add compile-time flag to disable Go GC (MR 56)

I hate this, but it's the only good way I could find to allow working around this ugly QEMU bug:
https://gitlab.com/qemu-project/qemu/-/issues/2560

Makefile

@@ -13,6 +13,11 @@ GOFLAGS?=
 LDFLAGS+=-s -w -X main.Version=$(VERSION)
 RM?=rm -f
 GOTEST=go test -count=1 -race
+DISABLE_GOGC?=
+
+ifeq ($(DISABLE_GOGC),1)
+	LDFLAGS+=-X main.DisableGC=true
+endif
 
 GOSRC!=find * -name '*.go'
 GOSRC+=go.mod go.sum

cmd/mkinitfs/main.go

@@ -9,6 +9,8 @@ import (
 	"log"
 	"os"
 	"path/filepath"
+	"runtime/debug"
+	"strings"
 	"time"
 
 	"gitlab.com/postmarketOS/postmarketos-mkinitfs/internal/archive"
@@ -26,8 +28,14 @@ import (
 
 // set at build time
 var Version string
+var DisableGC string
 
 func main() {
+	// To allow working around silly GC-related issues, like https://gitlab.com/qemu-project/qemu/-/issues/2560
+	if strings.ToLower(DisableGC) == "true" {
+		debug.SetGCPercent(-1)
+	}
+
 	retCode := 0
 	defer func() { os.Exit(retCode) }()
 
@@ -106,12 +114,33 @@ func main() {
 		modules.New("/usr/share/mkinitfs/modules"),
 		modules.New("/etc/mkinitfs/modules"),
 	})
+	initfsExtra := initramfs.New([]filelist.FileLister{
+		hookfiles.New("/usr/share/mkinitfs/files-extra"),
+		hookfiles.New("/etc/mkinitfs/files-extra"),
+		hookscripts.New("/usr/share/mkinitfs/hooks-extra", "/hooks-extra"),
+		hookscripts.New("/etc/mkinitfs/hooks-extra", "/hooks-extra"),
+		modules.New("/usr/share/mkinitfs/modules-extra"),
+		modules.New("/etc/mkinitfs/modules-extra"),
+	})
+
 	if err := initramfsAr.AddItems(initfs); err != nil {
 		log.Println(err)
 		log.Println("failed to generate: ", "initramfs")
 		retCode = 1
 		return
 	}
+
+	// Include initramfs-extra files in the initramfs if not making a separate
+	// archive
+	if !devinfo.CreateInitfsExtra {
+		if err := initramfsAr.AddItems(initfsExtra); err != nil {
+			log.Println(err)
+			log.Println("failed to generate: ", "initramfs")
+			retCode = 1
+			return
+		}
+	}
+
 	if err := initramfsAr.Write(filepath.Join(workDir, "initramfs"), os.FileMode(0644)); err != nil {
 		log.Println(err)
 		log.Println("failed to generate: ", "initramfs")
@@ -120,6 +149,7 @@ func main() {
 	}
 	misc.TimeFunc(start, "initramfs")
 
+	if devinfo.CreateInitfsExtra {
 		//
 		// initramfs-extra
 		//
@@ -130,14 +160,6 @@ func main() {
 
 		start = time.Now()
 		initramfsExtraAr := archive.New(compressionFormat, compressionLevel)
-	initfsExtra := initramfs.New([]filelist.FileLister{
-		hookfiles.New("/usr/share/mkinitfs/files-extra"),
-		hookfiles.New("/etc/mkinitfs/files-extra"),
-		hookscripts.New("/usr/share/mkinitfs/hooks-extra", "/hooks-extra"),
-		hookscripts.New("/etc/mkinitfs/hooks-extra", "/hooks-extra"),
-		modules.New("/usr/share/mkinitfs/modules-extra"),
-		modules.New("/etc/mkinitfs/modules-extra"),
-	})
 		if err := initramfsExtraAr.AddItemsExclude(initfsExtra, initfs); err != nil {
 			log.Println(err)
 			log.Println("failed to generate: ", "initramfs-extra")
@@ -151,6 +173,7 @@ func main() {
 			return
 		}
 		misc.TimeFunc(start, "initramfs-extra")
+	}
 
 	// Final processing of initramfs / kernel is done by boot-deploy
 	if !disableBootDeploy {

doc/mkinitfs.1.scd

@@ -42,6 +42,7 @@ mkinitfs reads deviceinfo values from */usr/share/deviceinfo/deviceinfo* and
 */etc/deviceinfo*, in that order. The following variables
 are *required* by mkinitfs:
 
+	- deviceinfo_create_initfs_extra
 	- deviceinfo_generate_systemd_boot
 	- deviceinfo_initfs_compression
 	- deviceinfo_initfs_extra_compression
@@ -146,7 +147,7 @@ create/manage. mkinitfs reads configuration from */usr/share/mkinitfs* first, an
 ## /usr/share/mkinitfs/modules, /etc/mkinitfs/modules
 ## /usr/share/mkinitfs/modules-extra, /etc/mkinitfs/modules-extra
 
-	Files with the *.modules* extention in these directories are lists of
+	Files with the *.modules* extension in these directories are lists of
 	kernel modules to include in the initramfs. Individual modules and
 	directories can be listed in the files here. Globbing is also supported.
 

internal/archive/archive.go

@@ -421,6 +421,7 @@ func (archive *Archive) writeCpio() error {
 		archive.addSymlink("/bin", "/bin")
 		archive.addSymlink("/sbin", "/sbin")
 		archive.addSymlink("/lib", "/lib")
+		archive.addSymlink("/usr/sbin", "/usr/sbin")
 	}
 	// having a transient function for actually adding files to the archive
 	// allows the deferred fd.close to run after every copy and prevent having

internal/bootdeploy/bootdeploy.go

@@ -78,12 +78,17 @@ func (b *BootDeploy) Run() error {
 	}
 
 	// boot-deploy -i initramfs -k vmlinuz-postmarketos-rockchip -d /tmp/cpio -o /tmp/foo initramfs-extra
-	cmd := exec.Command("boot-deploy",
+	args := []string{
 		"-i", "initramfs",
 		"-k", kernFilename,
 		"-d", b.inDir,
 		"-o", b.outDir,
-		"initramfs-extra")
+	}
+
+	if b.devinfo.CreateInitfsExtra {
+		args = append(args, "initramfs-extra")
+	}
+	cmd := exec.Command("boot-deploy", args...)
 
 	cmd.Stdout = os.Stdout
 	cmd.Stderr = os.Stderr

internal/filelist/hookdirs/hookdirs.go

@@ -44,7 +44,7 @@ func (h *HookDirs) List() (*filelist.FileList, error) {
 
 		s := bufio.NewScanner(f)
 		for s.Scan() {
-			dir := s.Text()
+			dir := strings.TrimSpace(s.Text())
 			if len(dir) == 0 || strings.HasPrefix(dir, "#") {
 				continue
 			}

internal/filelist/hookfiles/hookfiles.go

@@ -59,7 +59,7 @@ func slurpFiles(fd io.Reader) (*filelist.FileList, error) {
 
 	s := bufio.NewScanner(fd)
 	for s.Scan() {
-		line := s.Text()
+		line := strings.TrimSpace(s.Text())
 		if len(line) == 0 || strings.HasPrefix(line, "#") {
 			continue
 		}

internal/filelist/modules/modules.go

@@ -83,7 +83,7 @@ func slurpModules(fd io.Reader, modDir string) (*filelist.FileList, error) {
 	files := filelist.NewFileList()
 	s := bufio.NewScanner(fd)
 	for s.Scan() {
-		line := s.Text()
+		line := strings.TrimSpace(s.Text())
 		if len(line) == 0 || strings.HasPrefix(line, "#") {
 			continue
 		}
@@ -103,8 +103,8 @@ func slurpModules(fd io.Reader, modDir string) (*filelist.FileList, error) {
 			}
 		} else if dir == "" {
 			// item is a module name
-			if modFilelist, err := getModule(s.Text(), modDir); err != nil {
+			if modFilelist, err := getModule(line, modDir); err != nil {
-				return nil, fmt.Errorf("unable to get module file %q: %w", s.Text(), err)
+				return nil, fmt.Errorf("unable to get module file %q: %w", line, err)
 			} else {
 				for _, file := range modFilelist {
 					files.Add(file, file)
@@ -188,7 +188,7 @@ func getModuleDeps(modName string, modulesDep io.Reader) ([]string, error) {
 
 	s := bufio.NewScanner(modulesDep)
 	for s.Scan() {
-		line := s.Text()
+		line := strings.TrimSpace(s.Text())
 		if len(line) == 0 || strings.HasPrefix(line, "#") {
 			continue
 		}

internal/filelist/modules/modules_test.go

@@ -18,6 +18,7 @@ func TestStripExts(t *testing.T) {
 		{"another_file", "another_file"},
 		{"a.b.c.d.e.f.g.h.i", "a"},
 		{"virtio_blk.ko", "virtio_blk"},
+		{"virtio_blk.ko ", "virtio_blk"},
 	}
 	for _, table := range tables {
 		out := stripExts(table.in)

pkgs/deviceinfo/deviceinfo.go

@@ -21,6 +21,7 @@ type DeviceInfo struct {
 	UbootBoardname         string
 	GenerateSystemdBoot    string
 	FormatVersion          string
+	CreateInitfsExtra      bool
 }
 
 // Reads the relevant entries from "file" into DeviceInfo struct
@@ -112,6 +113,7 @@ func (d DeviceInfo) String() string {
 			%s: %v
 			%s: %v
 			%s: %v
+			%s: %v
 	}`,
 		"deviceinfo_format_version", d.FormatVersion,
 		"deviceinfo_", d.FormatVersion,
@@ -120,5 +122,6 @@ func (d DeviceInfo) String() string {
 		"deviceinfo_ubootBoardname", d.UbootBoardname,
 		"deviceinfo_generateSystemdBoot", d.GenerateSystemdBoot,
 		"deviceinfo_formatVersion", d.FormatVersion,
+		"deviceinfo_createInitfsExtra", d.CreateInitfsExtra,
 	)
 }

pkgs/deviceinfo/deviceinfo_test.go

@@ -42,6 +42,7 @@ func TestNameToField(t *testing.T) {
 		{"modules_initfs", "ModulesInitfs"},
 		{"deviceinfo_initfs_compression___", "InitfsCompression"},
 		{"deviceinfo_initfs_extra_compression", "InitfsExtraCompression"},
+		{"deviceinfo_create_initfs_extra", "CreateInitfsExtra"},
 	}
 
 	for _, table := range tables {
@@ -65,6 +66,7 @@ func TestUnmarshal(t *testing.T) {
 			UbootBoardname:         "foobar-bazz",
 			InitfsCompression:      "zstd:--foo=1 -T0 --bar=bazz",
 			InitfsExtraCompression: "",
+			CreateInitfsExtra:      true,
 		},
 		},
 	}

pkgs/deviceinfo/test_resources/deviceinfo-unmarshal-1

@@ -4,3 +4,4 @@ deviceinfo_uboot_boardname="foobar-bazz"
 deviceinfo_initfs_compression="zstd:--foo=1 -T0 --bar=bazz"
 # empty option
 deviceinfo_initfs_extra_compression=""
+deviceinfo_create_initfs_extra="true"