Added compiler and scanner packages

src/build/Build.go

@@ -10,6 +10,7 @@ type Build struct {
 	Files []string
 	Arch  Arch
 	OS    OS
+	Dry   bool
 }
 
 // Executable returns the path to the executable.

src/cli/Exec.go

@@ -8,7 +8,7 @@ func Exec(args []string) int {
 
 	switch args[0] {
 	case "build":
-		return build(args[1:])
+		return _build(args[1:])
 
 	case "run":
 		return run(args[1:])

src/cli/Exec_test.go

@@ -11,6 +11,15 @@ 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{"build", "--invalid-parameter"}), 2)
+	assert.Equal(t, cli.Exec([]string{"build", "../../examples/hello", "--invalid-parameter"}), 2)
+	assert.Equal(t, cli.Exec([]string{"build", "../../examples/hello", "--dry"}), 0)
+	assert.Equal(t, cli.Exec([]string{"build", "../../examples/hello", "--dry", "--os", "linux"}), 0)
+	assert.Equal(t, cli.Exec([]string{"build", "../../examples/hello", "--dry", "--os", "mac"}), 0)
+	assert.Equal(t, cli.Exec([]string{"build", "../../examples/hello", "--dry", "--os", "windows"}), 0)
+	assert.Equal(t, cli.Exec([]string{"build", "../../examples/hello", "--dry", "--arch", "arm"}), 0)
+	assert.Equal(t, cli.Exec([]string{"build", "../../examples/hello", "--dry", "--arch", "x86"}), 0)
+	assert.Equal(t, cli.Exec([]string{"build", "../../examples/hello/hello.q", "--dry"}), 0)
 	assert.Equal(t, cli.Exec([]string{"help"}), 0)
+	assert.Equal(t, cli.Exec([]string{"run"}), 0)
 }

src/cli/build.go

@@ -1,6 +1,94 @@
 package cli
 
-// build parses the arguments and creates a build.
-func build(args []string) int {
+import (
+	"runtime"
+	"strings"
+
+	"git.urbach.dev/cli/q/src/build"
+	"git.urbach.dev/cli/q/src/compiler"
+	"git.urbach.dev/cli/q/src/scanner"
+)
+
+// _build parses the arguments and creates a build.
+func _build(args []string) int {
+	b, err := newBuildFromArgs(args)
+
+	if err != nil {
+		return exit(err)
+	}
+
+	_, err = compiler.Compile(scanner.Scan(b))
+
+	if err != nil {
+		return exit(err)
+	}
+
 	return 0
 }
+
+// newBuildFromArgs creates a new build with the given arguments.
+func newBuildFromArgs(args []string) (*build.Build, error) {
+	b := build.New()
+
+	for i := 0; i < len(args); i++ {
+		switch args[i] {
+		case "--arch":
+			i++
+
+			if i >= len(args) {
+				return b, &expectedParameterError{Parameter: "arch"}
+			}
+
+			switch args[i] {
+			case "arm":
+				b.Arch = build.ARM
+			case "x86":
+				b.Arch = build.X86
+			default:
+				return b, &invalidValueError{Value: args[i], Parameter: "arch"}
+			}
+
+		case "--dry":
+			b.Dry = true
+
+		case "--os":
+			i++
+
+			if i >= len(args) {
+				return b, &expectedParameterError{Parameter: "os"}
+			}
+
+			switch args[i] {
+			case "linux":
+				b.OS = build.Linux
+			case "mac":
+				b.OS = build.Mac
+			case "windows":
+				b.OS = build.Windows
+			default:
+				return b, &invalidValueError{Value: args[i], Parameter: "os"}
+			}
+
+		default:
+			if strings.HasPrefix(args[i], "-") {
+				return b, &unknownParameterError{Parameter: args[i]}
+			}
+
+			b.Files = append(b.Files, args[i])
+		}
+	}
+
+	if b.OS == build.UnknownOS {
+		return b, &invalidValueError{Value: runtime.GOOS, Parameter: "os"}
+	}
+
+	if b.Arch == build.UnknownArch {
+		return b, &invalidValueError{Value: runtime.GOARCH, Parameter: "arch"}
+	}
+
+	if len(b.Files) == 0 {
+		b.Files = append(b.Files, ".")
+	}
+
+	return b, nil
+}

src/cli/errors.go

@@ -0,0 +1,34 @@
+package cli
+
+import "fmt"
+
+// expectedParameterError is created when a command line parameter is missing.
+type expectedParameterError struct {
+	Parameter string
+}
+
+// Error implements the error interface.
+func (err *expectedParameterError) Error() string {
+	return fmt.Sprintf("Expected parameter '%s'", err.Parameter)
+}
+
+// invalidValueError is created when a parameter has an invalid value.
+type invalidValueError struct {
+	Value     string
+	Parameter string
+}
+
+// Error implements the error interface.
+func (err *invalidValueError) Error() string {
+	return fmt.Sprintf("Invalid value '%s' for parameter '%s'", err.Value, err.Parameter)
+}
+
+// unknownParameterError is created when a command line parameter is not recognized.
+type unknownParameterError struct {
+	Parameter string
+}
+
+// Error implements the error interface.
+func (err *unknownParameterError) Error() string {
+	return fmt.Sprintf("Unknown parameter '%s'", err.Parameter)
+}

src/cli/exit.go

@@ -0,0 +1,30 @@
+package cli
+
+import (
+	"errors"
+	"fmt"
+	"os"
+	"os/exec"
+)
+
+// exit returns the exit code depending on the error type.
+func exit(err error) int {
+	fmt.Fprintln(os.Stderr, err)
+
+	var (
+		exit              *exec.ExitError
+		expectedParameter *expectedParameterError
+		unknownParameter  *unknownParameterError
+		invalidValue      *invalidValueError
+	)
+
+	if errors.As(err, &exit) {
+		return exit.ExitCode()
+	}
+
+	if errors.As(err, &expectedParameter) || errors.As(err, &unknownParameter) || errors.As(err, &invalidValue) {
+		return 2
+	}
+
+	return 1
+}

src/compiler/Compile.go

@@ -0,0 +1,8 @@
+package compiler
+
+import "git.urbach.dev/cli/q/src/scanner"
+
+// Compile waits for the scan to finish and compiles all functions.
+func Compile(scan scanner.Result) (Result, error) {
+	return Result{}, nil
+}

src/compiler/Compile_test.go

@@ -0,0 +1,16 @@
+package compiler_test
+
+import (
+	"testing"
+
+	"git.urbach.dev/cli/q/src/build"
+	"git.urbach.dev/cli/q/src/compiler"
+	"git.urbach.dev/cli/q/src/scanner"
+	"git.urbach.dev/go/assert"
+)
+
+func TestCompile(t *testing.T) {
+	b := build.New("../../examples/hello")
+	_, err := compiler.Compile(scanner.Scan(b))
+	assert.Nil(t, err)
+}

src/compiler/Result.go

@@ -0,0 +1,4 @@
+package compiler
+
+// Result contains everything we need to write an executable file to disk.
+type Result struct{}

src/scanner/Result.go

@@ -0,0 +1,4 @@
+package scanner
+
+// Result contains everything the compiler needs to start a build.
+type Result struct{}

src/scanner/Scan.go

@@ -0,0 +1,10 @@
+package scanner
+
+import (
+	"git.urbach.dev/cli/q/src/build"
+)
+
+// Scan scans all the files included in the build.
+func Scan(b *build.Build) Result {
+	return Result{}
+}

src/scanner/Scan_test.go

@@ -0,0 +1,13 @@
+package scanner_test
+
+import (
+	"testing"
+
+	"git.urbach.dev/cli/q/src/build"
+	"git.urbach.dev/cli/q/src/scanner"
+)
+
+func TestScan(t *testing.T) {
+	b := build.New("../../examples/hello")
+	scanner.Scan(b)
+}