Add one-command server mod updates: build_mods.py --push via update.sh (stop/sync/start, prunes stale jars)

server/build_mods.py

@@ -8,13 +8,17 @@ For every .jar in the pack instance it:
   - drops the 19 client-only mods
 and writes the server manifest to mods.json.
 
-Usage:  python3 build_mods.py
+Usage:  python3 build_mods.py           regenerate server/mods.json
+        python3 build_mods.py --push    regenerate, then update the live server
+                                        (stop -> sync mods -> start, via SSH)
 """
-import hashlib, json, os, subprocess, sys, time
+import argparse, hashlib, json, os, subprocess, sys, time
 
 INSTANCE = os.path.expanduser(
     "~/.local/share/PrismLauncher/instances/Reaper's Sky - dev/.minecraft/mods")
 OUT = os.path.join(os.path.dirname(os.path.abspath(__file__)), "mods.json")
+UPDATE_SH = os.path.join(os.path.dirname(os.path.abspath(__file__)), "update.sh")
+SERVER_HOST = os.environ.get("RS_SERVER_HOST", "root@ReapersSky")
 MC_VERSION = "1.21.1"
 NEOFORGE_VERSION = "21.1.248"
 
@@ -67,7 +71,25 @@ def resolve(jar, digest):
         return ""
 
 
+def push():
+    """Upload mods.json to the server and run update.sh there (stop/sync/start)."""
+    print(f"Uploading manifest to {SERVER_HOST}:/tmp/reaper-sky-mods.json ...")
+    with open(OUT, "rb") as f:
+        subprocess.run(["ssh", SERVER_HOST, "cat > /tmp/reaper-sky-mods.json"],
+                       stdin=f, check=True)
+    print("Running update.sh on the server (stop -> sync -> start) ...")
+    with open(UPDATE_SH, "rb") as f:
+        subprocess.run(["ssh", SERVER_HOST, "bash -s -- /tmp/reaper-sky-mods.json"],
+                       stdin=f, check=True)
+
+
 def main():
+    parser = argparse.ArgumentParser(description=__doc__.splitlines()[0])
+    parser.add_argument("--push", action="store_true",
+                        help="also update the live server: stop it, sync mods "
+                             "(prune + download + sha1-verify), start it again")
+    args = parser.parse_args()
+
     mods = []
     for jar in sorted(os.listdir(INSTANCE)):
         if not jar.endswith(".jar"):
@@ -85,6 +107,8 @@ def main():
     with open(OUT, "w") as f:
         json.dump(manifest, f, indent=2)
     print(f"Wrote {len(mods)} server mods to {OUT}")
+    if args.push:
+        push()
 
 
 if __name__ == "__main__":