Redesigned the overlay build process - now it is more flexible. Updated property read process - now only properties in the beginning of the line are used.

src/.config

@@ -114,15 +114,23 @@ COPY_SOURCE_ROOTFS=true
 # the property in order to disable it.
 COPY_SOURCE_ISO=true
 
-# This flag defines whether to build additional overlay software which will be
-# placed in the 'work/src/minimal_overlay' folder. This software will be visible
-# and fully usable after boot. The default is 'false'. Note that if you set this
-# to 'true' and you are using sparse image file for the overlay structure then
-# most probably something will go wrong because the additional overlay software
+# This property defines one or more additional overlay software pieces which
+# will be generated and placed in the 'work/src/minimal_overlay' folder. These
+# software pieces will be visible and fully usable after boot. By default this
+# property is disabled because the build process for all overlay software is
+# host specific and may not work out of the box. Note that if you build any
+# overlay software and you are using sparse image file for the overlay structure
+# then most probably something will go wrong because the overlay software
 # requires more than 1MB free space. The solution is to use folder overlay or to
 # edit the script 'xx_generate_iso.sh' and set it to create sparse image file
 # with bigger size.
-BUILD_OVERLAY_SOFTWARE=false
+#
+# Currently available overlay software:
+#
+# links    - text browser
+# dropbear - SSH server and client
+#
+#OVERLAY_SOFTWARE=links,dropbear
 
 # 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

src/01_get_kernel.sh

@@ -5,13 +5,13 @@ echo "*** GET KERNEL BEGIN ***"
 SRC_DIR=$(pwd)
 
 # Grab everything after the '=' character.
-DOWNLOAD_URL=$(grep -i KERNEL_SOURCE_URL .config | cut -f2 -d'=')
+DOWNLOAD_URL=$(grep -i ^KERNEL_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="$(grep -i USE_LOCAL_SOURCE .config | cut -f2 -d'=')"
+USE_LOCAL_SOURCE="$(grep -i ^USE_LOCAL_SOURCE .config | cut -f2 -d'=')"
 
 if [ "$USE_LOCAL_SOURCE" = "true" -a ! -f $SRC_DIR/source/$ARCHIVE_FILE  ] ; then
   echo "Source bundle $SRC_DIR/source/$ARCHIVE_FILE is missing and will be downloaded."

src/02_build_kernel.sh

@@ -14,7 +14,7 @@ echo "Preparing kernel work area..."
 make mrproper
 
 # Read the 'USE_PREDEFINED_KERNEL_CONFIG' property from '.config'
-USE_PREDEFINED_KERNEL_CONFIG="$(grep -i USE_PREDEFINED_KERNEL_CONFIG $SRC_DIR/.config | cut -f2 -d'=')"
+USE_PREDEFINED_KERNEL_CONFIG="$(grep -i ^USE_PREDEFINED_KERNEL_CONFIG $SRC_DIR/.config | cut -f2 -d'=')"
 
 if [ "$USE_PREDEFINED_KERNEL_CONFIG" = "true" -a ! -f $SRC_DIR/minimal_config/kernel.config ] ; then
   echo "Config file $SRC_DIR/minimal_config/kernel.config does not exist."
@@ -46,7 +46,7 @@ else
   sed -i "s/.*CONFIG_FB_VESA.*/CONFIG_FB_VESA=y/" .config
 
   # Read the 'USE_BOOT_LOGO' property from '.config'
-  USE_BOOT_LOGO="$(grep -i USE_BOOT_LOGO $SRC_DIR/.config | cut -f2 -d'=')"
+  USE_BOOT_LOGO="$(grep -i ^USE_BOOT_LOGO $SRC_DIR/.config | cut -f2 -d'=')"
 
   if [ "$USE_BOOT_LOGO" = "true" ] ; then
     sed -i "s/.*CONFIG_LOGO_LINUX_CLUT224.*/CONFIG_LOGO_LINUX_CLUT224=y/" .config

src/03_get_glibc.sh

@@ -5,13 +5,13 @@ echo "*** GET GLIBC BEGIN ***"
 SRC_DIR=$(pwd)
 
 # Grab everything after the '=' character.
-DOWNLOAD_URL=$(grep -i GLIBC_SOURCE_URL .config | cut -f2 -d'=')
+DOWNLOAD_URL=$(grep -i ^GLIBC_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="$(grep -i USE_LOCAL_SOURCE .config | cut -f2 -d'=')"
+USE_LOCAL_SOURCE="$(grep -i ^USE_LOCAL_SOURCE .config | cut -f2 -d'=')"
 
 if [ "$USE_LOCAL_SOURCE" = "true" -a ! -f $SRC_DIR/source/$ARCHIVE_FILE  ] ; then
   echo "Source bundle $SRC_DIR/source/$ARCHIVE_FILE is missing and will be downloaded."

src/06_get_busybox.sh

@@ -5,13 +5,13 @@ echo "*** GET BUSYBOX BEGIN ***"
 SRC_DIR=$(pwd)
 
 # Grab everything after the '=' character.
-DOWNLOAD_URL=$(grep -i BUSYBOX_SOURCE_URL .config | cut -f2 -d'=')
+DOWNLOAD_URL=$(grep -i ^BUSYBOX_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="$(grep -i USE_LOCAL_SOURCE .config | cut -f2 -d'=')"
+USE_LOCAL_SOURCE="$(grep -i ^USE_LOCAL_SOURCE .config | cut -f2 -d'=')"
 
 if [ "$USE_LOCAL_SOURCE" = "true" -a ! -f $SRC_DIR/source/$ARCHIVE_FILE  ] ; then
   echo "Source bundle $SRC_DIR/source/$ARCHIVE_FILE is missing and will be downloaded."

src/07_build_busybox.sh

@@ -20,7 +20,7 @@ echo "Preparing BusyBox work area. This may take a while..."
 make distclean
 
 # Read the 'USE_PREDEFINED_BUSYBOX_CONFIG' property from '.config'
-USE_PREDEFINED_BUSYBOX_CONFIG="$(grep -i USE_PREDEFINED_BUSYBOX_CONFIG $SRC_DIR/.config | cut -f2 -d'=')"
+USE_PREDEFINED_BUSYBOX_CONFIG="$(grep -i ^USE_PREDEFINED_BUSYBOX_CONFIG $SRC_DIR/.config | cut -f2 -d'=')"
 
 if [ "$USE_PREDEFINED_BUSYBOX_CONFIG" = "true" -a ! -f $SRC_DIR/minimal_config/busybox.config ] ; then
   echo "Config file $SRC_DIR/minimal_config/busybox.config does not exist."

src/09_generate_rootfs.sh

@@ -27,7 +27,7 @@ cd rootfs
 rm -f linuxrc
 
 # Read the 'COPY_SOURCE_ROOTFS' property from '.config'
-COPY_SOURCE_ROOTFS="$(grep -i COPY_SOURCE_ROOTFS $SRC_ROOT/.config | cut -f2 -d'=')"
+COPY_SOURCE_ROOTFS="$(grep -i ^COPY_SOURCE_ROOTFS $SRC_ROOT/.config | cut -f2 -d'=')"
 
 if [ "$COPY_SOURCE_ROOTFS" = "true" ] ; then
   # Copy all prepared source files and folders to '/src'. Note that the scripts

src/11_get_syslinux.sh

@@ -5,13 +5,13 @@ echo "*** GET SYSLINUX BEGIN ***"
 SRC_DIR=$(pwd)
 
 # Grab everything after the '=' character.
-DOWNLOAD_URL=$(grep -i SYSLINUX_SOURCE_URL .config | cut -f2 -d'=')
+DOWNLOAD_URL=$(grep -i ^SYSLINUX_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="$(grep -i USE_LOCAL_SOURCE .config | cut -f2 -d'=')"
+USE_LOCAL_SOURCE="$(grep -i ^USE_LOCAL_SOURCE .config | cut -f2 -d'=')"
 
 if [ "$USE_LOCAL_SOURCE" = "true" -a ! -f $SRC_DIR/source/$ARCHIVE_FILE  ] ; then
   echo "Source bundle $SRC_DIR/source/$ARCHIVE_FILE is missing and will be downloaded."

src/12_generate_iso.sh

@@ -29,7 +29,7 @@ mkdir work/isoimage
 echo "Prepared new ISO image work area."
 
 # Read the 'COPY_SOURCE_ISO' property from '.config'
-COPY_SOURCE_ISO="$(grep -i COPY_SOURCE_ISO .config | cut -f2 -d'=')"
+COPY_SOURCE_ISO="$(grep -i ^COPY_SOURCE_ISO .config | cut -f2 -d'=')"
 
 if [ "$COPY_SOURCE_ISO" = "true" ] ; then
   # Copy all prepared source files and folders to '/src'. Note that the scripts
@@ -41,7 +41,7 @@ else
 fi
 
 # Read the 'BUILD_OVERLAY_SOFTWARE' property from '.config'
-BUILD_OVERLAY_SOFTWARE="$(grep -i BUILD_OVERLAY_SOFTWARE .config | cut -f2 -d'=')"
+BUILD_OVERLAY_SOFTWARE="$(grep -i ^BUILD_OVERLAY_SOFTWARE .config | cut -f2 -d'=')"
 
 if [ "$BUILD_OVERLAY_SOFTWARE" = "true" ] ; then
   echo "Generating additional overlay software. This may take a while..."
@@ -64,7 +64,7 @@ cp $WORK_KERNEL_DIR/arch/x86/boot/bzImage ./kernel.xz
 cp ../rootfs.cpio.xz ./rootfs.xz
 
 # Read the 'OVERLAY_TYPE' property from '.config'
-OVERLAY_TYPE="$(grep -i OVERLAY_TYPE $SRC_DIR/.config | cut -f2 -d'=')"
+OVERLAY_TYPE="$(grep -i ^OVERLAY_TYPE $SRC_DIR/.config | cut -f2 -d'=')"
 
 if [ "$OVERLAY_TYPE" = "sparse" -a "$(id -u)" = "0" ] ; then
   # Use sparse file as storage place. The above check guarantees that the whole

src/build_minimal_linux_overlay.sh

@@ -1,8 +1,25 @@
 #!/bin/sh
 
-sh overlay_00_clean.sh
-sh overlay_01_get_links.sh
-sh overlay_02_build_links.sh
-sh overlay_03_get_dropbear.sh
-sh overlay_04_build_dropbear.sh
+# Read the 'OVERLAY_SOFTWARE' property from '.config'
+OVERLAY_SOFTWARE="$(grep -i ^OVERLAY_SOFTWARE .config | cut -f2 -d'=')"
+
+if [ "$OVERLAY_SOFTWARE" = "" ] ; then
+  echo "There is no overlay software to build."
+else
+  sh overlay_00_clean.sh
+
+  OVERLAY_PIECES="$(echo $OVERLAY_SOFTWARE | tr ',' ' ')"
+
+  for OVERLAY in $OVERLAY_PIECES
+  do
+    OVERLAY_SCRIPT=overlay_$OVERLAY.sh
+    
+    if [ ! -f $OVERLAY_SCRIPT ] ; then
+      echo "Error - cannot find overlay script file '$OVERLAY_SCRIPT'."
+    else
+      echo "Building '$OVERLAY'..."
+      sh $OVERLAY_SCRIPT
+    fi
+  done
+fi
 

src/overlay_00_clean.sh

@@ -20,7 +20,7 @@ for dir in $(ls -d */ 2>/dev/null) ; do
   echo "Overlay folder '$dir' has been removed."
 done
 
-echo "Ready to continue building the overlay software."
+echo "Ready to continue with the overlay software."
 
 cd $SRC_DIR
 

src/overlay_dropbear.sh

@@ -0,0 +1,5 @@
+#!/bin/sh
+
+sh overlay_dropbear_01_get.sh
+sh overlay_dropbear_02_build.sh
+

src/overlay_links.sh

@@ -0,0 +1,5 @@
+#!/bin/sh
+
+sh overlay_links_01_get.sh
+sh overlay_links_02_build.sh
+