Add debug mode

README.md

@@ -69,3 +69,20 @@ Please keep in mind that graphviz-py executes all Python code in the diagram. So
 
 ## Coming soon
 - Compartibility with asciidoctor-diagram ([Status: Implemented & Approved, waiting for merging](https://github.com/asciidoctor/asciidoctor-diagram/pull/379))
+
+## Arguments
+```bash
+# graphviz-py --help
+usage: graphviz-py [-h] [-v] [-d] [-a ARGUMENT] [files [files ...]]
+
+graphviz-py diagram builder
+
+positional arguments:
+  files                 the paths to the graphviz-py files
+
+optional arguments:
+  -h, --help            show this help message and exit
+  -v, --version         show program's version number and exit
+  -d, --debug           show debug information
+  -a ARGUMENT, --argument ARGUMENT
+```

graphviz_py/cli.py

@@ -1,5 +1,6 @@
 import sys
 import argparse
+import logging
 from pathlib import Path
 
 from graphviz_py.graphviz import execute_graphviz
@@ -8,15 +9,19 @@
 
 parser = argparse.ArgumentParser(description='graphviz-py diagram builder')
 parser.add_argument('-v', '--version', action='version', version=f'{Project.name()} version: {Project.version()}')
+parser.add_argument('-d', '--debug', action='store_true', help='show debug information')
 parser.add_argument('-a', '--argument', action='append')
-parser.add_argument('files', type=Path, nargs=argparse.ZERO_OR_MORE, help='an integer for the accumulator')
+parser.add_argument('files', type=Path, nargs=argparse.ZERO_OR_MORE, help='the paths to the graphviz-py files')
 
 args, unknown = parser.parse_known_args()
 
 
 def main(_=None):
     """Process command line arguments."""
 
+    if args.debug:
+        logging.getLogger().setLevel(logging.DEBUG)
+
     file_contents = []
     arguments = []
 

pyproject.toml

@@ -1,6 +1,6 @@
 [tool.poetry]
 name = "graphviz-py"
-version = "1.0.3"
+version = "1.0.4"
 description = "Allows Python code execution inside of graphviz diagrams."
 authors = ["Alwin Schuster <[email protected]>"]
 license = 'MPL-2.0'
@@ -11,7 +11,7 @@ readme = "README.md"
 keywords = ["graphviz", "dot", "python", "graphviz-python", "gv"]
 
 [tool.poetry.dependencies]
-python = ">=3.7.0"
+python = ">=3.8.0"
 
 [tool.poetry.scripts]
 graphviz-py = "graphviz_py.cli:main"