Add version command line

game_backuper/main.py

@@ -1,5 +1,5 @@
 from game_backuper.config import Config
-from game_backuper.cml import Opts
+from game_backuper.cml import Opts, OptAction
 from game_backuper.db import Db
 from game_backuper.backuper import Backuper
 from os import makedirs
@@ -11,6 +11,28 @@ def main(cm=None):
         import sys
         cm = sys.argv[1:]
     cml = Opts(cm)
+    if cml.action == OptAction.VERSION:
+        from game_backuper.compress import (
+            have_brotli,
+            have_bz2,
+            have_gzip,
+            have_lzip,
+            have_lzma,
+            have_snappy,
+            have_zstd,
+        )
+        from game_backuper.leveldb import have_leveldb
+        from game_backuper.regexp import have_pcre2
+        print("Brotli support:", have_brotli)
+        print("BZip2 support:", have_bz2)
+        print("GZip support:", have_gzip)
+        print("LZip support:", have_lzip)
+        print("LZMA support:", have_lzma)
+        print("Snappy support:", have_snappy)
+        print("ZSTD support:", have_zstd)
+        print("LevelDB support:", have_leveldb)
+        print("PCRE2 support:", have_pcre2)
+        return 0
     cfg = Config(cml.config_file)
     if not exists(cfg.dest):
         makedirs(cfg.dest)