feat(cli): add basis for new "emacs-builder" CLI tool written in Go

This will eventually replace the build-emacs-for-macos script that's
written in Ruby. The migration of functionality will happen bit by bit
over time.

.github/workflows/ci.yml

@@ -0,0 +1,52 @@
+---
+name: CI
+on: [push]
+
+jobs:
+  lint:
+    name: Lint
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+      - name: golangci-lint
+        uses: golangci/golangci-lint-action@v2
+        with:
+          version: v1.40
+        env:
+          VERBOSE: "true"
+
+  tidy:
+    name: Tidy
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+      - uses: actions/setup-go@v2
+        with:
+          go-version: 1.16
+      - uses: actions/cache@v2
+        with:
+          path: ~/go/pkg/mod
+          key: ${{ runner.os }}-go-${{ hashFiles('**/go.sum') }}
+          restore-keys: |
+            ${{ runner.os }}-go-
+      - name: Check if mods are tidy
+        run: make check-tidy
+
+  test:
+    name: Test
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+      - uses: actions/setup-go@v2
+        with:
+          go-version: 1.16
+      - uses: actions/cache@v2
+        with:
+          path: ~/go/pkg/mod
+          key: ${{ runner.os }}-go-${{ hashFiles('**/go.sum') }}
+          restore-keys: |
+            ${{ runner.os }}-go-
+      - name: Run tests
+        run: make test
+        env:
+          VERBOSE: "true"

.gitignore

@@ -1,6 +1,8 @@
 .DS_Store
+.envrc
 Formula/*
 Gemfile.lock
+bin
 builds
 sources
 tarballs

.golangci.yml

@@ -0,0 +1,86 @@
+linters-settings:
+  funlen:
+    lines: 100
+    statements: 150
+  goconst:
+    min-occurrences: 5
+  gocyclo:
+    min-complexity: 20
+  govet:
+    check-shadowing: true
+    enable-all: true
+    disable:
+      - fieldalignment
+  lll:
+    line-length: 80
+    tab-width: 4
+  maligned:
+    suggest-new: true
+  misspell:
+    locale: US
+
+linters:
+  disable-all: true
+  enable:
+    - bodyclose
+    - deadcode
+    - depguard
+    - dupl
+    - errcheck
+    - exportloopref
+    - funlen
+    - gochecknoinits
+    - goconst
+    - gocritic
+    - gocyclo
+    - gofumpt
+    - goimports
+    - goprintffuncname
+    - goprintffuncname
+    - gosec
+    - gosimple
+    - govet
+    - ineffassign
+    - lll
+    - misspell
+    - nakedret
+    - nlreturn
+    - noctx
+    - nolintlint
+    - revive
+    - sqlclosecheck
+    - staticcheck
+    - structcheck
+    - typecheck
+    - unconvert
+    - unused
+    - varcheck
+    - whitespace
+
+issues:
+  include:
+  # - EXC0002 # disable excluding of issues about comments from golint
+  exclude:
+    - Using the variable on range scope `tt` in function literal
+    - Using the variable on range scope `tc` in function literal
+  exclude-rules:
+    - path: "_test\\.go"
+      linters:
+        - funlen
+        - dupl
+        - goconst
+    - source: "^//go:generate "
+      linters:
+        - lll
+    - source: "`json:"
+      linters:
+        - lll
+
+run:
+  skip-dirs:
+    - builds
+    - sources
+    - tarballs
+  timeout: 2m
+  allow-parallel-runners: true
+  modules-download-mode: readonly

Makefile

@@ -1,3 +1,166 @@
+SOURCES := $(shell \
+	find * \
+	-not -path 'sources/*' \
+	-not -path 'builds/*' \( \
+		-name "*.go" -or \
+		-name "go.mod" -or \
+		-name "go.sum" -or \
+		-name "Makefile" -or \
+		-type f -path 'internal/*' -or \
+		-type f -path 'cmd/*' -or \
+		-type f -path 'pkg/*' \
+	\) | grep -v '.DS_Store' \
+)
+
+#
+# Environment
+#
+
+# Verbose output
+ifdef VERBOSE
+V = -v
+endif
+
+BINDIR := bin
+TOOLDIR := $(BINDIR)/tools
+
+# Global environment variables for all targets
+SHELL ?= /bin/bash
+SHELL := env \
+	GO111MODULE=on \
+	GOBIN=$(CURDIR)/$(BINDIR) \
+	CGO_ENABLED=0 \
+	PATH='$(CURDIR)/$(BINDIR):$(CURDIR)/$(TOOLDIR):$(PATH)' \
+	$(SHELL)
+
+#
+# Defaults
+#
+
+# Default target
+.DEFAULT_GOAL := build
+
+#
+# Tools
+#
+
+# external tool
+define tool # 1: binary-name, 2: go-import-path
+TOOLS += $(TOOLDIR)/$(1)
+
+$(TOOLDIR)/$(1): Makefile
+	GOBIN="$(CURDIR)/$(TOOLDIR)" go install "$(2)"
+endef
+
+$(eval $(call tool,gofumpt,mvdan.cc/gofumpt@latest))
+$(eval $(call tool,golangci-lint,github.com/golangci/golangci-lint/cmd/golangci-lint@v1.40))
+$(eval $(call tool,gomod,github.com/Helcaraxan/gomod@latest))
+
+.PHONY: tools
+tools: $(TOOLS)
+
+#
+# Build
+#
+
+LDFLAGS := -w -s
+
+VERSION ?= $(shell git describe --tags --exact 2>/dev/null)
+COMMIT  ?= $(shell git rev-parse HEAD 2>/dev/null)
+DATE    ?= $(shell date '+%FT%T%z')
+
+ifeq ($(VERSION),)
+	VERSION = 0.0.0-dev
+endif
+
+CMDDIR := cmd
+BINS := $(shell test -d "$(CMDDIR)" && cd "$(CMDDIR)" && \
+	find * -maxdepth 0 -type d -exec echo $(BINDIR)/{} \;)
+
+.PHONY: build
+build: $(BINS)
+
+$(BINS): $(BINDIR)/%: $(SOURCES)
+	mkdir -p "$(BINDIR)"
+	cd "$(CMDDIR)/$*" && go build -a $(V) \
+		-o "$(CURDIR)/$(BINDIR)/$*" \
+		-ldflags "$(LDFLAGS) \
+			-X main.version=$(VERSION) \
+			-X main.commit=$(COMMIT) \
+			-X main.date=$(DATE)"
+
+#
+# Development
+#
+
+TEST ?= $$(go list ./... | grep -v 'sources/')
+
+.PHONY: clean
+clean:
+	rm -rf $(BINARY) $(TOOLS)
+	rm -f ./go.mod.tidy-check ./go.sum.tidy-check
+
+.PHONY: test
+test:
+	CGO_ENABLED=1 go test $(V) -count=1 -race $(TESTARGS) $(TEST)
+
+.PHONY: lint
+lint: $(TOOLDIR)/golangci-lint
+	golangci-lint $(V) run
+
+.PHONY: format
+format: $(TOOLDIR)/gofumpt
+	gofumpt -w .
+
+#
+# Dependencies
+#
+
+.PHONY: deps
+deps:
+	$(info Downloading dependencies)
+	go mod download
+
+.PHONY: deps-update
+deps-update:
+	$(info Downloading dependencies)
+	go get -u -t ./...
+
+.PHONY: deps-analyze
+deps-analyze: $(TOOLDIR)/gomod
+	gomod analyze
+
+.PHONY: tidy
+tidy:
+	go mod tidy $(V)
+
+.PHONY: verify
+verify:
+	go mod verify
+
+.SILENT: check-tidy
+.PHONY: check-tidy
+check-tidy:
+	cp go.mod go.mod.tidy-check
+	cp go.sum go.sum.tidy-check
+	go mod tidy
+	( \
+		diff go.mod go.mod.tidy-check && \
+		diff go.sum go.sum.tidy-check && \
+		rm -f go.mod go.sum && \
+		mv go.mod.tidy-check go.mod && \
+		mv go.sum.tidy-check go.sum \
+	) || ( \
+		rm -f go.mod go.sum && \
+		mv go.mod.tidy-check go.mod && \
+		mv go.sum.tidy-check go.sum; \
+		exit 1 \
+	)
+
+#
+# Release
+#
+
 .PHONY: new-version
 new-version: check-npx
 	npx standard-version

cmd/emacs-builder/main.go

@@ -0,0 +1,24 @@
+package main
+
+import (
+	"fmt"
+	"os"
+
+	"github.com/jimeh/build-emacs-for-macos/pkg/cli"
+)
+
+var (
+	version string
+	commit  string
+	date    string
+)
+
+func main() {
+	cliInstance := cli.New(version, commit, date)
+
+	err := cliInstance.Run(os.Args)
+	if err != nil {
+		fmt.Fprintf(os.Stderr, "ERROR: %s\n", err.Error())
+		os.Exit(1)
+	}
+}

go.mod

@@ -0,0 +1,15 @@
+module github.com/jimeh/build-emacs-for-macos
+
+go 1.16
+
+require (
+	github.com/cpuguy83/go-md2man/v2 v2.0.0 // indirect
+	github.com/fatih/color v1.12.0 // indirect
+	github.com/hashicorp/go-hclog v0.16.1
+	github.com/mattn/go-isatty v0.0.13 // indirect
+	github.com/russross/blackfriday/v2 v2.1.0 // indirect
+	github.com/stretchr/testify v1.6.1 // indirect
+	github.com/urfave/cli/v2 v2.3.0
+	golang.org/x/sys v0.0.0-20210603125802-9665404d3644 // indirect
+	gopkg.in/yaml.v3 v3.0.0-20210107192922-496545a6307b // indirect
+)

go.sum

@@ -0,0 +1,43 @@
+github.com/BurntSushi/toml v0.3.1/go.mod h1:xHWCNGjB5oqiDr8zfno3MHue2Ht5sIBksp03qcyfWMU=
+github.com/cpuguy83/go-md2man/v2 v2.0.0-20190314233015-f79a8a8ca69d/go.mod h1:maD7wRr/U5Z6m/iR4s+kqSMx2CaBsrgA7czyZG/E6dU=
+github.com/cpuguy83/go-md2man/v2 v2.0.0 h1:EoUDS0afbrsXAZ9YQ9jdu/mZ2sXgT1/2yyNng4PGlyM=
+github.com/cpuguy83/go-md2man/v2 v2.0.0/go.mod h1:maD7wRr/U5Z6m/iR4s+kqSMx2CaBsrgA7czyZG/E6dU=
+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/fatih/color v1.7.0/go.mod h1:Zm6kSWBoL9eyXnKyktHP6abPY2pDugNf5KwzbycvMj4=
+github.com/fatih/color v1.12.0 h1:mRhaKNwANqRgUBGKmnI5ZxEk7QXmjQeCcuYFMX2bfcc=
+github.com/fatih/color v1.12.0/go.mod h1:ELkj/draVOlAH/xkhN6mQ50Qd0MPOk5AAr3maGEBuJM=
+github.com/hashicorp/go-hclog v0.16.1 h1:IVQwpTGNRRIHafnTs2dQLIk4ENtneRIEEJWOVDqz99o=
+github.com/hashicorp/go-hclog v0.16.1/go.mod h1:whpDNt7SSdeAju8AWKIWsul05p54N/39EeqMAyrmvFQ=
+github.com/mattn/go-colorable v0.1.4/go.mod h1:U0ppj6V5qS13XJ6of8GYAs25YV2eR4EVcfRqFIhoBtE=
+github.com/mattn/go-colorable v0.1.8 h1:c1ghPdyEDarC70ftn0y+A/Ee++9zz8ljHG1b13eJ0s8=
+github.com/mattn/go-colorable v0.1.8/go.mod h1:u6P/XSegPjTcexA+o6vUJrdnUu04hMope9wVRipJSqc=
+github.com/mattn/go-isatty v0.0.8/go.mod h1:Iq45c/XA43vh69/j3iqttzPXn0bhXyGjM0Hdxcsrc5s=
+github.com/mattn/go-isatty v0.0.10/go.mod h1:qgIWMr58cqv1PHHyhnkY9lrL7etaEgOFcMEpPG5Rm84=
+github.com/mattn/go-isatty v0.0.12/go.mod h1:cbi8OIDigv2wuxKPP5vlRcQ1OAZbq2CE4Kysco4FUpU=
+github.com/mattn/go-isatty v0.0.13 h1:qdl+GuBjcsKKDco5BsxPJlId98mSWNKqYA+Co0SC1yA=
+github.com/mattn/go-isatty v0.0.13/go.mod h1:cbi8OIDigv2wuxKPP5vlRcQ1OAZbq2CE4Kysco4FUpU=
+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/russross/blackfriday/v2 v2.0.1/go.mod h1:+Rmxgy9KzJVeS9/2gXHxylqXiyQDYRxCVz55jmeOWTM=
+github.com/russross/blackfriday/v2 v2.1.0 h1:JIOH55/0cWyOuilr9/qlrm0BSXldqnqwMsf35Ld67mk=
+github.com/russross/blackfriday/v2 v2.1.0/go.mod h1:+Rmxgy9KzJVeS9/2gXHxylqXiyQDYRxCVz55jmeOWTM=
+github.com/shurcooL/sanitized_anchor_name v1.0.0/go.mod h1:1NzhyTcUVG4SuEtjjoZeVRXNmyL/1OwPU0+IJeTBvfc=
+github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
+github.com/stretchr/testify v1.2.2/go.mod h1:a8OnRcib4nhh0OaRAV+Yts87kKdq0PP7pXfy6kDkUVs=
+github.com/stretchr/testify v1.6.1 h1:hDPOHmpOpP40lSULcqw7IrRb/u7w6RpDC9399XyoNd0=
+github.com/stretchr/testify v1.6.1/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/h/Wwjteg=
+github.com/urfave/cli/v2 v2.3.0 h1:qph92Y649prgesehzOrQjdWyxFOp/QVM+6imKHad91M=
+github.com/urfave/cli/v2 v2.3.0/go.mod h1:LJmUH05zAU44vOAcrfzZQKsZbVcdbOG8rtL3/XcUArI=
+golang.org/x/sys v0.0.0-20190222072716-a9d3bda3a223/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
+golang.org/x/sys v0.0.0-20191008105621-543471e840be/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+golang.org/x/sys v0.0.0-20200116001909-b77594299b42/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+golang.org/x/sys v0.0.0-20200223170610-d5e6a3e2c0ae/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+golang.org/x/sys v0.0.0-20210603125802-9665404d3644 h1:CA1DEQ4NdKphKeL70tvsWNdT5oFh1lOjihRcEDROi0I=
+golang.org/x/sys v0.0.0-20210603125802-9665404d3644/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
+gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
+gopkg.in/yaml.v2 v2.2.3/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
+gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
+gopkg.in/yaml.v3 v3.0.0-20210107192922-496545a6307b h1:h8qDotaEPuJATrMmW04NCwg7v22aHH28wwpauUhK9Oo=
+gopkg.in/yaml.v3 v3.0.0-20210107192922-496545a6307b/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=

pkg/cli/cli.go

@@ -0,0 +1,89 @@
+package cli
+
+import (
+	"fmt"
+	"strings"
+
+	cli2 "github.com/urfave/cli/v2"
+)
+
+type CLI struct {
+	App     *cli2.App
+	Version string
+	Commit  string
+	Date    string
+}
+
+func New(version, commit, date string) *CLI {
+	if version == "" {
+		version = "0.0.0-dev"
+	}
+
+	c := &CLI{
+		Version: version,
+		Commit:  commit,
+		Date:    date,
+		App: &cli2.App{
+			Name:                 "emacs-builder",
+			Usage:                "Tool to build emacs",
+			Version:              version,
+			EnableBashCompletion: true,
+			Flags: []cli2.Flag{
+				&cli2.StringFlag{
+					Name:    "log-level",
+					Usage:   "set log level",
+					Aliases: []string{"l"},
+					Value:   "info",
+				},
+				&cli2.BoolFlag{
+					Name:    "quiet",
+					Usage:   "silence noisy output",
+					Aliases: []string{"q"},
+					Value:   false,
+				},
+				cli2.VersionFlag,
+			},
+			Commands: []*cli2.Command{
+				{
+					Name:    "version",
+					Usage:   "print the version",
+					Aliases: []string{"v"},
+					Action: func(c *cli2.Context) error {
+						cli2.VersionPrinter(c)
+
+						return nil
+					},
+				},
+			},
+		},
+	}
+
+	cli2.VersionPrinter = c.VersionPrinter
+
+	return c
+}
+
+func (s *CLI) VersionPrinter(c *cli2.Context) {
+	version := c.App.Version
+	if version == "" {
+		version = "0.0.0-dev"
+	}
+
+	extra := []string{}
+	if len(s.Commit) >= 7 {
+		extra = append(extra, s.Commit[0:7])
+	}
+	if s.Date != "" {
+		extra = append(extra, s.Date)
+	}
+	var extraOut string
+	if len(extra) > 0 {
+		extraOut += " (" + strings.Join(extra, ", ") + ")"
+	}
+
+	fmt.Printf("%s%s\n", version, extraOut)
+}
+
+func (s *CLI) Run(args []string) error {
+	return s.App.Run(args)
+}

pkg/cli/options.go

@@ -0,0 +1,49 @@
+package cli
+
+import (
+	"fmt"
+	"os"
+	"sync"
+	"time"
+
+	"github.com/hashicorp/go-hclog"
+	cli2 "github.com/urfave/cli/v2"
+)
+
+type Options struct {
+	quiet bool
+}
+
+func actionWrapper(
+	f func(*cli2.Context, *Options) error,
+) func(*cli2.Context) error {
+	return func(c *cli2.Context) error {
+		opts := &Options{
+			quiet: c.Bool("quiet"),
+		}
+
+		levelStr := c.String("log-level")
+		level := hclog.LevelFromString(levelStr)
+		if level == hclog.NoLevel {
+			return fmt.Errorf("invalid log level \"%s\"", levelStr)
+		}
+
+		// Prevent things from logging if they weren't explicitly given a
+		// logger.
+		hclog.SetDefault(hclog.NewNullLogger())
+
+		// Create custom logger.
+		logr := hclog.New(&hclog.LoggerOptions{
+			Level:      level,
+			Output:     os.Stderr,
+			Mutex:      &sync.Mutex{},
+			TimeFormat: time.RFC3339,
+			Color:      hclog.ColorOff,
+		})
+
+		ctx := hclog.WithContext(c.Context, logr)
+		c.Context = ctx
+
+		return f(c, opts)
+	}
+}