Add timeout option to specify ssh_timeout via wrapacker

Closes #40
Fixes #8

arch-template.json

@@ -2,7 +2,8 @@
     "variables": {
         "iso_url": "https://mirrors.kernel.org/archlinux/iso/2015.12.01/archlinux-2015.12.01-dual.iso",
         "iso_checksum": "7de3315b1384e5d2769eca13453e87a8d303050e",
-        "iso_checksum_type": "sha1"
+        "iso_checksum_type": "sha1",
+        "ssh_timeout": "20m"
     },
     "builders": [
         {
@@ -24,6 +25,7 @@
             "hard_drive_interface": "sata",
             "ssh_username": "vagrant",
             "ssh_password": "vagrant",
+            "ssh_timeout": "{{user `ssh_timeout`}}",
             "shutdown_command": "sudo systemctl start poweroff.timer"
         },
         {
@@ -42,6 +44,7 @@
             "disk_size": 20480,
             "ssh_username": "vagrant",
             "ssh_password": "vagrant",
+            "ssh_timeout": "{{user `ssh_timeout`}}",
             "shutdown_command": "sudo systemctl start poweroff.timer"
         },
         {
@@ -64,6 +67,7 @@
             "disk_size": 20480,
             "ssh_username": "vagrant",
             "ssh_password": "vagrant",
+            "ssh_timeout": "{{user `ssh_timeout`}}",
             "shutdown_command": "sudo /parallels_tools.sh && sudo rm /parallels_tools.sh && sudo systemctl start poweroff.timer"
         }
     ],

wrapacker

@@ -24,6 +24,7 @@ else
 	readonly PACKER_BIN='packer'
 fi
 
+VALID_TIME_UNITS=(ns us ms s m h)
 
 ##### Functions
 
@@ -63,7 +64,7 @@ validate_country() {
 # print this script's usage message to stderr
 usage() {
 	cat <<-EOF >&2
-	usage: wrapacker [-c COUNTRY] [-p PROVIDER] [-h]
+	usage: wrapacker [-c COUNTRY] [-p PROVIDER] [-t TIMEOUT] [-h]
 	EOF
 }
 
@@ -83,6 +84,14 @@ print_valid_providers() {
 	done | column >&2
 }
 
+# print the list of valid time units to stderr
+print_valid_time_units() {
+	printf '\n*** VALID TIME UNITS ***\n\n' >&2
+	for units in "${VALID_TIME_UNITS[@]}"; do
+		printf '%-6s\n' "$units"
+	done | column >&2
+}
+
 # print this script's help message to stdout
 help() {
 	cat <<-EOF
@@ -111,6 +120,10 @@ help() {
 	     -d, --dry-run
 	            do not actually perform the build, just show what would run
 
+	     -t, --timeout
+	            sets the amount of time packer will wait for trying ssh login;
+	            defaults to 20m
+
 	     -h, --help
 	            view this help message
 
@@ -132,6 +145,7 @@ done
 country=''
 provider=''
 dry_run=''
+timeout=''
 
 # parse command line options
 while [[ $1 != '' ]]; do
@@ -153,10 +167,18 @@ while [[ $1 != '' ]]; do
 		-d| --dry-run)
 			dry_run=true
 			;;
+		-t | --timeout)
+			timeout=$2
+			shift
+			;;
+		--timeout=*)
+			timeout=${1#*=}
+			;;
 		-h | --help | -\?)
 			help
 			print_valid_countries
 			print_valid_providers
+			print_valid_time_units
 			exit 0
 			;;
 		--*)
@@ -209,18 +231,31 @@ else
 	MIRROR='https://mirrors.kernel.org/archlinux'
 fi
 
+if [[ $timeout ]]; then
+	if [[ "$timeout" =~ ^[0-9]+(ns|us|ms|s|m|h)$ ]]; then
+		TIMEOUT=$timeout
+	else
+		warn 'INVALID TIME UNITS SPECIFIED or MISSING UNIT - %s' "$timeout"
+		usage
+		print_valid_time_units
+		exit 1
+	fi
+fi
+
 SHA1SUMS=$(curl -s "${MIRROR}/iso/latest/sha1sums.txt")
 ISO_NAME=$(echo "$SHA1SUMS" | awk '/dual.iso/{ print $2 }')
 
 ISO_URL="${MIRROR}/iso/latest/${ISO_NAME}"
 ISO_CHECKSUM=$(echo "$SHA1SUMS" | awk '/dual.iso/{ print $1 }')
 
+TIMEOUT=${TIMEOUT:-"15m"}
 if [[ $dry_run ]]; then
 	cat <<-EOF
 		$PACKER_BIN build \\
 			-only=$PACKER_PROVIDER \\
 			-var "iso_url=$ISO_URL" \\
 			-var "iso_checksum=$ISO_CHECKSUM" \\
+			-var "ssh_timeout=$TIMEOUT" \\
 			arch-template.json
 	EOF
 else
@@ -228,6 +263,7 @@ else
 		-only=$PACKER_PROVIDER \
 		-var "iso_url=$ISO_URL" \
 		-var "iso_checksum=$ISO_CHECKSUM" \
+		-var "ssh_timeout=$TIMEOUT" \
 		arch-template.json
 fi