Added Oracle JRE/JDK and Apache Felix OSGi framework as overlay bundles. This needs additional cleanup. Updated the kernel build process - artifacts are used from separate install location.

src/.config

@@ -8,7 +8,7 @@
 #
 #   http://kernel.org
 #
-KERNEL_SOURCE_URL=http://kernel.org/pub/linux/kernel/v4.x/linux-4.5.3.tar.xz
+KERNEL_SOURCE_URL=http://kernel.org/pub/linux/kernel/v4.x/linux-4.5.5.tar.xz
 
 # You can find the latest GNU libc source bundles here:
 #
@@ -32,11 +32,11 @@ SYSLINUX_SOURCE_URL=http://kernel.org/pub/linux/utils/boot/syslinux/syslinux-6.0
 
 
 
-######################################################
+#####################################################################
 #                                                                   #
-#  This section contains the overlay source bundles  #
+#  This section contains the overlay source bundles and properties  #
 #                                                                   #
-######################################################
+#####################################################################
 
 # You can find the latest Links source bundles here:
 #
@@ -50,6 +50,20 @@ LINKS_SOURCE_URL=http://links.twibright.com/download/links-2.12.tar.bz2
 #
 DROPBEAR_SOURCE_URL=http://matt.ucc.asn.au/dropbear/releases/dropbear-2016.73.tar.bz2
 
+# You can find the latest Apache Felix source bundles here:
+#
+#   http://felix.apache.org
+#
+FELIX_SOURCE_URL=http://www-us.apache.org/dist/felix/org.apache.felix.main.distribution-5.4.0.tar.gz
+
+# Download Oracle's jdk/jre and set the property with the absolute path to
+# the archive. Example:
+#
+#   JAVA_ARCHIVE=/home/ivan/Downloads/jdk-8u91-linux-x64.tar.gz
+#
+#JAVA_ARCHIVE=/absolute/path/to/java.archive.tar.gz
+JAVA_ARCHIVE=/home/ivan/Downloads/jdk-8u91-linux-x64.tar.gz
+
 
 
 ####################################################
@@ -102,7 +116,7 @@ OVERLAY_TYPE=folder
 # internet. This is useful when you have already downloaded the sources and have
 # no internet connection. Or if you want to share your version of "Minimal Linux
 # Live" with predefined sources.
-USE_LOCAL_SOURCE=false
+USE_LOCAL_SOURCE=true
 
 # Copy "Minimal Linux Live" source files and folders in '/src' inside initramfs.
 # The default value is 'true'. You can use any other value, no value, or comment
@@ -130,8 +144,11 @@ COPY_SOURCE_ISO=true
 # glibc_full - all core GNU C libraries (useful if other software is included)
 # links      - text browser
 # dropbear   - SSH server and client
+# java       - installs Oracle's JRE or JDK. Manual steps required.
+# felix      - Apache Felix OSGi framework.
 #
-#OVERLAY_SOFTWARE=glibc_full,links,dropbear
+#OVERLAY_BUNDLES=glibc_full,links,dropbear,java,felix
+OVERLAY_BUNDLES=glibc_full,java,felix
 
 # This property enables the standard penguin boot logo in the upper left corner
 # of the screen. The property is used in 'xx_build_kernel.sh'. The default value
@@ -140,8 +157,8 @@ USE_BOOT_LOGO=true
 
 # This property is the multiplicator which is used during the build process. The
 # total number of each 'make' jobs will be equal to the number of detected CPU
-# cores mutiplied by this property. For example, if your CPU has 4 cores, then
+# cores mutiplied by this property. For example, if you set this property with
-# the number of 'make' jobs will be 4 * 2 = 8. Don't change this value unless
+# value '2' and if your CPU has 4 cores, then the number of 'make' jobs will be
-# you know what 'make' jobs are! 
+# 4 * 2 = 8. Don't change this property unless you know what 'make' jobs are! 
-JOB_FACTOR=2
+JOB_FACTOR=1
 

src/02_build_kernel.sh

@@ -15,6 +15,10 @@ NUM_JOBS=$((NUM_CORES * JOB_FACTOR))
 
 cd work/kernel
 
+# Prepare the kernel install area.
+rm -rf kernel_installed
+mkdir kernel_installed
+
 # Change to the kernel source directory which ls finds, e.g. 'linux-4.4.6'.
 cd $(ls -d linux-*)
 
@@ -77,10 +81,16 @@ make \
   CFLAGS="-Os -s -fno-stack-protector -U_FORTIFY_SOURCE" \
   bzImage -j $NUM_JOBS
 
-# Install kernel headers in './usr' (this is not '/usr') which are used later
+# Install the kernel file.
-# when we build and configure the GNU C library (glibc).
+cp arch/x86/boot/bzImage \
+  $SRC_DIR/work/kernel/kernel_installed/kernel
+
+# Install kernel headers which are used later when we build and configure the
+# GNU C library (glibc).
 echo "Generating kernel headers..."
-make headers_install -j $NUM_JOBS
+make \
+  INSTALL_HDR_PATH=$SRC_DIR/work/kernel/kernel_installed \
+  headers_install -j $NUM_JOBS
 
 cd $SRC_DIR
 

src/04_build_glibc.sh

@@ -13,11 +13,8 @@ NUM_CORES=$(grep ^processor /proc/cpuinfo | wc -l)
 # Calculate the number of 'make' jobs to be used later.
 NUM_JOBS=$((NUM_CORES * JOB_FACTOR))
 
-# Find the kernel build directory.
+# Save the kernel installation directory.
-cd work/kernel
+KERNEL_INSTALLED=$SRC_DIR/work/kernel/kernel_installed
-cd $(ls -d linux-*)
-WORK_KERNEL_DIR=$(pwd)
-cd $SRC_DIR
 
 cd work/glibc
 
@@ -49,7 +46,7 @@ cd glibc_objects
 echo "Configuring glibc..."
 $GLIBC_SRC/configure \
   --prefix= \
-  --with-headers=$WORK_KERNEL_DIR/usr/include \
+  --with-headers=$KERNEL_INSTALLED/include \
   --without-gd \
   --without-selinux \
   --disable-werror \

src/05_prepare_glibc.sh

@@ -4,11 +4,8 @@ echo "*** PREPARE GLIBC BEGIN ***"
 
 SRC_DIR=$(pwd)
 
-# Find the kernel build directory.
+# Save the kernel installation directory.
-cd work/kernel
+KERNEL_INSTALLED=$(pwd)
-cd $(ls -d *)
-WORK_KERNEL_DIR=$(pwd)
-cd $SRC_DIR
 
 cd work/glibc
 
@@ -45,10 +42,10 @@ ln -s ../lib lib
 
 cd ../include
 
-ln -s $WORK_KERNEL_DIR/usr/include/linux linux
+ln -s $KERNEL_INSTALLED/include/linux linux
-ln -s $WORK_KERNEL_DIR/usr/include/asm asm
+ln -s $KERNEL_INSTALLED/include/asm asm
-ln -s $WORK_KERNEL_DIR/usr/include/asm-generic asm-generic
+ln -s $KERNEL_INSTALLED/asm-generic asm-generic
-ln -s $WORK_KERNEL_DIR/usr/include/mtd mtd
+ln -s $KERNEL_INSTALLED/include/mtd mtd
 
 cd $SRC_DIR
 

src/08_prepare_src.sh

@@ -6,6 +6,8 @@ SRC_DIR=$(pwd)
 
 cd work
 
+echo "Preparing source files and folders. This may take a while..."
+
 # Remove old sources (if they exist)
 rm -rf src
 mkdir src

src/10_pack_rootfs.sh

@@ -6,14 +6,17 @@ SRC_DIR=$(pwd)
 
 cd work
 
+echo "Packing initramfs. This may take a while..."
+
 # Remove the old 'initramfs' archive if it exists.
 rm -f rootfs.cpio.gz
 
 cd rootfs
 
 # Packs the current 'initramfs' folder structure in 'cpio.xz' archive.
-echo "Packing initramfs..."
+find . | cpio -R root:root -H newc -o | xz -9 --check=none > ../rootfs.cpio.xz
-find . | cpio -R root:root -H newc -o | xz --check=none > ../rootfs.cpio.xz
+
+echo "Packing of initramfs has finished."
 
 cd $SRC_DIR
 

src/12_generate_iso.sh

@@ -4,11 +4,8 @@ echo "*** GENERATE ISO BEGIN ***"
 
 SRC_DIR=$(pwd)
 
-# Find the kernel build directory.
+# Save the kernel installation directory.
-cd work/kernel
+KERNEL_INSTALLED=$SRC_DIR/work/kernel/kernel_installed
-cd $(ls -d *)
-WORK_KERNEL_DIR=$(pwd)
-cd $SRC_DIR
 
 # Find the Syslinux build directory.
 cd work/syslinux
@@ -40,14 +37,14 @@ else
   echo "Source files and folders have been skipped."
 fi
 
-# Read the 'OVERLAY_SOFTWARE' property from '.config'
+# Read the 'OVERLAY_BUNDLES' property from '.config'
-OVERLAY_SOFTWARE="$(grep -i ^OVERLAY_SOFTWARE .config | cut -f2 -d'=')"
+OVERLAY_BUNDLES="$(grep -i ^OVERLAY_BUNDLES .config | cut -f2 -d'=')"
 
-if [ ! "$OVERLAY_SOFTWARE" = "" ] ; then
+if [ ! "$OVERLAY_BUNDLES" = "" ] ; then
-  echo "Generating additional overlay software. This may take a while..."
+  echo "Generating additional overlay bundles. This may take a while..."
-  sh build_minimal_linux_overlay.sh
+  time sh build_minimal_linux_overlay.sh
 else
-  echo "Generation of additional overlay software has been skipped."
+  echo "Generation of additional overlay bundles has been skipped."
 fi
 
 cd work/isoimage
@@ -58,7 +55,7 @@ cp $WORK_SYSLINUX_DIR/bios/core/isolinux.bin .
 cp $WORK_SYSLINUX_DIR/bios/com32/elflink/ldlinux/ldlinux.c32 .
 
 # Now we copy the kernel.
-cp $WORK_KERNEL_DIR/arch/x86/boot/bzImage ./kernel.xz
+cp $KERNEL_INSTALLED/kernel ./kernel.xz
 
 # Now we copy the root file system.
 cp ../rootfs.cpio.xz ./rootfs.xz
@@ -121,8 +118,7 @@ else
   echo "Generating ISO image with no overlay structure..."
 fi
 
-# Create ISOLINUX configuration file.
+# Create the ISOLINUX configuration file.
-#echo 'default kernel.xz  initrd=rootfs.xz vga=769' > ./isolinux.cfg
 echo 'default kernel.xz  initrd=rootfs.xz vga=ask' > ./isolinux.cfg
 
 # Now we generate the ISO image file.
@@ -139,7 +135,9 @@ genisoimage \
   ./
 
 # This allows the ISO image to be bootable if it is burned on USB flash drive.
-isohybrid ../minimal_linux_live.iso 2>/dev/null || true
+# The -u option is used in EFI boot mode (still not supported) and it reduces
+# the ISO image size.
+isohybrid -u ../minimal_linux_live.iso 2>/dev/null || true
 
 # Copy the ISO image to the root project folder.
 cp ../minimal_linux_live.iso ../../

src/build_minimal_linux_live.sh

@@ -1,16 +1,16 @@
 #!/bin/sh
 
-sh 00_clean.sh
+sh time 00_clean.sh
-sh 01_get_kernel.sh
+sh time 01_get_kernel.sh
-sh 02_build_kernel.sh
+sh time 02_build_kernel.sh
-sh 03_get_glibc.sh
+sh time 03_get_glibc.sh
-sh 04_build_glibc.sh
+sh time 04_build_glibc.sh
-sh 05_prepare_glibc.sh
+sh time 05_prepare_glibc.sh
-sh 06_get_busybox.sh
+sh time 06_get_busybox.sh
-sh 07_build_busybox.sh
+sh time 07_build_busybox.sh
-sh 08_prepare_src.sh
+sh time 08_prepare_src.sh
-sh 09_generate_rootfs.sh
+sh time 09_generate_rootfs.sh
-sh 10_pack_rootfs.sh
+sh time 10_pack_rootfs.sh
-sh 11_get_syslinux.sh
+sh time 11_get_syslinux.sh
-sh 12_generate_iso.sh
+sh time 12_generate_iso.sh
 

src/build_minimal_linux_overlay.sh

@@ -1,24 +1,24 @@
 #!/bin/sh
 
-# Read the 'OVERLAY_SOFTWARE' property from '.config'
+# Read the 'OVERLAY_BUNDLES' property from '.config'
-OVERLAY_SOFTWARE="$(grep -i ^OVERLAY_SOFTWARE .config | cut -f2 -d'=')"
+OVERLAY_BUNDLES="$(grep -i ^OVERLAY_BUNDLES .config | cut -f2 -d'=')"
 
-if [ "$OVERLAY_SOFTWARE" = "" ] ; then
+if [ "$OVERLAY_BUNDLES" = "" ] ; then
-  echo "There is no overlay software to build."
+  echo "There are no overlay bundles to build."
 else
-  sh overlay_00_clean.sh
+  time sh overlay_00_clean.sh
 
-  OVERLAY_PIECES="$(echo $OVERLAY_SOFTWARE | tr ',' ' ')"
+  OVERLAY_BUNDLES_LIST="$(echo $OVERLAY_BUNDLES | tr ',' ' ')"
 
-  for OVERLAY in $OVERLAY_PIECES
+  for BUNDLE in $OVERLAY_BUNDLES_LIST
   do
-    OVERLAY_SCRIPT=overlay_$OVERLAY.sh
+    OVERLAY_SCRIPT=overlay_$BUNDLE.sh
     
     if [ ! -f $OVERLAY_SCRIPT ] ; then
       echo "Error - cannot find overlay script file '$OVERLAY_SCRIPT'."
     else
-      echo "Building '$OVERLAY'..."
+      echo "Building overlay bundle '$BUNDLE'..."
-      sh $OVERLAY_SCRIPT
+      time sh $OVERLAY_SCRIPT
     fi
   done
 fi

src/overlay_dropbear.sh

@@ -1,5 +1,5 @@
 #!/bin/sh
 
-sh overlay_dropbear_01_get.sh
+time sh overlay_dropbear_01_get.sh
-sh overlay_dropbear_02_build.sh
+time sh overlay_dropbear_02_build.sh
 

src/overlay_felix.sh

@@ -0,0 +1,5 @@
+#!/bin/sh
+
+time sh overlay_felix_01_get.sh
+time sh overlay_felix_02_install.sh
+

src/overlay_felix_01_get.sh

@@ -0,0 +1,39 @@
+#!/bin/sh
+
+SRC_DIR=$(pwd)
+
+# Grab everything after the '=' character.
+DOWNLOAD_URL=$(grep -i FELIX_SOURCE_URL .config | cut -f2 -d'=')
+
+# Grab everything after the last '/' character.
+ARCHIVE_FILE=${DOWNLOAD_URL##*/}
+
+# Read the 'USE_LOCAL_SOURCE' property from '.config'
+USE_LOCAL_SOURCE="$(grep -i USE_LOCAL_SOURCE .config | cut -f2 -d'=')"
+
+if [ "$USE_LOCAL_SOURCE" = "true" -a ! -f $SRC_DIR/source/overlay/$ARCHIVE_FILE  ] ; then
+  echo "Source bundle $SRC_DIR/source/overlay/$ARCHIVE_FILE is missing and will be downloaded."
+  USE_LOCAL_SOURCE="false"
+fi
+
+cd source/overlay
+
+if [ ! "$USE_LOCAL_SOURCE" = "true" ] ; then
+  # Downloading Apache Felix source bundle file. The '-c' option allows the download to resume.
+  echo "Downloading Apache Felix source bundle from $DOWNLOAD_URL"
+  wget -c $DOWNLOAD_URL
+else
+  echo "Using local Apache Felix source bundle $SRC_DIR/source/overlay/$ARCHIVE_FILE"
+fi
+
+# Delete folder with previously extracted Felix.
+echo "Removing Apache Felix work area. This may take a while..."
+rm -rf ../../work/overlay/felix
+mkdir ../../work/overlay/felix
+
+# Extract Felix to folder 'work/overlay/felix'.
+# Full path will be something like 'work/overlay/felix/felix-framework-5.4.0'.
+tar -xvf $ARCHIVE_FILE -C ../../work/overlay/felix
+
+cd $SRC_DIR
+

src/overlay_felix_02_install.sh

@@ -0,0 +1,35 @@
+#!/bin/sh
+
+SRC_DIR=$(pwd)
+
+echo "Removing old Apache Felix artifacts. This may take a while..."
+rm -rf $SRC_DIR/work/overlay/felix/felix_installed
+mkdir -p $SRC_DIR/work/overlay/felix/felix_installed/opt/felix
+mkdir -p $SRC_DIR/work/overlay/felix/felix_installed/bin
+
+cd $SRC_DIR/work/overlay/felix
+cd $(ls -d felix-*)
+
+cat << CEOF > bin/felix-start.sh
+#!/bin/sh
+
+cd /opt/felix
+java -jar bin/felix.jar
+
+CEOF
+
+chmod +rx bin/felix-start.sh
+
+cp -r * $SRC_DIR/work/overlay/felix/felix_installed/opt/felix
+
+cd $SRC_DIR/work/overlay/felix/felix_installed
+
+ln -s ../opt/felix/bin/felix-start.sh bin/felix-start.sh 
+
+cp -r $SRC_DIR/work/overlay/felix/felix_installed/* \
+  $SRC_DIR/work/src/minimal_overlay
+
+echo "Apache Felix has been installed."
+
+cd $SRC_DIR
+

src/overlay_glibc_full.sh

@@ -7,14 +7,13 @@ if [ ! -d $SRC_DIR/work/glibc/glibc_prepared ] ; then
   exit 1
 fi
 
-echo "Preparing the overlay glibc folder. Tis may take a while..."
+echo "Preparing the overlay glibc folder. This may take a while..."
 rm -rf work/overlay/glibc
 mkdir -p work/overlay/glibc/lib
 
 cd work/glibc/glibc_prepared/lib
 
 find . -type l -exec cp {} $SRC_DIR/work/overlay/glibc/lib \;
-
 echo "All libraries have been copied."
 
 cd $SRC_DIR/work/overlay/glibc/lib
@@ -32,11 +31,9 @@ done
 echo "Duplicate libraries have been replaced with soft links."
 
 strip -g *
-
 echo "All libraries have been optimized for size."
 
 cp -r $SRC_DIR/work/overlay/glibc/lib $SRC_DIR/work/src/minimal_overlay
-
 echo "All libraries have been installed."
 
 cd $SRC_DIR

src/overlay_java.sh

@@ -0,0 +1,54 @@
+#!/bin/sh
+
+# This script installs Oracle's JRE or JDK from already downloaded 'tar.gz'
+# archive. Oracle's license doesn't allow direct downloads, so you need to do
+# the following:
+#
+# 1) Download JRE or JDK from http://oracle.com
+# 2) Add the following property in the '.config' file:
+#
+#      JAVA_ARCHIVE=/absolute/path/to/java/archive.tar.gz
+#
+#    Example:
+#
+#      JAVA_ARCHIVE=/home/myself/Downloads/jdk-8u91-linux-x64.tar.gz
+#
+# 3) Run this script. Note that the script will fail with error message if the
+#    'JAVA_ARCHIVE' property is not set or if it points to invalid file.
+
+SRC_DIR=$(pwd)
+
+# Read the 'JAVA_ARCHIVE' property from '.config'
+JAVA_ARCHIVE="$(grep -i ^JAVA_ARCHIVE .config | cut -f2 -d'=')"
+
+if [ "$JAVA_ARCHIVE" = "" ] ; then
+  echo "ERROR: configuration property 'JAVA_ARCHIVE' is not set."
+  exit 1
+elif [ ! -f "$JAVA_ARCHIVE" ] ; then
+  echo "ERROR: configuration property 'JAVA_ARCHIVE' points to non existent file."
+  exit 1
+fi
+
+rm -rf $SRC_DIR/work/overlay/java
+mkdir -p $SRC_DIR/work/overlay/java/opt
+
+tar -xvf \
+  $JAVA_ARCHIVE \
+  -C $SRC_DIR/work/overlay/java/opt
+
+cd $SRC_DIR/work/overlay/java/opt
+mv $(ls -d *) java
+
+mkdir $SRC_DIR/work/overlay/java/bin
+
+for FILE in $(ls java/bin)
+do
+  ln -s ../opt/java/bin/$FILE ../bin/$FILE
+done
+
+cp -r $SRC_DIR/work/overlay/java/* $SRC_DIR/work/src/minimal_overlay
+
+echo "Java has been installed."
+
+cd $SRC_DIR
+

src/overlay_links.sh

@@ -1,5 +1,5 @@
 #!/bin/sh
 
-sh overlay_links_01_get.sh
+time sh overlay_links_01_get.sh
-sh overlay_links_02_build.sh
+time sh overlay_links_02_build.sh