Install tools locally to guarantee same version

.circleci/config.yaml

@@ -6,9 +6,6 @@ jobs:
       - image: circleci/golang:1.12
     steps:
       - checkout
-      - run:
-          name: Install tools
-          command: make install-tools
       - run:
           name: Verify
-          command: make circle-ci
+          command: make precommit

.gitignore

@@ -0,0 +1 @@
+.tools

Makefile

@@ -1,21 +1,19 @@
 # All documents to be used in spell check.
-ALL_DOC := $(shell find . -name '*.md' -type f | sort)
+ALL_DOCS := $(shell find . -name '*.md' -type f | sort)
 
-MISSPELL=misspell -error
-MISSPELL_CORRECTION=misspell -w
+TOOLS_DIR := ./.tools
 
-.PHONY: circle-ci
-circle-ci: misspell
+$(TOOLS_DIR)/misspell: go.mod go.sum internal/tools.go
+	go build -o $(TOOLS_DIR)/misspell github.com/client9/misspell/cmd/misspell
+
+.PHONY: precommit
+precommit: $(TOOLS_DIR)/misspell misspell
 
 .PHONY: misspell
 misspell:
-	$(MISSPELL) $(ALL_DOC)
+	$(TOOLS_DIR)/misspell -error $(ALL_DOCS)
 
 .PHONY: misspell-correction
 misspell-correction:
-	$(MISSPELL_CORRECTION) $(ALL_DOC)
+	$(TOOLS_DIR)/misspell -w $(ALL_DOCS)
 
-.PHONY: install-tools
-install-tools:
-	GO111MODULE=on go install \
-	  github.com/client9/misspell/cmd/misspell