The ISO image generation logic has been split in multiple scripts.
This commit is contained in:
Ivan Davidov
parent
bafad2d9e1
commit
1943629bb4
92
src/11_generate_overlay.sh
Executable file
92
src/11_generate_overlay.sh
Executable file
@ -0,0 +1,92 @@
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#!/bin/sh
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set -e
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echo "*** GENERATE OVERLAY BEGIN ***"
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SRC_DIR=$(pwd)
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# Remove the old ISO generation area if it exists.
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echo "Removing old overlay area. This may take a while."
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rm -rf work/isoimage_overlay
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mkdir -p work/isoimage_overlay
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cd work/isoimage_overlay
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# Read the 'OVERLAY_TYPE' property from '.config'
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OVERLAY_TYPE="$(grep -i ^OVERLAY_TYPE $SRC_DIR/.config | cut -f2 -d'=')"
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# Read the 'OVERLAY_LOCATION' property from '.config'
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OVERLAY_LOCATION="$(grep -i ^OVERLAY_LOCATION $SRC_DIR/.config | cut -f2 -d'=')"
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if [ "$OVERLAY_LOCATION" = "iso" \
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-a "$OVERLAY_TYPE" = "sparse" \
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-a -d $SRC_DIR/work/overlay_rootfs \
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-a "$(id -u)" = "0" ] ; then
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# Use sparse file as storage place. The above check guarantees that the whole
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# script is executed with root permissions or otherwise this block is skipped.
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# All files and folders located in the folder 'minimal_overlay' will be merged
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# with the root folder on boot.
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echo "Using sparse file for overlay."
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# This is the BusyBox executable that we have already generated.
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BUSYBOX=../rootfs/bin/busybox
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# Create sparse image file with 1MB size. Note that this increases the ISO
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# image size.
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$BUSYBOX truncate -s 1M minimal.img
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# Find available loop device.
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LOOP_DEVICE=$($BUSYBOX losetup -f)
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# Associate the available loop device with the sparse image file.
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$BUSYBOX losetup $LOOP_DEVICE minimal.img
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# Format the sparse image file with Ext2 file system.
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$BUSYBOX mkfs.ext2 $LOOP_DEVICE
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# Mount the sparse file in folder 'sparse".
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mkdir sparse
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$BUSYBOX mount minimal.img sparse
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# Create the overlay folders.
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mkdir -p sparse/rootfs
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mkdir -p sparse/work
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# Copy the overlay content.
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cp -r $SRC_DIR/overlay_rootfs/* sparse/rootfs
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cp -r $SRC_DIR/minimal_overlay/rootfs/* sparse/rootfs
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# Unmount the sparse file and delete the temporary folder.
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$BUSYBOX umount sparse
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rm -rf sparse
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# Detach the loop device since we no longer need it.
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$BUSYBOX losetup -d $LOOP_DEVICE
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echo "Applying original ownership to all affected files and folders."
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chown -R $(logname) .
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elif [ "$OVERLAY_LOCATION" = "iso" \
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-a "$OVERLAY_TYPE" = "folder" \
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-a -d $SRC_DIR/work/overlay_rootfs ] ; then
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# Use normal folder structure for overlay. All files and folders located in
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# the folder 'minimal_overlay' will be merged with the root folder on boot.
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echo "Using folder structure for overlay."
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# Create the overlay folders.
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mkdir -p minimal/rootfs
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mkdir -p minimal/work
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# Copy the overlay content.
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cp -rf $SRC_DIR/work/overlay_rootfs/* minimal/rootfs
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cp -r $SRC_DIR/minimal_overlay/rootfs/* minimal/rootfs
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else
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echo "The ISO image will have no overlay structure."
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fi
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cd $SRC_DIR
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echo "*** GENERATE OVERLAY END ***"
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@ -1,175 +0,0 @@
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#!/bin/sh
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set -e
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# TODO - this shell script file needs serios refactoring since right now it does
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# too many things:
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#
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# 1) Create proper overlay structure.
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# 2) Prepare the actual ISO structure.
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# 3) Generate the actual ISO image.
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#
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# Probably it's best to create separate shell scripts for each functionality.
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echo "*** GENERATE ISO BEGIN ***"
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SRC_DIR=$(pwd)
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# Save the kernel installation directory.
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KERNEL_INSTALLED=$SRC_DIR/work/kernel/kernel_installed
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# Find the Syslinux build directory.
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cd work/syslinux
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cd $(ls -d *)
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WORK_SYSLINUX_DIR=$(pwd)
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cd $SRC_DIR
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# Remove the old ISO file if it exists.
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rm -f minimal_linux_live.iso
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echo "Old ISO image file has been removed."
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# Remove the old ISO generation area if it exists.
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echo "Removing old ISO image work area. This may take a while..."
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rm -rf work/isoimage
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# This is the root folder of the ISO image.
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mkdir work/isoimage
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echo "Prepared new ISO image work area."
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# Read the 'COPY_SOURCE_ISO' property from '.config'
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COPY_SOURCE_ISO="$(grep -i ^COPY_SOURCE_ISO .config | cut -f2 -d'=')"
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cd work/isoimage
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# Now we copy the kernel.
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cp $KERNEL_INSTALLED/kernel ./kernel.xz
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# Now we copy the root file system.
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cp ../rootfs.cpio.xz ./rootfs.xz
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# Read the 'OVERLAY_TYPE' property from '.config'
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OVERLAY_TYPE="$(grep -i ^OVERLAY_TYPE $SRC_DIR/.config | cut -f2 -d'=')"
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# Read the 'OVERLAY_LOCATION' property from '.config'
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OVERLAY_LOCATION="$(grep -i ^OVERLAY_LOCATION $SRC_DIR/.config | cut -f2 -d'=')"
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if [ "$OVERLAY_LOCATION" = "iso" \
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-a "$OVERLAY_TYPE" = "sparse" \
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-a -d $SRC_DIR/work/overlay_rootfs \
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-a "$(id -u)" = "0" ] ; then
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# Use sparse file as storage place. The above check guarantees that the whole
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# script is executed with root permissions or otherwise this block is skipped.
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# All files and folders located in the folder 'minimal_overlay' will be merged
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# with the root folder on boot.
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echo "Using sparse file for overlay."
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# This is the BusyBox executable that we have already generated.
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BUSYBOX=../rootfs/bin/busybox
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# Create sparse image file with 1MB size. Note that this increases the ISO
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# image size.
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$BUSYBOX truncate -s 1M minimal.img
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# Find available loop device.
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LOOP_DEVICE=$($BUSYBOX losetup -f)
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# Associate the available loop device with the sparse image file.
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$BUSYBOX losetup $LOOP_DEVICE minimal.img
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# Format the sparse image file with Ext2 file system.
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$BUSYBOX mkfs.ext2 $LOOP_DEVICE
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# Mount the sparse file in folder 'sparse".
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mkdir sparse
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$BUSYBOX mount minimal.img sparse
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# Create the overlay folders.
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mkdir -p sparse/rootfs
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mkdir -p sparse/work
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# Copy the overlay content.
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cp -r $SRC_DIR/overlay_rootfs/* sparse/rootfs
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cp -r $SRC_DIR/minimal_overlay/rootfs/* sparse/rootfs
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# Unmount the sparse file and delete the temporary folder.
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$BUSYBOX umount sparse
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rm -rf sparse
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# Detach the loop device since we no longer need it.
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$BUSYBOX losetup -d $LOOP_DEVICE
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elif [ "$OVERLAY_LOCATION" = "iso" \
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-a "$OVERLAY_TYPE" = "folder" \
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-a -d $SRC_DIR/work/overlay_rootfs ] ; then
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# Use normal folder structure for overlay. All files and folders located in
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# the folder 'minimal_overlay' will be merged with the root folder on boot.
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echo "Using folder structure for overlay."
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# Create the overlay folders.
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mkdir -p minimal/rootfs
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mkdir -p minimal/work
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# Copy the overlay content.
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cp -rf $SRC_DIR/work/overlay_rootfs/* minimal/rootfs
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cp -r $SRC_DIR/minimal_overlay/rootfs/* minimal/rootfs
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else
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echo "The ISO image will have no overlay structure."
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fi
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# Copy the precompiled files 'isolinux.bin' and 'ldlinux.c32' in the ISO image
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# root folder.
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cp $WORK_SYSLINUX_DIR/bios/core/isolinux.bin .
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cp $WORK_SYSLINUX_DIR/bios/com32/elflink/ldlinux/ldlinux.c32 .
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# Create the ISOLINUX configuration file.
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echo 'default kernel.xz initrd=rootfs.xz vga=ask' > ./syslinux.cfg
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# Create UEFI start script.
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mkdir -p efi/boot
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cat << CEOF > ./efi/boot/startup.nsh
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echo -off
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echo Minimal Linux Live is starting...
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\\kernel.xz initrd=\\rootfs.xz
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CEOF
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# Now we generate the ISO image file.
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xorriso \
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-as mkisofs \
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-R \
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-r \
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-o ../minimal_linux_live.iso \
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-b isolinux.bin \
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-c boot.cat \
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-input-charset UTF-8 \
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-no-emul-boot \
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-boot-load-size 4 \
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-boot-info-table \
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./
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# Copy the ISO image to the root project folder.
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cp ../minimal_linux_live.iso ../../
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if [ "$(id -u)" = "0" ] ; then
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# Apply ownership back to original owner for all affected files.
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chown $(logname) ../../minimal_linux_live.iso
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chown $(logname) ../../work/minimal_linux_live.iso
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chown -R $(logname) .
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echo "Applied original ownership to all affected files and folders."
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fi
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cd $SRC_DIR
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cat << CEOF
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#################################################################
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# #
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# ISO image file 'minimal_linux_live.iso' has been generated. #
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# #
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#################################################################
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CEOF
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echo "*** GENERATE ISO END ***"
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@ -30,7 +30,7 @@ else
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fi
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# Delete folder with previously extracted Syslinux.
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echo "Removing SYSLINUX work area. This may take a while..."
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echo "Removing SYSLINUX work area. This may take a while."
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rm -rf ../work/syslinux
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mkdir ../work/syslinux
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62
src/13_prepare_iso.sh
Executable file
62
src/13_prepare_iso.sh
Executable file
@ -0,0 +1,62 @@
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#!/bin/sh
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set -e
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echo "*** PREPARE ISO BEGIN ***"
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SRC_DIR=$(pwd)
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# Save the kernel installation directory.
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KERNEL_INSTALLED=$SRC_DIR/work/kernel/kernel_installed
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# Find the Syslinux build directory.
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cd work/syslinux
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cd $(ls -d *)
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WORK_SYSLINUX_DIR=$(pwd)
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cd $SRC_DIR
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# Remove the old ISO generation area if it exists.
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echo "Removing old ISO image work area. This may take a while."
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rm -rf work/isoimage
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# This is the root folder of the ISO image.
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echo "Preparing new ISO image work area."
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mkdir work/isoimage
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cd work/isoimage
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# Now we copy the kernel.
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cp $KERNEL_INSTALLED/kernel ./kernel.xz
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# Now we copy the root file system.
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cp ../rootfs.cpio.xz ./rootfs.xz
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# Now we copy the overlay content if it exists
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if [ -d $SRC_DIR/work/isoimage_overlay \
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-a ! "`ls $SRC_DIR/work/isoimage_overlay`" = "" ] ; then
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echo "The ISO image will have overlay structure."
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cp -r $SRC_DIR/work/isoimage_overlay/* .
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else
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echo "The ISO image will have no overlay structure."
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fi
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# Copy the precompiled files 'isolinux.bin' and 'ldlinux.c32' in the ISO image
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# root folder.
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cp $WORK_SYSLINUX_DIR/bios/core/isolinux.bin .
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cp $WORK_SYSLINUX_DIR/bios/com32/elflink/ldlinux/ldlinux.c32 .
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# Create the ISOLINUX configuration file.
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echo 'default kernel.xz initrd=rootfs.xz vga=ask' > ./syslinux.cfg
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# Create UEFI start script.
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mkdir -p efi/boot
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cat << CEOF > ./efi/boot/startup.nsh
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echo -off
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echo Minimal Linux Live is starting.
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\\kernel.xz initrd=\\rootfs.xz
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CEOF
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cd $SRC_DIR
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echo "*** PREPARE ISO END ***"
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45
src/14_generate_iso.sh
Executable file
45
src/14_generate_iso.sh
Executable file
@ -0,0 +1,45 @@
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#!/bin/sh
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set -e
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echo "*** GENERATE ISO BEGIN ***"
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SRC_DIR=$(pwd)
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if [ ! -d $SRC_DIR/work/isoimage ] ; then
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echo "Cannot locate ISO image work folder. Cannot continue."
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exit 1
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fi
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cd $SRC_DIR/work/isoimage
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# Now we generate the ISO image file.
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xorriso \
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-as mkisofs \
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-R \
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-r \
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-o ../minimal_linux_live.iso \
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-b isolinux.bin \
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-c boot.cat \
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-input-charset UTF-8 \
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-no-emul-boot \
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-boot-load-size 4 \
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-boot-info-table \
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./
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# Copy the ISO image to the root project folder.
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cp ../minimal_linux_live.iso ../../
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cd $SRC_DIR
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cat << CEOF
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#################################################################
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# #
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# ISO image file 'minimal_linux_live.iso' has been generated. #
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# #
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#################################################################
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CEOF
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echo "*** GENERATE ISO END ***"
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@ -10,5 +10,7 @@ set -e
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./08_prepare_bundles.sh
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./09_generate_rootfs.sh
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./10_pack_rootfs.sh
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./12_generate_iso.sh
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./13_generate_image.sh
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./11_generate_overlay.sh
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./13_prepare_iso.sh
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./14_generate_iso.sh
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./15_generate_image.sh
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