Fix Linux make (#171)

* Ensure use of bash in check_env.sh

* Ensure use of bash for check-fmt; create check_fmt.sh

Author: Utagai

Makefile

@@ -35,7 +35,7 @@ build:
 
 .PHONY: check-fmt
 check-fmt:
-	@gofmt -l -s $(PKGS) | read; if [ $$? == 0 ]; then echo "gofmt check failed for:"; gofmt -l -s $(PKGS) | sed -e 's/^/ - /'; exit 1; fi
+	etc/check_fmt.sh $(PKGS)
 
 .PHONY: fmt
 fmt:

etc/check_env.sh

@@ -1,4 +1,4 @@
-#!/bin/sh
+#!/usr/bin/env bash
 
 if [[ ! $TOPOLOGY =~ ^(server|replica_set|sharded_cluster)$ ]]; then
     >&2 echo "Invalid value of TOPOLOGY. TOPOLOGY must be set to one of: server, replica_set, sharded_cluster"

etc/check_fmt.sh

@@ -0,0 +1,9 @@
+#!/usr/bin/env bash
+
+gofmt_out="$(gofmt -l -s "$@")"
+
+if [[ $gofmt_out ]]; then
+  echo "gofmt check failed for:";
+  sed -e 's/^/ - /' <<< "$gofmt_out";
+  exit 1;
+fi