feat: flags from gofmt

cmd/gofimports/main.go

@@ -0,0 +1,7 @@
+package main
+
+import "github.com/haunt98/gofimports/internal/cli"
+
+func main() {
+	cli.NewApp().Run()
+}

go.mod

@@ -1,3 +1,18 @@
 module github.com/haunt98/gofimports
 
 go 1.19
+
+require (
+	github.com/make-go-great/color-go v0.4.1
+	github.com/urfave/cli/v2 v2.23.5
+)
+
+require (
+	github.com/cpuguy83/go-md2man/v2 v2.0.2 // indirect
+	github.com/fatih/color v1.13.0 // indirect
+	github.com/mattn/go-colorable v0.1.9 // indirect
+	github.com/mattn/go-isatty v0.0.14 // indirect
+	github.com/russross/blackfriday/v2 v2.1.0 // indirect
+	github.com/xrash/smetrics v0.0.0-20201216005158-039620a65673 // indirect
+	golang.org/x/sys v0.0.0-20210630005230-0f9fa26af87c // indirect
+)

go.sum

@@ -0,0 +1,21 @@
+github.com/cpuguy83/go-md2man/v2 v2.0.2 h1:p1EgwI/C7NhT0JmVkwCD2ZBK8j4aeHQX2pMHHBfMQ6w=
+github.com/cpuguy83/go-md2man/v2 v2.0.2/go.mod h1:tgQtvFlXSQOSOSIRvRPT7W67SCa46tRHOmNcaadrF8o=
+github.com/fatih/color v1.13.0 h1:8LOYc1KYPPmyKMuN8QV2DNRWNbLo6LZ0iLs8+mlH53w=
+github.com/fatih/color v1.13.0/go.mod h1:kLAiJbzzSOZDVNGyDpeOxJ47H46qBXwg5ILebYFFOfk=
+github.com/make-go-great/color-go v0.4.1 h1:4HIat5r1oQneu5BSDUjHKN/9x4Ay2qEEkswdOgk/VRY=
+github.com/make-go-great/color-go v0.4.1/go.mod h1:G5G8IJ3PUo+vSQ+UvnfaswF8O/piVIhFJKv1mQjBGpI=
+github.com/mattn/go-colorable v0.1.9 h1:sqDoxXbdeALODt0DAeJCVp38ps9ZogZEAXjus69YV3U=
+github.com/mattn/go-colorable v0.1.9/go.mod h1:u6P/XSegPjTcexA+o6vUJrdnUu04hMope9wVRipJSqc=
+github.com/mattn/go-isatty v0.0.12/go.mod h1:cbi8OIDigv2wuxKPP5vlRcQ1OAZbq2CE4Kysco4FUpU=
+github.com/mattn/go-isatty v0.0.14 h1:yVuAays6BHfxijgZPzw+3Zlu5yQgKGP2/hcQbHb7S9Y=
+github.com/mattn/go-isatty v0.0.14/go.mod h1:7GGIvUiUoEMVVmxf/4nioHXj79iQHKdU27kJ6hsGG94=
+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/urfave/cli/v2 v2.23.5 h1:xbrU7tAYviSpqeR3X4nEFWUdB/uDZ6DE+HxmRU7Xtyw=
+github.com/urfave/cli/v2 v2.23.5/go.mod h1:GHupkWPMM0M/sj1a2b4wUrWBPzazNrIjouW6fmdJLxc=
+github.com/xrash/smetrics v0.0.0-20201216005158-039620a65673 h1:bAn7/zixMGCfxrRTfdpNzjtPYqr8smhKouy9mxVdGPU=
+github.com/xrash/smetrics v0.0.0-20201216005158-039620a65673/go.mod h1:N3UwUGtsrSj3ccvlPHLoLsHnpR27oXr4ZE984MbSER8=
+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 v0.0.0-20210630005230-0f9fa26af87c h1:F1jZWGFhYfh0Ci55sIpILtKKK8p3i2/krTr0H1rg74I=
+golang.org/x/sys v0.0.0-20210630005230-0f9fa26af87c/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=

internal/cli/action.go

@@ -0,0 +1,38 @@
+package cli
+
+import (
+	"fmt"
+
+	"github.com/urfave/cli/v2"
+)
+
+type action struct {
+	flags struct {
+		list  bool
+		write bool
+		diff  bool
+	}
+}
+
+func (a *action) RunHelp(c *cli.Context) error {
+	return cli.ShowAppHelp(c)
+}
+
+func (a *action) getFlags(c *cli.Context) {
+	a.flags.list = c.Bool(flagListName)
+	a.flags.write = c.Bool(flagWriteName)
+	a.flags.diff = c.Bool(flagDiffName)
+}
+
+func (a *action) Run(c *cli.Context) error {
+	a.getFlags(c)
+
+	if !a.flags.write &&
+		!a.flags.diff {
+		a.RunHelp(c)
+		fmt.Println("Error: -w or -d must required one")
+		return nil
+	}
+
+	return nil
+}

internal/cli/app.go

@@ -0,0 +1,72 @@
+package cli
+
+import (
+	"os"
+
+	"github.com/make-go-great/color-go"
+	"github.com/urfave/cli/v2"
+)
+
+const (
+	name  = "gofimports"
+	usage = "goimports with my opinionated preferences"
+
+	// Inspiration from gofmt flags
+	flagListName  = "list"
+	flagListUsage = "list files will be changed"
+
+	flagWriteName  = "write"
+	flagWriteUsage = "actually write changes to (source) files"
+
+	// If both write and diff is exist
+	// Choose diff
+	flagDiffName  = "diff"
+	flagDiffUsage = "show diff instead of writing changes"
+)
+
+var (
+	flagListAliases  = []string{"l"}
+	flagWriteAliases = []string{"w"}
+	flagDiffAliases  = []string{"d"}
+)
+
+type App struct {
+	cliApp *cli.App
+}
+
+func NewApp() *App {
+	a := &action{}
+
+	cliApp := &cli.App{
+		Name:  name,
+		Usage: usage,
+		Flags: []cli.Flag{
+			&cli.BoolFlag{
+				Name:    flagListName,
+				Usage:   flagListUsage,
+				Aliases: flagListAliases,
+			},
+			&cli.BoolFlag{
+				Name:    flagWriteName,
+				Usage:   flagWriteUsage,
+				Aliases: flagWriteAliases,
+			},
+			&cli.BoolFlag{
+				Name:    flagDiffName,
+				Usage:   flagDiffUsage,
+				Aliases: flagDiffAliases,
+			},
+		},
+		Action: a.Run,
+	}
+
+	return &App{
+		cliApp: cliApp,
+	}
+}
+
+func (a *App) Run() {
+	if err := a.cliApp.Run(os.Args); err != nil {
+		color.PrintAppError(name, err.Error())
+	}
+}