change underscores to dash and add to readme

Author: kbrewersq

README.md

@@ -97,16 +97,23 @@ After adding a hook to your pre-commit config, it's not a bad idea to run `pre-c
 
     This hook checks Munki pkginfo files to ensure they are valid.
 
-    - Specify your preferred list of pkginfo catalogs, if you wish to enforce it, followed by `--` to signal the end of the list:  
+    - Specify your preferred list of pkginfo catalogs, if you wish to enforce it, followed by `--` to signal the end of the list:
         `args: ['--catalogs', 'testing', 'stable', '--']`
 
-    - Specify your preferred list of pkginfo categories, if you wish to enforce it, followed by `--`:  
+    - Specify your preferred list of pkginfo categories, if you wish to enforce it, followed by `--`:
         `args: ['--categories', 'Productivity', 'Design', 'Utilities', 'Web Browsers', '--']`
 
-    - Specify required pkginfo keys, followed by `--`:  
-        `args: ['--required-keys', 'category', 'description', 'developer', 'name', 'version', '--']`  
+    - Specify required pkginfo keys, followed by `--`:
+        `args: ['--required-keys', 'category', 'description', 'developer', 'name', 'version', '--']`
         (default: description, name)
 
+    - Specify an alternate munki repo location by passing the argument:
+        `args: ['--munki-repo', './my_repo_location']`
+        (default: ".")
+
+    - Choose to just warn on missing icons with a flag, note if no other issues exist this will allow pre-commit to pass without seeing the warnings:
+        `args: ['--warn-on-missing-icons]`
+
 - __check-munkiadmin-scripts__
 
     This hook ensures MunkiAdmin scripts are executable.

pre_commit_hooks/check_munki_pkgsinfo.py

@@ -36,12 +36,12 @@ def build_argument_parser():
     )
     parser.add_argument("filenames", nargs="*", help="Filenames to check.")
     parser.add_argument(
-        "--munki_repo",
+        "--munki-repo",
         default=".",
         help="path to local munki repo defaults to '.'"
     )
     parser.add_argument(
-        "--warn_on_missing_icons",
+        "--warn-on-missing-icons",
         help="If added, this will only warn on missing icons.",
         action="store_true",
         default=False,