88 lines
2.3 KiB
Python
88 lines
2.3 KiB
Python
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import re
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import sys
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import os
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def print_usage():
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print(f"usage: python {sys.argv[0]} INPUT")
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sys.exit(1)
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argc = len(sys.argv)
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if argc < 2:
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print_usage()
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def error(message):
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print(f"error: {message}:", file=sys.stderr)
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sys.exit(1)
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path = sys.argv[1]
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if not os.path.isfile(path):
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error(f"{path} does not exist.")
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def read_metadata(path):
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pattern = re.compile(r"^\+{3}\n((?:.*|\n)*)\n\+{3}")
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metadata = {}
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with open(path) as f:
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match = re.search(pattern, f.read())
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if not match:
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error(f"no metadata found at start of {path}")
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lines = match.group(1).split('\n')
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for l in lines:
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pair = [s.strip() for s in l.split('=')]
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metadata[pair[0]] = pair[1]
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return metadata
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def strip_metadata(path):
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pattern = re.compile(r"(\+{3}\n(?:.*|\n)*\n\+{3})")
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with open(path) as f:
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return re.sub(pattern, "", f.read()).strip()
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def generate_header(metadata):
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if metadata is None:
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error("no metadata, can't generate header")
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# TODO: is the description meta tag length-restricted?
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description = metadata["description"]
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keywords = metadata["keywords"]
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# if "description" or "keywords" don't exist we can't do anything: crash out
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if description is None or keywords is None:
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error("empty metadata parameters, can't generate header")
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header = """<head>
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<meta charset="UTF-8"/>
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<meta name="viewport" content="width=device-width, initial-scale=1.0 minimum-scale=1" />
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<meta name="description" content="{{DESCRIPTION}}" />
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<meta name="keywords" content="{{KEYWORDS}}"/>
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<link rel="canonical" href="https://ktyl.dev/">
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<link rel="stylesheet" href="styles.css" />
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<link rel="icon" type="image/x-icon" href="favicon.ico" />
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<script src="https://kit.fontawesome.com/ad50bb2e16.js" crossorigin="anonymous"></script>
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</head>"""
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header = header.replace("{{DESCRIPTION}}", description)
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header = header.replace("{{KEYWORDS}}", keywords)
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return header
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html = strip_metadata(path)
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metadata = read_metadata(path)
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header = generate_header(metadata)
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# Inject the generated <head> element between the opening <html> and <body> elements.
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pattern = r"(<html>)(?:\n|.)*(<body>)"
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replacement = f"\\1\\n{header}\\n\\2"
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html = re.sub(pattern, replacement, html)
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print(html)
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