From 4feda666083dc87b0e91493d208e099b4f8b6ad3 Mon Sep 17 00:00:00 2001
From: Micah Jerome Ellison <micah.jerome.ellison@gmail.com>
Date: Sat, 13 Jun 2020 14:21:49 -0700
Subject: [PATCH] Add diagnostic argument #727

---
 features/core.feature |  5 +++++
 jrnl/cli.py           | 17 +++++++++++++++++
 2 files changed, 22 insertions(+)

diff --git a/features/core.feature b/features/core.feature
index f9b335e6e..5bec4e956 100644
--- a/features/core.feature
+++ b/features/core.feature
@@ -130,3 +130,8 @@ Feature: Basic reading and writing to a journal
         and we change directory to "features"
         and we run "jrnl -n 1"
         Then the output should contain "hello world"
+
+    Scenario: --diagnostic runs without exceptions
+        When we run "jrnl --diagnostic"
+        Then the output should contain "jrnl"
+        And the output should contain "Python"
diff --git a/jrnl/cli.py b/jrnl/cli.py
index f6bb3b89d..8e5833910 100644
--- a/jrnl/cli.py
+++ b/jrnl/cli.py
@@ -21,6 +21,7 @@
 
 import argparse
 import logging
+import platform
 import re
 import sys
 
@@ -43,6 +44,14 @@ def parse_args(args=None):
         action="store_true",
         help="prints version information and exits",
     )
+
+    parser.add_argument(
+        "--diagnostic",
+        dest="diagnostic",
+        action="store_true",
+        help="outputs diagnostic information and exits",
+    )
+
     parser.add_argument(
         "-ls", dest="ls", action="store_true", help="displays accessible journals"
     )
@@ -315,6 +324,14 @@ def run(manual_args=None):
         print(version_str)
         sys.exit(0)
 
+    if args.diagnostic:
+        print(
+            f"jrnl: {jrnl.__version__}\n"
+            f"Python: {sys.version}\n"
+            f"OS: {platform.system()} {platform.release()}"
+        )
+        sys.exit(0)
+
     try:
         config = install.load_or_install_jrnl()
     except UserAbort as err: