mirror of
https://github.com/NixOS/nixos-hardware
synced 2025-01-15 13:29:47 +01:00
77 lines
2 KiB
Bash
77 lines
2 KiB
Bash
#! @bash@/bin/sh -e
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shopt -s nullglob
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export PATH=/empty
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for i in @path@; do PATH=$PATH:$i/bin; done
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usage() {
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echo "usage: $0 -c <path-to-default-configuration> -n <dtbName> [-g <num-generations>] [-d <target>]" >&2
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exit 1
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}
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target=/kboot.conf
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default= # Default configuration
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numGenerations=0 # Number of other generations to include in the menu
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while getopts "t:c:d:g:n:" opt; do
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case "$opt" in
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c) default="$OPTARG" ;;
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g) numGenerations="$OPTARG" ;;
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d) target="$OPTARG" ;;
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n) dtbName="$OPTARG" ;;
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\?) usage ;;
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esac
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done
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[ "$default" = "" -o "$dtbName" = "" ] && usage
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tmp=$target.tmp
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# Echo out an kboot.conf menu entry
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addEntry() {
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local path=$(readlink -f "$1")
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local tag="$2" # Generation number or 'default'
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if ! test -e $path/kernel -a -e $path/initrd; then
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return
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fi
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timestampEpoch=$(stat -L -c '%Z' $path)
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timestamp=$(date "+%Y-%m-%d %H:%M" -d @$timestampEpoch)
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nixosLabel="$(cat $path/nixos-version)"
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extraParams="$(cat $path/kernel-params)"
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local kernel=$(readlink -f "$path/kernel")
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local initrd=$(readlink -f "$path/initrd")
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local dtbs=$(readlink -f "$path/dtbs")
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local id="nixos-$tag--$nixosLabel"
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if [ "$tag" = "default" ]; then
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echo "default=$id"
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fi
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echo -n "$id='"
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echo -n "$kernel initrd=$initrd dtb=$dtbs/$dtbName "
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echo -n "systemConfig=$path init=$path/init $extraParams"
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echo "'"
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}
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echo "# Hola!" > $tmp
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addEntry $default default >> $tmp
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if [ "$numGenerations" -gt 0 ]; then
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# Add up to $numGenerations generations of the system profile to the menu,
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# in reverse (most recent to least recent) order.
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for generation in $(
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(cd /nix/var/nix/profiles && ls -d system-*-link) \
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| sed 's/system-\([0-9]\+\)-link/\1/' \
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| sort -n -r \
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| head -n $numGenerations); do
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link=/nix/var/nix/profiles/system-$generation-link
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addEntry $link $generation
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done >> $tmp
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fi
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mv -f $tmp $target
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