forked from mirrors/nixpkgs
53 lines
1,012 B
Bash
53 lines
1,012 B
Bash
#! @bash@/bin/sh -e
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default=$1
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if test -z "$1"; then
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echo "Syntax: grub-menu-builder.sh <DEFAULT-CONFIG>"
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exit 1
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fi
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target=/boot/grub/menu.lst
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tmp=$target.tmp
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cat > $tmp << GRUBEND
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# Automatically generated. DO NOT EDIT THIS FILE!
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default=0
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timeout=5
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GRUBEND
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addEntry() {
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name="$1"
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path="$2"
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cat >> $tmp << GRUBEND
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title $name
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GRUBEND
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#cat $path/menu.lst >> $tmp
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grep -v "title \|default=\|timeout=" < $path/menu.lst >> $tmp
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}
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if test -n "$tmp"; then
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addEntry "NixOS - Default" $default
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fi
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# Add all generations of the system profile to the menu, in reverse
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# (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); do
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echo $generation
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link=/nix/var/nix/profiles/system-$generation-link
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date=$(stat --printf="%y\n" $link | sed 's/\..*//')
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addEntry "NixOS - Configuration $generation ($date)" $link
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done
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cp $tmp $target
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