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From what I currently understand, lorri is a tool (sponsored by Target) that
uses nix and direnv to build and switch between environments quickly and
easily.

When you run `lorri init` inside of a directory, lorri creates a shell.nix and
an .envrc file. The .envrc file calls `eval "$(lorri direnv)"` and the shell.nix
calls `<nixpkgs>.mkShell`, which creates a shell environment exposing
dependencies on $PATH and environment variables. lorri uses direnv to ensure
that $PATH and the environment variables are available depending on your CWD.

lorri becomes especially powerful because of Emacs's `direnv-mode`, which
ensures that Emacs buffers can access anything exposed by direnv as well.

I still need to learn more about how lorri works and how it will affect my
workflow, but I'm enjoying what I've seen thus far, and I'm optimistic about the
road ahead.
This commit is contained in:
William Carroll 2020-02-06 21:39:23 +00:00
parent a91d00fd94
commit b47ca8b876
4 changed files with 29 additions and 7 deletions
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8
.envrc
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@ -1,7 +1 @@
export BRIEFCASE=~/briefcase
export DEPOT=~/depot
export NIXPKGS=$HOME/nixpkgs
export DESKTOP=zeno.lon.corp.google.com
export LAPTOP=seneca
export CLOUDTOP=wpcarro.c.googlers.com
NIX_PATH=nixpkgs=$NIXPKGS:depot=$DEPOT:briefcase=$BRIEFCASE
eval "$(lorri direnv)"

5
monzo_ynab/.envrc
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@ -1,5 +1,10 @@
# source_up traversing up directories until it finds the nearest .envrc file,
# which it uses to extend the environment in this .envrc.
#
# Since ../.envrc calls `eval "$(lorri direnv)"`, the buildInputs and variables
# definitions inside of the attribute set passed to pkgs.mkShell become
# available here as well.
source_up
export client_id="$(pass show finance/monzo/client-id)"
export client_secret="$(pass show finance/monzo/client-secret)"
eval "$(lorri direnv)"

9
monzo_ynab/shell.nix Normal file
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@ -0,0 +1,9 @@
{ pkgs ? import <nixpkgs> {}, ... }:
pkgs.mkShell {
buildInputs = [
pkgs.go
pkgs.goimports
pkgs.godef
];
}

14
shell.nix Normal file
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@ -0,0 +1,14 @@
{ pkgs ? import <nixpkgs> {}, ... }:
pkgs.mkShell rec {
buildInputs = [];
# TODO(wpcarro): How does pkgs.mkShell handle exported and non-exported
# variable definitions?
BRIEFCASE = builtins.toPath ~/briefcase;
DEPOT = builtins.toPath ~/depot;
NIXPKGS = builtins.toPath ~/nixpkgs;
NIX_PATH="nixpkgs=${NIXPKGS}:depot=${DEPOT}:briefcase=${BRIEFCASE}";
DESKTOP = "zeno.lon.corp.google.com";
LAPTOP = "seneca";
CLOUDTOP = "wpcarro.c.googlers.com";
}