URI: 
       tapt caching proof of concept - libdevuansdk - common library for devuan's simple distro kits
  HTML git clone https://git.parazyd.org/libdevuansdk
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       ---
   DIR commit a92a5aee8dafe76cd0605d82521b0bd2b35c5204
   DIR parent fa06bc6308eee6da3aecce1d42cb59afcbe5ca3a
  HTML Author: parazyd <parazyd@dyne.org>
       Date:   Sun, 21 May 2017 19:11:10 +0200
       
       apt caching proof of concept
       
       Diffstat:
         A apt-cache/Packages.gz               |       0 
         M config                              |       7 +++++--
         M zlibs/bootstrap                     |       2 --
         M zlibs/helpers                       |      60 ++++++++++++++++++++++++++++++--
         M zlibs/iso                           |       1 -
         M zlibs/sysconf                       |       2 ++
       
       6 files changed, 65 insertions(+), 7 deletions(-)
       ---
   DIR diff --git a/apt-cache/Packages.gz b/apt-cache/Packages.gz
       Binary files differ.
   DIR diff --git a/config b/config
       t@@ -20,15 +20,18 @@
        ## libdevuansdk configuration
        
        vars+=(release version mirror section blend_name image_name vm_name)
       -vars+=(arch earch)
       +vars+=(arch earch aptcachedir APT_CACHE)
        vars+=(usercredentials rootcredentials)
        
        arrs+=(core_packages base_packages purge_packages blend_packages)
        
       +## enable local apt cache
       +APT_CACHE=1
       +aptcachedir="$LIBPATH/apt-cache"
        
        os="devuan"
        release="jessie"
       -version="1.0.0-RC2"
       +version="1.0.0"
        mirror="http://auto.mirror.devuan.org/merged"
        section="main"
        
   DIR diff --git a/zlibs/bootstrap b/zlibs/bootstrap
       t@@ -100,7 +100,6 @@ apt-get --yes --force-yes install ${core_packages}
        apt-get --yes --force-yes install ${base_packages}
        apt-get --yes --force-yes purge  ${purge_packages}
        apt-get --yes --force-yes autoremove
       -apt-get clean
        
        rm -f /debconf.set
        rm -f /etc/ssh/ssh_host_*
       t@@ -174,7 +173,6 @@ done
        apt-get --yes --force-yes upgrade
        apt-get --yes --force-yes install ${extra_packages}
        apt-get --yes --force-yes autoremove
       -apt-get clean
        EOF
        
                chroot-script -d postunpack || zerr
   DIR diff --git a/zlibs/helpers b/zlibs/helpers
       t@@ -60,6 +60,7 @@ build_iso_dist() {
                iso_write_isolinux_cfg  || { zerr; wrapup }
                #[[ $INSTALLER = 1 ]] && iso_setup_installer || zerr
                blend_postinst          || { zerr; wrapup }
       +        fill_apt_cache          || { zerr; wrapup }
                iso_squash_strap        || { zerr; wrapup }
                iso_xorriso_build       || { zerr; wrapup }
        }
       t@@ -257,7 +258,6 @@ for deb in ${custom_deb_packages}; do
        done
        cd /
        apt-get autoremove
       -apt-get clean
        rm -rf /debs
        EOF
                chroot-script install-debs
       t@@ -269,6 +269,7 @@ chroot-script() {
                ckreq || return 1
        
                mkdir -p "$R/log"
       +
                case "x$1" in
                        x-d)
                                local script="$2"
       t@@ -278,6 +279,7 @@ chroot-script() {
                                ## logging
                                sudo sed -i "$strapdir/$script" \
                                        -e 's@#!/bin/sh@#!/bin/sh\'$'\nset -x ; exec 2>/'$script'.log@'
       +
                                notice "chrooting to execute $script..."
                                sudo chmod +x  "$strapdir/$script"    || zerr
                                sudo -E chroot "$strapdir" "/$script" || zerr
       t@@ -288,15 +290,18 @@ chroot-script() {
                                ;;
                        *)
                                local script="$1"
       +                        [[ "$APT_CACHE" = 1 ]] && { aptcache on "$strapdir/mnt"  || zerr }
        
                                ## logging
                                sudo sed -i "$strapdir/$script" \
                                        -e 's@#!/bin/sh@#!/bin/sh\'$'\nset -x ; exec 2>/'$script'.log@'
        
                                notice "chrooting to execute $script..."
       -                        sudo chmod +x  "$strapdir/$script" || zerr
       +                        sudo chmod +x  "$strapdir/$script"    || zerr
                                sudo -E chroot "$strapdir" "/$script" || zerr
                                sudo mv -f "$strapdir/${script}.log" "$R/log/"
       +
       +                        [[ "$APT_CACHE" = 1 ]] && { aptcache off "$strapdir/mnt" || zerr }
                                ;;
                esac
        
       t@@ -352,6 +357,57 @@ blend_postinst() {
                return 0
        }
        
       +aptcache() {
       +        fn aptcache "$*"
       +        req=(aptcachedir watdo werdo APT_CACHE)
       +        local watdo="$1"
       +        local werdo="$2"
       +        ckreq || return 1
       +
       +        [[ $APT_CACHE = 1 ]] || return 0
       +
       +        case "$watdo" in
       +                on)
       +                        act "mounting local apt cache"
       +                        sudo mount -o bind "$aptcachedir" "$werdo" || zerr
       +                        ;;
       +                off)
       +                        act "umounting local apt cache"
       +                        sudo umount "$werdo" || zerr
       +                        ;;
       +        esac
       +}
       +
       +fill_apt_cache() {
       +        fn fill_apt_cache
       +        req=(strapdir APT_CACHE)
       +        ckreq || return 1
       +
       +        [[ $APT_CACHE = 1 ]] || return 0
       +
       +        notice "filling local apt cache"
       +
       +        cat <<EOF | sudo tee ${strapdir}/fill-apt-cache >/dev/null
       +#!/bin/sh
       +
       +# NOTE: do we need apt update or does it read the remote(s)?
       +apt-get update
       +apt-get install dpkg-dev
       +
       +cp -afv /var/cache/apt/archives/*.deb /mnt
       +cd /mnt
       +dpkg-scanpackages . /dev/null | gzip -9c > Packages.gz
       +cd -
       +
       +apt-get purge dpkg-dev
       +
       +sed -i -e "@deb file:/mnt@d" /etc/apt/sources.list
       +apt-get update
       +
       +EOF
       +        chroot-script fill-apt-cache || zerr
       +}
       +
        silly() {
                fn silly "$@"
                local arg1="$1"
   DIR diff --git a/zlibs/iso b/zlibs/iso
       t@@ -33,7 +33,6 @@ iso_prepare_strap() {
        apt-get update
        apt-get --yes --force-yes install dialog live-boot live-boot-initramfs-tools
        apt-get --yes --force-yes autoremove
       -apt-get clean
        EOF
        
                chroot-script -d isoprep    || zerr
   DIR diff --git a/zlibs/sysconf b/zlibs/sysconf
       t@@ -118,6 +118,8 @@ conf_print_sourceslist() {
                ckreq || return 1
        
                cat <<EOF
       +deb file:/mnt ./
       +
        ## package repositories
        deb ${mirror} ${release} ${section}
        deb ${mirror} ${release}-updates ${section}