#!/usr/bin/python

import sys, re, os, initdutils

if len(sys.argv) > 1:
    initfile = sys.argv[1]
    # If the absolute path isn't specified, assume it's relative to
    # cwd; if that doesn't exist, try /etc/init.d
    ap = os.path.abspath(initfile)
    if os.path.exists(ap):
        initfile = ap
    else:
        initfile = os.path.join('/etc/init.d', initfile)
else:
    print >> sys.stderr, 'Usage: %s /etc/init.d/<init-script>' % sys.argv[0]
    sys.exit(1)

headers = initdutils.scan_initfile(initfile)

provides = headers.get('Provides')
if provides:
    facilities = initdutils.load_facilities()
    depends = initdutils.load_depends()

    for facility in provides:
        if facility in facilities:
            entries = {}
            for entry in facilities[facility].items():
                if entry[0] != initfile:
                    entries[entry[0]] = entry[1]
            facilities[facility] = entries

    for (initscript, needed) in depends.iteritems():
        for facility in needed:
            if facility[0] == "$":
                continue
            if not facilities.get(facility) and facility in provides:
                print >> sys.stderr, 'Unable to remove %s: %s needs %s\n' % (
                    initfile, initscript, facility)
                sys.exit(1)

    if initfile in depends:
        del depends[initfile]
        initdutils.save_depends(depends)

    initdutils.save_facilities(facilities)

initfile = initfile.replace('/etc/init.d/', '')
os.system('/usr/sbin/update-rc.d -f %s remove' % initfile)