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Diffstat (limited to 'plugins/literasc.py')
-rwxr-xr-x | plugins/literasc.py | 113 |
1 files changed, 113 insertions, 0 deletions
diff --git a/plugins/literasc.py b/plugins/literasc.py new file mode 100755 index 0000000..b7b65cd --- /dev/null +++ b/plugins/literasc.py @@ -0,0 +1,113 @@ +#!/usr/bin/env python +# -*- coding: utf-8 -*- +# +# Literasc, a simple literate programming tool for C, C++, and Turtle. +# Copyright 2012 David Robillard <d@drobilla.net> +# +# Unlike many LP tools, this tool uses normal source code as input, there is no +# tangle/weave and no special file format. The literate parts of the program +# are written in comments, which are emitted as paragraphs of regular text +# interleaved with code. Asciidoc is both the comment and output syntax. + +import os +import re +import sys + +def format_text(text): + 'Format a text (comment) fragment and return it as a marked up string' + return '\n\n' + re.sub('\n *', '\n', text.strip()) + '\n\n' + +def format_code(lang, code): + if code.strip() == '': + return code + + head = '[source,%s]' % lang + sep = '-' * len(head) + '\n' + return head + '\n' + sep + code.strip('\n') + '\n' + sep + +def format_c_source(filename, file): + output = '=== %s ===\n' % os.path.basename(filename) + chunk = '' + prev_c = 0 + in_comment = False + in_comment_start = False + n_stars = 0 + code = '' + for line in file: + code += line + + for c in code: + if prev_c == '/' and c == '*': + output += format_code('c', chunk[0:len(chunk)-1]) + in_comment = True + in_comment_start = True + n_stars = 1 + chunk = '' + elif in_comment and prev_c == '*' and c == '/': + if n_stars > 2: + output += format_text(chunk[0:len(chunk)-1]) + in_comment = False + in_comment_start = False + chunk = '' + elif in_comment_start and c == '*': + n_stars += 1 + else: + chunk += c + prev_c = c + + return output + format_code('c', chunk) + +def format_ttl_source(filename, file): + output = '=== %s ===\n' % os.path.basename(filename) + + in_comment = False + chunk = '' + for line in file: + is_comment = line.strip().startswith('#') + if in_comment: + if is_comment: + chunk += line.strip().lstrip('# ') + ' \n' + else: + output += format_text(chunk) + in_comment = False + chunk = line + else: + if is_comment: + output += format_code('txt', chunk) + in_comment = True + chunk = line.strip().lstrip('# ') + ' \n' + else: + chunk += line + + if in_comment: + return output + format_text(chunk) + else: + return output + format_code('txt', chunk) + +def gen(out, filenames): + for filename in filenames: + file = open(filename) + if not file: + sys.stderr.write('Failed to open file %s\n' % filename) + continue + + if filename.endswith('.c'): + out.write(format_c_source(filename, file)) + elif filename.endswith('.ttl') or filename.endswith('.ttl.in'): + out.write(format_ttl_source(filename, file)) + elif filename.endswith('.txt'): + for line in file: + out.write(line) + out.write('\n') + else: + sys.stderr.write("Unknown source format `%s'" % ( + filename[filename.find('.'):])) + + file.close() + +if __name__ == "__main__": + if len(sys.argv) < 2: + sys.stderr.write('Usage: %s FILENAME...\n' % sys.argv[1]) + sys.exit(1) + + gen(sys.argv[1:]) |