Added file scanner

go.mod

@@ -1,3 +1,5 @@
 module git.akyoto.dev/cli/q
 
 go 1.21
+
+require git.akyoto.dev/go/assert v0.1.3

go.sum

@@ -0,0 +1,2 @@
+git.akyoto.dev/go/assert v0.1.3 h1:QwCUbmG4aZYsNk/OuRBz1zWVKmGlDUHhOnnDBfn8Qw8=
+git.akyoto.dev/go/assert v0.1.3/go.mod h1:0GzMaM0eURuDwtGkJJkCsI7r2aUKr+5GmWNTFPgDocM=

main_test.go

@@ -7,6 +7,7 @@ import (
 
 	"git.akyoto.dev/cli/q/src/cli"
 	"git.akyoto.dev/cli/q/src/log"
+	"git.akyoto.dev/go/assert"
 )
 
 func TestMain(m *testing.M) {
@@ -29,16 +30,13 @@ func TestCLI(t *testing.T) {
 		{[]string{"build", "examples/hello/hello.q"}, 1},
 		{[]string{"build", "examples/hello", "--invalid"}, 2},
 		{[]string{"build", "examples/hello", "--dry"}, 0},
+		{[]string{"build", "examples/hello", "--dry", "--verbose"}, 0},
 	}
 
 	for _, test := range tests {
 		t.Log(test.arguments)
 		exitCode := cli.Main(test.arguments)
-
-		if exitCode != test.expectedExitCode {
-			t.Errorf("exit code %d (expected %d)", exitCode, test.expectedExitCode)
-			t.FailNow()
-		}
+		assert.Equal(t, exitCode, test.expectedExitCode)
 	}
 }
 

src/asm/Address.go

@@ -2,6 +2,3 @@ package asm
 
 // Address represents a memory address.
 type Address = uint32
-
-// Index references an instruction by its position.
-// type Index = uint32

src/asm/Assembler.go

@@ -12,20 +12,17 @@ import (
 // Assembler contains a list of instructions.
 type Assembler struct {
 	Instructions []Instruction
-	// labels       map[string]Index
-	Verbose bool
 }
 
 // New creates a new assembler.
 func New() *Assembler {
 	return &Assembler{
 		Instructions: make([]Instruction, 0, 8),
-		// labels:       map[string]Index{},
 	}
 }
 
 // Finalize generates the final machine code.
-func (a *Assembler) Finalize() ([]byte, []byte) {
+func (a *Assembler) Finalize(verbose bool) ([]byte, []byte) {
 	code := make([]byte, 0, len(a.Instructions)*8)
 	data := make(Data, 0, 16)
 	pointers := []Pointer{}
@@ -46,8 +43,10 @@ func (a *Assembler) Finalize() ([]byte, []byte) {
 		case SYSCALL:
 			code = x64.Syscall(code)
 		}
+	}
 
-		if a.Verbose {
+	if verbose {
+		for _, x := range a.Instructions {
 			log.Info.Println(x.String())
 		}
 	}
@@ -63,11 +62,6 @@ func (a *Assembler) Finalize() ([]byte, []byte) {
 	return code, data
 }
 
-// AddLabel creates a new label at the current position.
-// func (a *Assembler) AddLabel(name string) {
-// 	a.labels[name] = Index(len(a.instructions))
-// }
-
 // MoveRegisterData moves a data section address into the given register.
 func (a *Assembler) MoveRegisterData(reg register.ID, data []byte) {
 	a.Instructions = append(a.Instructions, Instruction{

src/asm/Assembler_test.go

@@ -0,0 +1,41 @@
+package asm_test
+
+import (
+	"testing"
+
+	"git.akyoto.dev/cli/q/src/asm"
+	"git.akyoto.dev/cli/q/src/linux"
+	"git.akyoto.dev/cli/q/src/register"
+	"git.akyoto.dev/go/assert"
+)
+
+func TestHello(t *testing.T) {
+	a := asm.New()
+
+	hello := []byte("Hello\n")
+	a.MoveRegisterNumber(register.Syscall0, linux.Write)
+	a.MoveRegisterNumber(register.Syscall1, 1)
+	a.MoveRegisterData(register.Syscall2, hello)
+	a.MoveRegisterNumber(register.Syscall3, uint64(len(hello)))
+	a.Syscall()
+
+	a.MoveRegisterNumber(register.Syscall0, linux.Exit)
+	a.MoveRegisterNumber(register.Syscall1, 0)
+	a.Syscall()
+
+	code, data := a.Finalize(false)
+
+	assert.DeepEqual(t, code, []byte{
+		0xb8, 0x01, 0x00, 0x00, 0x00,
+		0xbf, 0x01, 0x00, 0x00, 0x00,
+		0xbe, 0xa2, 0x00, 0x40, 0x00,
+		0xba, 0x06, 0x00, 0x00, 0x00,
+		0x0f, 0x05,
+
+		0xb8, 0x3c, 0x00, 0x00, 0x00,
+		0xbf, 0x00, 0x00, 0x00, 0x00,
+		0x0f, 0x05,
+	})
+
+	assert.DeepEqual(t, data, hello)
+}

src/build/Build.go

@@ -4,10 +4,8 @@ import (
 	"bufio"
 	"os"
 	"path/filepath"
-	"strings"
 
 	"git.akyoto.dev/cli/q/src/asm"
-	"git.akyoto.dev/cli/q/src/directory"
 	"git.akyoto.dev/cli/q/src/elf"
 	"git.akyoto.dev/cli/q/src/errors"
 	"git.akyoto.dev/cli/q/src/linux"
@@ -30,42 +28,14 @@ func New(directory string) *Build {
 	}
 }
 
-var (
-	hello = []byte("Hello\n")
-	world = []byte("World\n")
-)
-
 // Run parses the input files and generates an executable file.
 func (build *Build) Run() error {
-	// err := build.Compile()
+	code, data, err := build.Compile()
 
-	// if err != nil {
-	// 	return err
-	// }
-
-	a := asm.Assembler{
-		Instructions: make([]asm.Instruction, 0, 8),
-		Verbose:      build.Verbose,
+	if err != nil {
+		return err
 	}
 
-	a.MoveRegisterNumber(register.Syscall0, linux.Write)
-	a.MoveRegisterNumber(register.Syscall1, 1)
-	a.MoveRegisterData(register.Syscall2, hello)
-	a.MoveRegisterNumber(register.Syscall3, uint64(len(hello)))
-	a.Syscall()
-
-	a.MoveRegisterNumber(register.Syscall0, linux.Write)
-	a.MoveRegisterNumber(register.Syscall1, 1)
-	a.MoveRegisterData(register.Syscall2, world)
-	a.MoveRegisterNumber(register.Syscall3, uint64(len(world)))
-	a.Syscall()
-
-	a.MoveRegisterNumber(register.Syscall0, linux.Exit)
-	a.MoveRegisterNumber(register.Syscall1, 0)
-	a.Syscall()
-
-	code, data := a.Finalize()
-
 	if !build.WriteExecutable {
 		return nil
 	}
@@ -74,26 +44,54 @@ func (build *Build) Run() error {
 }
 
 // Compile compiles all the functions.
-func (build *Build) Compile() error {
+func (build *Build) Compile() ([]byte, []byte, error) {
 	stat, err := os.Stat(build.Directory)
 
 	if err != nil {
-		return err
+		return nil, nil, err
 	}
 
 	if !stat.IsDir() {
-		return &errors.InvalidDirectory{Path: build.Directory}
+		return nil, nil, &errors.InvalidDirectory{Path: build.Directory}
 	}
 
-	directory.Walk(build.Directory, func(file string) {
-		if !strings.HasSuffix(file, ".q") {
-			return
+	functions, errors := Scan(build.Directory)
+
+	for functions != nil || errors != nil {
+		select {
+		case err, ok := <-errors:
+			if !ok {
+				errors = nil
+				continue
+			}
+
+			log.Info.Println(err)
+
+		case function, ok := <-functions:
+			if !ok {
+				functions = nil
+				continue
+			}
+
+			log.Info.Println(function)
 		}
+	}
 
-		log.Info.Println(file)
-	})
+	a := asm.New()
 
-	return nil
+	hello := []byte("Hello\n")
+	a.MoveRegisterNumber(register.Syscall0, linux.Write)
+	a.MoveRegisterNumber(register.Syscall1, 1)
+	a.MoveRegisterData(register.Syscall2, hello)
+	a.MoveRegisterNumber(register.Syscall3, uint64(len(hello)))
+	a.Syscall()
+
+	a.MoveRegisterNumber(register.Syscall0, linux.Exit)
+	a.MoveRegisterNumber(register.Syscall1, 0)
+	a.Syscall()
+
+	code, data := a.Finalize(build.Verbose)
+	return code, data, nil
 }
 
 // Executable returns the path to the executable.

src/build/Function.go

@@ -0,0 +1,3 @@
+package build
+
+type Function struct{}

src/build/Scan.go

@@ -0,0 +1,63 @@
+package build
+
+import (
+	"os"
+	"path/filepath"
+	"strings"
+	"sync"
+
+	"git.akyoto.dev/cli/q/src/directory"
+	"git.akyoto.dev/cli/q/src/log"
+)
+
+// Scan scans the directory.
+func Scan(path string) (<-chan *Function, <-chan error) {
+	functions := make(chan *Function, 16)
+	errors := make(chan error)
+
+	go func() {
+		scanDirectory(path, functions, errors)
+		close(functions)
+		close(errors)
+	}()
+
+	return functions, errors
+}
+
+// scanDirectory scans the directory without channel allocations.
+func scanDirectory(path string, functions chan<- *Function, errors chan<- error) {
+	wg := sync.WaitGroup{}
+
+	directory.Walk(path, func(name string) {
+		if !strings.HasSuffix(name, ".q") {
+			return
+		}
+
+		fullPath := filepath.Join(path, name)
+		wg.Add(1)
+
+		go func() {
+			defer wg.Done()
+			err := scanFile(fullPath, functions)
+
+			if err != nil {
+				errors <- err
+			}
+		}()
+	})
+
+	wg.Wait()
+}
+
+// scanFile scans a single file.
+func scanFile(path string, functions chan<- *Function) error {
+	log.Info.Println(path)
+	contents, err := os.ReadFile(path)
+
+	if err != nil {
+		return err
+	}
+
+	log.Info.Println(string(contents))
+	return nil
+}

src/cli/Build.go

@@ -1,21 +1,18 @@
 package cli
 
 import (
+	"path/filepath"
+	"strings"
+
 	"git.akyoto.dev/cli/q/src/build"
 	"git.akyoto.dev/cli/q/src/log"
 )
 
 // Build builds an executable.
 func Build(args []string) int {
-	directory := "."
+	b := build.New(".")
 
-	if len(args) > 0 {
-		directory = args[0]
-	}
-
-	b := build.New(directory)
-
-	for i := 1; i < len(args); i++ {
+	for i := 0; i < len(args); i++ {
 		switch args[i] {
 		case "--dry":
 			b.WriteExecutable = false
@@ -24,12 +21,24 @@ func Build(args []string) int {
 			b.Verbose = true
 
 		default:
-			log.Error.Printf("Unknown parameter: %s\n", args[i])
-			return 2
+			if strings.HasPrefix(args[i], "-") {
+				log.Error.Printf("Unknown parameter: %s\n", args[i])
+				return 2
+			}
+
+			b.Directory = args[i]
 		}
 	}
 
-	err := b.Run()
+	fullPath, err := filepath.Abs(b.Directory)
+
+	if err != nil {
+		log.Error.Println(err)
+		return 1
+	}
+
+	b.Directory = fullPath
+	err = b.Run()
 
 	if err != nil {
 		log.Error.Println(err)