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#!/usr/bin/env bash
#
set -euxo pipefail
#
[[ -z "$1" ]] \
&& echo "usage: install.sh <file.nix>" \
&& echo "where <file.nix> is something from the 'profiles' directory" \
&& exit 1
#
mkdir -p ~/.config/nixpkgs
NIXDIR="$HOME/.config/nixpkgs"
HOMEFILE="$NIXDIR/home.nix"
NIXFILE="$(pwd)/$1"
#
# start from scratch
rm "$HOMEFILE"
ln -s "$NIXFILE" "$HOMEFILE"
rm "$NIXDIR/config.nix"
ln -s "$(pwd)/lib/config.nix" "$NIXDIR/config.nix"
#
# the notmuch config location is by default ~/.notmuch-config, but home-manager
# puts it at ~/.config/notmuch/notmuchrc (which makes sense) and then sets
# NOTMUCH_CONFIG. however, if a program for some reason doesn't read
# NOTMUCH_CONFIG (emacs), then it won't find the right config file, so I
# override with a symlink.
#
mkdir -p ~/.config/notmuch
[[ -e ~/.notmuch-config ]] || ln -s ~/.config/notmuch/notmuchrc ~/.notmuch-config
#
# symlinking must occur before initial generation. now we can install, and
# pin our own nixpkgs.
#
nix-channel --update
NIX_PATH=$HOME/.nix-defexpr/channels${NIX_PATH:+:}$NIX_PATH \
nix-shell . -A install
#nix-shell '<home-manager>' -A install
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