131 lines
4 KiB
Bash
131 lines
4 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:$i/sbin; done
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default=$1
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if test -z "$1"; then
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echo "Syntax: efi-boot-stub-builder.sh <DEFAULT-CONFIG>"
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exit 1
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fi
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echo "updating the efi system partition..."
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# Convert a path to a file in the Nix store such as
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# /nix/store/<hash>-<name>/file to <hash>-<name>-<file>.
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# Also, efi executables need the .efi extension
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cleanName() {
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local path="$1"
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echo "$path" | sed 's|^/nix/store/||' | sed 's|/|-|g' | sed 's|@kernelFile@$|@kernelFile@.efi|'
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}
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# Copy a file from the Nix store to the EFI system partition
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declare -A filesCopied
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copyToKernelsDir() {
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local src="$1"
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local dst="@efiSysMountPoint@/efi/nixos/$(cleanName $src)"
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# Don't copy the file if $dst already exists. This means that we
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# have to create $dst atomically to prevent partially copied
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# kernels or initrd if this script is ever interrupted.
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if ! test -e $dst; then
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local dstTmp=$dst.tmp.$$
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cp $src $dstTmp
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mv $dstTmp $dst
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fi
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filesCopied[$dst]=1
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result=$dst
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}
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# Copy its kernel, initrd, and startup script to the efi system partition
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# Add the efibootmgr entry if requested
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addEntry() {
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local path="$1"
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local generation="$2"
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if ! test -e $path/kernel -a -e $path/initrd; then
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return
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fi
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local kernel=$(readlink -f $path/kernel)
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local initrd=$(readlink -f $path/initrd)
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copyToKernelsDir $kernel; kernel=$result
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copyToKernelsDir $initrd; initrd=$result
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local startup="@efiSysMountPoint@/efi/nixos/generation-$generation-startup.nsh"
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if ! test -e $startup; then
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local dstTmp=$startup.tmp.$$
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echo "$(echo $kernel | sed 's|@efiSysMountPoint@||' | sed 's|/|\\|g') systemConfig=$(readlink -f $path) init=$(readlink -f $path/init) initrd=$(echo $initrd | sed 's|@efiSysMountPoint@||' | sed 's|/|\\|g') $(cat $path/kernel-params)" > $dstTmp
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mv $dstTmp $startup
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fi
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filesCopied[$startup]=1
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if test -n "@runEfibootmgr@"; then
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set +e
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efibootmgr -c -d "@efiDisk@" -g -l $(echo $kernel | sed 's|@efiSysMountPoint@||' | sed 's|/|\\|g') -L "NixOS $generation Generation" -p "@efiPartition@" \
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-u systemConfig=$(readlink -f $path) init=$(readlink -f $path/init) initrd=$(echo $initrd | sed 's|@efiSysMountPoint@||' | sed 's|/|\\|g') $(cat $path/kernel-params) > /dev/null 2>&1
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set -e
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fi
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if test $(readlink -f "$path") = "$default"; then
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if test -n "@runEfibootmgr@"; then
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set +e
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defaultbootnum=$(efibootmgr | grep "NixOS $generation Generation" | sed 's/Boot//' | sed 's/\*.*//')
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set -e
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fi
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if test -n "@installStartupNsh@"; then
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sed 's|.*@kernelFile@.efi|@kernelFile@.efi|' < $startup > "@efiSysMountPoint@/startup.nsh"
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cp $kernel "@efiSysMountPoint@/@kernelFile@.efi"
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fi
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fi
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}
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mkdir -p "@efiSysMountPoint@/efi/nixos/"
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# Remove all old boot manager entries
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if test -n "@runEfibootmgr@"; then
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set +e
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modprobe efivars > /dev/null 2>&1
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for bootnum in $(efibootmgr | grep "NixOS" | grep "Generation" | sed 's/Boot//' | sed 's/\*.*//'); do
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efibootmgr -B -b "$bootnum" > /dev/null 2>&1
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done
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set -e
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fi
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# Add all generations of the system profile to the system partition, 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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link=/nix/var/nix/profiles/system-$generation-link
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addEntry $link $generation
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done
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if test -n "@runEfibootmgr@"; then
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set +e
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efibootmgr -o $defaultbootnum > /dev/null 2>&1
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set -e
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fi
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if test -n "@efiShell@"; then
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mkdir -pv "@efiSysMountPoint@"/efi/boot
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cp "@efiShell@" "@efiSysMountPoint@"/efi/boot/boot"@targetArch@".efi
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fi
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# Remove obsolete files from the EFI system partition
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for fn in "@efiSysMountPoint@/efi/nixos/"*; do
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if ! test "${filesCopied[$fn]}" = 1; then
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rm -vf -- "$fn"
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fi
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done
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# Run any extra commands users may need
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if test -n "@runEfibootmgr@"; then
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set +e
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@postEfiBootMgrCommands@
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set -e
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fi
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