view docs/tutorial/mypandocfilters/graphviz-file.py @ 5011:04104042c6ad

evolve: delete redundant and incorrect code for updating dirstate

In relocate() when we notice conflicts, we will try to fix up the
dirstate by calling copies.duplicatecopies() and
dirstatedance(). However, we had called _evolvemerge() just before
that point and that has already fixed up the dirstate, so there's no
need to do it again. Also, we did it incorrectly as the test case
shows.

#!/usr/bin/env python

"""
Pandoc filter to process code blocks with class "graphviz" into
graphviz-generated images.

Needs pygraphviz
"""

import os
import sys

import pygraphviz

from pandocfilters import toJSONFilter, Para, Image, get_filename4code, get_caption, get_extension, get_value

def graphviz(key, value, format, _):
    if key == 'CodeBlock':
        [[ident, classes, keyvals], file] = value
        if "graphviz-file" in classes:
            caption, typef, keyvals = get_caption(keyvals)
            prog, keyvals = get_value(keyvals, u"prog", u"dot")
            filetype = get_extension(format, "svg", html="svg", latex="pdf")
            with open(file) as f:
                code = f.read()
            dest = get_filename4code("graphviz", code, filetype)

            if not os.path.isfile(dest):
                g = pygraphviz.AGraph(string=code)
                g.layout()
                g.draw(dest, prog=prog)
                sys.stderr.write('Created image ' + dest + '\n')

            return Para([Image([ident, ['graphviz'], keyvals], caption, [dest, typef])])

if __name__ == "__main__":
    toJSONFilter(graphviz)