Implemented error messages

src/cli/Build.go

@@ -11,11 +11,12 @@ import (
 // Build builds an executable.
 func Build(args []string) int {
 	b := build.New()
+	writeExecutable := true
 
 	for i := 0; i < len(args); i++ {
 		switch args[i] {
 		case "--dry":
-			b.WriteExecutable = false
+			writeExecutable = false
 
 		case "--verbose", "-v":
 			config.Verbose = true
@@ -34,7 +35,20 @@ func Build(args []string) int {
 		b.Files = append(b.Files, ".")
 	}
 
-	err := b.Run()
+	result, err := b.Run()
+
+	if err != nil {
+		fmt.Println(err)
+		return 1
+	}
+
+	if !writeExecutable {
+		return 0
+	}
+
+	path := b.Executable()
+	code, data := build.Finalize(result)
+	err = build.Write(path, code, data)
 
 	if err != nil {
 		fmt.Println(err)

src/cli/Help.go

@@ -6,7 +6,7 @@ import "fmt"
 func Help(args []string) int {
 	fmt.Println("Usage: q [command] [options]")
 	fmt.Println("")
-	fmt.Println("    build [directory]")
+	fmt.Println("    build [directory] [file]")
 	fmt.Println("    system")
 	return 2
 }

src/cli/Main_test.go

@@ -1,8 +1,6 @@
 package cli_test
 
 import (
-	"fmt"
-	"os"
 	"testing"
 
 	"git.akyoto.dev/cli/q/src/cli"
@@ -19,17 +17,16 @@ func TestCLI(t *testing.T) {
 		{[]string{}, 2},
 		{[]string{"invalid"}, 2},
 		{[]string{"system"}, 0},
-		{[]string{"build", "non-existing-directory"}, 1},
-		{[]string{"build", "../../examples/hello/hello.q"}, 1},
+		{[]string{"build", "invalid-directory"}, 1},
+		{[]string{"build", "--invalid-parameter"}, 2},
 		{[]string{"build", "../../examples/hello", "--invalid"}, 2},
 		{[]string{"build", "../../examples/hello", "--dry"}, 0},
 		{[]string{"build", "../../examples/hello", "--dry", "--verbose"}, 0},
+		{[]string{"build", "../../examples/hello/hello.q", "--dry"}, 0},
 	}
 
 	for _, test := range tests {
 		t.Log(test.arguments)
-		directory, _ := os.Getwd()
-		fmt.Println(directory)
 		exitCode := cli.Main(test.arguments)
 		assert.Equal(t, exitCode, test.expectedExitCode)
 	}