mirror of
https://github.com/nmasur/dotfiles
synced 2024-11-22 01:45:37 +00:00
fish config for loading nix in non-nixos
This commit is contained in:
Noah Masur
parent
41eff7f1d8
commit
1604e7ba47
137
fish.configlink/conf.d/nix-env.fish
Normal file
137
fish.configlink/conf.d/nix-env.fish
Normal file
@ -0,0 +1,137 @@
|
||||
# Setup Nix
|
||||
|
||||
# We need to distinguish between single-user and multi-user installs.
|
||||
# This is difficult because there's no official way to do this.
|
||||
# We could look for the presence of /nix/var/nix/daemon-socket/socket but this will fail if the
|
||||
# daemon hasn't started yet. /nix/var/nix/daemon-socket will exist if the daemon has ever run, but
|
||||
# I don't think there's any protection against accidentally running `nix-daemon` as a user.
|
||||
# We also can't just look for /nix/var/nix/profiles/default/etc/profile.d/nix-daemon.sh because
|
||||
# older single-user installs used the default profile instead of a per-user profile.
|
||||
# We can still check for it first, because all multi-user installs should have it, and so if it's
|
||||
# not present that's a pretty big indicator that this is a single-user install. If it does exist,
|
||||
# we still need to verify the install type. To that end we'll look for a root owner and sticky bit
|
||||
# on /nix/store. Multi-user installs set both, single-user installs don't. It's certainly possible
|
||||
# someone could do a single-user install as root and then manually set the sticky bit but that
|
||||
# would be extremely unusual.
|
||||
|
||||
set -l nix_profile_path /nix/var/nix/profiles/default/etc/profile.d/nix-daemon.sh
|
||||
set -l single_user_profile_path ~/.nix-profile/etc/profile.d/nix.sh
|
||||
if test -e $nix_profile_path
|
||||
# The path exists. Double-check that this is a multi-user install.
|
||||
# We can't just check for ~/.nix-profile/… because this may be a single-user install running as
|
||||
# the wrong user.
|
||||
|
||||
# stat is not portable. Splitting the output of ls -nd is reliable on most platforms.
|
||||
set -l owner (string split -n ' ' (command ls -nd /nix/store 2>/dev/null))[3]
|
||||
if not test -k /nix/store -a $owner -eq 0
|
||||
# /nix/store is either not owned by root or not sticky. Assume single-user.
|
||||
set nix_profile_path $single_user_profile_path
|
||||
end
|
||||
else
|
||||
# The path doesn't exist. Assume single-user
|
||||
set nix_profile_path $single_user_profile_path
|
||||
end
|
||||
|
||||
if test -e $nix_profile_path
|
||||
# Source the nix setup script
|
||||
# We're going to run the regular Nix profile under bash and then print out a few variables
|
||||
for line in (command env -u BASH_ENV bash -c '. "$0"; for name in PATH "${!NIX_@}"; do printf "%s=%s\0" "$name" "${!name}"; done' $nix_profile_path | string split0)
|
||||
set -xg (string split -m 1 = $line)
|
||||
end
|
||||
|
||||
# Insert Nix's fish share directories into fish's special variables.
|
||||
# nixpkgs-installed fish tries to set these up already if NIX_PROFILES is defined, which won't
|
||||
# be the case when sourcing $__fish_data_dir/share/config.fish normally, but might be for a
|
||||
# recursive invocation. To guard against that, we'll only insert paths that don't already exit.
|
||||
# Furthermore, for the vendor_conf.d sourcing, we'll use the pre-existing presence of a path in
|
||||
# $fish_function_path to determine whether we want to source the relevant vendor_conf.d folder.
|
||||
|
||||
# To start, let's locally define NIX_PROFILES if it doesn't already exist.
|
||||
set -al NIX_PROFILES
|
||||
if test (count $NIX_PROFILES) -eq 0
|
||||
set -a NIX_PROFILES $HOME/.nix-profile
|
||||
end
|
||||
# Replicate the logic from nixpkgs version of $__fish_data_dir/__fish_build_paths.fish.
|
||||
set -l __nix_profile_paths (string split ' ' -- $NIX_PROFILES)[-1..1]
|
||||
set -l __extra_completionsdir \
|
||||
$__nix_profile_paths/etc/fish/completions \
|
||||
$__nix_profile_paths/share/fish/vendor_completions.d
|
||||
set -l __extra_functionsdir \
|
||||
$__nix_profile_paths/etc/fish/functions \
|
||||
$__nix_profile_paths/share/fish/vendor_functions.d
|
||||
set -l __extra_confdir \
|
||||
$__nix_profile_paths/etc/fish/conf.d \
|
||||
$__nix_profile_paths/share/fish/vendor_conf.d
|
||||
### Configure fish_function_path ###
|
||||
# Remove any of our extra paths that may already exist.
|
||||
# Record the equivalent __extra_confdir path for any function path that exists.
|
||||
set -l existing_conf_paths
|
||||
for path in $__extra_functionsdir
|
||||
if set -l idx (contains --index -- $path $fish_function_path)
|
||||
set -e fish_function_path[$idx]
|
||||
set -a existing_conf_paths $__extra_confdir[(contains --index -- $path $__extra_functionsdir)]
|
||||
end
|
||||
end
|
||||
# Insert the paths before $__fish_data_dir.
|
||||
if set -l idx (contains --index -- $__fish_data_dir/functions $fish_function_path)
|
||||
# Fish has no way to simply insert into the middle of an array.
|
||||
set -l new_path $fish_function_path[1..$idx]
|
||||
set -e new_path[$idx]
|
||||
set -a new_path $__extra_functionsdir
|
||||
set fish_function_path $new_path $fish_function_path[$idx..-1]
|
||||
else
|
||||
set -a fish_function_path $__extra_functionsdir
|
||||
end
|
||||
|
||||
### Configure fish_complete_path ###
|
||||
# Remove any of our extra paths that may already exist.
|
||||
for path in $__extra_completionsdir
|
||||
if set -l idx (contains --index -- $path $fish_complete_path)
|
||||
set -e fish_complete_path[$idx]
|
||||
end
|
||||
end
|
||||
# Insert the paths before $__fish_data_dir.
|
||||
if set -l idx (contains --index -- $__fish_data_dir/completions $fish_complete_path)
|
||||
set -l new_path $fish_complete_path[1..$idx]
|
||||
set -e new_path[$idx]
|
||||
set -a new_path $__extra_completionsdir
|
||||
set fish_complete_path $new_path $fish_complete_path[$idx..-1]
|
||||
else
|
||||
set -a fish_complete_path $__extra_completionsdir
|
||||
end
|
||||
|
||||
### Source conf directories ###
|
||||
# The built-in directories were already sourced during shell initialization.
|
||||
# Any __extra_confdir that came from $__fish_data_dir/__fish_build_paths.fish was also sourced.
|
||||
# As explained above, we're using the presence of pre-existing paths in $fish_function_path as a
|
||||
# signal that the corresponding conf dir has also already been sourced.
|
||||
# In order to simulate this, we'll run through the same algorithm as found in
|
||||
# $__fish_data_dir/config.fish except we'll avoid sourcing the file if it comes from an
|
||||
# already-sourced location.
|
||||
# Caveats:
|
||||
# * Files will be sourced in a different order than we'd ideally do (because we're coming in
|
||||
# after the fact to source them).
|
||||
# * If there are existing extra conf paths, files in them may have been sourced that should have
|
||||
# been suppressed by paths we're inserting in front.
|
||||
# * Similarly any files in $__fish_data_dir/vendor_conf.d that should have been suppressed won't
|
||||
# have been.
|
||||
set -l sourcelist
|
||||
for file in $__fish_config_dir/conf.d/*.fish $__fish_sysconf_dir/conf.d/*.fish
|
||||
# We know these paths were sourced already. Just record them.
|
||||
set -l basename (string replace -r '^.*/' '' -- $file)
|
||||
contains -- $basename $sourcelist
|
||||
or set -a sourcelist $basename
|
||||
end
|
||||
for root in $__extra_confdir
|
||||
for file in $root/*.fish
|
||||
set -l basename (string replace -r '^.*/' '' -- $file)
|
||||
contains -- $basename $sourcelist
|
||||
and continue
|
||||
set -a sourcelist $basename
|
||||
contains -- $root $existing_conf_paths
|
||||
and continue # this is a pre-existing path, it will have been sourced already
|
||||
[ -f $file -a -r $file ]
|
||||
and source $file
|
||||
end
|
||||
end
|
||||
end
|
||||
Loading…
Reference in New Issue
Block a user