Add slackware-current makechroot-minimal.sh

15.0/makechroot-minimal.sh

@@ -0,0 +1,148 @@
+#!/bin/sh
+set -eu
+
+if [ "$(id -u)" != 0 ]; then
+    echo "This script needs root permissions!" 1>&2
+    exit 1
+fi
+
+if [ "$#" -lt 1 ]; then
+    echo "Usage: $0 [-a arch] [-m mirror] <chroot>" 1>&2
+    exit 1
+fi
+
+
+arch="$(uname -m)"
+mirror='https://mirrors.slackware.com/slackware/slackware64-current'
+
+# Minimal amount of packages required to run installpkg, removepkg, upgradepkg, explodepkg and makepkg
+# All of these exist in the 'a' package set
+packages_pkgtools='
+aaa_base
+aaa_elflibs
+bash
+coreutils
+etc
+findutils
+glibc-solibs
+grep
+pkgtools
+sed
+tar
+util-linux
+which
+xz
+'
+
+# Minimal amount of packages required to run slackpkg without the dialog interface
+# Supporting https, gpg, and upgrade-all.
+# These exist over the 'a', 'ap', 'n' and 'l' package sets
+# ca-certificates needs to be installed after openssl for the doinst.sh to run correctly
+packages_extra='
+bzip2
+diffutils
+gawk
+gnupg
+gzip
+libpsl
+libunistring
+pcre2
+slackpkg
+wget
+
+openssl
+ca-certificates
+'
+
+# Parse arguments
+while getopts "a:m:" opt; do
+    case "$opt" in
+        a) arch="$OPTARG" ;;
+        m)
+            if [ -d "$OPTARG" ]; then
+                mirror="$(realpath "$OPTARG")"
+            else
+                mirror="$OPTARG"
+            fi
+            ;;
+    esac
+done
+shift $(expr $OPTIND - 1)
+[ "$#" -ge 1 ] && [ "$1" = "--" ] && shift
+
+# Build final variables
+case "$arch" in
+    x86_64)
+        pkgmain='slackware64'
+        ;;
+
+    *)
+        pkgmain='slackware'
+        ;;
+esac
+initrd='isolinux/initrd.img'
+checksums='CHECKSUMS.md5'
+chroot="$(realpath "$1")"
+
+# Create working directory
+temp="$(mktemp -d -t "$(basename "$0")".XXXXXX)"
+cleanup() {
+    if mountpoint -q "$temp/mnt/pkg"; then
+        umount "$temp/mnt/pkg"
+        rmdir "$temp/mnt/pkg"
+    fi
+    mountpoint -q "$temp/mnt" && umount "$temp/mnt"
+    rm -rf "$temp"
+}
+trap 'cleanup' EXIT
+cd "$temp"
+
+# Function to download (or copy) a file
+get() {
+    if [ -d "$mirror" ]; then
+        cp "$mirror/$1" "$2"
+    else
+        wget "$mirror/$1" -O "$2"
+    fi
+}
+
+# Function to verify files based on the checksums file
+check() {
+    printf '%s' "$(tail +13 CHECKSUMS.md5 | grep "^[0-9a-f]*  ./$1$" | cut -d ' ' -f 1)  $2" | md5sum -c --quiet -
+}
+
+# Get the full path to a package
+package() {
+    tail +13 CHECKSUMS.md5 | grep "^[0-9a-f]*  ./$pkgmain/[^/]*/$1-[^-]*-[^-]*-[^-]*\.t.z$" | cut -d ' ' -f 3- | cut -c 3-
+}
+
+# Download checksums
+get "$checksums" CHECKSUMS.md5
+
+# Download installer initrd.img
+get "$initrd" initrd.img
+check "$initrd" initrd.img
+
+# Unpack and prepare the installer
+xz -cd initrd.img | cpio -id
+rm -f initrd.img
+mkdir -p pkg "$chroot"
+mount --bind "$chroot" mnt
+mkdir -p mnt/pkg
+mount --bind pkg mnt/pkg
+
+# Download packages
+for pkg in $packages_pkgtools $packages_extra; do
+    path="$(package "$pkg")"
+    name="$(basename "$path")"
+    get "$path" "pkg/$name"
+    check "$path" "pkg/$name"
+done
+for pkg in $packages_pkgtools; do echo "$(basename "$(package "$pkg")")" >> pkg/__; done
+for pkg in $packages_extra; do echo "$(basename "$(package "$pkg")")" >> pkg/_; done
+
+# Bootstrap pkgtools and its dependencies
+env -i chroot . sh -l -c 'while read pkg; do /sbin/installpkg --root /mnt --terse "/pkg/$pkg"; done < /pkg/__'
+
+# Install slackpkg and its dependencies
+env -i chroot mnt sh -l -c 'while read pkg; do /sbin/installpkg --terse "/pkg/$pkg"; done < /pkg/_'