Merge pull request #6 from gigalixir/fix-handle-tool-versions-with-no-versions

fix: handle when tool-versions does not contain either version

Author: gigatim

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
 }
 

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