2] + '.0'
+        return convert_compatible(name, '~=', version_id)
+    version = RpmVersion(version_id)
+    return '{} = {}'.format(name, version)
+
+def convert_arbitrary_equal(name, operator, version_id):
+    if version_id.endswith('.*'):
+        return 'Invalid version'
+    version = RpmVersion(version_id)
+    return '{} = {}'.format(name, version)
+
+def convert_not_equal(name, operator, version_id):
+    if version_id.endswith('.*'):
+        version_id = version_id[:-2]
+        version = RpmVersion(version_id)
+        if version.is_legacy():
+            # LegacyVersions are not supported in this context
+            return 'Invalid version'
+        version_gt = RpmVersion(version_id).increment()
+        version_gt_operator = '>='
+        # Prevent dev and pre-releases from satisfying a < requirement
+        version = '{}~~'.format(version)
+    else:
+        version = RpmVersion(version_id)
+        version_gt = version
+        version_gt_operator = '>'
+    return '({} < {} or {} {} {})'.format(
+        name, version, name, version_gt_operator, version_gt)
+
+def convert_ordered(name, operator, version_id):
+    if version_id.endswith('.*'):
+        # PEP 440 does not define semantics for prefix matching
+        # with ordered comparisons
+        # see: https://github.com/pypa/packaging/issues/320
+        # and: https://github.com/pypa/packaging/issues/321
+        # This style of specifier is officially "unsupported",
+        # even though it is processed.  Support may be removed
+        # in version 21.0.
+        version_id = version_id[:-2]
+        version = RpmVersion(version_id)
+        if operator == '>':
+            # distutils will allow a prefix match with '>'
+            operator = '>='
+        if operator == '<=':
+            # distutils will not allow a prefix match with '<='
+            operator = '<'
+    else:
+        version = RpmVersion(version_id)
+    # For backwards compatibility, fallback to previous behavior with LegacyVersions
+    if not version.is_legacy():
+        # Prevent dev and pre-releases from satisfying a < requirement
+        if operator == '<' and not version.pre and not version.dev and not version.post:
+            version = '{}~~'.format(version)
+        # Prevent post-releases from satisfying a > requirement
+        if operator == '>' and not version.pre and not version.dev and not version.post:
+            version = '{}.0'.format(version)
+    return '{} {} {}'.format(name, operator, version)
+
+OPERATORS = {'~=': convert_compatible,
+             '==': convert_equal,
+             '===': convert_arbitrary_equal,
+             '!=': convert_not_equal,
+             '<=': convert_ordered,
+             '<':  convert_ordered,
+             '>=': convert_ordered,
+             '>':  convert_ordered}
+
+def convert(name, operator, version_id):
+    return OPERATORS[operator](name, operator, version_id)
+
+def convert_requirement(req):
+    parsed_req = Requirement.parse(req)
+    reqs = []
+    for spec in parsed_req.specs:
+        reqs.append(convert(parsed_req.project_name, spec[0], spec[1]))
+    if len(reqs) == 0:
+        return parsed_req.project_name
+    if len(reqs) == 1:
+        return reqs[0]
+    else:
+        reqs.sort()
+        return '({})'.format(' with '.join(reqs))