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#
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# Reduce system disk usage
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#
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# Load utility functions
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. ./functions.sh
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# Reduce the image size by various operations
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if [ "$ENABLE_REDUCE" = true ] ; then
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if [ "$REDUCE_APT" = true ] ; then
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# Install dpkg configuration file
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if [ "$REDUCE_DOC" = true ] || [ "$REDUCE_MAN" = true ] ; then
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install_readonly files/dpkg/01nodoc "${ETC_DIR}/dpkg/dpkg.cfg.d/01nodoc"
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fi
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# Install APT configuration files
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install_readonly files/apt/02nocache "${ETC_DIR}/apt/apt.conf.d/02nocache"
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install_readonly files/apt/03compress "${ETC_DIR}/apt/apt.conf.d/03compress"
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install_readonly files/apt/04norecommends "${ETC_DIR}/apt/apt.conf.d/04norecommends"
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# Remove APT cache files
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rm -fr "${R}/var/cache/apt/pkgcache.bin"
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rm -fr "${R}/var/cache/apt/srcpkgcache.bin"
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fi
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# Remove all doc files
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if [ "$REDUCE_DOC" = true ] ; then
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find "${R}/usr/share/doc" -depth -type f ! -name copyright -print0 | xargs -0 rm || true
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find "${R}/usr/share/doc" -empty -print0 | xargs -0 rmdir || true
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fi
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# Remove all man pages and info files
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if [ "$REDUCE_MAN" = true ] ; then
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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"
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fi
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# Remove all locale translation files
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if [ "$REDUCE_LOCALE" = true ] ; then
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find "${R}/usr/share/locale" -mindepth 1 -maxdepth 1 ! -name 'en' -print0 | xargs -0 rm -r
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fi
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# Remove hwdb PCI device classes (experimental)
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if [ "$REDUCE_HWDB" = true ] ; then
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rm -fr "/lib/udev/hwdb.d/20-pci-*"
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fi
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# Replace bash shell by dash shell (experimental)
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if [ "$REDUCE_BASH" = true ] ; then
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if [ "$RELEASE" = "stretch" ] || [ "$RELEASE" = "buster" ] ; then
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echo "Yes, do as I say!" | chroot_exec apt-get purge -qq -y --allow-remove-essential bash
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else
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echo "Yes, do as I say!" | chroot_exec apt-get purge -qq -y --force-yes bash
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fi
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chroot_exec update-alternatives --install /bin/bash bash /bin/dash 100
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fi
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# Remove sound utils and libraries
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if [ "$ENABLE_SOUND" = false ] ; then
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chroot_exec apt-get -qq -y purge alsa-utils libsamplerate0 libasound2 libasound2-data
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fi
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# Re-install tools for managing kernel modules
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if [ "$RELEASE" = "jessie" ] ; then
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chroot_exec apt-get -qq -y install module-init-tools
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fi
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# Remove GPU kernels
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if [ "$ENABLE_MINGPU" = true ] ; then
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rm -f "${BOOT_DIR}/start.elf"
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rm -f "${BOOT_DIR}/fixup.dat"
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rm -f "${BOOT_DIR}/start_x.elf"
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rm -f "${BOOT_DIR}/fixup_x.dat"
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fi
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# Remove kernel and initrd from /boot (already in /boot/firmware)
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if [ "$BUILD_KERNEL" = false ] ; then
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rm -f "${R}/boot/vmlinuz-*"
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rm -f "${R}/boot/initrd.img-*"
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fi
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# Clean APT list of repositories
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rm -fr "${R}/var/lib/apt/lists/*"
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chroot_exec apt-get -qq -y update
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fi
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