1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202
|
#!/usr/bin/env python
import os, sys
from optparse import OptionParser
from zeroinstall.injector import reader, model
from zeroinstall import support, alias, helpers
from zeroinstall.support import basedir
def export(name, value):
"""Try to guess the command to set an environment variable."""
shell = os.environ.get('SHELL', '?')
if 'csh' in shell:
return "setenv %s %s" % (name, value)
return "export %s=%s" % (name, value)
def find_path(paths):
"""Find the first writable path in : separated list."""
for path in paths:
if os.path.realpath(path).startswith(basedir.xdg_cache_home):
pass # print "Skipping cache", first_path
elif not os.access(path, os.W_OK):
pass # print "No access", first_path
else:
break
else:
return None
return path
# Do this here so we can include it in the help message.
# But, don't abort if there isn't one because we might
# be doing something else (e.g. --manpage)
first_path = find_path(os.environ['PATH'].split(':'))
parser = OptionParser(usage="usage: %%prog [options] alias [interface [command]]\n\n"
"Creates a script in the first usable directory in $PATH\n"
"(%s) to run 'interface' unless overridden by --dir.\n"
"If no interface is given, edits the policy for an existing alias.\n"
"For interfaces providing more than one command, the desired command\n"
"may also be given." % first_path)
parser.add_option("-m", "--manpage", help="show the manual page for an existing alias", action='store_true')
parser.add_option("-r", "--resolve", help="show the URI for an alias", action='store_true')
parser.add_option("-V", "--version", help="display version information", action='store_true')
parser.add_option("-d", "--dir", help="install in DIR", dest="user_path", metavar="DIR")
parser.disable_interspersed_args()
(options, args) = parser.parse_args()
if options.version:
import zeroinstall
print "0alias (zero-install) " + zeroinstall.version
print "Copyright (C) 2007 Thomas Leonard"
print "This program comes with ABSOLUTELY NO WARRANTY,"
print "to the extent permitted by law."
print "You may redistribute copies of this program"
print "under the terms of the GNU Lesser General Public License."
print "For more information about these matters, see the file named COPYING."
sys.exit(0)
if options.manpage:
if len(args) != 1:
os.execlp('man', 'man', *args)
sys.exit(1)
if len(args) < 1 or len(args) > 3:
parser.print_help()
sys.exit(1)
alias_prog, interface_uri, main = (list(args) + [None, None])[:3]
if options.resolve or options.manpage:
if interface_uri is not None:
parser.print_help()
sys.exit(1)
if options.user_path:
first_path = options.user_path
if not os.path.isdir(first_path):
print >>sys.stderr, "Directory '%s' does not exist." % first_path
sys.exit(1)
if interface_uri is None:
try:
if not os.path.isabs(alias_prog):
full_path = support.find_in_path(alias_prog)
if not full_path:
raise alias.NotAnAliasScript("Not found in $PATH: " + alias_prog)
else:
full_path = alias_prog
interface_uri, main = alias.parse_script(full_path)
except alias.NotAnAliasScript, ex:
if options.manpage:
os.execlp('man', 'man', *args)
print >>sys.stderr, str(ex)
sys.exit(1)
interface_uri = model.canonical_iface_uri(interface_uri)
if options.resolve:
print interface_uri
sys.exit(0)
if options.manpage:
sels = helpers.ensure_cached(interface_uri)
if not sels:
# Cancelled by user
sys.exit(1)
selected_impl = sels.selections[interface_uri]
if selected_impl.id.startswith('/'):
impl_path = selected_impl.id
else:
from zeroinstall.injector.iface_cache import iface_cache
impl_path = iface_cache.stores.lookup(selected_impl.id)
if main is None:
main = selected_impl.main
if main is None:
print >>sys.stderr, "No main program for interface '%s'" % interface_uri
sys.exit(1)
prog_name = os.path.basename(main)
alias_name = os.path.basename(args[0])
assert impl_path
# TODO: the feed should say where the man-pages are, but for now we'll accept
# a directory called man in some common locations...
for mandir in ['man', 'share/man', 'usr/man', 'usr/share/man']:
manpath = os.path.join(impl_path, mandir)
if os.path.isdir(manpath):
# Note: unlike "man -M", this also copes with LANG settings...
os.environ['MANPATH'] = manpath
os.execlp('man', 'man', prog_name)
sys.exit(1)
# No man directory given or found, so try searching for man files
manpages = []
for root, dirs, files in os.walk(impl_path):
for f in files:
if f.endswith('.gz'):
manpage_file = f[:-3]
else:
manpage_file = f
if manpage_file.endswith('.1') or \
manpage_file.endswith('.6') or \
manpage_file.endswith('.8'):
manpage_prog = manpage_file[:-2]
if manpage_prog == prog_name or manpage_prog == alias_name:
os.execlp('man', 'man', os.path.join(root, f))
sys.exit(1)
else:
manpages.append((root, f))
print "No matching manpage was found for '%s' (%s)" % (alias_name, interface_uri)
if manpages:
print "These non-matching man-pages were found, however:"
for root, file in manpages:
print os.path.join(root, file)
sys.exit(1)
if first_path is None:
print >>sys.stderr, ("No writable non-cache directory in $PATH, which currently contains:\n\n%s\n\n"
"To create a directory for your scripts, use these commands:\n"
"$ mkdir ~/bin\n"
"$ %s\n"
"or specify a writable path with --path"
% ('\n'.join(os.environ['PATH'].split(':')), export('PATH', '$HOME/bin:$PATH')))
sys.exit(1)
if len(args) == 1:
os.execlp('0launch', '0launch', '-gd', '--', interface_uri)
sys.exit(1)
try:
interface = model.Interface(interface_uri)
if not reader.update_from_cache(interface):
print >>sys.stderr, "Interface '%s' not currently in cache. Fetching..." % interface_uri
if os.spawnlp(os.P_WAIT, '0launch', '0launch', '-d', interface_uri):
raise model.SafeException("0launch failed")
if not reader.update_from_cache(interface):
raise model.SafeException("Interface still not in cache. Aborting.")
script = os.path.join(first_path, alias_prog)
if os.path.exists(script):
raise model.SafeException("File '%s' already exists. Delete it first." % script)
sys.exit(1)
except model.SafeException, ex:
print >>sys.stderr, ex
sys.exit(1)
wrapper = file(script, 'w')
alias.write_script(wrapper, interface_uri, main)
# Make new script executable
os.chmod(script, 0111 | os.fstat(wrapper.fileno()).st_mode)
wrapper.close()
print "Created script '%s'." % script
print "To edit policy: 0alias %s" % alias_prog
print "(note: some shells require you to type 'rehash' now)"
|