Fix codegen macos issues and update Makefile to use codegen.sh

Makefile

@@ -1,4 +1,4 @@
-.PHONY: build realize dep spec protobuf qa qa.test qa.vet
+.PHONY: build realize dep spec protobuf qa qa.test qa.vet codegen
 
 PKG       = "github.com/$(shell cat .project)"
 
@@ -28,9 +28,8 @@ dep.update:
 dep:
 	dep ensure -v
 
-spec: $(SPEC)
-	cd sam/docs/src && $(SPEC)
-	cd sam/ && ./_gen.sh
+codegen: $(SPEC)
+	./codegen.sh
 
 protobuf: $(PROTOC)
 	# @todo this needs work (it hangs and outputs nothing)

codegen.sh

@@ -1,14 +1,15 @@
 #!/bin/bash
 set -e
+set -x
 _PWD=$PWD
 SPECS=$(find $PWD -name 'spec.json' | xargs -n1 dirname)
 for SPEC in $SPECS; do
 	echo "=== spec $SPEC ==="
-	cd $SPEC && rm -rf spec && spec && cd $_PWD
+	cd $SPEC && rm -rf spec && ${GOPATH}/bin/spec && cd $_PWD
 
 	SRC=$(dirname $(dirname $SPEC))
 	echo "=== codegen $SRC ==="
-	GOPATHS=$(codegen/codegen.php $(basename $SRC) | tee -a /dev/stderr | xargs --no-run-if-empty -n1 dirname | sort | uniq)
+	GOPATHS=$(codegen/codegen.php $(basename $SRC) | tee -a /dev/stderr | xargs -n1 dirname | sort | uniq)
 	for FOLDER in $GOPATHS; do
 		if [[ $FOLDER != "." ]]; then
 			echo "== go fmt $FOLDER =="