From 2e70c6bf1f0d7a16c3d70512de1650bb010d13b6 Mon Sep 17 00:00:00 2001
From: Paul Buetow <paul@buetow.org>
Date: Wed, 9 Jul 2025 00:13:52 +0300
Subject: fix: unbound variable in html::source_highlight

---
 README.md          | 10 ++++++++++
 lib/html.source.sh |  2 +-
 2 files changed, 11 insertions(+), 1 deletion(-)

diff --git a/README.md b/README.md
index c7b237a..f11957a 100644
--- a/README.md
+++ b/README.md
@@ -122,6 +122,16 @@ The HTML output supports source code highlighting. The requirement is to have th
  ...
 ```
 
+Alternatively, you can set the language to `AUTO` to enable automatic language detection:
+
+```
+ ```AUTO
+ if [ -n "$foo" ]; then
+   echo "$foo"
+ fi
+ ...
+```
+
 Please run `source-highlight --lang-list` for a list of all supported languages.
 
 For available styles, have a look here: [GNU Source-highlight Style Examples](https://www.gnu.org/savannah-checkouts/gnu/src-highlite/style_examples.html)
diff --git a/lib/html.source.sh b/lib/html.source.sh
index 3e16264..8dab622 100644
--- a/lib/html.source.sh
+++ b/lib/html.source.sh
@@ -129,6 +129,7 @@ html::theme::webfonts () {
 html::source_highlight () {
     local -r bare_text="$1"; shift
     local -r language="$1"; shift
+    local tmp_file=''
 
     if [[ -z "$language" || -z "$SOURCE_HIGHLIGHT" ]]; then
         echo '<pre>'
@@ -141,7 +142,6 @@ html::source_highlight () {
         fi
 
         if [[ "$language" == "AUTO" ]]; then
-            local tmp_file
             tmp_file=$(mktemp)
             trap 'rm -f "$tmp_file"' RETURN
             printf %s "$bare_text" > "$tmp_file"
-- 
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