Update readme

README.md

@@ -1,5 +1,10 @@
 Yamale (ya·ma·lē)
 =================
+[![Build Status](https://github.com/23andMe/Yamale/actions/workflows/run-tests.yml/badge.svg)](https://github.com/23andMe/Yamale/actions/workflows/run-tests.yml)
+[![PyPI](https://img.shields.io/pypi/v/yamale.svg)](https://pypi.python.org/pypi/yamale)
+[![downloads](https://static.pepy.tech/badge/yamale/month)](https://pepy.tech/project/yamale)
+[![versions](https://img.shields.io/pypi/pyversions/yamale.svg)](https://github.com/yamale/yamale)
+[![license](https://img.shields.io/github/license/23andMe/yamale.svg)](https://github.com/23andMe/Yamale/blob/master/LICENSE)
 
 | :warning: Ensure that your schema definitions come from internal or trusted sources. Yamale does not protect against intentionally malicious schemas. |
 |:------------|
@@ -11,8 +16,6 @@ A schema and validator for YAML.
 What's YAML? See the current spec [here](http://www.yaml.org/spec/1.2/spec.html) and an introduction
 to the syntax [here](https://github.com/Animosity/CraftIRC/wiki/Complete-idiot's-introduction-to-yaml).
 
-[![Build Status](https://github.com/23andMe/Yamale/actions/workflows/run-tests.yml/badge.svg)](https://github.com/23andMe/Yamale/actions/workflows/run-tests.yml)
-[![PyPI](https://img.shields.io/pypi/v/yamale.svg)](https://pypi.python.org/pypi/yamale)
 
 Requirements
 ------------
@@ -25,6 +28,8 @@ Install
 ### pip
 ```bash
 $ pip install yamale
+# or to include ruamel.yaml as a dependency
+$ pip install yamale[ruamel]
 ```
 
 NOTE: Some platforms, e.g., Mac OS, may ship with only Python 2 and may not have pip installed.
@@ -66,7 +71,7 @@ options:
   -p PARSER, --parser PARSER
                         YAML library to load files. Choices are "ruamel" or "pyyaml" (default).
   -n CPU_NUM, --cpu-num CPU_NUM
-                        number of child processes to spawn for validation. Default is 4. 'auto' to use CPU count
+                        number of child processes to spawn for validation. Default is 4. 'auto' to use CPU count.
   -x, --no-strict       disable strict mode, unexpected elements in the data will be accepted.
   -v, --verbose         show verbose information
   -V, --version         show program's version number and exit

setup.py

@@ -18,7 +18,7 @@
     packages=find_packages(),
     include_package_data=True,
     install_requires=["pyyaml"],
-    extras_requires={"ruamel": ["ruamel.yaml"]},
+    extras_require={"ruamel": ["ruamel.yaml"]},
     python_requires=">=3.8",
     entry_points={
         "console_scripts": ["yamale=yamale.command_line:main"],

yamale/command_line.py

@@ -68,7 +68,6 @@ def _find_schema(data_path, schema_name):
 def _validate_file(yaml_path, schema_name, parser, strict, should_exclude):
     if should_exclude(yaml_path):
         return
-    print("Validating %s..." % yaml_path)
     s = _find_schema(yaml_path, schema_name)
     if not s:
         raise ValueError("Invalid schema name for '{}' or schema not found.".format(schema_name))
@@ -79,7 +78,6 @@ def _validate_dir(root, schema_name, cpus, parser, strict, should_exclude):
     pool = multiprocessing.Pool(processes=cpus)
     res = []
     error_messages = []
-    print("Finding yaml files...")
     for root, _, files in os.walk(root):
         for f in files:
             if (f.endswith(".yaml") or f.endswith(".yml")) and f != schema_name:
@@ -90,10 +88,9 @@ def _validate_dir(root, schema_name, cpus, parser, strict, should_exclude):
                 if schema_path:
                     res.append(pool.apply_async(_validate, (schema_path, yaml_path, parser, strict, False)))
                 else:
-                    print("No schema found for: %s" % yaml_path)
+                    print(f"No schema found for: {yaml_path}")
 
-    print("Found %s yaml files." % len(res))
-    print("Validating...")
+    print(f"Found {len(res)} yaml files to validate...")
     for r in res:
         sub_results = r.get(timeout=300)
         error_messages.extend([str(sub_result) for sub_result in sub_results if not sub_result.isValid()])
@@ -114,8 +111,11 @@ def should_exclude(yaml_path):
 
     for path in paths:
         abs_path = os.path.abspath(path)
-        if not os.path.exists(abs_path):
+        if os.path.exists(abs_path):
+            print(f"Validating {path}...")
+        else:
             raise ValueError(f"Path does not exist: {path}")
+
         if os.path.isdir(abs_path):
             _validate_dir(abs_path, schema_name, cpus, parser, strict, should_exclude)
         else:
@@ -155,7 +155,7 @@ def int_or_auto(num_cpu):
         "--cpu-num",
         default=4,
         type=int_or_auto,
-        help="number of child processes to spawn for validation. Default is 4. 'auto' to use CPU count",
+        help="number of child processes to spawn for validation. Default is 4. 'auto' to use CPU count.",
     )
     parser.add_argument(
         "-x",