use makes realpath so its more crossplatform

License: MIT
Signed-off-by: Jeromy <jeromyj@gmail.com>

Makefile

@@ -29,7 +29,7 @@ gxgo_upgrade:
 	go get -u github.com/whyrusleeping/gx-go
 
 path_check:
-	@bin/check_go_path
+	@bin/check_go_path $(realpath $(shell pwd))
 
 gx_check:
 	@bin/check_gx_program "gx" "0.3" 'Upgrade or install gx using your package manager or run `make gx_upgrade`'

bin/check_go_path

 #!/bin/sh
 
-if [ -z "$GOPATH" ]; then
-	echo "GOPATH not set, you must have go configured properly to install ipfs"
+PWD=$1
+
+if [ -z "$PWD" ]; then
+	echo "must pass in your current working directory"
 	exit 1
 fi
 
-if ! type -f realpath > /dev/null; then
-	echo "program 'realpath' not found, it is required for this check"
+if [ -z "$GOPATH" ]; then
+	echo "GOPATH not set, you must have go configured properly to install ipfs"
 	exit 1
 fi
 
-PWD=$(pwd)
-REALPWD=$(realpath "$PWD")
 EXPECTED="$GOPATH/src/github.com/ipfs/go-ipfs"
 
-if [ "$REALPWD" != "$EXPECTED" ]; then
+if [ "$PWD" != "$EXPECTED" ]; then
 	echo "go-ipfs must be built from within your \$GOPATH directory."
+	echo "expected '$EXPECTED' but got '$PWD'"
 	exit 1
 fi