Add a config file feature(.build.env).

@@ -2,10 +2,6 @@
 
 set -e
 
-TAG=test-latest
-APP=moqui-app
-PUSH_TO=docker://5.161.91.120:31234
-PREFIX=
 declare -a images=(moqui-jdbc-drivers moqui-app)
 
 TOP_DIR="$(cd "$(dirname "$0")"; pwd -P)"
@@ -23,6 +19,11 @@ _push() {
 	done
 }
 
+APP=moqui-app
+OVERRIDE_TAG=
+DEVELOPER=
+PUSH_TO=
+PREFIX=
 while [[ $# -gt 0 ]]; do
 	case "$1" in
 		(--app)
@@ -38,7 +39,11 @@ while [[ $# -gt 0 ]]; do
 			shift 2
 			;;
 		(--tag)
-			TAG="$2"
+			OVERRIDE_TAG="$2"
+			shift 2
+			;;
+		(--developer)
+			DEVELOPER="$2"
 			shift 2
 			;;
 		(*)
@@ -46,6 +51,34 @@ while [[ $# -gt 0 ]]; do
 			;;
 	esac
 done
+
+declare -A build_env=()
+
+if [[ -f $APP/.build.env ]]; then
+	set -x
+	while read line; do
+		[[ $line = ^"#".* ]] && continue
+		if [[ $line =~ ^\s*(.*?)\s*=\s*(.*?)\s*$ ]]; then
+			build_env[${BASH_REMATCH[1]}]="${BASH_REMATCH[2]}"
+		fi
+	done < "$APP/.build.env"
+	set +x
+fi
+[[ -z $OVERRIDE_TAG ]] && OVERRIDE_TAG="${build_env["override-tag"]}"
+[[ -z $DEVELOPER ]] && DEVELOPER="${build_env["developer"]}"
+[[ -z $PREFIX ]] && PREFIX="${build_env["prefix"]}"
+[[ -z $PUSH_TO ]] && PUSH_TO="${build_env["push-to"]}"
+
+if [[ $OVERRIDE_TAG ]]; then
+	TAG="$OVERRIDE_TAG"
+elif [[ -e $APP/.git ]]; then
+	TAG="$(GIT_DIR="$APP/.git" git branch --show-current)"
+else
+	TAG=test-latest
+fi
+if [[ $DEVELOPER ]]; then
+	TAG+="-$DEVELOPER"
+fi
 case "$1" in
 	(build)
 		_build