erlang-ls: add updateScript

To ensure dependencies are also updated

pkgs/development/beam-modules/erlang-ls/default.nix

@@ -1,10 +1,11 @@
-{ fetchFromGitHub, fetchHex, rebar3Relx, buildRebar3, rebar3-proper, stdenv, lib }:
+{ fetchFromGitHub, fetchgit, fetchHex, rebar3Relx, buildRebar3, rebar3-proper
+, stdenv, writeScript, lib }:
 let
   version = "0.18.0";
   owner = "erlang-ls";
   repo = "erlang_ls";
   deps = import ./rebar-deps.nix {
-    inherit fetchHex fetchFromGitHub;
+    inherit fetchHex fetchFromGitHub fetchgit;
     builder = buildRebar3;
     overrides = (self: super: {
       proper = super.proper.overrideAttrs (_: {
@@ -45,4 +46,22 @@ rebar3Relx {
     platforms = platforms.unix;
     license = licenses.asl20;
   };
+  passthru.updateScript = writeScript "update.sh" ''
+    #!/usr/bin/env nix-shell
+    #! nix-shell -i bash -p common-updater-scripts coreutils git gnused gnutar gzip "rebar3WithPlugins { globalPlugins = [ beamPackages.rebar3-nix ]; }"
+
+    set -ox errexit
+    latest=$(list-git-tags https://github.com/${owner}/${repo}.git | sed -n '/[\d\.]\+/p' | sort -V | tail -1)
+    if [[ "$latest" != "${version}" ]]; then
+      nixpkgs="$(git rev-parse --show-toplevel)"
+      nix_path="$nixpkgs/pkgs/development/beam-modules/erlang-ls"
+      update-source-version erlang-ls "$latest" --version-key=version --print-changes --file="$nix_path/default.nix"
+      tmpdir=$(mktemp -d)
+      cp -R $(nix-build $nixpkgs --no-out-link -A erlang-ls.src)/* "$tmpdir"
+      DEBUG=1
+      (cd "$tmpdir" && HOME=. rebar3 as test nix lock -o "$nix_path/rebar-deps.nix")
+    else
+      echo "erlang-ls is already up-to-date"
+    fi
+  '';
 }

pkgs/development/beam-modules/erlang-ls/rebar-deps.nix

@@ -1,6 +1,6 @@
 # Generated by rebar3_nix
 let fetchOnly = { src, ... }: src;
-in { builder ? fetchOnly, fetchHex, fetchFromGitHub, overrides ? (x: y: { }) }:
+in { builder ? fetchOnly, fetchHex, fetchgit, fetchFromGitHub, overrides ? (x: y: { }) }:
 let
   self = packages // (overrides self packages);
   packages = with self; {