Bug#840094: blends-dev: Does not recognize multiline dependencies

[debian@liska.ath.cx]

Hi Petter,

On 11.11.2016 11:03, Petter Reinholdtsen wrote:
> [Ole Streicher]
>> I updated all tasks of debian-edu to be RFC834 compliant: continuation
>> with indentation, no backslashes, no duplicated keywords. The diff looks
>> OK for me; you should however double check.
>>
>> If you don't like it, revert and discuss it.
> This is not going to fly.  The Debian Edu task files in git are
> processed automatically several times a day to build the ISOs on a
> machine running Jessie, so depending on a non-released version of the
> blends package is not a viable option at the moment.

OK, I committed another version, with backslashes everywhere. Adjusted
tool is attached.

> I believe the only change we should do to the git version before the new
> blend version is in stable is to drop the double
> Depends/Recommends/Suggests lines.  Otherwise we break the ISO builds.
>
> The whitespace changes make it harder to track the history of the
> tasks.  Can you avoid whitespace changes?
>

I tried as much as possible. However, trailing spaces are still removed,
and the backslash now always is preceded by a space.

Cheers

Ole

#!/usr/bin/env python3

from __future__ import print_function

from glob import glob
from collections import OrderedDict
import re

def format_section(s):
    return "\n".join(l[1] for l in s.values()) + "\n"

def format_task(sections):
    return "\n".join(format_section(s) for s in sections)
        
def get_task(f, eol=""):
    key = ""
    items = OrderedDict()
    sections = []
    for l in f.readlines():
        backslash = "\\" in l
        l = l.replace("\\","").rstrip()
        if not l and not backslash:
            if items:
                sections.append(items)
            items = OrderedDict()
            key = ""
            continue
        m = re.match(r"^(\S+):(\s*)(.*)", l)
        if m is not None:
            key = m.group(1)
            if key in items:
                if key in ("Depends", "Ignore", "Avoid",
                           "Recommends", "Suggests"):
                    items[key][1] += "," + eol
                items[key][1] += "\n " + " " * items[key][0] + m.group(3).strip()
            else:
                if key in ("Depends", "Ignore", "Avoid",
                               "Recommends", "Suggests", "Why"):
                    indent = len(key) + len(m.group(2))
                else:
                    indent = 0
                items[key] = [indent, m.group(0).strip()]
        else:
            if items:
                if key in ("Depends", "Ignore", "Avoid",
                           "Recommends", "Suggests"):
                    items[key][1] += eol
            items[key][1] += "\n" + l
    sections.append(items)
    return sections

for taskname in glob("tasks/*"):
    with open(taskname) as taskfile:
        s = format_task(get_task(taskfile, " \\"))
    with open(taskname, "w") as taskfile:
        taskfile.write(s)