init

get_server.py

@@ -0,0 +1,42 @@
+import requests
+import json
+import os
+
+LATEST = "latest"
+RELEASE = "release"
+SNAPSHOT = "snapshot"
+REQUESTED_VERSION = os.getenv("SERVER_VERSION", LATEST)
+VERSION_FILE = "SERVER_VERSION"
+
+def get_latest_version(latest):
+    return latest.get(RELEASE)
+
+def get_version(versions, latest, id):
+    if id == LATEST:
+        id = get_latest_version(latest)
+
+    result = list(filter(
+        lambda item: item.get('id') == id,
+        versions
+    ))
+    if len(result) == 1:
+        return result[0]
+    elif len(result) > 1:
+        raise ValueError(f"Version {id} didn't return 1 result, it returned {len(result)}!")
+    else:
+        raise ValueError(f"Version {id} had no matches.")
+
+def write_version_file(version):
+    with open(VERSION_FILE, "w") as f:
+        return f.write(version.get('url'))
+
+if __name__ == "__main__":
+    version_manifest = requests.get("https://launchermeta.mojang.com/mc/game/version_manifest_v2.json")
+    version_json = json.loads(version_manifest.text)
+    versions = version_json.get('versions')
+    latest = version_json.get(LATEST)
+
+    print(f"Attempting to get version {REQUESTED_VERSION}.")
+    version = get_version(versions, latest, REQUESTED_VERSION)
+    print(f"Found, writing url to VERSION file.")
+    write_version_file(version)