sourcegraph/shell.nix at main · Modestzero/sourcegraph · GitHub

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# Experimental support for developing in nix. Please reach out to @keegan or @noah if

# you encounter any issues.

# Things it does differently:

# - Runs postgres under ~/.sourcegraph with a unix socket. No need to manage a

# service. Must remember to run "pg_ctl stop" if you want to stop it.

# Status: everything works on linux & darwin.

{ pkgs

, buildFHSEnv

, mkShell

, hostPlatform

, lib

, writeShellScriptBin

let

# On darwin, we let bazelisk manage the bazel version since we actually need to run two

# different versions thanks to aspect. Additionally bazelisk allows us to do

# things like "bazel configure". So we just install a script called bazel

# which calls bazelisk.

# Additionally bazel seems to break when CC and CXX is set to a nix managed

# compiler on darwin. So the script unsets those.

bazel-wrapper = writeShellScriptBin "bazel" (if hostPlatform.isMacOS then ''

export CC=/usr/bin/clang

exec ${pkgs.bazelisk}/bin/bazelisk "$@"

'' else ''

unset TMPDIR TMP

exec ${pkgs.bazel_7}/bin/bazel "$@"

'');

bazel-watcher = writeShellScriptBin "ibazel" ''

${lib.optionalString hostPlatform.isMacOS "export CC=/usr/bin/clang"}

exec ${pkgs.bazel-watcher}/bin/ibazel \

${lib.optionalString hostPlatform.isLinux "-bazel_path=${bazel-fhs}/bin/bazel"} "$@"

'';

bazel-fhs = buildFHSEnv {

name = "bazel";

runScript = "bazel";

targetPkgs = pkgs: (with pkgs; [

bazel-wrapper

zlib.dev

]);

# unsharePid required to preserve bazel server between bazel invocations,

# the rest are disabled just in case

unsharePid = false;

unshareUser = false;

unshareIpc = false;

unshareNet = false;

unshareUts = false;

unshareCgroup = false;

};

# pkgs.universal-ctags installs the binary as "ctags", not "universal-ctags"

# like zoekt expects.

universal-ctags = pkgs.writeScriptBin "universal-ctags" ''

#!${pkgs.stdenv.shell}

exec ${pkgs.universal-ctags}/bin/ctags "$@"

'';

# We have scripts which use gsed on darwin since that is what homebrew calls

# the binary for GNU sed.

gsed = pkgs.writeShellScriptBin "gsed" ''exec ${pkgs.gnused}/bin/sed "$@"'';

mkShell.override { stdenv = if hostPlatform.isMacOS then pkgs.clang11Stdenv else pkgs.stdenv; } {

name = "sourcegraph-dev";

# The packages in the `buildInputs` list will be added to the PATH in our shell

nativeBuildInputs = with pkgs; [

bashInteractive

zip

# nix language server.

nil

# Our core DB.

postgresql_12

# Cache and some store data.

redis

# Used by symbols and zoekt-git-index to extract symbols from sourcecode.

universal-ctags

# Build our backend. Sometimes newer :^)

go_1_22

# Lots of our tooling and go tests rely on git et al.

comby

git

git-lfs

gsed

nssTools

parallel

# CI lint tools you need locally.

shfmt

shellcheck

# Web tools.

nodejs-20_x

nodejs-20_x.pkgs.pnpm

nodejs-20_x.pkgs.typescript

nodejs-20_x.pkgs.typescript-language-server

# Rust utils for syntax-highlighter service, currently not pinned to the same versions.

cargo

rustc

rustfmt

libiconv

clippy

bazel-buildtools

buf

] ++ lib.optional hostPlatform.isLinux (with pkgs; [

# bazel via nix is broken on MacOS for us. Lets just rely on bazelisk from brew.

# special sauce bazel stuff.

bazelisk # needed to please sg, but not used directly by us

bazel-fhs

bazel-watcher

]) ++ lib.optional hostPlatform.isMacOS [ bazel-wrapper ];

# Startup postgres, redis & set nixos specific stuff

shellHook = ''

set -h # command hashmap is not guaranteed to be enabled, but required by sg

. ./dev/nix/shell-hook.sh

'';

# Fix for using Delve https://github.com/sourcegraph/sourcegraph/pull/35885

hardeningDisable = [ "fortify" ];

# By explicitly setting this environment variable we avoid starting up

# universal-ctags via docker.

CTAGS_COMMAND = "${universal-ctags}/bin/universal-ctags";

RUST_SRC_PATH = "${pkgs.rust.packages.stable.rustPlatform.rustLibSrc}";

# Some of the bazel actions require some tools assumed to be in the PATH defined by the "strict action env" that we enable

# through --incompatible_strict_action_env. We can poke a custom PATH through with --action_env=PATH=$BAZEL_ACTION_PATH.

# See https://sourcegraph.com/github.com/bazelbuild/bazel@6.1.2/-/blob/src/main/java/com/google/devtools/build/lib/bazel/rules/BazelRuleClassProvider.java?L532-547

BAZEL_ACTION_PATH = with pkgs; lib.makeBinPath [ file hexdump bashInteractive stdenv.cc coreutils unzip zip curl gzip gnutar gnugrep gnused git patch openssh findutils perl python39 which postgresql_13 docker-credential-helpers ];

# bazel complains when the bazel version differs even by a patch version to whats defined in .bazelversion,

# so we tell it to h*ck off here.

# https://sourcegraph.com/github.com/bazelbuild/bazel@1a4da7f331c753c92e2c91efcad434dc29d10d43/-/blob/scripts/packages/bazel.sh?L23-28

USE_BAZEL_VERSION = if hostPlatform.isMacOS then "" else pkgs.bazel_7.version;

LIBTOOL = if hostPlatform.isMacOS then "/usr/bin/libtool" else "";

}

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