Support build and run azure terraform provider on native Windows.

GNUmakefile

@@ -27,10 +27,10 @@ fmt:
 	gofmt -w $(GOFMT_FILES)
 
 fmtcheck:
-	@sh -c "'$(CURDIR)/scripts/gofmtcheck.sh'"
+	@sh "$(CURDIR)/scripts/gofmtcheck.sh"
 
 errcheck:
-	@sh -c "'$(CURDIR)/scripts/errcheck.sh'"
+	@sh "$(CURDIR)/scripts/errcheck.sh"
 
 vendor-status:
 	@govendor status

README.md

@@ -5,12 +5,21 @@ AzureRM Terraform Provider
 - [![Gitter chat](https://badges.gitter.im/hashicorp-terraform/Lobby.png)](https://gitter.im/hashicorp-terraform/Lobby)
 - Mailing list: [Google Groups](http://groups.google.com/group/terraform-tool)
 
-Requirements
+General Requirements
 ------------
 
 -	[Terraform](https://www.terraform.io/downloads.html) 0.10.x
 -	[Go](https://golang.org/doc/install) 1.9 (to build the provider plugin)
 
+Windows Specific Requirements
+-----------------------------
+- [Make for Windows](http://gnuwin32.sourceforge.net/packages/make.htm)
+- [Git Bash for Windows](https://git-scm.com/download/win)
+
+For *GNU32 Make*, make sure its bin path is added to PATH environment variable.*
+
+For *Git Bash for Windows*, at the step of "Adjusting your PATH environment", please choose "Use Git and optional Unix tools from Windows Command Prompt".*
+
 Building The Provider
 ---------------------
 

scripts/gofmtcheck.sh

@@ -3,7 +3,7 @@
 # Check gofmt
 echo "==> Checking that code complies with gofmt requirements..."
 gofmt_files=$(gofmt -l `find . -name '*.go' | grep -v vendor`)
-if [[ -n ${gofmt_files} ]]; then
+if [ -n "${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."