From 975e8576ec8fcabfdfd5307c6c19a879fcf8795f Mon Sep 17 00:00:00 2001
From: "la.panon." <panno.devel@gmail.com>
Date: Thu, 3 Apr 2025 22:54:39 +0900
Subject: [PATCH] Make `loadConfig` available from NimScript (#24840)

fixes #24837

I really wanted to name the variable just `stream` and leave `defer:
...` and `result =...` out, but the compiler says the variable is
redefined, so this is the form.

(cherry picked from commit 2ed45eb848cbd4d9f88602adf9baf4c7b0d70961)
---
 lib/pure/parsecfg.nim | 15 +++++++++++----
 1 file changed, 11 insertions(+), 4 deletions(-)

diff --git a/lib/pure/parsecfg.nim b/lib/pure/parsecfg.nim
index 0744d94a69..99b1c9a41e 100644
--- a/lib/pure/parsecfg.nim
+++ b/lib/pure/parsecfg.nim
@@ -540,10 +540,17 @@ proc loadConfig*(stream: Stream, filename: string = "[stream]"): Config =
 
 proc loadConfig*(filename: string): Config =
   ## Loads the specified configuration file into a new Config instance.
-  let file = open(filename, fmRead)
-  let fileStream = newFileStream(file)
-  defer: fileStream.close()
-  result = fileStream.loadConfig(filename)
+  when nimvm:
+    # HACK: As a workaround,
+    # since open() using {.importc.} is not available on NimScript.
+    let stringStream = newStringStream(readFile(filename))
+    defer: stringStream.close()
+    result = stringStream.loadConfig(filename)
+  else:
+    let file = open(filename, fmRead)
+    let fileStream = newFileStream(file)
+    defer: fileStream.close()
+    result = fileStream.loadConfig(filename)
 
 proc replace(s: string): string =
   var d = ""