Basic move to gomodules and linter setup

.gitignore

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

.golangci.yml

@@ -0,0 +1,69 @@
+# See https://github.com/golangci/golangci-lint#config-file
+run:
+  deadline: 1m #Default
+  issues-exit-code: 1 #Default
+  tests: true #Default
+
+linters:
+  enable:
+    - misspell
+    - goimports
+    - golint
+    - stylecheck
+    - unconvert
+    - dupl
+    - gosec
+    - scopelint
+    - nakedret
+    - gochecknoinits
+    - goconst
+    - gocritic
+    - gocyclo
+    - lll
+    - maligned
+    - prealloc
+    - unparam
+    - errcheck
+
+issues:
+  exclude-rules:
+    - path: _test\.go
+      linters:
+        - goconst # Don't run on test files because they may often repeate the same string
+        - scopelint # Otherwise you need tc := tc. This isn't actually a problem unless tests are being run in parallel.
+        - lll # Don't do line length checks in test code.
+        - dupl # Sometimes we duplicate a bunch in tests for the sake of clarity.
+    - path: nacl/secretbox
+      linters:
+        - gosec # Don't run gosec on nacl/secretbox* because we know it uses crypto/md5. TODO: Evaluate if this makes sense.
+    - path: hmetrics/onload/init.go
+      linters:
+        - gochecknoinits # The whole point of this package is to use init
+    - path: cmd/s3env/main.go
+      linters:
+        - gochecknoinits # TODO: FixMe
+    - path: go-kit/metrics/provider/librato/librato_test.go
+      linters:
+        - gocyclo # TODO: Refactor TestLibratoHistogramJSONMarshalers
+    - path: grpc/
+      linters:
+        - lll # GRPC code has notoriously long function signatures.
+    - path: go-kit/metrics/provider/librato/librato.go
+      linters:
+        - maligned # TODO: evaluate if this makes sense
+
+linters-settings:
+  misspell:
+    locale: US
+    #ignore-words:
+    #  - someword
+  goimports:
+    local-prefixes: github.com/heroku/x
+  gocyclo:
+    # minimal code complexity to report, 30 by default (but we recommend 10-20)
+    min-complexity: 14
+  lll:
+    # max line length, lines longer will be reported. Default is 120.
+    line-length: 130
+  maligned:
+    suggest-new: true

.travis.yml

@@ -1,6 +1,14 @@
 language: go
-go: 1.7.1
+go:
+  - 1.13.X
+  - 1.12.X
+  - 1.11.X
 sudo: false
-script: make travis
+env:
+  global:
+    - GO111MODULE=on
+    - GOTEST_OPT="-v -race"
+    - LINT_RUN_OPTS=""
+script: make test
 notifications:
   email: false

Makefile

@@ -1,27 +1,41 @@
-GO_FILES := $(shell find . -type f -name '*.go' -not -path "./vendor/*")
-GO_PACKAGES := $(shell go list ./... | sed "s/github.com\/heroku\/docker-registry-client/./" | grep -v "^./vendor/")
-
-build:
-	go build -v $(GO_PACKAGES)
-
-travis: tidy test
-
-test: build
-	go fmt $(GO_PACKAGES)
-	go test -race -i $(GO_PACKAGES)
-	go test -race -v $(GO_PACKAGES)
-
-# Setup & Code Cleanliness
-setup: hooks tidy
-
-hooks:
-	ln -fs ../../bin/git-pre-commit.sh .git/hooks/pre-commit
-
-tidy: goimports
-	test -z "$$(goimports -l -d $(GO_FILES) | tee /dev/stderr)"
-	go vet $(GO_PACKAGES)
-
-precommit: tidy test
-
-goimports:
-	go get golang.org/x/tools/cmd/goimports
+PKG_SPEC = ./registry/...
+MOD = -mod=readonly
+GOTEST = go test $(MOD)
+GOTEST_COVERAGE_OPT = -coverprofile=coverage.txt -covermode=atomic
+TOOLS_DIR = $(shell git rev-parse --show-toplevel)/.tools
+GOBUILD = go build $(MOD)
+
+ENV ?= development
+LINT_RUN_OPTS ?= --fix
+override GOTEST_OPT += -timeout 30s
+
+.DEFAULT_GOAL := precommit
+
+$(TOOLS_DIR)/golangci-lint: go.mod go.sum tools.go
+	$(GOBUILD) -o $(TOOLS_DIR)/golangci-lint github.com/golangci/golangci-lint/cmd/golangci-lint
+
+.PHONY: vars
+vars:
+	@echo "PKG_SPEC=$(PKG_SPEC)"
+	@echo "MOD=$(MOD)"
+	@echo "GOTEST=$(GOTEST)"
+	@echo "COVERAGE_OPT=$(COVERAGE_OPT)"
+	@echo "TOOLS_DIR=$(TOOLS_DIR)"
+	@echo "GOBUILD=$(GOBUILD)"
+	@echo "ENV=$(ENV)"
+
+.PHONY: precommit
+precommit: lint test coverage 
+
+.PHONY: lint
+lint: $(TOOLS_DIR)/golangci-lint
+	$(TOOLS_DIR)/golangci-lint run $(LINT_RUN_OPTS)
+
+.PHONY: coverage
+coverage:
+	$(GOTEST) $(GOTEST_OPT) $(GOTEST_COVERAGE_OPT) $(PKG_SPEC)
+	go tool cover -html=coverage.txt -o coverage.html
+
+.PHONY: test
+test:
+	$(GOTEST) $(GOTEST_OPT) $(PKG_SPEC)

go.mod

@@ -0,0 +1,12 @@
+module github.com/heroku/docker-registry-client
+
+go 1.12
+
+require (
+	github.com/docker/distribution v0.0.0-20171011171712-7484e51bf6af
+	github.com/docker/libtrust v0.0.0-20160708172513-aabc10ec26b7 // indirect
+	github.com/golangci/golangci-lint v1.17.1
+	github.com/gorilla/mux v1.7.3 // indirect
+	github.com/opencontainers/go-digest v1.0.0-rc1
+	github.com/stretchr/testify v1.4.0 // indirect
+)