Add sanity check CI (#17)

* Add sanity check CI

* Check for help mesage rather than no arguments

* Minor re-organization to prevent error code exit

.github/workflows/sanity.yml

@@ -0,0 +1,26 @@
+name: Sanity
+
+on:
+  push:
+    branches: ["main"]
+  pull_request:
+    branches: ["main"]
+
+jobs:
+  sanity:
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@v3
+
+      - name: Update pip
+        run: python3 -m pip install --upgrade pip
+
+      - name: Install
+        run: python3 -m pip install .
+
+      - name: Install in editable mode
+        run: python3 -m pip install -e .
+
+      - name: Check help message
+        run: python3 -m chatdbg --help

src/chatdbg/chatdbg.py

@@ -52,14 +52,14 @@ def main():
 
     opts, args = getopt.getopt(sys.argv[1:], "mhc:", ["help", "command="])
 
-    if not args:
-        print(_usage)
-        sys.exit(2)
-
     if any(opt in ["-h", "--help"] for opt, optarg in opts):
         print(_usage)
         sys.exit()
 
+    if not args:
+        print(_usage)
+        sys.exit(2)
+
     commands = [optarg for opt, optarg in opts if opt in ["-c", "--command"]]
 
     module_indicated = any(opt in ["-m"] for opt, optarg in opts)