109 lines
3.6 KiB
Bash
109 lines
3.6 KiB
Bash
#!/bin/bash
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#-----------------------------------------------------------------------------------------------
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# --------------------- Common Shared Functions for Unraid Scripts -----------------------------
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#-----------------------------------------------------------------------------------------------
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# This file contains ONLY reusable logic.
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# No code should execute on load — only functions.
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# All user configuration lives in Master.conf
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#-----------------------------------------------------------------------------------------------
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#-----------------------------------------------------------------------------------------------
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# Load Master.conf
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#-----------------------------------------------------------------------------------------------
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#-----------------------------------------------------------------------------------------------
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# Load Master.conf reliably
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#-----------------------------------------------------------------------------------------------
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# Load Master.conf
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load_master_conf() {
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local script_dir
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script_dir="$(cd "$(dirname "${BASH_SOURCE[1]}")" && pwd)"
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local master_conf="$script_dir/Master.conf"
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if [[ -f "$master_conf" ]]; then
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source "$master_conf"
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echo "Loaded Master.conf from $master_conf"
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else
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echo "Error: Master.conf not found at $master_conf"
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exit 1
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fi
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}
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# Parse CLI arguments (flags + VAR=value overrides)
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parse_args() {
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DRY_RUN=${DRY_RUN:-false}
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for ARG in "$@"; do
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if [[ "$ARG" == *=* ]]; then
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local VAR_NAME="${ARG%%=*}"
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local VAR_VALUE="${ARG#*=}"
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if declare -p "$VAR_NAME" &>/dev/null; then
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printf -v "$VAR_NAME" '%s' "$VAR_VALUE"
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echo "Overriding $VAR_NAME -> $VAR_VALUE"
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else
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echo "Warning: Unknown variable $VAR_NAME, ignoring."
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fi
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else
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case "$ARG" in
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--dry-run|-n) DRY_RUN=true ;;
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--help|-h)
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echo "Usage: script [--dry-run|-n] [VAR=value ...]"
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exit 0 ;;
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*) echo "Warning: Unknown argument $ARG" ;;
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esac
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fi
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done
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}
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# Validate integer
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validate_int() {
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local name="$1"
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local value="$2"
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if ! [[ "${value:-}" =~ ^[0-9]+$ ]]; then
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echo "Error: $name must be a non-negative integer."
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exit 1
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fi
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}
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# Require variable to be set
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require_var() {
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local var="$1"
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if [[ -z "${!var:-}" ]]; then
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echo "Error: Required variable $var is not set."
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exit 1
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fi
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}
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# Detect local/remote host and SSH key
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detect_hosts() {
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LOCAL_HOSTNAME="$(hostname)"
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if [[ "$LOCAL_HOSTNAME" == "$HOST1" ]]; then
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LOCAL_SERVER_NAME="$HOST1"
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REMOTE_SERVER_NAME="$HOST2"
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elif [[ "$LOCAL_HOSTNAME" == "$HOST2" ]]; then
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LOCAL_SERVER_NAME="$HOST2"
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REMOTE_SERVER_NAME="$HOST1"
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else
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echo "Error: Local hostname ($LOCAL_HOSTNAME) not recognized."
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exit 1
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fi
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echo "Local server: $LOCAL_SERVER_NAME"
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echo "Remote server: $REMOTE_SERVER_NAME"
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# Resolve Tailscale IP
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REMOTE_SERVER=$(tailscale ip -4 "$REMOTE_SERVER_NAME" 2>/dev/null)
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if [[ -z "$REMOTE_SERVER" ]]; then
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echo "Error: Could not resolve Tailscale IP for $REMOTE_SERVER_NAME"
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exit 1
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fi
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echo "Resolved $REMOTE_SERVER_NAME → $REMOTE_SERVER"
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# SSH key lookup
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KEY_ID="$LOCAL_SERVER_NAME|$REMOTE_SERVER_NAME"
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if [[ -n "${SSH_KEYS[$KEY_ID]}" ]]; then
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SSH_KEY="${SSH_KEYS[$KEY_ID]}"
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else
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echo "Error: No SSH key defined for $LOCAL_SERVER_NAME → $REMOTE_SERVER_NAME"
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exit 1
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fi
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echo "Using SSH key: $SSH_KEY"
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} |