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package build
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import (
"bufio"
"os"
"path/filepath"
"git.akyoto.dev/cli/q/build/elf"
)
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// Build describes a compiler build.
type Build struct {
ExecutableName string
ExecutablePath string
WriteExecutable bool
}
// New creates a new build.
func New(directory string) (*Build, error) {
directory, err := filepath.Abs(directory)
if err != nil {
return nil, err
}
executableName := filepath.Base(directory)
build := &Build{
ExecutableName: executableName,
ExecutablePath: filepath.Join(directory, executableName),
WriteExecutable: true,
}
return build, nil
}
// Run parses the input files and generates an executable file.
func (build *Build) Run() error {
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if build.WriteExecutable {
sampleCode := []byte{
0xb8, 0x3c, 0x00, 0x00, 0x00, // mov rax, 60
0xbf, 0x00, 0x00, 0x00, 0x00, // mov rdi, 0
0x0f, 0x05, // syscall
}
return writeToDisk(build.ExecutablePath, sampleCode, nil)
}
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return nil
}
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// writeToDisk writes the executable file to disk.
func writeToDisk(filePath string, code []byte, data []byte) error {
file, err := os.Create(filePath)
if err != nil {
return err
}
buffer := bufio.NewWriter(file)
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executable := elf.New(code)
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executable.Write(buffer)
buffer.Flush()
err = file.Close()
if err != nil {
return err
}
return os.Chmod(filePath, 0755)
}