Added: KERNEL_REDUCE - less than 128MB used space, Added: REDUCE_ parameters

4 files changed, 112 insertions, 3 deletions

diff --git a/bootstrap.d/10-bootstrap.sh b/bootstrap.d/10-bootstrap.sh
index f4a57cc..7b4a04d 100644
--- a/bootstrap.d/10-bootstrap.sh
+++ b/bootstrap.d/10-bootstrap.sh
@@ -7,7 +7,7 @@
 
 # Base debootstrap (unpack only)
 if [ "$ENABLE_MINBASE" = true ] ; then
-  http_proxy=${APT_PROXY} debootstrap --arch="${RELEASE_ARCH}" --variant=minbase --foreign --include="${APT_INCLUDES}" "${RELEASE}" "$R" "http://${APT_SERVER}/debian"
+  http_proxy=${APT_PROXY} debootstrap --arch="${RELEASE_ARCH}" --foreign --variant=minbase --include="${APT_INCLUDES}" "${RELEASE}" "$R" "http://${APT_SERVER}/debian"
 else
   http_proxy=${APT_PROXY} debootstrap --arch="${RELEASE_ARCH}" --foreign --include="${APT_INCLUDES}" "${RELEASE}" "$R" "http://${APT_SERVER}/debian"
 fi
diff --git a/bootstrap.d/13-kernel.sh b/bootstrap.d/13-kernel.sh
index a8e4f4a..671025d 100644
--- a/bootstrap.d/13-kernel.sh
+++ b/bootstrap.d/13-kernel.sh
@@ -29,7 +29,44 @@ if [ "$BUILD_KERNEL" = true ] ; then
     KERNEL_THREADS=$(grep -c processor /proc/cpuinfo)
   fi
 
+  # Configure and build kernel
   if [ "$KERNELSRC_PREBUILT" = false ] ; then
+    # Remove device, network and filesystem drivers from kernel configuration
+    if [ "$KERNEL_REDUCE" = true ] ; then
+      make -C "$R/usr/src/linux" ARCH="${KERNEL_ARCH}" CROSS_COMPILE="${CROSS_COMPILE}" "${KERNEL_DEFCONFIG}"
+      sed -i\
+      -e "s/\(^CONFIG_SND.*\=\).*/\1n/"\
+      -e "s/\(^CONFIG_SOUND.*\=\).*/\1n/"\
+      -e "s/\(^CONFIG_AC97.*\=\).*/\1n/"\
+      -e "s/\(^CONFIG_VIDEO_.*\=\).*/\1n/"\
+      -e "s/\(^CONFIG_MEDIA_TUNER.*\=\).*/\1n/"\
+      -e "s/\(^CONFIG_DVB.*\=\)[ym]/\1n/"\
+      -e "s/\(^CONFIG_REISERFS.*\=\).*/\1n/"\
+      -e "s/\(^CONFIG_JFS.*\=\).*/\1n/"\
+      -e "s/\(^CONFIG_XFS.*\=\).*/\1n/"\
+      -e "s/\(^CONFIG_GFS2.*\=\).*/\1n/"\
+      -e "s/\(^CONFIG_OCFS2.*\=\).*/\1n/"\
+      -e "s/\(^CONFIG_BTRFS.*\=\).*/\1n/"\
+      -e "s/\(^CONFIG_HFS.*\=\).*/\1n/"\
+      -e "s/\(^CONFIG_JFFS2.*\=\)[ym]/\1n/"\
+      -e "s/\(^CONFIG_UBIFS.*\=\).*/\1n/"\
+      -e "s/\(^CONFIG_SQUASHFS.*\=\)[ym]/\1n/"\
+      -e "s/\(^CONFIG_W1.*\=\)[ym]/\1n/"\
+      -e "s/\(^CONFIG_HAMRADIO.*\=\).*/\1n/"\
+      -e "s/\(^CONFIG_CAN.*\=\).*/\1n/"\
+      -e "s/\(^CONFIG_IRDA.*\=\).*/\1n/"\
+      -e "s/\(^CONFIG_BT_.*\=\).*/\1n/"\
+      -e "s/\(^CONFIG_WIMAX.*\=\)[ym]/\1n/"\
+      -e "s/\(^CONFIG_6LOWPAN.*\=\).*/\1n/"\
+      -e "s/\(^CONFIG_IEEE802154.*\=\).*/\1n/"\
+      -e "s/\(^CONFIG_NFC.*\=\).*/\1n/"\
+      -e "s/\(^CONFIG_FB_TFT=.*\=\).*/\1n/"\
+      -e "s/\(^CONFIG_TOUCHSCREEN.*\=\).*/\1n/"\
+      -e "s/\(^CONFIG_USB_GSPCA_.*\=\).*/\1n/"\
+      -e "s/\(^CONFIG_DRM.*\=\).*/\1n/"\
+      "$R/usr/src/linux/.config"
+    fi
+
     if [ "$KERNELSRC_CONFIG" = true ] ; then
       # Load default raspberry kernel configuration
       make -C "$R/usr/src/linux" ARCH="${KERNEL_ARCH}" CROSS_COMPILE="${CROSS_COMPILE}" "${KERNEL_DEFCONFIG}"
@@ -62,7 +99,7 @@ if [ "$BUILD_KERNEL" = true ] ; then
   fi
 
   # Install kernel headers
-  if [ "$KERNEL_HEADERS" = true ] ; then
+  if [ "$KERNEL_HEADERS" = true ] && [ "$KERNEL_REDUCE" = false ] ; then
     make -C "$R/usr/src/linux" ARCH="${KERNEL_ARCH}" CROSS_COMPILE="${CROSS_COMPILE}" INSTALL_HDR_PATH=../.. headers_install
   fi
 
diff --git a/bootstrap.d/50-firstboot.sh b/bootstrap.d/50-firstboot.sh
index 4892c4b..0c93d11 100644
--- a/bootstrap.d/50-firstboot.sh
+++ b/bootstrap.d/50-firstboot.sh
@@ -9,7 +9,7 @@
 cat files/firstboot/10-begin.sh > "$R/etc/rc.firstboot"
 
 # Ensure openssh server host keys are regenerated on first boot
-if [ "$ENABLE_SSHD" = true ] ; then
+if [ "$ENABLE_SSHD" = true ] && [ "$ENABLE_REDUCE" = false ]; then
   cat files/firstboot/21-generate-ssh-keys.sh >> "$R/etc/rc.firstboot"
   rm -f "$R/etc/ssh/ssh_host_*"
 fi
diff --git a/bootstrap.d/99-reduce.sh b/bootstrap.d/99-reduce.sh
new file mode 100644
index 0000000..f3b2848
--- /dev/null
+++ b/bootstrap.d/99-reduce.sh
@@ -0,0 +1,72 @@
+#
+# Reduce system disk usage
+#
+
+# Load utility functions
+. ./functions.sh
+
+# Reduce the image size by various operations
+if [ "$ENABLE_REDUCE" = true ] ; then
+  if [ "$REDUCE_APT" = true ] ; then
+    # Install dpkg configuration file
+    if [ "$REDUCE_DOC" = true ] || [ "$REDUCE_MAN" = true ] ; then
+      install_readonly files/dpkg/01nodoc "$R/etc/dpkg/dpkg.cfg.d/01nodoc"
+    fi
+
+    # Install APT configuration files
+    install_readonly files/apt/02nocache "$R/etc/apt/apt.conf.d/02nocache"
+    install_readonly files/apt/03compress "$R/etc/apt/apt.conf.d/03compress"
+    install_readonly files/apt/04norecommends "$R/etc/apt/apt.conf.d/04norecommends"
+
+    # Remove APT cache files
+    rm -fr "$R/var/cache/apt/pkgcache.bin"
+    rm -fr "$R/var/cache/apt/srcpkgcache.bin"
+  fi
+
+  # Remove all doc files
+  if [ "$REDUCE_DOC" = true ] ; then
+    find "$R/usr/share/doc" -depth -type f ! -name copyright | xargs rm || true
+    find "$R/usr/share/doc" -empty | xargs rmdir || true
+  fi
+
+  # Remove all man pages and info files
+  if [ "$REDUCE_MAN" = true ] ; then
+    rm -rf "$R/usr/share/man" "$R/usr/share/groff" "$R/usr/share/info" "$R/usr/share/lintian" "$R/usr/share/linda" "$R/var/cache/man"
+  fi
+
+  # Remove all locale translation files
+  if [ "$REDUCE_LOCALE" = true ] ; then
+    find "$R/usr/share/locale" -mindepth 1 -maxdepth 1 ! -name 'en' | xargs rm -r
+  fi
+
+  # Remove hwdb PCI device classes (experimental)
+  if [ "$REDUCE_HWDB" = true ] ; then
+    rm -fr "/lib/udev/hwdb.d/20-pci-*"
+  fi
+
+  # Replace bash shell by dash shell (experimental)
+  if [ "$REDUCE_BASH" = true ] ; then
+    echo "Yes, do as I say!" | chroot_exec apt-get purge -qq -y --force-yes bash
+    chroot_exec update-alternatives --install /bin/bash bash /bin/dash 100
+  fi
+
+  # Remove sound utils and libraries
+  if [ "$ENABLE_SOUND" = false ] ; then
+    chroot_exec apt-get -qq -y --force-yes purge alsa-utils libsamplerate0 libasound2 libasound2-data
+  fi
+
+  # Re-install tools for managing kernel moduless
+  chroot_exec apt-get -qq -y --force-yes install module-init-tools
+
+  # Remove GPU kernels
+  if [ "$ENABLE_MINGPU" = true ] ; then
+    rm -f "$R/boot/firmware/start.elf"
+    rm -f "$R/boot/firmware/fixup.dat"
+    rm -f "$R/boot/firmware/start_x.elf"
+    rm -f "$R/boot/firmware/fixup_x.dat"
+  fi
+
+  # Clean APT list of repositories
+  rm -fr "$R/var/lib/apt/lists/*"
+  chroot_exec apt-get -qq -y update
+fi