Home Assistant Legacy Template Migration

Pure Bash script to fix all 67 template deprecation warnings by migrating from legacy platform: template syntax to modern template: syntax.

✅ No Python required - Works directly in SSH add-on!

🚀 Quick Start

cd /config
wget https://gitea.hideawaygaming.com.au/jessikitty/ha-template-migration/raw/branch/main/migrate_templates.sh
chmod +x migrate_templates.sh
bash migrate_templates.sh

Then:

ha core check    # Verify configuration
ha core restart  # Apply changes

⚠️ What This Fixes

Home Assistant 2026.6 will remove support for legacy template syntax.

Before (deprecated):

binary_sensor:
  - platform: template
    sensors:
      router_authenticated:
        friendly_name: "Router Authenticated"
        value_template: "{{ states('input_text.router_token') != '' }}"

After (modern):

template:
  - binary_sensor:
      - name: "Router Authenticated"
        state: "{{ states('input_text.router_token') != '' }}"
        unique_id: router_authenticated

📊 What It Does

✅ Pure Bash - no Python dependencies
✅ Scans all YAML files
✅ Creates timestamped backups
✅ Converts to modern syntax
✅ Updates configuration.yaml
✅ Generates restore script

🛡️ Safety Features

No Dependencies - Works in SSH add-on without Python
Automatic Backups - All files backed up before changes
Exit on Error - Stops if any step fails
Easy Restore - One command rollback
No Data Loss - Preserves all configurations

📝 Expected Output

======================================================================
Home Assistant Legacy Template Migration (Bash)
======================================================================

✓ Created backup: /config/backups/template_migration_20251223_123456

ℹ Found 67 legacy template entities:
  - 15 sensor(s)
  - 52 binary_sensor(s)

✓ MIGRATION COMPLETE
Migrated: 67 template entities

🔄 Restore if Needed

bash /config/backups/template_migration_YYYYMMDD_HHMMSS/restore.sh
ha core restart

🎯 Result

After running, all 67 repair warnings will be cleared! ✅

💡 Why Bash?

✅ Works in SSH add-on without installing packages
✅ Faster execution
✅ No dependency issues
✅ Native YAML parsing with awk

Repository: https://gitea.hideawaygaming.com.au/jessikitty/ha-template-migration

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