scripts: Add steamcmd download script

scripts/import_sega_classics.py

+#!/usr/bin/env python
+import getpass
+import io
+import os
+import requests
+import retro.data
+import subprocess
+import sys
+import tarfile
+import tempfile
+
+
+username = input('Username: ')
+password = getpass.getpass('Password (leave blank if cached): ')
+
+if password:
+    password = password + '\n'
+
+    authcode = input('Steam Guard code (leave blank if unknown): ')
+    if authcode:
+        password = password + authcode + '\n'
+
+with tempfile.TemporaryDirectory() as dir:
+    if sys.platform.startswith('linux'):
+        r = requests.get('https://steamcdn-a.akamaihd.net/client/installer/steamcmd_linux.tar.gz')
+    elif sys.platform.startswith('darwin'):
+        r = requests.get('https://steamcdn-a.akamaihd.net/client/installer/steamcmd_osx.tar.gz')
+    else:
+        raise RuntimeError('Unknown platform %s' % sys.platform)
+    tarball = tarfile.open(fileobj=io.BytesIO(r.content))
+    tarball.extractall(dir)
+
+    command = ['%s/steamcmd.sh' % dir,
+        '+login', username,
+        '+force_install_dir', dir,
+        '+@sSteamCmdForcePlatformType', 'windows',
+        '+app_update', '34270', 'validate',
+        '+quit']
+
+    print('Downloading ROMs...')
+    subprocess.run(command, check=True, input=password.encode('utf-8'), stdout=subprocess.DEVNULL)
+    romdir = os.path.join(dir, 'uncompressed ROMs')
+    roms = [os.path.join(romdir, rom) for rom in os.listdir(romdir)]
+    retro.data.merge(*roms, quiet=False)