Commit
•
837ceb8
1
Parent(s):
7991dd4
Create render_mermaid.py
Browse files- render_mermaid.py +102 -0
render_mermaid.py
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import argparse
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import os
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import sys
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import time
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from selenium import webdriver
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from selenium.webdriver.chrome.options import Options
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from selenium.webdriver.chrome.service import Service # Import Service
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from webdriver_manager.chrome import ChromeDriverManager
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def render_mermaid(mermaid_code, output_path):
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# Create an HTML file with the Mermaid code
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mermaid_html = f"""
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<!DOCTYPE html>
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<html>
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<head>
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<meta charset="utf-8">
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<script src="https://unpkg.com/mermaid@9/dist/mermaid.min.js"></script>
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</head>
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<body>
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<div class="mermaid">
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{mermaid_code}
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</div>
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<script>
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mermaid.initialize({{ startOnLoad: true }});
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</script>
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</body>
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</html>
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"""
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# Write the HTML content to a temporary file
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temp_html_file = "temp_mermaid.html"
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with open(temp_html_file, "w", encoding="utf-8") as file:
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file.write(mermaid_html)
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# Set up Selenium with headless Chrome
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chrome_options = Options()
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chrome_options.add_argument("--headless")
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chrome_options.add_argument("--disable-gpu") # Add this line for compatibility
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chrome_options.add_argument("--no-sandbox") # Add this line if running as root
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chrome_options.add_argument(
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"--disable-dev-shm-usage"
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) # Overcome limited resource problems
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# Initialize the WebDriver using Service
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service = Service(ChromeDriverManager().install())
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driver = webdriver.Chrome(service=service, options=chrome_options)
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try:
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# Open the HTML file in the browser
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driver.get("file://" + os.path.abspath(temp_html_file))
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# Wait for the diagram to render
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time.sleep(2) # Increase if necessary
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# Find the diagram element
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element = driver.find_element("css selector", ".mermaid")
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# Take a screenshot of the element
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element.screenshot(output_path)
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except Exception as e:
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print(f"Error during rendering: {e}")
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raise e
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finally:
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# Close the browser and clean up
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driver.quit()
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os.remove(temp_html_file)
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if __name__ == "__main__":
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parser = argparse.ArgumentParser(description="Render Mermaid diagram to an image.")
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parser.add_argument("--code", type=str, help="Mermaid code as a string.")
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parser.add_argument(
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"--input", type=str, help="Path to a file containing Mermaid code."
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)
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parser.add_argument(
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"--output", type=str, default="diagram.png", help="Output image file path."
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)
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args = parser.parse_args()
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if args.code:
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mermaid_code = args.code
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elif args.input:
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with open(args.input, "r", encoding="utf-8") as f:
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mermaid_code = f.read()
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else:
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# Read from standard input
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print("Please enter your Mermaid code (Press Ctrl+D to end input):")
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mermaid_code = sys.stdin.read()
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if not mermaid_code.strip():
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print("Error: No Mermaid code provided.")
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exit(1)
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output_path = args.output
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try:
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render_mermaid(mermaid_code, output_path)
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print(f"Diagram saved to {output_path}")
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except Exception as e:
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print(f"Error rendering diagram: {e}")
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exit(1)
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