103 lines
2.8 KiB
Bash
103 lines
2.8 KiB
Bash
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#!/usr/bin/env bash
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set -e
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root_disks() {
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diskutil list -plist /
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}
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apfs_volumes_for() {
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disk=$1
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diskutil apfs list -plist "$disk"
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}
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disk_identifier() {
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xpath "/plist/dict/key[text()='WholeDisks']/following-sibling::array[1]/string/text()" 2>/dev/null
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}
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volume_get() {
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key=$1 i=$2
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xpath "/plist/dict/array/dict/key[text()='Volumes']/following-sibling::array/dict[$i]/key[text()='$key']/following-sibling::string[1]/text()" 2> /dev/null
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}
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find_nix_volume() {
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disk=$1
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i=1
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volumes=$(apfs_volumes_for "$disk")
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while true; do
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name=$(echo "$volumes" | volume_get "Name" "$i")
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if [ -z "$name" ]; then
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break
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fi
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case "$name" in
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[Nn]ix*)
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echo "$name"
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break
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;;
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esac
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i=$((i+1))
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done
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}
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test_fstab() {
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grep -q "/nix" /etc/fstab 2>/dev/null
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}
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test_synthetic_conf() {
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grep -q "^nix" /etc/synthetic.conf 2>/dev/null
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}
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test_nix() {
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test -d "/nix"
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}
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main() {
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(
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echo ""
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echo " ------------------------------------------------------------------ "
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echo " | This installer will create a volume for the nix store and |"
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echo " | configure it to mount at /nix. Follow these steps to uninstall. |"
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echo " ------------------------------------------------------------------ "
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echo ""
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echo " 1. Remove the entry from fstab using 'sudo vifs'"
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echo " 2. Destroy the data volume using 'diskutil apfs deleteVolume'"
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echo " 3. Delete /etc/synthetic.conf"
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echo ""
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) >&2
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if [ -L "/nix" ]; then
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echo "error: /nix is a symlink, please remove it or edit synthetic.conf (requires reboot)" >&2
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echo " /nix -> $(readlink "/nix")" >&2
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exit 2
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fi
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if ! test_synthetic_conf; then
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echo "Configuring /etc/synthetic.conf..." >&2
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echo nix | sudo tee /etc/synthetic.conf
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/System/Library/Filesystems/apfs.fs/Contents/Resources/apfs.util -B
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fi
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if ! test_nix; then
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echo "Creating mountpoint for /nix..." >&2
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sudo mkdir /nix
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fi
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disk=$(root_disks | disk_identifier)
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volume=$(find_nix_volume "$disk")
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if [ -z "$volume" ]; then
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echo "Creating a Nix Store volume..." >&2
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sudo diskutil apfs addVolume "$disk" APFS 'Nix Store' -mountpoint /nix
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volume="Nix Store"
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else
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echo "Using existing '$volume' volume" >&2
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fi
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if ! test_fstab; then
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echo "Configuring /etc/fstab..." >&2
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label=$(echo "$volume" | sed 's/ /\\040/g')
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printf "\$a\nLABEL=%s /nix apfs rw\n.\nwq\n" "$label" | EDITOR=ed sudo vifs
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sudo defaults write /Library/Preferences/SystemConfiguration/autodiskmount AutomountDisksWithoutUserLogin -bool true
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fi
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}
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main "$@"
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