lix/scripts/install-nix-from-closure.sh
Ana Hobden 8ebdbeb257 Add fish suport to installer
Before this patch, installing Nix using the Fish shell did not
work because Fish wasn't configured to add Nix to the PATH. Some
options in #1512 offered workarounds, but they typically involve
extra plugins or packages.

This patch adds native, out-of-the-box support for the Fish shell.

Note that Fish supports a `conf.d` directory, which is intended
for exactly use cases like this: software projects distributing
shell snippets. This patch takes advantage of it. The installer
doesn't append any Nix loader behavior to any Fish config file.
Because of that, the uninstall process is smooth and a reinstall
obliterates the existing nix.fish files that we place instead of
bothering the user with a backup / manual removal.

Both single-user and multi-user cases are covered. It has been
tested on Ubuntu, and a Mac with MacPorts, homebrew, and the
Fish installer pkg.

Closes #1512

Co-authored-by: Graham Christensen <graham@grahamc.com>
2022-09-13 12:56:16 -04:00

279 lines
8.8 KiB
Bash

#!/bin/sh
set -e
umask 0022
dest="/nix"
self="$(dirname "$0")"
nix="@nix@"
cacert="@cacert@"
if ! [ -e "$self/.reginfo" ]; then
echo "$0: incomplete installer (.reginfo is missing)" >&2
fi
if [ -z "$USER" ] && ! USER=$(id -u -n); then
echo "$0: \$USER is not set" >&2
exit 1
fi
if [ -z "$HOME" ]; then
echo "$0: \$HOME is not set" >&2
exit 1
fi
# macOS support for 10.12.6 or higher
if [ "$(uname -s)" = "Darwin" ]; then
IFS='.' read -r macos_major macos_minor macos_patch << EOF
$(sw_vers -productVersion)
EOF
if [ "$macos_major" -lt 10 ] || { [ "$macos_major" -eq 10 ] && [ "$macos_minor" -lt 12 ]; } || { [ "$macos_minor" -eq 12 ] && [ "$macos_patch" -lt 6 ]; }; then
# patch may not be present; command substitution for simplicity
echo "$0: macOS $(sw_vers -productVersion) is not supported, upgrade to 10.12.6 or higher"
exit 1
fi
fi
# Determine if we could use the multi-user installer or not
if [ "$(uname -s)" = "Linux" ]; then
echo "Note: a multi-user installation is possible. See https://nixos.org/manual/nix/stable/installation/installing-binary.html#multi-user-installation" >&2
fi
case "$(uname -s)" in
"Darwin")
INSTALL_MODE=daemon;;
*)
INSTALL_MODE=no-daemon;;
esac
# space-separated string
ACTIONS=
# handle the command line flags
while [ $# -gt 0 ]; do
case $1 in
--daemon)
INSTALL_MODE=daemon
ACTIONS="${ACTIONS}install "
;;
--no-daemon)
if [ "$(uname -s)" = "Darwin" ]; then
printf '\e[1;31mError: --no-daemon installs are no-longer supported on Darwin/macOS!\e[0m\n' >&2
exit 1
fi
INSTALL_MODE=no-daemon
# intentional tail space
ACTIONS="${ACTIONS}install "
;;
# --uninstall)
# # intentional tail space
# ACTIONS="${ACTIONS}uninstall "
# ;;
--no-channel-add)
export NIX_INSTALLER_NO_CHANNEL_ADD=1;;
--daemon-user-count)
export NIX_USER_COUNT=$2
shift;;
--no-modify-profile)
NIX_INSTALLER_NO_MODIFY_PROFILE=1;;
--darwin-use-unencrypted-nix-store-volume)
{
echo "Warning: the flag --darwin-use-unencrypted-nix-store-volume"
echo " is no longer needed and will be removed in the future."
echo ""
} >&2;;
--nix-extra-conf-file)
# shellcheck disable=SC2155
export NIX_EXTRA_CONF="$(cat "$2")"
shift;;
*)
{
echo "Nix Installer [--daemon|--no-daemon] [--daemon-user-count INT] [--no-channel-add] [--no-modify-profile] [--nix-extra-conf-file FILE]"
echo "Choose installation method."
echo ""
echo " --daemon: Installs and configures a background daemon that manages the store,"
echo " providing multi-user support and better isolation for local builds."
echo " Both for security and reproducibility, this method is recommended if"
echo " supported on your platform."
echo " See https://nixos.org/manual/nix/stable/installation/installing-binary.html#multi-user-installation"
echo ""
echo " --no-daemon: Simple, single-user installation that does not require root and is"
echo " trivial to uninstall."
echo " (default)"
echo ""
echo " --no-channel-add: Don't add any channels. nixpkgs-unstable is installed by default."
echo ""
echo " --no-modify-profile: Don't modify the user profile to automatically load nix."
echo ""
echo " --daemon-user-count: Number of build users to create. Defaults to 32."
echo ""
echo " --nix-extra-conf-file: Path to nix.conf to prepend when installing /etc/nix/nix.conf"
echo ""
if [ -n "${INVOKED_FROM_INSTALL_IN:-}" ]; then
echo " --tarball-url-prefix URL: Base URL to download the Nix tarball from."
fi
} >&2
exit;;
esac
shift
done
if [ "$INSTALL_MODE" = "daemon" ]; then
printf '\e[1;31mSwitching to the Multi-user Installer\e[0m\n'
exec "$self/install-multi-user" $ACTIONS # let ACTIONS split
exit 0
fi
if [ "$(id -u)" -eq 0 ]; then
printf '\e[1;31mwarning: installing Nix as root is not supported by this script!\e[0m\n'
fi
echo "performing a single-user installation of Nix..." >&2
if ! [ -e "$dest" ]; then
cmd="mkdir -m 0755 $dest && chown $USER $dest"
echo "directory $dest does not exist; creating it by running '$cmd' using sudo" >&2
if ! sudo sh -c "$cmd"; then
echo "$0: please manually run '$cmd' as root to create $dest" >&2
exit 1
fi
fi
if ! [ -w "$dest" ]; then
echo "$0: directory $dest exists, but is not writable by you. This could indicate that another user has already performed a single-user installation of Nix on this system. If you wish to enable multi-user support see https://nixos.org/manual/nix/stable/installation/multi-user.html. If you wish to continue with a single-user install for $USER please run 'chown -R $USER $dest' as root." >&2
exit 1
fi
# The auto-chroot code in openFromNonUri() checks for the
# non-existence of /nix/var/nix, so we need to create it here.
mkdir -p "$dest/store" "$dest/var/nix"
printf "copying Nix to %s..." "${dest}/store" >&2
# Insert a newline if no progress is shown.
if [ ! -t 0 ]; then
echo ""
fi
for i in $(cd "$self/store" >/dev/null && echo ./*); do
if [ -t 0 ]; then
printf "." >&2
fi
i_tmp="$dest/store/$i.$$"
if [ -e "$i_tmp" ]; then
rm -rf "$i_tmp"
fi
if ! [ -e "$dest/store/$i" ]; then
cp -RPp "$self/store/$i" "$i_tmp"
chmod -R a-w "$i_tmp"
chmod +w "$i_tmp"
mv "$i_tmp" "$dest/store/$i"
chmod -w "$dest/store/$i"
fi
done
echo "" >&2
if ! "$nix/bin/nix-store" --load-db < "$self/.reginfo"; then
echo "$0: unable to register valid paths" >&2
exit 1
fi
# shellcheck source=./nix-profile.sh.in
. "$nix/etc/profile.d/nix.sh"
if ! "$nix/bin/nix-env" -i "$nix"; then
echo "$0: unable to install Nix into your default profile" >&2
exit 1
fi
# Install an SSL certificate bundle.
if [ -z "$NIX_SSL_CERT_FILE" ] || ! [ -f "$NIX_SSL_CERT_FILE" ]; then
"$nix/bin/nix-env" -i "$cacert"
export NIX_SSL_CERT_FILE="$HOME/.nix-profile/etc/ssl/certs/ca-bundle.crt"
fi
# Subscribe the user to the Nixpkgs channel and fetch it.
if [ -z "$NIX_INSTALLER_NO_CHANNEL_ADD" ]; then
if ! "$nix/bin/nix-channel" --list | grep -q "^nixpkgs "; then
"$nix/bin/nix-channel" --add https://nixos.org/channels/nixpkgs-unstable
fi
if [ -z "$_NIX_INSTALLER_TEST" ]; then
if ! "$nix/bin/nix-channel" --update nixpkgs; then
echo "Fetching the nixpkgs channel failed. (Are you offline?)"
echo "To try again later, run \"nix-channel --update nixpkgs\"."
fi
fi
fi
added=
p=
p_sh=$HOME/.nix-profile/etc/profile.d/nix.sh
p_fish=$HOME/.nix-profile/etc/profile.d/nix.fish
if [ -z "$NIX_INSTALLER_NO_MODIFY_PROFILE" ]; then
# Make the shell source nix.sh during login.
for i in .bash_profile .bash_login .profile; do
fn="$HOME/$i"
if [ -w "$fn" ]; then
if ! grep -q "$p_sh" "$fn"; then
echo "modifying $fn..." >&2
printf '\nif [ -e %s ]; then . %s; fi # added by Nix installer\n' "$p_sh" "$p_sh" >> "$fn"
fi
added=1
p=${p_sh}
break
fi
done
for i in .zshenv .zshrc; do
fn="$HOME/$i"
if [ -w "$fn" ]; then
if ! grep -q "$p_sh" "$fn"; then
echo "modifying $fn..." >&2
printf '\nif [ -e %s ]; then . %s; fi # added by Nix installer\n' "$p_sh" "$p_sh" >> "$fn"
fi
added=1
p=${p_sh}
break
fi
done
if [ -d "$HOME/.config/fish" ]; then
fishdir=$HOME/.config/fish/conf.d
if [ ! -d "$fishdir" ]; then
mkdir -p "$fishdir"
fi
fn="$fishdir/nix.fish"
echo "placing $fn..." >&2
printf '\nif test -e %s; . %s; end # added by Nix installer\n' "$p_fish" "$p_fish" > "$fn"
added=1
p=${p_fish}
fi
else
p=${p_sh}
fi
if [ -z "$added" ]; then
cat >&2 <<EOF
Installation finished! To ensure that the necessary environment
variables are set, please add the line
. $p
to your shell profile (e.g. ~/.profile).
EOF
else
cat >&2 <<EOF
Installation finished! To ensure that the necessary environment
variables are set, either log in again, or type
. $p
in your shell.
EOF
fi