README.md: Add supported arguments and examples

Add supported arguments
Update examples after changing entry points arguments

README.md

@@ -4,28 +4,75 @@ Docker image verifying the code format with clang-format
 
 ## Getting Started
 
-The following command will mount the current working directory folder to the `src` working directory, and check its format
+The following command will mount the current working directory folder to the `src` working directory, and recursively check the format of source files in `src` and  `include` directories, as well as `file.cpp`
 
-`docker run --rm -v $(pwd):/src witekio/clang-format-checker`
+`docker run --rm -v $(pwd):/src witekio/clang-format-checker -r src includes file.cpp`
 
-The return code will be
+## Output
+
+The return code of the `docker run` will be
 * `non-zero` if any formatting errors are found, and printed in the standard output.
 * `0` if no issue was found
 
 ```
-$ docker run -v $(pwd):/src --rm witekio/clang-format-checker                                      2 ↵
+# Recursively check all files from current folder
+$ docker run -v $(pwd):/src --rm witekio/clang-format-checker -r .                                 2 ↵
 --- ./testCode/File.cpp	(original)
 +++ ./testCode/File.cpp	(reformatted)
 @@ -3,18 +3,13 @@
  
  #include "MyHeader.h"
- 
--MyClass::MyClass() 
-+MyClass::MyClass()
--    : arg(new Other(std::string("string"), 4))
+MyClass::MyClass()
+-    : arg(new    Other( std::string(  "string"),      4))
 +  : arg(new Other(std::string("string"), 4))
 ```
 
+## Specifying the code style
+
+The style used by `clang-format` can be defined by providing a `.clang-format` file in your source folder. For more information, see [clang-format style options](https://clang.llvm.org/docs/ClangFormatStyleOptions.html)
+
+## Supported arguments
+
+Folders and files can be excluded with `--exclude`
+```
+# Check recursively .h/.cpp files excluding 'vendors' folder and '*_test.cpp'
+docker run -v $(pwd):/src --rm witekio/clang-format-checker -r  --exclude src/third_party --exclude '*_test.cpp' src include foo.cpp
+```
+
+`run-clang-format.py` help
+```
+usage: run-clang-format.py [-h] [--clang-format-executable EXECUTABLE]
+                           [--extensions EXTENSIONS] [-r] [-q] [-j N]
+                           [--color {auto,always,never}] [-e PATTERN]
+                           file [file ...]
+
+A wrapper script around clang-format, suitable for linting multiple files and
+to use for continuous integration. This is an alternative API for the clang-
+format command line. It runs over multiple files and directories in parallel.
+A diff output is produced and a sensible exit code is returned.
+
+positional arguments:
+  file
+
+optional arguments:
+  -h, --help            show this help message and exit
+  --clang-format-executable EXECUTABLE
+                        path to the clang-format executable
+  --extensions EXTENSIONS
+                        comma separated list of file extensions (default:
+                        c,h,C,H,cpp,hpp,cc,hh,c++,h++,cxx,hxx)
+  -r, --recursive       run recursively over directories
+  -q, --quiet
+  -j N                  run N clang-format jobs in parallel (default number of
+                        cpus + 1)
+  --color {auto,always,never}
+                        show colored diff (default: auto)
+  -e PATTERN, --exclude PATTERN
+                        exclude paths matching the given glob-like pattern(s)
+                        from recursive search
+```
+For more information, you can check [`run-clang-format` official repository](https://github.com/Sarcasm/run-clang-format).
+
 ## CI Integration
 
 ### BitBucket Pipeline
@@ -41,18 +88,6 @@ pipelines:
           - run-clang-format.py -r src
 ```
 
-## Changing the style
-
-The style used by `clang-format` can be defined by providing a `.clang-format` file in your source folder. For more information, see [clang-format style options](https://clang.llvm.org/docs/ClangFormatStyleOptions.html)
-
-## Specify the files to check
-
-Check recursively .h/.cpp files excluding `vendors` folder
-
-`docker run --rm -v $(pwd):/src witekio/clang-format-checker "--extensions=h,cpp --exclude vendors"`
-
-For more information, you can check [`run-clang-format`](https://github.com/Sarcasm/run-clang-format) repository
-
 ## License
 
 This project is licensed under the MIT License - see the [LICENSE.md](LICENSE.md) file for details