distro: refactor Repo- and PackageInfo into separate files

distro/package.py

@@ -0,0 +1,29 @@
+class PackageInfo:
+    name: str
+    version: str
+    filename: str
+    resolved_url: str
+
+    def __init__(
+        self,
+        name: str,
+        version: str,
+        filename: str,
+        resolved_url: str = None,
+    ):
+        self.name = name
+        self.version = version
+        self.filename = filename
+        self.resolved_url = resolved_url
+
+    def __repr__(self):
+        return f'{self.name}@{self.version}'
+
+    def parse_desc(desc_str: str, resolved_url=None):
+        """Parses a desc file, returning a PackageInfo"""
+
+        pruned_lines = ([line.strip() for line in desc_str.split('%') if line.strip()])
+        desc = {}
+        for key, value in zip(pruned_lines[0::2], pruned_lines[1::2]):
+            desc[key.strip()] = value.strip()
+        return PackageInfo(desc['NAME'], desc['VERSION'], desc['FILENAME'], resolved_url=resolved_url)