Allow to use custom Gemfile

configure.ac

@@ -303,6 +303,10 @@ AC_ARG_WITH([snmp-mibs-dir],
 	    [SNMP_MIB_DIR="$prefix/share/snmp/mibs"])
 AC_SUBST([SNMP_MIB_DIR])
 
+AC_ARG_WITH([custom-gemfile],
+	  [AS_HELP_STRING([--with-custom-gemfile=PATH], [Use custom gemfile instead of autogenerated. Effective only with the local-build option. Default: empty])],
+	  [PCS_CUSTOM_GEMFILE="$withval"])
+
 # python detection section
 PCS_BUNDLED_DIR_LOCAL="pcs_bundled"
 AC_SUBST([PCS_BUNDLED_DIR_LOCAL])
@@ -397,12 +401,26 @@ AC_SUBST([PCSD_BUNDLED_DIR_LOCAL])
 AC_SUBST([PCSD_BUNDLED_CACHE_DIR])
 
 rm -rf Gemfile Gemfile.lock
-echo "source 'https://rubygems.org'" > Gemfile
-echo "" >> Gemfile
+
+if test "x$local_build" = "xyes"; then
+	if test "x$PCS_CUSTOM_GEMFILE" != "x"; then
+		if ! test -e "$PCS_CUSTOM_GEMFILE"; then
+			AC_MSG_ERROR([custom gemfile '$PCS_CUSTOM_GEMFILE' does not exist])
+		fi
+		cp "$PCS_CUSTOM_GEMFILE" Gemfile
+	else
+		echo "source 'https://rubygems.org'" > Gemfile
+		echo "" >> Gemfile
+	fi
+fi
 
 # PCS_BUNDLE_GEM([module])
 AC_DEFUN([PCS_BUNDLE_GEM], [
-	echo "gem '$1'" >> Gemfile
+	if test "x$PCS_CUSTOM_GEMFILE" = "x"; then
+		echo "gem '$1'" >> Gemfile
+	else
+		grep "$1" Gemfile || AC_MSG_ERROR([custom gemfile missing required gem '$1'])
+	fi
 	if test "x$cache_only" = "xyes"; then
 		src=`ls $PCSD_BUNDLED_CACHE_DIR/$1-*`
 		if test "x$src" = "x"; then