elixir-ls: explicitly load elixir stdlib path

{

  lib,

  elixir,

  fetchpatch,

  fetchFromGitHub,

  fetchMixDeps,

  makeWrapper,

  mixRelease,

  nix-update-script,

}:

# Based on the work of Hauleth

# None of this would have happened without him

let

mixRelease rec {

  pname = "elixir-ls";

  version = "0.28.1";

  src = fetchFromGitHub {

    owner = "elixir-lsp";

    repo = "elixir-ls";

    rev = "v${version}";

    hash = "sha256-r4P+3MPniDNdF3SG2jfBbzHsoxn826eYd2tsv6bJBoI=";

  };

in

mixRelease {

  inherit

    pname

    version

    src

    elixir

    ;

  inherit elixir;

  stripDebug = true;

    hash = "sha256-8zs+99jwf+YX5SwD65FCPmfrYhTCx4AQGCGsDeCKxKc=";

  };

  # elixir-ls is an umbrella app

  # override configurePhase to not skip umbrella children

  configurePhase = ''

    runHook preConfigure

    mix deps.compile --no-deps-check

    runHook postConfigure

  '';

  patches = [

    # fix elixir deterministic support https://github.com/elixir-lsp/elixir-ls/pull/1216

    # remove > 0.28.1

    (fetchpatch {

      url = "https://github.com/elixir-lsp/elixir-ls/pull/1216.patch";

      hash = "sha256-J1Q7XQXWYuCMq48e09deQU71DOElZ2zMTzrceZMky+0=";

    })

    # patch wrapper script to remove elixir detection and inject necessary paths

    ./launch.sh.patch

  ];

  nativeBuildInputs = [

    makeWrapper

  ];

  # elixir-ls require a special step for release

  # compile and release need to be performed together because

  # of the no-deps-check requirement

  buildPhase = ''

    runHook preBuild

    mix do compile --no-deps-check, elixir_ls.release${lib.optionalString (lib.versionAtLeast elixir.version "1.16.0") "2"}

    runHook postBuild

  '';

  installPhase = ''

    runHook preInstall

    mkdir -p $out/bin

    cp -Rv release $out/lib

    # Prepare the wrapper script

    substitute release/language_server.sh $out/bin/elixir-ls \

      --replace 'exec "''${dir}/launch.sh"' "exec $out/lib/launch.sh"

    chmod +x $out/bin/elixir-ls

    substitute release/debug_adapter.sh $out/bin/elixir-debug-adapter \

      --replace 'exec "''${dir}/launch.sh"' "exec $out/lib/launch.sh"

    chmod +x $out/bin/elixir-debug-adapter

    # prepare the launchers

    substituteInPlace $out/lib/launch.sh \

      --replace "ERL_LIBS=\"\$SCRIPTPATH:\$ERL_LIBS\"" \

                "ERL_LIBS=$out/lib:\$ERL_LIBS" \

      --replace "exec elixir" "exec ${elixir}/bin/elixir" \

      --replace 'echo "" | elixir' "echo \"\" | ${elixir}/bin/elixir"

    substituteInPlace $out/lib/exec.zsh \

      --replace "exec elixir" "exec ${elixir}/bin/elixir"

    cp -Rv release $out/libexec

    substituteAllInPlace $out/libexec/launch.sh

    makeWrapper $out/libexec/language_server.sh $out/bin/elixir-ls \

      --set ELS_INSTALL_PREFIX "$out/libexec"

    makeWrapper $out/libexec/debug_adapter.sh $out/bin/elixir-debug-adapter \

      --set ELS_INSTALL_PREFIX "$out/libexec"

    runHook postInstall

  '';

diff --git i/scripts/launch.sh w/scripts/launch.sh

index 21afbb1e..975cbdf0 100755

--- i/scripts/launch.sh

+++ w/scripts/launch.sh

@@ -1,125 +1,4 @@

-#!/bin/sh

-# Actual launcher. This does the hard work of figuring out the best way

-# to launch the language server or the debug adapter.

-

-# Running this script is a one-time action per project launch, so we opt for

-# code simplicity instead of performance. Hence some potentially redundant

-# moves here.

-

-

-did_relaunch=$1

-

-# Get the user's preferred shell

-preferred_shell=$(basename "$SHELL")

-

-# Get current dirname

-dirname=$(dirname "$0")

-

-case "${did_relaunch}" in

-  "")

-    if [ "$preferred_shell" = "bash" ]; then

-      >&2 echo "Preferred shell is bash, relaunching"

-      exec "$(which bash)" "$0" relaunch

-    elif [ "$preferred_shell" = "zsh" ]; then

-      >&2 echo "Preferred shell is zsh, relaunching"

-      exec "$(which zsh)" "$0" relaunch

-    elif [ "$preferred_shell" = "fish" ]; then

-      >&2 echo "Preferred shell is fish, launching launch.fish"

-      exec "$(which fish)" "$dirname/launch.fish"

-    else

-      >&2 echo "Preferred shell $preferred_shell is not supported, continuing in POSIX shell"

-    fi

-    ;;

-  *)

-    # We have an arg2, so we got relaunched

-    ;;

-esac

-

-# First order of business, see whether we can setup asdf

-echo "Looking for asdf install" >&2

-

-readlink_f () {

-  cd "$(dirname "$1")" > /dev/null || exit 1

-  filename="$(basename "$1")"

-  if [ -h "$filename" ]; then

-    readlink_f "$(readlink "$filename")"

-  else

-    echo "$(pwd -P)/$filename"

-  fi

-}

-

-export_stdlib_path () {

-  which_elixir_expr=$1

-  stdlib_path=$(eval "$which_elixir_expr")

-  stdlib_real_path=$(readlink_f "$stdlib_path")

-  ELX_STDLIB_PATH=$(echo "$stdlib_real_path" | sed "s/\(.*\)\/bin\/elixir/\1/")

-  export ELX_STDLIB_PATH

-}

-

-# Check if we have the asdf binary for version >= 0.16.0

-if command -v asdf >/dev/null 2>&1; then

-    asdf_version=$(asdf --version 2>/dev/null)

-    version=$(echo "$asdf_version" | grep -Eo '[0-9]+\.[0-9]+\.[0-9]+')

-    major=$(echo "$version" | cut -d. -f1)

-    minor=$(echo "$version" | cut -d. -f2)

-    # If the version is less than 0.16.0 (i.e. major = 0 and minor < 16), use legacy method.

-    if [ "$major" -eq 0 ] && [ "$minor" -lt 16 ]; then

-        ASDF_DIR=${ASDF_DIR:-"${HOME}/.asdf"}

-        ASDF_SH="${ASDF_DIR}/asdf.sh"

-        if test -f "$ASDF_SH"; then

-            >&2 echo "Legacy pre v0.16.0 asdf install found at $ASDF_SH, sourcing"

-            # Source the old asdf.sh script for versions <= 0.15.0

-            . "$ASDF_SH"

-        else

-            >&2 echo "Legacy asdf not found at $ASDF_SH"

-        fi

-    else

-        >&2 echo "asdf executable found at $(command -v asdf). Using ASDF_DIR=${ASDF_DIR}, ASDF_DATA_DIR=${ASDF_DATA_DIR}."

-    fi

-    export_stdlib_path "asdf which elixir"

-else

-    # Fallback to old method for version <= 0.15.x

-    ASDF_DIR=${ASDF_DIR:-"${HOME}/.asdf"}

-    ASDF_SH="${ASDF_DIR}/asdf.sh"

-    if test -f "$ASDF_SH"; then

-        >&2 echo "Legacy pre v0.16.0 asdf install found at $ASDF_SH, sourcing"

-        # Source the old asdf.sh script for versions <= 0.15.0

-        . "$ASDF_SH"

-        export_stdlib_path "asdf which elixir"

-    else

-        >&2 echo "asdf not found"

-        >&2 echo "Looking for mise executable"

-

-        # Look for mise executable

-        if command -v mise >/dev/null 2>&1; then

-            >&2 echo "mise executable found at $(command -v mise), activating"

-            eval "$($(command -v mise) env -s "$preferred_shell")"

-            export_stdlib_path "mise which elixir"

-        else

-            >&2 echo "mise not found"

-            >&2 echo "Looking for rtx executable"

-

-            # Look for rtx executable

-            if command -v rtx >/dev/null 2>&1; then

-                >&2 echo "rtx executable found at $(command -v rtx), activating"

-                eval "$($(command -v rtx) env -s "$preferred_shell")"

-                export_stdlib_path "rtx which elixir"

-            else

-                >&2 echo "rtx not found"

-                >&2 echo "Looking for vfox executable"

-

-                # Look for vfox executable

-                if command -v vfox >/dev/null 2>&1; then

-                    >&2 echo "vfox executable found at $(command -v vfox), activating"

-                    eval "$($(command -v vfox) activate "$preferred_shell")"

-                else

-                    >&2 echo "vfox not found"

-                    export_stdlib_path "which elixir"

-                fi

-            fi

-        fi

-    fi

-fi

+#!/usr/bin/env bash

 # In case that people want to tweak the path, which Elixir to use, or

 # whatever prior to launching the language server or the debug adapter, we

@@ -138,29 +17,18 @@ fi

 # script so we can correctly configure the Erlang library path to

 # include the local .ez files, and then do what we were asked to do.

-if [ -z "${ELS_INSTALL_PREFIX}" ]; then

-  SCRIPT=$(readlink_f "$0")

-  SCRIPTPATH=$(dirname "$SCRIPT")

-else

-  SCRIPTPATH=${ELS_INSTALL_PREFIX}

-fi

+SCRIPT=$(readlink -f "$0")

+SCRIPTPATH=$(dirname "$SCRIPT")/../libexec

 export MIX_ENV=prod

 # Mix.install prints to stdout and reads from stdin

 # we need to make sure it doesn't interfere with LSP/DAP

-echo "" | elixir "$SCRIPTPATH/quiet_install.exs" >/dev/null || exit 1

+echo "" | @elixir@/bin/elixir "$SCRIPTPATH/quiet_install.exs" >/dev/null || exit 1

 default_erl_opts="-kernel standard_io_encoding latin1 +sbwt none +sbwtdcpu none +sbwtdio none"

-if [ "$preferred_shell" = "bash" ]; then

-  source "$dirname/exec.bash"

-elif [ "$preferred_shell" = "zsh" ]; then

-  source "$dirname/exec.zsh"

-else

-  if [ -z "$ELS_ELIXIR_OPTS" ]

-  then

-    # in posix shell does not support arrays

-    >&2 echo "ELS_ELIXIR_OPTS is not supported in current shell"

-  fi

-  exec elixir --erl "$default_erl_opts $ELS_ERL_OPTS" "$SCRIPTPATH/launch.exs"

-fi

+# ensure elixir stdlib can be found

+ELX_STDLIB_PATH=${ELX_STDLIB_PATH:-@elixir@/lib/elixir}

+export ELX_STDLIB_PATH

+

+source "$SCRIPTPATH/exec.bash"