From fc96f6d0fdac6ac8e06af95c6ed416cb7c7d4e2e Mon Sep 17 00:00:00 2001
From: Doron Behar <doron.behar@gmail.com>
Date: Sun, 1 Oct 2023 13:41:42 +0300
Subject: [PATCH] buildNpmPackage: support makeWrapperArgs

---
 doc/languages-frameworks/javascript.section.md       |  1 +
 .../node/build-npm-package/hooks/npm-install-hook.sh | 12 +++++++++++-
 2 files changed, 12 insertions(+), 1 deletion(-)

diff --git a/doc/languages-frameworks/javascript.section.md b/doc/languages-frameworks/javascript.section.md
index 291629e3a711..f35fd83cc594 100644
--- a/doc/languages-frameworks/javascript.section.md
+++ b/doc/languages-frameworks/javascript.section.md
@@ -208,6 +208,7 @@ In the default `installPhase` set by `buildNpmPackage`, it uses `npm pack --json
 * `npmBuildFlags`: Flags to pass to `npm run ${npmBuildScript}`.
 * `npmPackFlags`: Flags to pass to `npm pack`.
 * `npmPruneFlags`: Flags to pass to `npm prune`. Defaults to the value of `npmInstallFlags`.
+* `makeWrapperArgs`: Flags to pass to `makeWrapper`, added to executable calling the generated `.js` with `node` as an interpreter. These scripts are defined in `package.json`.
 
 #### prefetch-npm-deps {#javascript-buildNpmPackage-prefetch-npm-deps}
 
diff --git a/pkgs/build-support/node/build-npm-package/hooks/npm-install-hook.sh b/pkgs/build-support/node/build-npm-package/hooks/npm-install-hook.sh
index 64ddcbd567fc..c5824a6b232b 100644
--- a/pkgs/build-support/node/build-npm-package/hooks/npm-install-hook.sh
+++ b/pkgs/build-support/node/build-npm-package/hooks/npm-install-hook.sh
@@ -16,9 +16,19 @@ npmInstallHook() {
         cp "${npmWorkspace-.}/$file" "$dest"
     done < <(@jq@ --raw-output '.[0].files | map(.path) | join("\n")' <<< "$(npm pack --json --dry-run ${npmWorkspace+--workspace=$npmWorkspace} $npmPackFlags "${npmPackFlagsArray[@]}" $npmFlags "${npmFlagsArray[@]}")")
 
+    # Based on code from Python's buildPythonPackage wrap.sh script, for
+    # supporting both the case when makeWrapperArgs is an array and a
+    # IFS-separated string.
+    #
+    # TODO: remove the string branch when __structuredAttrs are used.
+    if [[ "${makeWrapperArgs+defined}" == "defined" && "$(declare -p makeWrapperArgs)" =~ ^'declare -a makeWrapperArgs=' ]]; then
+        local -a user_args=("${makeWrapperArgs[@]}")
+    else
+        local -a user_args="(${makeWrapperArgs:-})"
+    fi
     while IFS=" " read -ra bin; do
         mkdir -p "$out/bin"
-        makeWrapper @hostNode@ "$out/bin/${bin[0]}" --add-flags "$packageOut/${bin[1]}"
+        makeWrapper @hostNode@ "$out/bin/${bin[0]}" --add-flags "$packageOut/${bin[1]}" "${user_args[@]}"
     done < <(@jq@ --raw-output '(.bin | type) as $typ | if $typ == "string" then
         .name + " " + .bin
         elif $typ == "object" then .bin | to_entries | map(.key + " " + .value) | join("\n")