Add support for cargo version range

Signed-off-by: ziad <ziadhany2016@gmail.com>

Author: ziadhany

.travis.yml

@@ -16,7 +16,9 @@ python:
   - "3.9"
 
 # Scripts to run at install stage
-install: ./configure --dev
+install: |
+  ./configure --dev
+  source venv/bin/activate
 
 # Scripts to run at script stage
-script: venv/bin/pytest
+script: pytest

azure-pipelines.yml

@@ -13,44 +13,56 @@ jobs:
           image_name: ubuntu-18.04
           python_versions: ['3.6', '3.7', '3.8', '3.9', '3.10']
           test_suites:
-              all: venv/bin/pytest -n 2 -vvs
+              all: |
+                source venv/bin/activate
+                pytest -n 2 -vvs
 
     - template: etc/ci/azure-posix.yml
       parameters:
           job_name: ubuntu20_cpython
           image_name: ubuntu-20.04
           python_versions: ['3.6', '3.7', '3.8', '3.9', '3.10']
           test_suites:
-              all: venv/bin/pytest -n 2 -vvs
+              all: |
+                source venv/bin/activate
+                pytest -n 2 -vvs
 
     - template: etc/ci/azure-posix.yml
       parameters:
           job_name: macos1015_cpython
           image_name: macos-10.15
           python_versions: ['3.6', '3.7', '3.8', '3.9', '3.10']
           test_suites:
-              all: venv/bin/pytest -n 2 -vvs
+              all: |
+                source venv/bin/activate
+                pytest -n 2 -vvs
 
     - template: etc/ci/azure-posix.yml
       parameters:
           job_name: macos11_cpython
           image_name: macos-11
           python_versions: ['3.7', '3.8', '3.9', '3.10']
           test_suites:
-              all: venv/bin/pytest -n 2 -vvs
+              all: |
+                source venv/bin/activate
+                pytest -n 2 -vvs
 
     - template: etc/ci/azure-win.yml
       parameters:
           job_name: win2019_cpython
           image_name: windows-2019
           python_versions: ['3.6', '3.7', '3.8', '3.9', '3.10']
           test_suites:
-              all: venv\Scripts\pytest -n 2 -vvs
+              all: |
+                call venv\Scripts\activate.bat
+                pytest -n 2 -vvs
 
     - template: etc/ci/azure-win.yml
       parameters:
           job_name: win2022_cpython
           image_name: windows-2022
           python_versions: ['3.7', '3.8', '3.9', '3.10']
           test_suites:
-              all: venv\Scripts\pytest -n 2 -vvs
+              all: |
+                call venv\Scripts\activate.bat
+                pytest -n 2 -vvs

src/univers/version_range.py

@@ -233,7 +233,8 @@ class NpmVersionRange(VersionRange):
         ">=": ">=",
         "<": "<",
         ">": ">",
-        "=": "=",  # This is not a native node-semver comparator, but is used in the gitlab version range for npm packages.
+        "=": "=",
+        # This is not a native node-semver comparator, but is used in the gitlab version range for npm packages.
     }
 
     @classmethod
@@ -672,7 +673,8 @@ class ComposerVersionRange(VersionRange):
         ">=": ">=",
         "<": "<",
         ">": ">",
-        "=": "=",  # This is not a native composer-semver comparator, but is used in the gitlab version range for composer packages.
+        "=": "=",
+        # This is not a native composer-semver comparator, but is used in the gitlab version range for composer packages.
     }
 
 
@@ -774,7 +776,8 @@ class GolangVersionRange(VersionRange):
         ">=": ">=",
         "<": "<",
         ">": ">",
-        "=": "=",  # This is not a native golang-semver comparator, but is used in the gitlab version range for go packages.
+        "=": "=",
+        # This is not a native golang-semver comparator, but is used in the gitlab version range for go packages.
     }
 
 
@@ -798,6 +801,48 @@ class HexVersionRange(VersionRange):
 class CargoVersionRange(VersionRange):
     scheme = "cargo"
     version_class = versions.SemverVersion
+    vers_by_native_comparators = {
+        "==": "=",  # not sure for this
+        "<=": "<=",
+        ">=": ">=",
+        "<": "<",
+        ">": ">",
+    }
+
+    @classmethod
+    def from_native(cls, string):
+        """
+        Return a VersionRange built from an "cargo-semver" range ``string``.
+        >>> from univers.versions import SemverVersion
+        >>> constraints = [
+        ...    VersionConstraint(comparator=">=", version=SemverVersion('0.3.2')),
+        ... ]
+        >>> assert CargoVersionRange(constraints=constraints) == CargoVersionRange.from_native(">= 0.3.2")
+        """
+        try:
+            specifiers = SpecifierSet(string)
+        except InvalidSpecifier as e:
+            raise InvalidVersionRange() from e
+
+        constraints = []
+        unsupported_messages = []
+        for spec in specifiers:
+            operator = spec.operator
+            version = spec.version
+
+            try:
+                version = cls.version_class(version)
+                comparator = cls.vers_by_native_comparators[operator]
+                constraint = VersionConstraint(comparator=comparator, version=version)
+                constraints.append(constraint)
+            except:
+                msg = f"Invalid Semver version: {spec!r}"
+                unsupported_messages.append(msg)
+
+        if unsupported_messages:
+            raise InvalidVersionRange(*unsupported_messages)
+
+        return cls(constraints=constraints)
 
 
 class MozillaVersionRange(VersionRange):

tests/test_codestyle.py

@@ -10,7 +10,7 @@
 
 class BaseTests(unittest.TestCase):
     def test_codestyle(self):
-        args = "venv/bin/black --check -l 100 setup.py src tests"
+        args = "black --check -l 100 setup.py src tests"
         try:
             subprocess.check_output(args.split())
         except subprocess.CalledProcessError as e:

tests/test_skeleton_codestyle.py

@@ -22,7 +22,7 @@ def test_skeleton_codestyle(self):
         if setup_cfg["metadata"]["name"] != "skeleton":
             return
 
-        args = "venv/bin/black --check -l 100 setup.py etc tests"
+        args = "black --check -l 100 setup.py etc tests"
         try:
             subprocess.check_output(args.split())
         except subprocess.CalledProcessError as e: