2slackware2sb

#!/bin/bash
# 
# Author: simargl <https://github.com/simargl>
# License: GPL v3

STARTDIR="/tmp"
OUTPUTDIR="/tmp/output"
SCRIPTSDIR="$PWD/scripts/slackware"

fn_download_and_extract() {
    install -Dm755 $SCRIPTSDIR/{crux2slack,fetch} /usr/bin/
    cp $SCRIPTSDIR/{part1,part2,part3} $STARTDIR
    if [[ $1 != "-c" ]]; then cp $SCRIPTSDIR/part4 $STARTDIR; fi
    cd $STARTDIR
    if [ -d root.x86_64 ]; then rm -r root.x86_64; fi
    rm *.t?z 2>/dev/null
    fetch up; fetch cc; fetch dl $(cat part1 | tr '\n' ' ')
    mv /var/cache/slackware/* .; fetch xa; mv install root.x86_64
    rm *.t?z 2>/dev/null
}

fn_build_rootfs() {
    # prepare
    cd $STARTDIR
    cp /etc/resolv.conf root.x86_64/etc/
    cp /usr/bin/{crux2slack,fetch} $STARTDIR/root.x86_64/usr/bin/
    mknod -m 666 root.x86_64/dev/null c 1 3
    chroot $STARTDIR/root.x86_64/ /bin/bash -c "fetch up"
    chroot $STARTDIR/root.x86_64/ /bin/bash -c "fetch it $(cat $STARTDIR/part2 | tr '\n' ' '); fetch cc"
    chroot $STARTDIR/root.x86_64/ /bin/bash -c "fetch it $(cat $STARTDIR/part3 | tr '\n' ' '); fetch cc"
    if [[ $1 != "-c" ]]; then 
        chroot $STARTDIR/root.x86_64/ /bin/bash -c "fetch it $(cat $STARTDIR/part4 | tr '\n' ' '); fetch cc"
    fi
    chroot $STARTDIR/root.x86_64/ /bin/bash -c "update-ca-certificates -f"
    # cache
    rm -r $STARTDIR/root.x86_64/usr/share/mime/globs
    rm -r $STARTDIR/root.x86_64/usr/share/icons/hicolor/icon-theme.cache
    rm -r $STARTDIR/root.x86_64/usr/share/glib-2.0/schemas/gschemas.compiled
    rm -r $STARTDIR/root.x86_64/usr/lib64/gdk-pixbuf-2.0/2.10.0/loaders.cache
    # other
    rm -r $STARTDIR/root.x86_64/usr/{doc,info,man}
    rm -r $STARTDIR/root.x86_64/usr/share/{gtk-doc,locale}
    rm -r $STARTDIR/root.x86_64/etc/asound.conf
    find $STARTDIR/root.x86_64/usr/share/applications -type f -not -name transmission-gtk.desktop | xargs rm
    install -Dm644 $SCRIPTSDIR/fetch-gui.desktop $STARTDIR/root.x86_64/usr/share/applications/
    install -Dm755 $SCRIPTSDIR/fetch-gui.py $STARTDIR/root.x86_64/usr/bin/
    # static libs
    find $STARTDIR/root.x86_64/usr/lib64 -maxdepth 2 -name *.a -not -name libanl.a \
    -not -name libc.a -not -name libc_nonshared.a -not -name libcrypt.a -not -name libdl.a \
    -not -name libg.a -not -name libm.a -not -name libpthread.a -not -name libresolv.a \
    -not -name librt.a -not -name libutil.a -not -name libfltk* | xargs rm
    # clang
    rm -r $STARTDIR/root.x86_64/usr/bin/{c-index-test,clang*,llvm*,obj2yaml,mlir*}
    rm -r $STARTDIR/root.x86_64/usr/include/clang*
    rm -r $STARTDIR/root.x86_64/usr/lib64/{libclang*,libMLIR*,clang}
    # more removal
    rm -r $STARTDIR/root.x86_64/usr/share/{doc,libwacom,samba,vulkan}
    rm -r $STARTDIR/root.x86_64/usr/lib64/{d3d,gallium-pipe,libdxcompiler.so,libRusticl*,libVkLayer*,liblldb*}
    rm -r $STARTDIR/root.x86_64/usr/libexec/samba
    rm -r $STARTDIR/root.x86_64/usr/bin/{smbtorture,gfxrecon*,dwp,gtk3-demo*}
    chroot /tmp/root.x86_64 /bin/bash -c 'find /usr/bin -type f -exec sh -c '\''if ldd "$1" 2>&1 | grep -q "not found"; then rm "$1"; fi'\'' _ {} \;'
    chroot /tmp/root.x86_64 /bin/bash -c 'find /usr/libexec -type f -exec sh -c '\''if ldd "$1" 2>&1 | grep -q "not found"; then rm "$1"; fi'\'' _ {} \;'
    # python cleanup
    find $STARTDIR/root.x86_64 -type f -name "*.pyc" -delete
    find $STARTDIR/root.x86_64 -type f -name "*.pyo" -delete
}

fn_compress_rootfs() {
    cd $STARTDIR
    if [ ! -d $OUTPUTDIR ]; then mkdir -p $OUTPUTDIR; fi
    if [ -f $OUTPUTDIR/fs-slackware.sb ]; then rm $OUTPUTDIR/fs-slackware.sb; fi
    mksquashfs root.x86_64/ $OUTPUTDIR/fs-slackware.sb -comp gzip -b 1024k
}

fn_download_and_extract $@
fn_build_rootfs $@
fn_compress_rootfs