doc/gendoc.py

bdiff: normalize the diff (issue1295)

When the common part of a diff can be moved forward, move it forward.
Otherwise we don't get deterministic results (it would depends on the way we
split for the recursion).
That way we get identical hunks when doing the same change, it helps to solve
issue1295 (inconsistent diffs on different side during a merge).

import sys, textwrap
# import from the live mercurial repo
sys.path.insert(0, "..")
from mercurial import demandimport; demandimport.enable()
from mercurial.commands import table, globalopts
from mercurial.i18n import gettext, _
from mercurial.help import helptable

def get_desc(docstr):
    if not docstr:
        return "", ""
    # sanitize
    docstr = docstr.strip("\n")
    docstr = docstr.rstrip()
    shortdesc = docstr.splitlines()[0].strip()

    i = docstr.find("\n")
    if i != -1:
        desc = docstr[i+2:]
    else:
        desc = "    %s" % shortdesc
    return (shortdesc, desc)

def get_opts(opts):
    for shortopt, longopt, default, desc in opts:
        allopts = []
        if shortopt:
            allopts.append("-%s" % shortopt)
        if longopt:
            allopts.append("--%s" % longopt)
        desc += default and _(" (default: %s)") % default or ""
        yield(", ".join(allopts), desc)

def get_cmd(cmd):
    d = {}
    attr = table[cmd]
    cmds = cmd.lstrip("^").split("|")

    d['synopsis'] = attr[2]
    d['cmd'] = cmds[0]
    d['aliases'] = cmd.split("|")[1:]
    d['desc'] = get_desc(attr[0].__doc__)
    d['opts'] = list(get_opts(attr[1]))
    return d


def show_doc(ui):
    def bold(s, text=""):
        ui.write("%s\n%s\n%s\n" % (s, "="*len(s), text))
    def underlined(s, text=""):
        ui.write("%s\n%s\n%s\n" % (s, "-"*len(s), text))

    # print options
    underlined(_("OPTIONS"))
    for optstr, desc in get_opts(globalopts):
        ui.write("%s::\n    %s\n\n" % (optstr, desc))

    # print cmds
    underlined(_("COMMANDS"))
    h = {}
    for c, attr in table.items():
        f = c.split("|")[0]
        f = f.lstrip("^")
        h[f] = c
    cmds = h.keys()
    cmds.sort()

    for f in cmds:
        if f.startswith("debug"): continue
        d = get_cmd(h[f])
        # synopsis
        ui.write("[[%s]]\n" % d['cmd'])
        ui.write("%s::\n" % d['synopsis'].replace("hg ","", 1))
        # description
        ui.write("%s\n\n" % d['desc'][1])
        # options
        opt_output = list(d['opts'])
        if opt_output:
            opts_len = max([len(line[0]) for line in opt_output])
            ui.write(_("    options:\n"))
            for optstr, desc in opt_output:
                if desc:
                    s = "%-*s  %s" % (opts_len, optstr, desc)
                else:
                    s = optstr
                s = textwrap.fill(s, initial_indent=4 * " ",
                                  subsequent_indent=(6 + opts_len) * " ")
                ui.write("%s\n" % s)
            ui.write("\n")
        # aliases
        if d['aliases']:
            ui.write(_("    aliases: %s\n\n") % " ".join(d['aliases']))

    # print topics
    for names, section, doc in helptable:
        underlined(gettext(section).upper())
        if callable(doc):
            doc = doc()
        ui.write(gettext(doc))
        ui.write("\n")

if __name__ == "__main__":
    show_doc(sys.stdout)