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Improve disk space estimation messages in backup

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Add compressed size estimation and better error handling:
- Show both uncompressed (for safety) and estimated compressed size
- Handle calculation failure gracefully with clear message
- Estimate compression ratio at ~90% (divide by 10)
- Add conditional check to prevent arithmetic errors

Example output:
- Espace requis (non compressé + 20%): 1.7GiB
- Espace estimé après compression: 170MiB
- Archive finale: 55MiB (actual result)

This helps users understand why the required space seems larger
than the final backup size (compression factor).

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>
This commit is contained in:
BeauTroll
2025-12-17 19:43:04 +01:00
parent 2ed5314537
commit fb2a3585d4
1 changed files with 8 additions and 1 deletions
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9
scripts/backup.sh
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@@ -106,7 +106,14 @@ if [ -z "$AVAILABLE_SPACE" ]; then
exit 1 exit 1
fi fi
log "INFO" "Espace requis (estimé): $(numfmt --to=iec-i --suffix=B "$REQUIRED_SPACE" 2>/dev/null || echo "$REQUIRED_SPACE bytes")" # Calculer estimation avec compression (ratio moyen ~90%)
if [ "$REQUIRED_SPACE" -gt 0 ] 2>/dev/null; then
ESTIMATED_COMPRESSED=$((REQUIRED_SPACE / 10))
log "INFO" "Espace requis (non compressé + 20%): $(numfmt --to=iec-i --suffix=B "$REQUIRED_SPACE" 2>/dev/null || echo "$REQUIRED_SPACE bytes")"
log "INFO" "Espace estimé après compression: $(numfmt --to=iec-i --suffix=B "$ESTIMATED_COMPRESSED" 2>/dev/null || echo "$ESTIMATED_COMPRESSED bytes")"
else
log "INFO" "Espace requis: Impossible à calculer (utilisation du fallback)"
fi
log "INFO" "Espace disponible: $(numfmt --to=iec-i --suffix=B "$AVAILABLE_SPACE" 2>/dev/null || echo "$AVAILABLE_SPACE bytes")" log "INFO" "Espace disponible: $(numfmt --to=iec-i --suffix=B "$AVAILABLE_SPACE" 2>/dev/null || echo "$AVAILABLE_SPACE bytes")"
# Comparaison sécurisée avec validation # Comparaison sécurisée avec validation