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Colorize diff with pygments, and open it in a webpage
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| #!/usr/bin/env python | |
| import sys | |
| import os | |
| import StringIO | |
| import BaseHTTPServer | |
| import cgi | |
| import webbrowser | |
| import pygments | |
| import pygments.lexers | |
| import pygments.formatters | |
| import pygments.util | |
| # Override HtmlFormatter's wrap function so it | |
| # doesn't wrap our result in excess HTML containers | |
| class LineHtmlFormatter(pygments.formatters.HtmlFormatter): | |
| def wrap(self, source, outfile): | |
| return source | |
| DIFF_STYLES = """ | |
| pre { margin: 0px; } | |
| .deletion { background-color: rgba(117, 0, 0, 0.3)} | |
| .addition { background-color: rgba(0, 117, 0, 0.3) } | |
| """ | |
| EXTENSION_OVERRIDE = {'.bindings': '.cs'} | |
| def generate_html(formatter, html_file): | |
| html_file.write("<!DOCTYPE html>") | |
| html_file.write("<html>") | |
| html_file.write("<head>") | |
| html_file.write("<meta charset=\"UTF-8\">") | |
| html_file.write("<style>") | |
| html_file.write(formatter.get_style_defs()) | |
| html_file.write(DIFF_STYLES) | |
| html_file.write("</style></head>") | |
| html_file.write("<body class=\"hll\">") | |
| lexer = None | |
| for line in sys.stdin: | |
| line = line.rstrip('\n') | |
| if not line: | |
| continue | |
| html_file.write("<pre class=\"highlight {}\" >".format({'+': "addition", '-':"deletion"}.get(line[0], ''))) | |
| if line.startswith("--"): | |
| html_file.write(line) | |
| lexer = None | |
| elif line.startswith("+++"): | |
| file_name, file_extension = os.path.splitext(line[4:]) | |
| file_extension = EXTENSION_OVERRIDE.get(file_extension, file_extension) | |
| try: | |
| lexer = pygments.lexers.get_lexer_for_filename(file_name + file_extension) | |
| except pygments.util.ClassNotFound: | |
| print "Warning: missing lexer for {}".format(line[4:]) | |
| html_file.write(line) | |
| elif line.startswith("@") or line.startswith("diff"): | |
| html_file.write(line) | |
| elif lexer and line: | |
| html_file.write(line[0] + pygments.highlight(line[1:], lexer, formatter).rstrip('\n')) | |
| html_file.write("</pre>") | |
| html_file.write('\n') | |
| html_file.write("</body></html>") | |
| if __name__ == "__main__": | |
| formatter = LineHtmlFormatter(style="native") | |
| html_file = StringIO.StringIO() | |
| generate_html(formatter, html_file) | |
| class MemoryFileHandler(BaseHTTPServer.BaseHTTPRequestHandler): | |
| def do_GET(self): | |
| response_body = html_file.getvalue() | |
| self.send_response(200) | |
| self.send_header('Content-Type', 'text/html; encoding=utf8') | |
| self.send_header('Content-Length', len(response_body)) | |
| self.send_header('Connection', 'close') | |
| self.end_headers() | |
| self.wfile.write(response_body) | |
| BaseHTTPServer.BaseHTTPRequestHandler.protocol_version = 'HTTP/1.1' | |
| BaseHTTPServer.SocketServer.TCPServer.allow_reuse_address = True | |
| server = BaseHTTPServer.HTTPServer(('', 8081), MemoryFileHandler) | |
| webbrowser.open("http://localhost:8081/") | |
| # Serve one request, hopefully resulting from the browser session above | |
| server.handle_request() |
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