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shell.nix
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shell.nix
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# Builds a sandbox for Emacs (and optionally, Doom) with a particular version of
# Emacs. Use this as a basis for module shell.nix's.
#
# Usage examples:
#
# To create a doom environment with the test config:
#
# nix-shell
#
# With your own DOOMDIR:
#
# nix-shell --argstr doomdir ~/.config/other-doom-config
#
# With a specific version of Emacs
#
# nix-shell --argstr emacs 26.3 # 26.3
# nix-shell --argstr emacs 27.1 # 27.1
# nix-shell --argstr emacs 27.2 # 27.2
# nix-shell --argstr emacs 28.1 # 28.1
# nix-shell --argstr emacs 28.2 # 28.2
# nix-shell --argstr emacs 29.1 # 29.1
# nix-shell --argstr emacs head # 30.0.50
# nix-shell --argstr emacs ci-26.3 # 26.3 (barebones; no GUI)
# nix-shell --argstr emacs ci-27.1 # 27.1 (barebones; no GUI)
# nix-shell --argstr emacs ci-27.2 # 27.2 (barebones; no GUI)
# nix-shell --argstr emacs ci-28.1 # 28.1 (barebones; no GUI)
# nix-shell --argstr emacs ci-28.2 # 28.2 (barebones; no GUI)
# nix-shell --argstr emacs ci-29.1 # 29.1 (barebones; no GUI)
# nix-shell --argstr emacs ci-HEAD # 30.0.50 (barebones; no GUI)
{ pkgs ? import (fetchTarball "https://github.com/NixOS/nixpkgs/archive/22.05.tar.gz")
{
overlays = [
# emacs-overlay: provides EmacsGit, EmacsNativeComp, and EmacsPgtkNativeComp
(import (fetchTarball "https://github.com/nix-community/emacs-overlay/archive/88e410d7f1ddef554b40f66755626e5c883487d9.tar.gz"))
# nix-emacs-ci: provides CI versions of Emacs 26.3, 27.1, 27.2, 28.1, 28.2, and snapshot
(_: _: (import (fetchTarball "https://github.com/purcell/nix-emacs-ci/archive/master.tar.gz")))
# emacs{26,27-{1,2},28-1}
(_: _: {
emacs26 = (import (fetchTarball "https://github.com/NixOS/nixpkgs/archive/11264a390b197b80edeffac6f20e582f3ea318bd.tar.gz") {}).emacs26;
emacs27-1 = (import (fetchTarball "https://github.com/NixOS/nixpkgs/archive/11264a390b197b80edeffac6f20e582f3ea318bd.tar.gz") {}).emacs;
emacs27-2 = (import (fetchTarball "https://github.com/NixOS/nixpkgs/archive/4c87cb87a2db6b9eb43541c1cf83f2a2f725fa25.tar.gz") {}).emacs;
emacs28-1 = (import (fetchTarball "https://github.com/NixOS/nixpkgs/archive/54e795706d9fa90004ed1274af639a717f04a2aa.tar.gz") {}).emacs;
emacs29-1 = (import (fetchTarball "https://github.com/NixOS/nixpkgs/archive/c434383f2a4866a7c674019b4cdcbfc55db3c4ab.tar.gz") {}).emacs29;
})
];
}
, emacs ? "29.1"
, emacsdir ? "$(pwd)"
, doomdir ? ""
, doomlocaldir ? "$EMACSDIR/.local" }:
let emacsPkg = (if emacs == "26.3" then pkgs.emacs26
else if emacs == "27.1" then pkgs.emacs27-1
else if emacs == "27.2" then pkgs.emacs27-2
else if emacs == "28.1" then pkgs.emacs28-1
else if emacs == "28.2" then pkgs.emacs
else if emacs == "29.1" then pkgs.emacs29-1
else if emacs == "head" then pkgs.emacsGit
else if emacs == "ci-26.3" then pkgs.emacs-26-3
else if emacs == "ci-27.1" then pkgs.emacs-27-1
else if emacs == "ci-27.2" then pkgs.emacs-27-2
else if emacs == "ci-28.1" then pkgs.emacs-28-1
else if emacs == "ci-28.2" then pkgs.emacs-28-2
else if emacs == "ci-29.1" then pkgs.emacs-29-1
else if emacs == "ci-head" then pkgs.emacs-snapshot
else pkgs.emacs);
in pkgs.stdenv.mkDerivation {
name = "doom-emacs";
buildInputs = [
emacsPkg
pkgs.git
(pkgs.ripgrep.override {withPCRE2 = true;})
];
shellHook = ''
export EMACS="${emacsPkg}/bin/emacs"
export EMACSVERSION="$($EMACS --no-site-file --batch --eval '(princ emacs-version)')"
if [[ -n "${emacsdir}" ]]; then
export EMACSDIR="$(readlink -f "${emacsdir}")/"
fi
if [[ -n "${doomdir}" ]]; then
export DOOMDIR="$(readlink -f "${doomdir}")/"
fi
if [[ -n "${doomlocaldir}" ]]; then
export DOOMLOCALDIR="$(readlink -f "${doomlocaldir}").$EMACSVERSION/"
fi
export DOOMNOCOMPILE=1
export PATH="$EMACSDIR/bin:$PATH"
echo "Running Emacs $EMACSVERSION (emacs=${emacs})"
echo "EMACSDIR=$EMACSDIR"
echo "DOOMDIR=$DOOMDIR"
echo "DOOMLOCALDIR=$DOOMLOCALDIR"
# Copy your existing repos over to optimize on install times (but not the
# builds, because that may contain stale bytecode).
mkdir -p "$DOOMLOCALDIR/straight"
pushd "$DOOMLOCALDIR/straight" >/dev/null
if [[ -d "$EMACSDIR/.local/straight/repos" && ! -d ./repos ]]; then
echo "Copying '$EMACSDIR/.local/straight/repos' to './$(basename $DOOMLOCALDIR)/straight/repos' to save time"
cp -r "$EMACSDIR/.local/straight/repos" ./repos
fi
popd >/dev/null
echo "Ready! Remember to 'doom sync'!"
'';
}