add Version class

source/version.py

@@ -0,0 +1,39 @@
+from dataclasses import dataclass
+
+
+@ dataclass(slots = True)
+class Version:
+  '''A lightweight representation of a 3-value version number.'''
+
+  root: int = 1
+  major: int = 0
+  minor: int = 0
+  dev: str = ""
+
+  def __post_init__(self):
+    if isinstance(self.root, str):
+      parts = self.root.split(".")
+
+      self.root = int(parts.pop(0))
+      if parts:
+        self.major = int(parts.pop(0))
+      if parts:
+        self.minor = int(parts.pop(0))
+      if parts:
+        self.dev = ".".join(parts)
+
+  def update(self, part: str) -> Version:
+    '''Increment the version.'''
+
+    match part:
+      case "root":
+        self.root += 1
+        self.major = 0
+        self.minor = 0
+
+      case "major":
+        self.major += 1
+        self.minor = 0
+
+      case "minor":
+        self.minor += 1