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#!/usr/bin/env python
# Creates a man page from a C file.
# Lines beginning with /// are treated as Markdown.
# Non-blank lines immediately following a /// line are treated
# as function signatures or examples and included verbatim. The
# immediately preceding markdown chunk is printed after the example
# as a comment on it.
# That's about it!
import sys
import re
if len(sys.argv) > 1:
sourcefile = sys.argv[1]
else:
print("Usage: make_man_page.py sourcefile")
exit(1)
special_comment_re = re.compile('^\/\/\/ ?')
blank_re = re.compile('^\s*$')
macro_re = re.compile('CMARK_EXPORT *')
mdlines = []
chunk = []
sig = []
with open(sourcefile, 'r') as cmarkh:
state = 'default'
for line in cmarkh:
# state transition
oldstate = state
if special_comment_re.match(line):
state = 'markdown'
elif blank_re.match(line):
state = 'default'
elif state == 'markdown':
state = 'signature'
# handle line
#if oldstate != state and len(mdlines) > 0 and mdlines[-1] != '\n':
# mdlines.append('\n')
if state == 'markdown':
chunk.append(re.sub(special_comment_re, '', line))
elif state == 'signature':
sig.append(' ' + re.sub(macro_re, '', line))
elif oldstate == 'signature' and state != 'signature':
if len(mdlines) > 0 and mdlines[-1] != '\n':
mdlines.append('\n')
mdlines += sig # add sig, then prepended markdown comment
if len(mdlines) > 0 and mdlines[-1] != '\n':
mdlines.append('\n')
mdlines += chunk
chunk = []
sig = []
elif oldstate == 'markdown' and state != 'signature':
if len(mdlines) > 0 and mdlines[-1] != '\n':
mdlines.append('\n')
mdlines += chunk # add markdown chunk
chunk = []
mdlines.append('\n')
sys.stdout.write(''.join(mdlines))
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