bootdeploy: copy implementation from cmd/mkinitfs

internal/bootdeploy/bootdeploy.go

@@ -1,6 +1,16 @@
 package bootdeploy
 
-import ()
+import (
+	"errors"
+	"io"
+	"log"
+	"os"
+	"os/exec"
+	"path/filepath"
+	"strings"
+
+	"gitlab.com/postmarketOS/postmarketos-mkinitfs/internal/misc"
+)
 
 type BootDeploy struct {
 	inDir          string
@@ -25,5 +35,112 @@ func New(inDir, outDir, ubootBoardname string) *BootDeploy {
 
 func (b *BootDeploy) Run() error {
 
+	if err := copyUbootFiles(b.inDir, b.ubootBoardname); errors.Is(err, os.ErrNotExist) {
+		log.Println("u-boot files copying skipped: ", err)
+	} else {
+		if err != nil {
+			log.Fatal("copyUbootFiles: ", err)
+		}
+	}
+
+	return bootDeploy(b.inDir, b.outDir)
+}
+
+func bootDeploy(workDir string, outDir string) error {
+	// boot-deploy expects the kernel to be in the same dir as initramfs.
+	// Assume that the kernel is in the output dir...
+	kernels, _ := filepath.Glob(filepath.Join(outDir, "vmlinuz*"))
+	if len(kernels) == 0 {
+		return errors.New("Unable to find any kernels at " + filepath.Join(outDir, "vmlinuz*"))
+	}
+
+	// Pick a kernel that does not have suffixes added by boot-deploy
+	var kernFile string
+	for _, f := range kernels {
+		if strings.HasSuffix(f, "-dtb") || strings.HasSuffix(f, "-mtk") {
+			continue
+		}
+		kernFile = f
+		break
+	}
+
+	kernFd, err := os.Open(kernFile)
+	if err != nil {
+		return err
+	}
+	defer kernFd.Close()
+
+	kernFileCopy, err := os.Create(filepath.Join(workDir, "vmlinuz"))
+	if err != nil {
+		return err
+	}
+
+	if _, err = io.Copy(kernFileCopy, kernFd); err != nil {
+		return err
+	}
+	kernFileCopy.Close()
+
+	// boot-deploy -i initramfs -k vmlinuz-postmarketos-rockchip -d /tmp/cpio -o /tmp/foo initramfs-extra
+	cmd := exec.Command("boot-deploy",
+		"-i", "initramfs",
+		"-k", "vmlinuz",
+		"-d", workDir,
+		"-o", outDir,
+		"initramfs-extra")
+	if !misc.Exists(cmd.Path) {
+		return errors.New("boot-deploy command not found")
+	}
+
+	cmd.Stdout = os.Stdout
+	cmd.Stderr = os.Stderr
+	if err := cmd.Run(); err != nil {
+		log.Print("'boot-deploy' command failed")
+		return err
+	}
+
+	return nil
+}
+
+func copy(srcFile, dstFile string) error {
+	out, err := os.Create(dstFile)
+	if err != nil {
+		return err
+	}
+
+	defer out.Close()
+
+	in, err := os.Open(srcFile)
+	if err != nil {
+		return err
+	}
+	defer in.Close()
+
+	_, err = io.Copy(out, in)
+	if err != nil {
+		return err
+	}
+
+	return nil
+}
+
+func copyUbootFiles(path, ubootBoardname string) error {
+	if ubootBoardname == "" {
+		return nil
+	}
+
+	srcDir := filepath.Join("/usr/share/u-boot", ubootBoardname)
+	entries, err := os.ReadDir(srcDir)
+	if err != nil {
+		return err
+	}
+	for _, entry := range entries {
+		sourcePath := filepath.Join(srcDir, entry.Name())
+		destPath := filepath.Join(path, entry.Name())
+
+		if err := copy(sourcePath, destPath); err != nil {
+			return err
+		}
+	}
+
 	return nil
 }