fix: clean ubuntu modules package

distro/ubuntu/ubuntu.go

@@ -0,0 +1,48 @@
+package ubuntu
+
+import (
+	"fmt"
+
+	"code.dumpstack.io/tools/out-of-tree/config"
+)
+
+func Envs(km config.KernelMask) (envs []string) {
+	envs = append(envs, "DEBIAN_FRONTEND=noninteractive")
+	return
+}
+
+func Runs(km config.KernelMask) (commands []string) {
+	cmdf := func(f string, s ...interface{}) {
+		commands = append(commands, fmt.Sprintf(f, s...))
+	}
+
+	if km.DistroRelease < "14.04" {
+		cmdf("sed -i 's/archive.ubuntu.com/old-releases.ubuntu.com/' " +
+			"/etc/apt/sources.list")
+	}
+
+	cmdf("apt-get update")
+	cmdf("apt-get install -y build-essential libelf-dev")
+	cmdf("apt-get install -y wget git")
+
+	if km.DistroRelease < "14.04" {
+		return
+	}
+
+	cmdf("apt-get install -y libseccomp-dev")
+
+	// Install and remove a single kernel and headers.
+	// This ensures that all dependencies are cached.
+
+	cmdf("export TMP_HEADERS=$(apt-cache search " +
+		"--names-only '^linux-headers-[0-9\\.\\-]*-generic' " +
+		"| awk '{ print $1 }' | head -n 1)")
+
+	cmdf("export TMP_KERNEL=$(echo $TMP_HEADERS | sed 's/headers/image/')")
+	cmdf("export TMP_MODULES=$(echo $TMP_HEADERS | sed 's/headers/modules/')")
+
+	cmdf("apt-get install -y $TMP_HEADERS $TMP_KERNEL $TMP_MODULES")
+	cmdf("apt-get remove -y $TMP_HEADERS $TMP_KERNEL $TMP_MODULES")
+
+	return
+}

kernel/kernel.go

@@ -25,6 +25,7 @@ import (
 	"code.dumpstack.io/tools/out-of-tree/config"
 	"code.dumpstack.io/tools/out-of-tree/container"
 	"code.dumpstack.io/tools/out-of-tree/distro/debian"
+	"code.dumpstack.io/tools/out-of-tree/distro/ubuntu"
 	"code.dumpstack.io/tools/out-of-tree/fs"
 )
 
@@ -179,21 +180,12 @@ func GenerateBaseDockerImage(registry string, commands []config.DockerCommand,
 
 	switch sk.DistroType {
 	case config.Ubuntu:
-		if sk.DistroRelease < "14.04" {
-			d += "RUN sed -i 's/archive.ubuntu.com/old-releases.ubuntu.com/' /etc/apt/sources.list\n"
+		for _, e := range ubuntu.Envs(sk) {
+			d += "ENV " + e + "\n"
 		}
-		d += "ENV DEBIAN_FRONTEND=noninteractive\n"
-		d += "RUN apt-get update\n"
-		d += "RUN apt-get install -y build-essential libelf-dev\n"
-		d += "RUN apt-get install -y wget git\n"
-		// Install a single kernel and headers to ensure all dependencies are cached
-		if sk.DistroRelease >= "14.04" {
-			d += "RUN export PKGNAME=$(apt-cache search --names-only '^linux-headers-[0-9\\.\\-]*-generic' | awk '{ print $1 }' | head -n 1); " +
-				"apt-get install -y $PKGNAME $(echo $PKGNAME | sed 's/headers/image/'); " +
-				"apt-get remove -y $PKGNAME $(echo $PKGNAME | sed 's/headers/image/')\n"
-			d += "RUN apt-get install -y libseccomp-dev\n"
+		for _, c := range ubuntu.Runs(sk) {
+			d += "RUN " + c + "\n"
 		}
-		d += "RUN mkdir -p /lib/modules\n"
 	case config.CentOS:
 		var repos []string