internal/Magefile: Refactor to align with best practices

- Added mg import (via magefile/mage/sh)
- Added binaryName constant
- Added project descriptions for build targets
- Added proper Install target with go install
- Added Uninstall target to remove the binary
- Added getGOPATH helper function

1 files changed, 35 insertions, 1 deletions

diff --git a/Magefile.go b/Magefile.go
index 1664710..cfc9911 100644
--- a/Magefile.go
+++ b/Magefile.go
@@ -3,31 +3,65 @@
 package main
 
 import (
+	"fmt"
+	"os"
+	"path/filepath"
+
 	"github.com/magefile/mage/sh"
 )
 
+// Project description for build output
+const binaryName = "perc"
+
+// Default is the default target when no target is specified.
 var Default = Build
 
+// Build builds the perc binary.
 func Build() error {
-	return sh.RunV("go", "build", "-o", "perc", "./cmd/perc")
+	fmt.Println("Building perc...")
+	return sh.RunV("go", "build", "-o", binaryName, "./cmd/perc")
 }
 
+// Run runs the perc binary.
 func Run() error {
 	return sh.RunV("go", "run", "./cmd/perc")
 }
 
+// Test runs all tests.
 func Test() error {
+	fmt.Println("Running all tests...")
 	return sh.RunV("go", "test", "./...")
 }
 
+// TestRPN runs tests for the RPN package.
 func TestRPN() error {
+	fmt.Println("Running RPN tests...")
 	return sh.RunV("go", "test", "./internal/rpn/...")
 }
 
+// Install installs the perc binary to GOPATH/bin.
 func Install() error {
+	fmt.Println("Installing perc...")
 	return sh.RunV("go", "install", "./cmd/perc")
 }
 
+// Repl starts the REPL mode.
 func Repl() error {
 	return sh.RunV("go", "run", "./cmd/perc", "--repl")
 }
+
+// Uninstall removes the perc binary from GOPATH/bin.
+func Uninstall() error {
+	fmt.Println("Uninstalling perc...")
+	binPath := filepath.Join(getGOPATH(), "bin", binaryName)
+	return os.Remove(binPath)
+}
+
+// getGOPATH returns the GOPATH environment variable.
+func getGOPATH() string {
+	gopath := os.Getenv("GOPATH")
+	if gopath == "" {
+		gopath = filepath.Join(os.Getenv("HOME"), "go")
+	}
+	return gopath
+}