add staticcheck make target

cleanup the old fmtcheck script while we're in here

Makefile

@@ -20,6 +20,9 @@ protobuf:
 fmtcheck:
 	@sh -c "'$(CURDIR)/scripts/gofmtcheck.sh'"
 
+staticcheck:
+	@sh -c "'$(CURDIR)/scripts/staticcheck.sh'"
+
 website:
 ifeq (,$(wildcard $(GOPATH)/src/$(WEBSITE_REPO)))
 	echo "$(WEBSITE_REPO) not found in your GOPATH (necessary for layouts and assets), get-ting..."
@@ -46,4 +49,4 @@ endif
 # under parallel conditions.
 .NOTPARALLEL:
 
-.PHONY: fmtcheck generate protobuf website website-test
+.PHONY: fmtcheck generate protobuf website website-test staticcheck

scripts/gofmtcheck.sh

@@ -2,11 +2,11 @@
 
 # Check go fmt
 echo "==> Checking that code complies with go fmt requirements..."
-gofmt_files=$(gofmt -l `find . -name '*.go' | grep -v vendor`)
+gofmt_files=$(go fmt ./...)
 if [[ -n ${gofmt_files} ]]; then
     echo 'gofmt needs running on the following files:'
     echo "${gofmt_files}"
-    echo "You can use the command: \`gofmt -w .\` to reformat code."
+    echo "You can use the command: \`go fmt\` to reformat code."
     exit 1
 fi
 

scripts/staticcheck.sh

@@ -0,0 +1,16 @@
+#!/usr/bin/env bash
+
+echo "==> Checking that code complies with static analysis requirements..."
+# Skip legacy code which is frozen, and can be removed once we can refactor the
+# remote backends to no longer require it.
+skip="internal/legacy|backend/remote-state/"
+
+# Skip generated code for protobufs.
+skip=$skip"|internal/planproto|internal/tfplugin5|internal/tfplugin6"
+
+packages=$(go list ./... | egrep -v ${skip})
+
+# We are skipping style-related checks, since terraform intentionally breaks
+# some of these. The goal here is to find issues that reduce code clarity, or
+# may result in bugs.
+staticcheck -checks 'all,-ST*' ${packages}