setup-mta: add usage help text

1 files changed, 31 insertions, 5 deletions

diff --git a/setup-mta.in b/setup-mta.in
index c75431a..eaea499 100644
--- a/setup-mta.in
+++ b/setup-mta.in
@@ -1,10 +1,25 @@
 #!/bin/sh
 
 PREFIX=@PREFIX@
-. "$PREFIX/lib/libalpine.sh"
+: ${LIBDIR=$PREFIX/lib}
+. "$LIBDIR/libalpine.sh"
 
 conf="$ROOT/etc/ssmtp/ssmtp.conf"
 
+usage() {
+	cat <<-EOF
+		usage: setup-mta [-h] [SMTPSERVER]
+
+		Setup SMTP server for outgoing email
+
+		options:
+		 -h  Show this help
+
+        If SMTPSERVER is not prompted user will be prompted
+	EOF
+	exit $1
+}
+
 cfgval() {
 	awk -F= "/^$1/ {print \$2}" $conf 2>/dev/null
 }
@@ -12,12 +27,23 @@ cfgval() {
 setcfg() {
 	local key=$1
 	local value=$2
-	sed -i "s/^\\(\\#\\)*$key=.*/$key=$value/" "$conf"
-	if ! grep "^$key=" "$conf" >/dev/null ; then
+	mkdir -p "${conf%/*}"
+	sed -i "s/^\\(\\#\\)*$key=.*/$key=$value/" "$conf" 2>/dev/null
+	if ! grep -q "^$key=" "$conf" 2>/dev/null; then
 		echo "$key=$value" >> "$conf"
 	fi
 }
 
+while getopts "h" opt; do
+	case $opt in
+		h) usage 0;;
+		'?') usage "1"  >&2;;
+	esac
+done
+shift $(( $OPTIND - 1 ))
+
+mailhub="$1"
+
 if [ -f "$conf" ] ; then
 	mailhub=$(cfgval mailhub)
 fi
@@ -32,7 +58,7 @@ fi
 
 res=
 
-while [ "$res" != "221" ]; do
+while [ $# -eq 0 ] && [ "$res" != "221" ]; do
 	ask "Outgoing mail server? (e.g 'smtp.isp.com')"  "$mailhub"
 	mailhub="$resp"
 	if ! ask_yesno "Test connection? (y/n)" y; then
@@ -42,7 +68,7 @@ while [ "$res" != "221" ]; do
 	[ "x$res" = "x221" ] && echo "Connection to $mailhub is ok."
 done
 
-apk add ssmtp
+$MOCK apk add ssmtp
 
 setcfg mailhub $mailhub
 setcfg FromLineOverride YES