Add eslint message parsing + abs. path removal

README.md

@@ -9,6 +9,23 @@ added to "PATTERNS" to match more messages.
 
 To allow multiline patterns, the python module 'regex' is required.
 
+## OPTIONS
+
+```text
+positional arguments:
+  input                 Input file. Use '-' for stdin.
+  output                Output file. Use '-' for stdout.
+
+optional arguments:
+  -h, --help            show this help message and exit
+  -i INPUT_NAMED, --in INPUT_NAMED
+                        Input filename. Overrides positional input.
+  -o OUTPUT_NAMED, --out OUTPUT_NAMED
+                        Output filename. Overrides positional output.
+  --root ROOT_PATH      Root directory to remove from file paths.
+                        Defaults to working directory.
+```
+
 ## Examples
 
 Assumes that logToCs.py is available as .github/logToCs.py.

logToCs.py

@@ -310,19 +310,22 @@ def main():
     )
     parser.add_argument(
         "-i",
-        "--input-named",
-        help="Named input file. Overrides positional input.",
+        "--in",
+        dest="input_named",
+        help="Input filename. Overrides positional input.",
     )
     parser.add_argument(
         "-o",
-        "--output-named",
-        help="Named output file. Overrides positional output.",
+        "--out",
+        dest="output_named",
+        help="Output filename. Overrides positional output.",
     )
     parser.add_argument(
         "--root",
         metavar="ROOT_PATH",
-        help="Root directory to remove from file paths",
-        default=os.path.dirname(os.path.abspath(__file__)),
+        help="Root directory to remove from file paths."
+        "  Defaults to working directory.",
+        default=os.getcwd(),
     )
 
     args = parser.parse_args()