refactor: use urfave/cli

3 files changed, 39 insertions, 20 deletions

diff --git a/go.mod b/go.mod
index 1644bda..5413fce 100644
--- a/go.mod
+++ b/go.mod
@@ -4,6 +4,10 @@ go 1.25.4
 
 require (
 	github.com/fatih/color v1.18.0 // direct
+	github.com/urfave/cli/v3 v3.6.0 // direct
+)
+
+require (
 	github.com/mattn/go-colorable v0.1.13 // indirect
 	github.com/mattn/go-isatty v0.0.20 // indirect
 	golang.org/x/sys v0.25.0 // indirect
diff --git a/go.sum b/go.sum
index 33148a4..c90ae44 100644
--- a/go.sum
+++ b/go.sum
@@ -1,3 +1,5 @@
+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 v1.18.0 h1:S8gINlzdQ840/4pfAwic/ZE0djQEH3wM94VfqLTZcOM=
 github.com/fatih/color v1.18.0/go.mod h1:4FelSpRwEGDpQ12mAdzqdOukCy4u8WUtOY6lkT/6HfU=
 github.com/mattn/go-colorable v0.1.13 h1:fFA4WZxdEF4tXPZVKMLwD8oUnCTTo08duU7wxecdEvA=
@@ -5,7 +7,15 @@ github.com/mattn/go-colorable v0.1.13/go.mod h1:7S9/ev0klgBDR4GtXTXX8a3vIGJpMovk
 github.com/mattn/go-isatty v0.0.16/go.mod h1:kYGgaQfpe5nmfYZH+SKPsOc2e4SrIfOl2e/yFXSvRLM=
 github.com/mattn/go-isatty v0.0.20 h1:xfD0iDuEKnDkl03q4limB+vH+GxLEtL/jb4xVJSWWEY=
 github.com/mattn/go-isatty v0.0.20/go.mod h1:W+V8PltTTMOvKvAeJH7IuucS94S2C6jfK/D7dTCTo3Y=
+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/testify v1.11.1 h1:7s2iGBzp5EwR7/aIZr8ao5+dra3wiQyKjjFuvgVKu7U=
+github.com/stretchr/testify v1.11.1/go.mod h1:wZwfW3scLgRK+23gO65QZefKpKQRnfz6sD981Nm4B6U=
+github.com/urfave/cli/v3 v3.6.0 h1:oIdArVjkdIXHWg3iqxgmqwQGC8NM0JtdgwQAj2sRwFo=
+github.com/urfave/cli/v3 v3.6.0/go.mod h1:ysVLtOEmg2tOy6PknnYVhDoouyC/6N42TMeoMzskhso=
 golang.org/x/sys v0.0.0-20220811171246-fbc7d0a398ab/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.6.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.25.0 h1:r+8e+loiHxRqhXVl6ML1nO3l1+oFoWbnlu2Ehimmi34=
 golang.org/x/sys v0.25.0/go.mod h1:/VUhepiaJMQUp4+oa/7Zr1D23ma6VTLIYjOOTFZPUcA=
+gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=
+gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
diff --git a/main.go b/main.go
index d986749..ca60c40 100644
--- a/main.go
+++ b/main.go
@@ -4,7 +4,10 @@ import (
     "fmt"
     "os"
     "os/exec"
+    "context"
+    "log"
     "github.com/fatih/color"
+    "github.com/urfave/cli/v3"
 )
 
 func main() {
@@ -12,28 +15,30 @@ func main() {
     _, brewInstallationErr := exec.LookPath("brew")
     if brewInstallationErr != nil {
         color.Red("🍺 Homebrew not installed.")
-        fmt.Println("This tool is for looking up formulae/cask information about packages installed with Homebrew. If you don't have Homebrew, it's no use.")
-        os.Exit(1)
+        fmt.Println("This tool is for looking up formulae/cask information about packages installed with Homebrew.")
+        fmt.Println("If you don't have Homebrew, it's no use.")
+        os.Exit(0)
     }
 
-	args := os.Args
-	// handle arguments
-	var printUsage = func() {
-		color.New(color.FgBlue).Print("Usage: ")
-        fmt.Print("wthis <package>\n")
-	}
-    if len(args) < 2 {
-        printUsage()
-        os.Exit(1)
-    }
-    if args[1] == "-h" || args[1] == "--help" {
-    	printUsage()
-        os.Exit(0)
+    // declare CLI app
+    cmd := &cli.Command{
+        Name:  "wthis",
+        Usage: "Fetch information of a Homebrew formulae or cask, like how it got installed, reverse dependencies, etc.",
+        Action: func(ctx context.Context, cmd *cli.Command) error {
+        	if cmd.Args().Len() == 0 {
+        		color.Red("❌ Please provide a formulae/cask name.")
+          		fmt.Println("Usage: wthis <name>")
+        		return nil
+        	}
+        	pkgName := cmd.Args().First()
+         	formulae, cask := GetInfo(pkgName)
+          	PrintInfo(formulae, cask, pkgName)
+            return nil
+        },
     }
-    pkg := args[1]
 
-    // get formulae/cask info
-    formulae, cask := GetInfo(pkg)
-    // print info
-    PrintInfo(formulae, cask, pkg)
+    // run command and handle error
+    if err := cmd.Run(context.Background(), os.Args); err != nil {
+        log.Fatal(err)
+    }
 }