Spawn borg and pass input

backup.py

@@ -235,22 +235,30 @@ def main(argv: list[str]):
         with open(os.devnull, "wb") as out:
             backup.run(out)
     else:
-#        subprocess.Popen([args.borg,
-#                          "create",
-#                          "--verbose",
-#                          "--list",
-#                          "--filter", "E",
-#                          "--stats",
-#                          "--exclude-caches"])
-#        --stats \
-#        --exclude-caches \
-#        --one-file-system \
-#        --checkpoint-interval 900 \
-#        --compression zstd,3 \
-#        ::'{hostname}-{now:%Y%m%d-%H%M%S}' \
-#        $BORG_BACKUP_DIRS
-        backup.run(sys.stdout.buffer)
+        borg = subprocess.Popen([args.borg,
+                                 "create",
+                                 "--verbose",
+                                 "--list",
+                                 "--filter", "E",
+                                 "--stats",
+                                 "--checkpoint-interval", "900",
+                                 "--compression", "zstd,3",
+                                 "--paths-from-stdin",
+                                 "--paths-delimiter", "\\0",
+                                 "::'{hostname}-{now:%Y%m%d-%H%M%S}'"],
+                                stdin=subprocess.PIPE)
+        backup.run(borg.stdin)
+        borg.stdin.close()
+        ret = borg.wait()
+        if ret < 0:
+            sys.stderr.write(f"error: process exited with signal {-ret}\n")
+            return 1
+        elif ret != 0:
+            sys.stderr.write(f"error: process exited with return code {ret}\n")
+            return ret
+
+    return 0
 
 if __name__ == "__main__":
     import sys
-    main(sys.argv)
+    raise SystemExit(main(sys.argv))