scheduler: replace retool by go mod (#369)

scheduler/tools/.gitignore

@@ -0,0 +1 @@
+bin/

scheduler/tools/Makefile

@@ -0,0 +1,19 @@
+all: bin/govet bin/overalls bin/golangci-lint bin/revive bin/failpoint-ctl bin/goimports
+
+bin/govet:
+	go build -o $@ github.com/dnephin/govet
+
+bin/overalls:
+	go build -o $@ github.com/go-playground/overalls
+
+bin/golangci-lint:
+	go build -o $@ github.com/golangci/golangci-lint/cmd/golangci-lint
+
+bin/revive:
+	go build -o $@ github.com/mgechev/revive
+
+bin/failpoint-ctl:
+	go build -o $@ github.com/pingcap/failpoint/failpoint-ctl
+
+bin/goimports:
+	go build -o $@ golang.org/x/tools/cmd/goimports

scheduler/tools/go.mod

@@ -0,0 +1,15 @@
+module github.com/pingcap-incubator/tinykv/scheduler/_tools
+
+go 1.13
+
+require (
+	github.com/dnephin/govet v0.0.0-20171012192244-4a96d43e39d3
+	github.com/go-playground/overalls v0.0.0-20180201144345-22ec1a223b7c
+	github.com/golangci/golangci-lint v1.17.0
+	github.com/mgechev/dots v0.0.0-20210922191527-e955255bf517 // indirect
+	github.com/mgechev/revive v0.0.0-20180723234540-7773f47324c2
+	github.com/olekukonko/tablewriter v0.0.5 // indirect
+	github.com/pingcap/failpoint v0.0.0-20190512135322-30cc7431d99c
+	golang.org/x/tools v0.0.0-20190420000508-685fecacd0a0
+	gopkg.in/go-playground/assert.v1 v1.2.1 // indirect
+)

scheduler/tools/mod_guard.go

@@ -0,0 +1,12 @@
+// +build modguard
+
+package tools
+
+import (
+	_ "github.com/dnephin/govet"
+	_ "github.com/go-playground/overalls"
+	_ "github.com/golangci/golangci-lint/cmd/golangci-lint"
+	_ "github.com/mgechev/revive"
+	_ "github.com/pingcap/failpoint/failpoint-ctl"
+	_ "golang.org/x/tools/cmd/goimports"
+)