Add debug mode to provisioning script

deployment/proxmox/provision.sh

@@ -24,6 +24,8 @@ cores=1
 memory=2048
 vm_ids=
 
+debug=false
+
 help () {
   cat <<EOF
 Usage: $0 [OPTION...] [ID...]
@@ -40,6 +42,7 @@ Other options:
   --sockets INT     Number of sockets (default: $sockets)
   --cores INT       Number of cores (default: $cores)
   --memory INT      Memory (default: $memory)
+  --debug           Run this script in debug mode
 
 Others:
   -h|-?|--help      Show this help and exit
@@ -51,6 +54,9 @@ die () { printf '\033[31m'; printf "$@"; printf '\033[0m\n'; exit 2; }
 # shellcheck disable=SC2059
 die_with_help () { printf '\033[31m'; printf "$@"; printf '\033[0m\n'; help; exit 2; }
 
+# shellcheck disable=SC2059
+debug () { if $debug; then printf >&2 '\033[37m'; printf >&2 "$@"; printf >&2 '\033[0m\n'; fi }
+
 while [ $# -gt 0 ]; do
   argument=$1
   shift
@@ -62,6 +68,8 @@ while [ $# -gt 0 ]; do
     --cores) cores=$1; shift ;;
     --memory) memory=$1; shift ;;
 
+    --debug) debug=true ;;
+
     -h|-\?|--help) help; exit 0 ;;
 
     -*) die_with_help "Unknown argument: '%s'." "$argument" ;;
@@ -91,6 +99,8 @@ readonly memory
 # fi
 # readonly node
 
+readonly debug
+
 ################################################################################
 ## Getting started
 
@@ -117,14 +127,19 @@ release_lock () {
 
 proxmox () {
   acquire_lock proxmox
-  http \
-    --form \
-    --verify no \
-    --ignore-stdin \
-    "$@" \
-    "Cookie:PVEAuthCookie=$ticket" \
-    "CSRFPreventionToken:$csrf_token"
+  debug 'request %s' "$*"
+  response=$(
+    http \
+      --form \
+      --verify no \
+      --ignore-stdin \
+      "$@" \
+      "Cookie:PVEAuthCookie=$ticket" \
+      "CSRFPreventionToken:$csrf_token"
+  )
+  debug 'response to request %s:\n  %s' "$*" "$response"
   release_lock proxmox
+  echo "$response"
 }
 
 ## Synchronous variant for when the `proxmox` function would just respond an