From 97b0114ab84144e3574c74c7fb0e0e38681f3b6a Mon Sep 17 00:00:00 2001
From: Robert Hensing <robert@roberthensing.nl>
Date: Tue, 23 Jul 2024 16:54:04 +0200
Subject: [PATCH] renderMarkdownToTerminal: Add _NIX_TEST_RAW_MARKDOWN env var

For testing only.
---
 src/libcmd/markdown.cc | 25 +++++++++++++++++++------
 1 file changed, 19 insertions(+), 6 deletions(-)

diff --git a/src/libcmd/markdown.cc b/src/libcmd/markdown.cc
index 882f95faa..6a0d05d9f 100644
--- a/src/libcmd/markdown.cc
+++ b/src/libcmd/markdown.cc
@@ -1,5 +1,6 @@
 #include "markdown.hh"
-#include "util.hh"
+#include "environment-variables.hh"
+#include "error.hh"
 #include "finally.hh"
 #include "terminal.hh"
 
@@ -10,9 +11,9 @@
 
 namespace nix {
 
-std::string renderMarkdownToTerminal(std::string_view markdown)
-{
 #if HAVE_LOWDOWN
+static std::string doRenderMarkdownToTerminal(std::string_view markdown)
+{
     int windowWidth = getWindowSize().second;
 
     struct lowdown_opts opts
@@ -52,9 +53,21 @@ std::string renderMarkdownToTerminal(std::string_view markdown)
         throw Error("allocation error while rendering Markdown");
 
     return filterANSIEscapes(std::string(buf->data, buf->size), !isTTY());
-#else
-    return std::string(markdown);
-#endif
 }
 
+std::string renderMarkdownToTerminal(std::string_view markdown)
+{
+    if (auto e = getEnv("_NIX_TEST_RAW_MARKDOWN"); e && *e == "1")
+        return std::string(markdown);
+    else
+        return doRenderMarkdownToTerminal(markdown);
 }
+
+#else
+std::string renderMarkdownToTerminal(std::string_view markdown)
+{
+    return std::string(markdown);
+}
+#endif
+
+} // namespace nix