Add diff method to AwesomeVersion to list out changes between 2 objec…

…ts (#185)

* Add diff method to AwesomeVersion to list out changes between 2 objects

* Make it an object

* lint

* Add substraction

awesomeversion/__init__.py

@@ -1,5 +1,5 @@
 """Initialize the AwesomeVersion package."""
-from .awesomeversion import AwesomeVersion
+from .awesomeversion import AwesomeVersion, AwesomeVersionDiff
 from .exceptions import (
     AwesomeVersionCompareException,
     AwesomeVersionException,
@@ -10,6 +10,7 @@
 __all__ = [
     "AwesomeVersion",
     "AwesomeVersionCompareException",
+    "AwesomeVersionDiff",
     "AwesomeVersionException",
     "AwesomeVersionStrategy",
     "AwesomeVersionStrategyException",

awesomeversion/awesomeversion.py

@@ -1,7 +1,7 @@
 """AwesomeVersion."""
 from __future__ import annotations
 
-from typing import Any
+from typing import TYPE_CHECKING, Any, Dict
 from warnings import warn
 
 from .comparehandlers.container import compare_handler_container
@@ -15,7 +15,6 @@
     AwesomeVersionStrategy,
     AwesomeVersionStrategyDescription,
 )
-from .typing import EnsureStrategyIterableType, EnsureStrategyType, VersionType
 from .utils.regex import (
     RE_DIGIT,
     RE_MODIFIER,
@@ -24,6 +23,9 @@
     generate_full_string_regex,
 )
 
+if TYPE_CHECKING:
+    from .typing import EnsureStrategyIterableType, EnsureStrategyType, VersionType
+
 
 class _AwesomeVersionBase(str):
     """Base class for AwesomeVersion to allow the usage of the default JSON encoder."""
@@ -202,6 +204,25 @@ def __le__(self, compareto: object) -> bool:
     def __ge__(self, compareto: object) -> bool:
         return self.__eq__(compareto) or self.__gt__(compareto)
 
+    def __sub__(self, compareto: object) -> AwesomeVersionDiff:
+        return self.diff(compareto)
+
+    def diff(self, compareto: VersionType) -> AwesomeVersionDiff:
+        """Return a dictionary with differences between 2 AwesomeVersion objects."""
+        if isinstance(compareto, (str, float, int)):
+            compareto = AwesomeVersion(compareto)
+        if not isinstance(compareto, AwesomeVersion):
+            raise AwesomeVersionCompareException("Not a valid AwesomeVersion object")
+        return AwesomeVersionDiff(
+            {
+                "major": self.major != compareto.major,
+                "minor": self.minor != compareto.minor,
+                "patch": self.patch != compareto.patch,
+                "modifier": self.modifier != compareto.modifier,
+                "strategy": self.strategy != compareto.strategy,
+            }
+        )
+
     def section(self, idx: int) -> int:
         """Return the value of the specified section of the version."""
         if self.sections >= (idx + 1):
@@ -430,3 +451,42 @@ def simple(self) -> bool:
                 generate_full_string_regex(RE_SIMPLE).match(self.string) is not None
             )
         return self._simple
+
+
+class AwesomeVersionDiff:
+    """Structured output of AwesomeVersion.diff"""
+
+    def __init__(self, changes: Dict[str, bool]) -> None:
+        """Initialize the AwesomeVersionDiff."""
+        self._changes = changes
+
+    def __repr__(self) -> str:
+        return (
+            f"AwesomeVersionDiff(major={self.major}, minor={self.minor}, "
+            f"patch={self.patch}, modifier={self.modifier}, strategy={self.strategy})"
+        )
+
+    @property
+    def major(self) -> bool:
+        """Return True if the major version has changed."""
+        return self._changes["major"]
+
+    @property
+    def minor(self) -> bool:
+        """Return True if the minor version has changed."""
+        return self._changes["minor"]
+
+    @property
+    def patch(self) -> bool:
+        """Return True if the patch version has changed."""
+        return self._changes["patch"]
+
+    @property
+    def modifier(self) -> bool:
+        """Return True if the modifier version has changed."""
+        return self._changes["modifier"]
+
+    @property
+    def strategy(self) -> bool:
+        """Return True if the strategy has changed."""
+        return self._changes["strategy"]

tests/test_awesomeversion.py

@@ -9,6 +9,7 @@
     AwesomeVersionStrategy,
     AwesomeVersionStrategyException,
 )
+from awesomeversion.exceptions import AwesomeVersionException
 from awesomeversion.strategy import COMPARABLE_STRATEGIES
 from awesomeversion.typing import VersionType
 
@@ -222,3 +223,26 @@ def test_find_first_match_exception() -> None:
         assert "Can not use find_first_match without ensure_strategy" in str(
             warning_list[-1].message
         )
+
+
+def test_diff() -> None:
+    """Test .diff"""
+    version = AwesomeVersion("2020.12.1")
+
+    assert version.diff("2021.12.1").major
+    assert not version.diff("2021.12.1").minor
+    assert not version.diff("2021.12.1").patch
+    assert not version.diff("2021.12.1").modifier
+    assert not version.diff("2021.12.1").strategy
+
+    assert version.diff("2021.11.1").minor
+    assert version.diff("2021.12.2").patch
+    assert version.diff("2021.12.1dev2").modifier
+    assert version.diff("2.11.1").strategy
+
+    diff = version - "2021.12.1"
+    assert diff.major
+    assert diff.__repr__().startswith("AwesomeVersionDiff(")
+
+    with pytest.raises(AwesomeVersionException):
+        version.diff(None)