docs: make compose inventory generation deterministic

scripts/docs/generate-compose-inventory.py

@@ -1,6 +1,6 @@
 #!/usr/bin/env python3
+import hashlib
 import sys, yaml
-from datetime import datetime, timezone
 
 def md(v): return str(v).replace('|','\\|') if v is not None else ''
 
@@ -9,7 +9,9 @@ with open(inp) as f: c=yaml.safe_load(f) or {}
 svcs=c.get('services',{}) or {}
 nets=c.get('networks',{}) or {}
 vols=c.get('volumes',{}) or {}
-lines=["# Docker Compose Inventory","",f"Generated: {datetime.now(timezone.utc).strftime('%Y-%m-%dT%H:%M:%SZ')}","","## Summary","","| Item | Count |","|---|---:|",f"| Services | {len(svcs)} |",f"| Networks | {len(nets)} |",f"| Volumes | {len(vols)} |","","## Services","","| Service | Container | Image | Build | Profiles | Networks | Ports | Restart |","|---|---|---|---|---|---|---|---|"]
+raw=open(inp,'rb').read()
+fingerprint=hashlib.sha256(raw).hexdigest()[:12]
+lines=["# Docker Compose Inventory","",f"Source fingerprint: `{fingerprint}`","","## Summary","","| Item | Count |","|---|---:|",f"| Services | {len(svcs)} |",f"| Networks | {len(nets)} |",f"| Volumes | {len(vols)} |","","## Services","","| Service | Container | Image | Build | Profiles | Networks | Ports | Restart |","|---|---|---|---|---|---|---|---|"]
 for n,s in sorted(svcs.items()):
     build=s.get('build','')
     if isinstance(build,dict): build=build.get('context','')