Initial commit

src/cli/Exec.go

@@ -0,0 +1,22 @@
+package cli
+
+// Exec runs the command included in the first argument and returns the exit code.
+func Exec(args []string) int {
+	if len(args) == 0 {
+		return invalid()
+	}
+
+	switch args[0] {
+	case "build":
+		return build(args[1:])
+
+	case "run":
+		return run(args[1:])
+
+	case "help":
+		return help()
+
+	default:
+		return invalid()
+	}
+}

src/cli/Exec_test.go

@@ -0,0 +1,16 @@
+package cli_test
+
+import (
+	"testing"
+
+	"git.urbach.dev/cli/q/src/cli"
+	"git.urbach.dev/go/assert"
+)
+
+func TestExec(t *testing.T) {
+	assert.Equal(t, cli.Exec(nil), 2)
+	assert.Equal(t, cli.Exec([]string{"_"}), 2)
+	assert.Equal(t, cli.Exec([]string{"build"}), 0)
+	assert.Equal(t, cli.Exec([]string{"run"}), 0)
+	assert.Equal(t, cli.Exec([]string{"help"}), 0)
+}

src/cli/build.go

@@ -0,0 +1,6 @@
+package cli
+
+// build parses the arguments and creates a build.
+func build(args []string) int {
+	return 0
+}

src/cli/help.go

@@ -0,0 +1,16 @@
+package cli
+
+import (
+	_ "embed"
+	"fmt"
+	"os"
+)
+
+//go:embed help.txt
+var helpText string
+
+// help shows the command line argument usage.
+func help() int {
+	fmt.Fprintln(os.Stdout, helpText)
+	return 0
+}

src/cli/help.txt

@@ -0,0 +1,9 @@
+Usage:
+
+    q [command] [options]
+
+Commands:
+
+    build [directory | file]       build an executable
+    run [directory | file]         build and run the executable
+    help                           show this help

src/cli/invalid.go

@@ -0,0 +1,12 @@
+package cli
+
+import (
+	"fmt"
+	"os"
+)
+
+// invalid shows the help and returns exit code 2 (invalid parameters).
+func invalid() int {
+	fmt.Fprintln(os.Stderr, helpText)
+	return 2
+}

src/cli/run.go

@@ -0,0 +1,6 @@
+package cli
+
+// run builds and runs the executable.
+func run(args []string) int {
+	return 0
+}