Adds update script

bookwyrm/management/commands/instance_version.py

@@ -0,0 +1,54 @@
+""" Get your admin code to allow install """
+from django.core.management.base import BaseCommand
+
+from bookwyrm import models
+from bookwyrm.settings import VERSION
+
+
+# pylint: disable=no-self-use
+class Command(BaseCommand):
+    """command-line options"""
+
+    help = "What version is this?"
+
+    def add_arguments(self, parser):
+        """specify which function to run"""
+        parser.add_argument(
+            "--current",
+            action="store_true",
+            help="Version stored in database",
+        )
+        parser.add_argument(
+            "--target",
+            action="store_true",
+            help="Version stored in settings",
+        )
+        parser.add_argument(
+            "--update",
+            action="store_true",
+            help="Update database version",
+        )
+
+    # pylint: disable=unused-argument
+    def handle(self, *args, **options):
+        """execute init"""
+        site = models.SiteSettings.objects.get()
+        current = site.version or "0.0.1"
+        target = VERSION
+        if options.get("current"):
+            print(current)
+            return
+
+        if options.get("target"):
+            print(target)
+            return
+
+        if options.get("update"):
+            site.version = target
+            site.save()
+            return
+
+        if current != target:
+            print(f"{current}/{target}")
+        else:
+            print(current)