extract shared snapshot and archive selection logic

install.sh

@@ -20,7 +20,7 @@ function download_files() {
     shift
     curl -fsSL --output-dir "$WORK_DIR/" --remote-name "$API_ENDPOINT/raw/$path$query_params"
     rc=$?
-    if (( $rc != 0 )); then
+    if (( rc != 0 )); then
       return $rc
     fi
   done
@@ -42,7 +42,7 @@ chmod o= "$WORK_DIR/config.example"
 
 "$WORK_DIR/pbc" install
 rc=$?
-if (( $rc != 0 )); then
+if (( rc != 0 )); then
   echo "Error installing pbc requirements!" >&2
   exit $rc
 fi

pbc

@@ -1,7 +1,7 @@
 #!/usr/bin/env bash
 
 function usage() {
-  full=${1:-false}
+  local full=${1:-false}
   cat <<EOF
 Usage: $SCRIPT [-h] [-H] [-c config] command [OPTIONS]
 
@@ -80,7 +80,7 @@ function apt_get_install() {
   echo "Installing $package using package manager ..."
   DEBIAN_FRONTEND=noninteractive apt-get install -y --no-install-recommends "$package" >/dev/null
   local rc=$?
-  (( $rc != 0 )) && echo "Error installing package!" >&2
+  (( rc != 0 )) && echo "Error installing package!" >&2
   return $rc
 }
 
@@ -180,16 +180,41 @@ function may_select() {
   echo "$value"
 }
 
+function select_group() {
+  local groups
+  readarray -t groups < <(get_group_names)
+  (( ${#groups[@]} == 0 )) && return 2
+
+  PS3="Snapshot group [1-${#groups[@]}]: "
+  GROUP=$(may_select "$1" "${groups[@]}") || { echo "Error: invalid group" >&2; return 1; }
+}
+
+function select_snapshot_and_archive() {
+  local snapshots archives
+  readarray -t snapshots < <(get_snapshot_names)
+  (( ${#snapshots[@]} == 0 )) && return 2
+
+  PS3="Snapshot [1-${#snapshots[@]}]: "
+  SNAPSHOT=$(may_select "$1" "${snapshots[@]}") || { echo "Error: invalid snapshot" >&2; return 1; }
+
+  readarray -t archives < <(get_snapshot_files "$SNAPSHOT")
+  (( ${#archives[@]} == 0 )) && return 3
+
+  PS3="Archive [1-${#archives[@]}]: "
+  ARCHIVE=$(may_select "$2" "${archives[@]}") || { echo "Error: invalid archive" >&2; return 1; }
+}
+
 
 SCRIPT_PATH=$(realpath -s "$0")
-SCRIPT_DIR=$(dirname "$SCRIPT_PATH")
+SCRIPT_DIR=$(dirname "$(realpath "$0")")
 SCRIPT=$(basename "$SCRIPT_PATH")
 
 PBC=$(command -v proxmox-backup-client)
 PBC_DOWNLOAD_URL='http://download.proxmox.com/debian/pbs-client/dists/trixie/main/binary-amd64'
 ETC_DIR="/etc/$SCRIPT"
 
-FULL_HELP=false
+full_help=false
+update_pbc=false
 
 action=''
 cfgfile="$ETC_DIR/config"
@@ -210,7 +235,7 @@ while (( $# > 0 )); do
         exit 0
       ;;
       -H|--full-help)
-        FULL_HELP=true
+        full_help=true
       ;;
       -*)
         echo "Error: invalid option: $opt" >&2
@@ -225,7 +250,7 @@ while (( $# > 0 )); do
   elif [ "$action" == "install" ]; then
     case "$opt" in
       -u|--update)
-        args+=('true')
+        update_pbc=true
       ;;
       -*)
         echo "Error: invalid option: $opt" >&2
@@ -252,7 +277,7 @@ if [ -f "$cfgfile" ]; then
   (( 8#$perms & 0007 )) && echo "Warning: $cfgfile is readable by others!" >&2
 fi
 
-if $FULL_HELP; then
+if $full_help; then
   [ -f "$cfgfile" ] && source "$cfgfile"
   PBC=${PBC:-/usr/local/bin/proxmox-backup-client}
   full_usage
@@ -296,66 +321,38 @@ case "$action" in
     pbc-list "${args[@]}" || exit $?
   ;;
   snapshot-list)
-    readarray -t groups < <(get_group_names) 
-    (( ${#groups[@]} == 0 )) && echo "no snapshot groups found" && exit 0
-
-    group=${args[0]}
-    args=("${args[@]:1}")
-
-    PS3="Snapshot group [1-${#groups[@]}]: "
-    group=$(may_select "$group" "${groups[@]}")
-    (( $? != 0 )) && echo "Error: invalid group" >&2 && exit 1
+    select_group "${args[0]}"
+    case $? in
+      0) ;;
+      2) echo "no snapshot groups found"; exit 0 ;;
+      *) exit 1 ;;
+    esac
 
     echo
-    pbc-snapshot-list "$group" "${args[@]}" || exit $?
+    pbc-snapshot-list "$GROUP" "${args[@]:1}" || exit $?
   ;;
   catalog-shell)
-    readarray -t snapshots < <(get_snapshot_names)
-    (( ${#snapshots[@]} == 0 )) && echo "no snapshots found" && exit 0
-
-    snapshot=${args[0]}
-    args=("${args[@]:1}")
-
-    PS3="Snapshot [1-${#snapshots[@]}]: "
-    snapshot=$(may_select "$snapshot" "${snapshots[@]}")
-    (( $? != 0 )) && echo "Error: invalid snapshot" >&2 && exit 1
-
-    readarray -t archives < <(get_snapshot_files "$snapshot")
-    (( ${#archives[@]} == 0 )) && echo "no archives found" && exit 0
-
-    archive=${args[0]}
-    args=("${args[@]:1}")
-
-    PS3="Archive [1-${#archives[@]}]: "
-    archive=$(may_select "$archive" "${archives[@]}")
-    (( $? != 0 )) && echo "Error: invalid archive" >&2 && exit 1
+    select_snapshot_and_archive "${args[0]}" "${args[1]}"
+    case $? in
+      0) ;;
+      2) echo "no snapshots found"; exit 0 ;;
+      3) echo "no archives found"; exit 0 ;;
+      *) exit 1 ;;
+    esac
 
     echo
-    pbc-catalog-shell "$snapshot" "$archive" || exit $?
+    pbc-catalog-shell "$SNAPSHOT" "$ARCHIVE" || exit $?
   ;;
   mount)
-    readarray -t snapshots < <(get_snapshot_names)
-    (( ${#snapshots[@]} == 0 )) && echo "no snapshots found" && exit 0
+    select_snapshot_and_archive "${args[0]}" "${args[1]}"
+    case $? in
+      0) ;;
+      2) echo "no snapshots found"; exit 0 ;;
+      3) echo "no archives found"; exit 0 ;;
+      *) exit 1 ;;
+    esac
 
-    snapshot=${args[0]}
-    args=("${args[@]:1}")
-
-    PS3="Snapshot [1-${#snapshots[@]}]: "
-    snapshot=$(may_select "$snapshot" "${snapshots[@]}")
-    (( $? != 0 )) && echo "Error: invalid snapshot" >&2 && exit 1
-
-    readarray -t archives < <(get_snapshot_files "$snapshot")
-    (( ${#archives[@]} == 0 )) && echo "no archives found" && exit 0
-
-    archive=${args[0]}
-    args=("${args[@]:1}")
-
-    PS3="Archive [1-${#archives[@]}]: "
-    archive=$(may_select "$archive" "${archives[@]}")
-    (( $? != 0 )) && echo "Error: invalid archive" >&2 && exit 1
-
-    target=${args[0]}
-    args=("${args[@]:1}")
+    target=${args[2]}
 
     if [ -z "$target" ]; then
       while [ -z "$target" ]; do
@@ -371,30 +368,26 @@ case "$action" in
     fi
 
     echo
-    pbc-mount "$snapshot" "$archive" "$target" || exit $?
+    pbc-mount "$SNAPSHOT" "$ARCHIVE" "$target" || exit $?
   ;;
   install)
-    update=${args[0]:-false}
-
     (( EUID != 0 )) && echo "Error: installation only works as root!" >&2 && exit 1
 
-    install_proxmox_backup_client "$update" || exit $?
+    install_proxmox_backup_client "$update_pbc" || exit $?
 
     if dpkg -s jq &>/dev/null; then
-      $update && echo "Info: skip update of jq, package is managed by package manager" || echo "Info: jq is already installed"
+      $update_pbc && echo "Info: skip update of jq, package is managed by package manager" || echo "Info: jq is already installed"
     else
       apt_get_install jq || exit $?
     fi
 
-    ETC_DIR="/etc/$SCRIPT"
-
     if [ ! -d "$ETC_DIR" ]; then
       echo "Creating config directory $ETC_DIR ..."
       ! mkdir -p "$ETC_DIR" && echo "Error creating directory!" >&2 && exit 3
     fi
 
     if [ -f "$SCRIPT_DIR/config.example" ]; then
-      if $update || [ ! -f "$ETC_DIR/config.example" ]; then
+      if $update_pbc || [ ! -f "$ETC_DIR/config.example" ]; then
         echo "Install example config to $ETC_DIR/config.example ..."
         ! install -m 0640 "$SCRIPT_DIR/config.example" "$ETC_DIR/config.example" && echo "Error installing file!" >&2 && exit 4
       fi