banger/rm.sh

81 lines
1.9 KiB
Bash
Executable file

#!/usr/bin/env bash
set -euo pipefail
log() {
printf '[rm] %s\n' "$*"
}
usage() {
cat <<'EOF'
Usage: ./rm.sh <id-or-name-prefix>
Removes VM artifacts from state/ and cleans up TAP and mapped devices.
EOF
}
find_vm_json() {
local query="$1"
local vm_json match_count=0 match=""
for vm_json in state/vms/*/vm.json; do
[[ -f "$vm_json" ]] || continue
local id name
id="$(jq -r '.meta.id // empty' "$vm_json")"
name="$(jq -r '.meta.name // empty' "$vm_json")"
if [[ "$id" == "$query"* || "$name" == "$query"* ]]; then
match="$vm_json"
match_count=$((match_count + 1))
fi
done
if (( match_count == 0 )); then
log "no VM found for prefix: $query"
exit 1
fi
if (( match_count > 1 )); then
log "multiple VMs found for prefix: $query"
exit 1
fi
printf '%s' "$match"
}
QUERY="${1:-}"
if [[ -z "$QUERY" || "$QUERY" == "-h" || "$QUERY" == "--help" ]]; then
usage
exit 1
fi
VM_JSON="$(find_vm_json "$QUERY")"
VM_DIR="$(dirname "$VM_JSON")"
PID="$(jq -r '.meta.pid // empty' "$VM_JSON")"
TAP="$(jq -r '.meta.tap // empty' "$VM_JSON")"
API_SOCK="$(jq -r '.meta.api_sock // empty' "$VM_JSON")"
BASE_LOOP="$(jq -r '.meta.base_loop // empty' "$VM_JSON")"
COW_LOOP="$(jq -r '.meta.cow_loop // empty' "$VM_JSON")"
DM_DEV="$(jq -r '.meta.dm_dev // empty' "$VM_JSON")"
DM_NAME="$(jq -r '.meta.dm_name // empty' "$VM_JSON")"
if [[ -n "$PID" ]]; then
sudo kill "$PID" 2>/dev/null || true
fi
if [[ -n "$TAP" ]]; then
sudo ip link del "$TAP" 2>/dev/null || true
fi
if [[ -n "$API_SOCK" ]]; then
rm -f "$API_SOCK"
fi
if [[ -n "$DM_DEV" || -n "$DM_NAME" ]]; then
sudo dmsetup remove "${DM_NAME:-$DM_DEV}" 2>/dev/null || true
fi
if [[ -n "$COW_LOOP" ]]; then
sudo losetup -d "$COW_LOOP" 2>/dev/null || true
fi
if [[ -n "$BASE_LOOP" ]]; then
sudo losetup -d "$BASE_LOOP" 2>/dev/null || true
fi
if [[ -d "$VM_DIR" ]]; then
rm -rf "$VM_DIR"
fi
log "removed $VM_DIR"