fix subprocess miss handling the pipe operator

install-mpsd-software-environment.py

@@ -253,7 +253,8 @@ def install_environment(
                 .replace("_mpsd_spack_ver_", f"_{mpsd_release}_")
             )
             subprocess.run(
-                ["bash", spack_setup_script, *install_flags, toolchain, f" | tee -a {install_log_file} 2>&1"],
+                f"bash {spack_setup_script} {' '.join(install_flags)} {toolchain} | tee -a {install_log_file} 2>&1",
+                shell=True,
             )
 
 

tests.py

@@ -170,3 +170,11 @@ def test_install_environment(tmp_path):
         lines = f.read()
         assert 'zlib' in lines
     
+
+def test_interface(tmp_path):
+    pass
+    # ensure that installing without toolchains only passes the available toolchains
+    # check that the script branch and hash are correct when running the script
+    # check that the help message is printed when no arguments are provided
+    # check that the help message is printed when -h is provided
+    
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