Switch to Go modules (#56)

This switches atomic to Go modules. This has the effect of simplifying
the Makefile and the Travis build, as well as getting rid of the overly
complicated coverage script we copied here.

Tools dependencies (currently only golint) were added to the tools.go.

As a result of this change, we no longer support the non-vanity import path
github.com/uber-go/atomic. Users must use the vanity import path, or add a
`replace` directive.

Supersedes #40

.gitignore

@@ -1,6 +1,7 @@
+/bin
 .DS_Store
 /vendor
-/cover
+cover.html
 cover.out
 lint.log
 

.travis.yml

@@ -2,26 +2,26 @@ sudo: false
 language: go
 go_import_path: go.uber.org/atomic
 
-go:
-  - 1.11.x
-  - 1.12.x
+env:
+  global:
+    - GO111MODULE=on
 
 matrix:
   include:
   - go: 1.12.x
-    env: NO_TEST=yes LINT=yes
+  - go: 1.13.x
+    env: LINT=1
 
 cache:
   directories:
     - vendor
 
-install:
-  - make install_ci
+before_install:
+  - go version
 
 script:
-  - test -n "$NO_TEST" || make test_ci
-  - test -n "$NO_TEST" || scripts/test-ubergo.sh
-  - test -z "$LINT" || make install_lint lint
+  - test -z "$LINT" || make lint
+  - make cover
 
 after_success:
   - bash <(curl -s https://codecov.io/bash)

CHANGELOG.md

@@ -4,6 +4,12 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## Unreleased
+### Changed
+- With Go modules, only the `go.uber.org/atomic` import path is supported now.
+  If you need to use the old import path, please add a `replace` directive to
+  your `go.mod`.
+
 ## [1.4.0] - 2019-05-01
 ### Added
  - Add `atomic.Error` type for atomic operations on `error` values.

Makefile

@@ -1,51 +1,35 @@
-# Many Go tools take file globs or directories as arguments instead of packages.
-PACKAGE_FILES ?= *.go
+# Directory to place `go install`ed binaries into.
+export GOBIN ?= $(shell pwd)/bin
 
-# For pre go1.6
-export GO15VENDOREXPERIMENT=1
+GOLINT = $(GOBIN)/golint
 
+GO_FILES ?= *.go
 
 .PHONY: build
 build:
-	go build -i ./...
-
-
-.PHONY: install
-install:
-	glide --version || go get github.com/Masterminds/glide
-	glide install
-
+	go build ./...
 
 .PHONY: test
 test:
-	go test -cover -race ./...
+	go test -race ./...
 
+.PHONY: gofmt
+gofmt:
+	$(eval FMT_LOG := $(shell mktemp -t gofmt.XXXXX))
+	gofmt -e -s -l $(GO_FILES) > $(FMT_LOG) || true
+	@[ ! -s "$(FMT_LOG)" ] || (echo "gofmt failed:" && cat $(FMT_LOG) && false)
 
-.PHONY: install_ci
-install_ci: install
-	go get github.com/wadey/gocovmerge
-	go get github.com/mattn/goveralls
-	go get golang.org/x/tools/cmd/cover
-
-.PHONY: install_lint
-install_lint:
-	go get golang.org/x/lint/golint
+$(GOLINT):
+	go install golang.org/x/lint/golint
 
+.PHONY: golint
+golint: $(GOLINT)
+	$(GOLINT) ./...
 
 .PHONY: lint
-lint:
-	@rm -rf lint.log
-	@echo "Checking formatting..."
-	@gofmt -d -s $(PACKAGE_FILES) 2>&1 | tee lint.log
-	@echo "Checking vet..."
-	@go vet ./... 2>&1 | tee -a lint.log
-	@echo "Checking lint..."
-	@golint $$(go list ./...) 2>&1 | tee -a lint.log
-	@echo "Checking for unresolved FIXMEs..."
-	@git grep -i fixme | grep -v -e vendor -e Makefile | tee -a lint.log
-	@[ ! -s lint.log ]
-
-
-.PHONY: test_ci
-test_ci: install_ci build
-	./scripts/cover.sh $(shell go list $(PACKAGES))
+lint: gofmt golint
+
+.PHONY: cover
+cover:
+	go test -coverprofile=cover.out -coverpkg ./... -v ./...
+	go tool cover -html=cover.out -o cover.html

README.md

@@ -3,9 +3,22 @@
 Simple wrappers for primitive types to enforce atomic access.
 
 ## Installation
-`go get -u go.uber.org/atomic`
+
+```shell
+$ go get -u go.uber.org/atomic@v1
+```
+
+Note: If you are using Go modules, this package will fail to compile with the
+import path `github.com/uber-go/atomic`. To continue using that import path,
+you will have to add a `replace` directive to your `go.mod`, replacing
+`github.com/uber-go/atomic` with `go.uber.org/atomic`.
+
+```shell
+$ go mod edit -replace github.com/uber-go/atomic=go.uber.org/atomic@v1
+```
 
 ## Usage
+
 The standard library's `sync/atomic` is powerful, but it's easy to forget which
 variables must be accessed atomically. `go.uber.org/atomic` preserves all the
 functionality of the standard library, but wraps the primitive types to
@@ -21,9 +34,11 @@ atom.CAS(40, 11)
 See the [documentation][doc] for a complete API specification.
 
 ## Development Status
+
 Stable.
 
-___
+---
+
 Released under the [MIT License](LICENSE.txt).
 
 [doc-img]: https://godoc.org/github.com/uber-go/atomic?status.svg

go.mod

@@ -0,0 +1,10 @@
+module go.uber.org/atomic
+
+require (
+	github.com/davecgh/go-spew v1.1.1 // indirect
+	github.com/stretchr/testify v1.3.0
+	golang.org/x/lint v0.0.0-20190930215403-16217165b5de
+	golang.org/x/tools v0.0.0-20191029041327-9cc4af7d6b2c // indirect
+)
+
+go 1.13

go.sum

@@ -0,0 +1,22 @@
+github.com/davecgh/go-spew v1.1.0 h1:ZDRjVQ15GmhC3fiQ8ni8+OwkZQO4DARzQgrnXU1Liz8=
+github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
+github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
+github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
+github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
+github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
+github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
+github.com/stretchr/testify v1.3.0 h1:TivCn/peBQ7UY8ooIcPgZFpTNSz0Q2U6UrFlUfqbe0Q=
+github.com/stretchr/testify v1.3.0/go.mod h1:M5WIy9Dh21IEIfnGCwXGc5bZfKNJtfHm1UVUgZn+9EI=
+golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2/go.mod h1:djNgcEr1/C05ACkg1iLfiJU5Ep61QUkGW8qpdssI0+w=
+golang.org/x/lint v0.0.0-20190930215403-16217165b5de h1:5hukYrvBGR8/eNkX5mdUezrA6JiaEZDtJb9Ei+1LlBs=
+golang.org/x/lint v0.0.0-20190930215403-16217165b5de/go.mod h1:6SW0HCj/g11FgYtHlgUYUwCkIfeOF89ocIRzGO/8vkc=
+golang.org/x/net v0.0.0-20190311183353-d8887717615a/go.mod h1:t9HGtf8HONx5eT2rtn7q6eTqICYqUVnKs3thJo3Qplg=
+golang.org/x/net v0.0.0-20190620200207-3b0461eec859/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
+golang.org/x/sync v0.0.0-20190423024810-112230192c58/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
+golang.org/x/sys v0.0.0-20190215142949-d0b11bdaac8a/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
+golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
+golang.org/x/tools v0.0.0-20190311212946-11955173bddd h1:/e+gpKk9r3dJobndpTytxS2gOy6m5uvpg+ISQoEcusQ=
+golang.org/x/tools v0.0.0-20190311212946-11955173bddd/go.mod h1:LCzVGOaR6xXOjkQ3onu1FJEFr0SW1gC7cKk1uF8kGRs=
+golang.org/x/tools v0.0.0-20191029041327-9cc4af7d6b2c h1:IGkKhmfzcztjm6gYkykvu/NiS8kaqbCWAEWWAyf8J5U=
+golang.org/x/tools v0.0.0-20191029041327-9cc4af7d6b2c/go.mod h1:b+2E5dAYhXwXZwtnZ6UAqBI28+e2cm9otk0dWdXHAEo=
+golang.org/x/xerrors v0.0.0-20190717185122-a985d3407aa7/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=

tools.go

@@ -0,0 +1,28 @@
+// Copyright (c) 2019 Uber Technologies, Inc.
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to deal
+// in the Software without restriction, including without limitation the rights
+// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+// copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in
+// all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+// THE SOFTWARE.
+
+// +build tools
+
+package atomic
+
+import (
+	// Tools used during development.
+	_ "golang.org/x/lint/golint"
+)