too many files for shell during Make, convert .go and .sh to EOL=lf

.gitattributes

@@ -1,2 +1,4 @@
-
-common/test-fixtures/root/*	eol=lf
+* text=auto
+*.go text eol=lf
+*.sh text eol=lf
+common/test-fixtures/root/*	eol=lf

Makefile

@@ -4,7 +4,7 @@ VET?=$(shell ls -d */ | grep -v vendor | grep -v website)
 GITSHA:=$(shell git rev-parse HEAD)
 # Get the current local branch name from git (if we can, this may be blank)
 GITBRANCH:=$(shell git symbolic-ref --short HEAD 2>/dev/null)
-GOFMT_FILES?=$$(find . -not -path "./vendor/*" -name "*.go")
+GOFMT_FILES?=find . -path ./vendor -prune -o -name "*.go"
 GOOS=$(shell go env GOOS)
 GOARCH=$(shell go env GOARCH)
 GOPATH=$(shell go env GOPATH)
@@ -57,10 +57,13 @@ dev: deps ## Build and install a development build
 	@cp $(GOPATH)/bin/packer pkg/$(GOOS)_$(GOARCH)
 
 fmt: ## Format Go code
-	@gofmt -w -s $(GOFMT_FILES)
+	@$(GOFMT_FILES) | xargs gofmt -w -s
 
 fmt-check: ## Check go code formatting
-	$(CURDIR)/scripts/gofmtcheck.sh $(GOFMT_FILES)
+	@echo "==> Checking that code complies with gofmt requirements..."
+	@echo "You can use the command: \`make fmt\` to reformat code."
+	@$(GOFMT_FILES) | xargs $(CURDIR)/scripts/gofmtcheck.sh
+	@echo "Check complete."
 
 fmt-docs:
 	@find ./website/source/docs -name "*.md" -exec pandoc --wrap auto --columns 79 --atx-headers -s -f "markdown_github+yaml_metadata_block" -t "markdown_github+yaml_metadata_block" {} -o {} \;

scripts/gofmtcheck.sh

@@ -1,14 +1,8 @@
 #!/usr/bin/env bash
 
-# Check gofmt
-echo "==> Checking that code complies with gofmt requirements..."
-gofmt_files=$(gofmt -s -l ${@})
-if [[ -n ${gofmt_files} ]]; then
-    echo 'gofmt needs running on the following files:'
-    echo "${gofmt_files}"
-    echo "You can use the command: \`make fmt\` to reformat code."
-    exit 1
-fi
-echo "Check passed."
+for f in $@; do
+  [ -n "`dos2unix 2>/dev/null < $f | gofmt -s -d`" ] && echo $f
+done
 
+# always return success or else 'make' will abort
 exit 0