packages/flavour: implement flavourinfo.json parsing

constants.py

@@ -200,3 +200,5 @@ MAKEPKG_CMD = [
 
 SRCINFO_FILE = 'SRCINFO'
 SRCINFO_METADATA_FILE = 'srcinfo_meta.json'
+
+FLAVOUR_INFO_FILE = 'flavourinfo.json'

packages/flavour.py

@@ -1,23 +1,35 @@
 from __future__ import annotations
 
 import click
+import json
 import logging
+import os
 
 from dataclasses import dataclass
 from typing import Optional
 
 from config import config
+from constants import FLAVOUR_INFO_FILE
 
 from .pkgbuild import discover_pkgbuilds, get_pkgbuild_by_name, init_pkgbuilds, Pkgbuild
 
 profile_option = click.option('-p', '--profile', help="name of the profile to use", required=False, default=None)
 
 
+@dataclass
+class FlavourInfo:
+    rootfs_size: int  # rootfs size in GB
+
+    def __repr__(self):
+        return f'rootfs_size: {self.rootfs_size}'
+
+
 @dataclass
 class Flavour:
     name: str
     pkgbuild: Pkgbuild
     description: str
+    flavour_info: Optional[FlavourInfo]
 
     @staticmethod
     def from_pkgbuild(pkgbuild: Pkgbuild) -> Flavour:
@@ -27,10 +39,25 @@ class Flavour:
         if name.endswith('-common'):
             raise Exception(f'Flavour package "{name}" ends with "-common": "{name}"')
         name = name[8:]  # split off 'flavour-'
-        return Flavour(name=name, pkgbuild=pkgbuild, description=pkgbuild.description)
+        return Flavour(name=name, pkgbuild=pkgbuild, description=pkgbuild.description, flavour_info=None)
 
     def __repr__(self):
-        return f'Flavour "{self.name}": "{self.description}", package: {self.pkgbuild.name if self.pkgbuild else "??? PROBABLY A BUG!"}'
+        return f'Flavour "{self.name}": "{self.description}", package: {self.pkgbuild.name if self.pkgbuild else "??? PROBABLY A BUG!"}{f", {self.flavour_info}" if self.flavour_info else ""}'
+
+    def parse_flavourinfo(self, lazy: bool = True):
+        if lazy and self.flavour_info is not None:
+            return self.flavour_info
+        infopath = os.path.join(config.get_path('pkgbuilds'), self.pkgbuild.path, FLAVOUR_INFO_FILE)
+        if not os.path.exists(infopath):
+            raise Exception(f"Error parsing flavour info for flavour {self.name}: file doesn't exist: {infopath}")
+        try:
+            with open(infopath, 'r') as fd:
+                infodict = json.load(fd)
+            i = FlavourInfo(**infodict)
+        except Exception as ex:
+            raise Exception(f"Error parsing {FLAVOUR_INFO_FILE} for flavour {self.name}: {ex}")
+        self.flavour_info = i
+        return i
 
 
 _flavours_discovered: bool = False