Start decoder TV channels with one click in Jellyfin Web

install-web-playback.py

@@ -0,0 +1,27 @@
+"""Run in CT100191 after staging decoder-channel-playback.js in /tmp. No restart needed."""
+import datetime
+import json
+import pathlib
+import shutil
+
+web = pathlib.Path('/usr/share/jellyfin/web')
+backup = pathlib.Path('/var/lib/jellyfin/decoder-plugin-backups') / ('web-playback-' + datetime.datetime.now(datetime.timezone.utc).strftime('%Y%m%dT%H%M%SZ'))
+backup.mkdir(mode=0o700)
+for name in ['index.html', 'config.json']:
+    shutil.copy2(web / name, backup / name)
+script = web / 'decoder-channel-playback.js'
+if script.exists():
+    shutil.copy2(script, backup / script.name)
+shutil.copy2('/tmp/decoder-channel-playback.js', script)
+html = (web / 'index.html').read_text()
+tag = '<script defer="defer" src="decoder-channel-playback.js"></script>'
+if tag not in html:
+    html = html.replace('<head>', '<head>' + tag, 1)
+    assert tag in html
+    (web / 'index.html').write_text(html)
+config = json.loads((web / 'config.json').read_text())
+plugins = config.setdefault('plugins', [])
+if 'DecoderChannelPlayback' not in plugins:
+    plugins.append('DecoderChannelPlayback')
+(web / 'config.json').write_text(json.dumps(config, indent=2) + '\n')
+print(json.dumps({'web_playback_installed': True, 'backup': str(backup)}))