From bc3c1ef4823955ca14d0c787ed312ce623e09e0e Mon Sep 17 00:00:00 2001
From: Tim <tim@gigalixir.com>
Date: Thu, 29 Jan 2026 14:55:09 -0600
Subject: [PATCH] fix: handle when tool-versions does not contain either
 version

---
 lib/misc_funcs.sh   |  2 +-
 test/load_config.sh | 16 +++++++++++++++-
 2 files changed, 16 insertions(+), 2 deletions(-)

diff --git a/lib/misc_funcs.sh b/lib/misc_funcs.sh
index b0b921b..73a08bf 100644
--- a/lib/misc_funcs.sh
+++ b/lib/misc_funcs.sh
@@ -58,7 +58,7 @@ function extract_asdf_version() {
   local package=$1
 
   if [ -f $file ]; then
-    grep "^$package" $file | tail -n 1 | awk '{print $2}'
+    grep "^$package" $file | tail -n 1 | awk '{print $2}' || true
   fi
 }
 
diff --git a/test/load_config.sh b/test/load_config.sh
index 412cdb3..9605981 100755
--- a/test/load_config.sh
+++ b/test/load_config.sh
@@ -1,6 +1,6 @@
 #!/usr/bin/env bash
 
-set -e
+set -e -o pipefail
 
 SCRIPT_DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" &> /dev/null && pwd )"
 source $SCRIPT_DIR/.test_support.sh
@@ -111,6 +111,20 @@ erlang_version=26.0" > $build_path/elixir_buildpack.config
 
 
 
+  test "has config file with versions and asdf file with only unrelated packages"
+
+    echo "nodejs 22.1.0" > $build_path/.tool-versions
+    echo "elixir_version=1.16.2
+erlang_version=26.2.5" > $build_path/elixir_buildpack.config
+
+    load_config > /dev/null
+
+    [ "$erlang_version" == "26.2.5" ]
+    [ "$elixir_version" == "v1.16.2" ]
+    [ $failed == "false" ]
+
+
+
   test "fixes single integer erlang versions"
 
     echo "erlang_version=25" > $build_path/elixir_buildpack.config