From e3d6f708c6f04335793db7579ba54995da32398d Mon Sep 17 00:00:00 2001
From: tmcgowan <mcgo0092@umn.edu>
Date: Tue, 21 Jul 2020 15:27:37 -0500
Subject: [PATCH] add help msg, bioconda test

---
 fastg2protlib/fastg2protlib.py | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/fastg2protlib/fastg2protlib.py b/fastg2protlib/fastg2protlib.py
index 3434172..6f849ff 100644
--- a/fastg2protlib/fastg2protlib.py
+++ b/fastg2protlib/fastg2protlib.py
@@ -305,7 +305,7 @@ def write_peptide_fasta(db, fasta_name="peptide.fasta"):
 
 
 def peptides_for_fastg(
-    fastg_filename,
+    fastg_filename=None,
     cleavage="trypsin",
     min_protein_length=166,
     min_peptide_length=10,
@@ -350,6 +350,10 @@ def peptides_for_fastg(
     """
     # endregion
 
+    if not fastg_filename:
+        print("A FASTG file path is mandatory.")
+        exit(0)
+
     logger.info(f"FASTG file: {fastg_filename}")
     logger.info(f"Protein len: {min_protein_length}")
     logger.info(f"Peptide len: {min_peptide_length}")