From 340b5a1676062aa9bc7f17a2e078eaba96821bf3 Mon Sep 17 00:00:00 2001
From: Jake Leahy <jake@leahy.dev>
Date: Fri, 25 Feb 2022 07:16:46 +1100
Subject: [PATCH] Document links repect --out in .idx file  (#19543)

* Link in .idx file now respects --out:file switch

* Use clearer chained calls

Co-authored-by: Clay Sweetser <Varriount@users.noreply.github.com>
---
 compiler/docgen.nim | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/compiler/docgen.nim b/compiler/docgen.nim
index 3e61032d85..aad3b94094 100644
--- a/compiler/docgen.nim
+++ b/compiler/docgen.nim
@@ -1499,7 +1499,10 @@ proc genOutFile(d: PDoc, groupedToc = false): string =
   # Extract the title. Non API modules generate an entry in the index table.
   if d.meta[metaTitle].len != 0:
     title = d.meta[metaTitle]
-    let external = presentationPath(d.conf, AbsoluteFile d.filename).changeFileExt(HtmlExt).string.nativeToUnixPath
+    let external = AbsoluteFile(d.destFile)
+      .relativeTo(d.conf.outDir, '/')
+      .changeFileExt(HtmlExt)
+      .string
     setIndexTerm(d[], external, "", title)
   else:
     # Modules get an automatic title for the HTML, but no entry in the index.