python-rosinstall 0.7.7-2 / usr / bin / roslocate

#!/usr/bin/python
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# Author: kwc

"""
Library for locating ROS packages and stacks using the centralized
index at ROS.org.
"""

from __future__ import print_function

NAME = 'roslocate'

import os
import sys
try:
    from os import EX_USAGE
except ImportError:
    EX_USAGE = 0, 1, 2

from optparse import OptionParser
from rosinstall.locate import get_manifest, \
     get_www, get_repo, get_vcs, get_vcs_uri_for_branch,\
     get_rosinstall, InvalidData, BRANCH_RELEASE, BRANCH_DEVEL


def options_to_branch(options):
    # we don't let the user express the full range of options at the
    # command-line, mainly for (1) simplicity and (2) the distro
    # branch is not reliable.
    if options.dev and options.rel:
        sys.exit('only one of --dev and --rel can be used')
    if options.dev:
        return BRANCH_DEVEL
    elif options.rel:
        return BRANCH_RELEASE
    return None

def cmd_get_rosinstall(name, data, type_, options=None):
    branch = options_to_branch(options)
    prefix = options.prefix if options is not None and options.prefix else ''
    return get_rosinstall(name, data, type_, branch, prefix)


def get_type(name, data, type_, options=None):
    return type_


def cmd_get_vcs_uri(name, data, type_, options=None):
    return get_vcs_uri_for_branch(data, options_to_branch(options))


def cmd_get_vcs(name, data, type_, options=None):
    return get_vcs(name, data, type_)


def cmd_get_www(name, data, type_, options=None):
    return get_www(name, data, type_)


def get_description(name, data, type_, options=None):
    if type_ == 'package':
        return """
Type: package
Stack: %s
Description: %s
URL: %s
    """ % (data.get('stack', 'none'), data.get('description', ''), data.get('url', ''))
    elif type_ == 'stack':
        return """
Type: package
Stack: %s
Description: %s
URL: %s
    """ % (data.get('stack', 'none'), data.get('description', ''), data.get('url', ''))
    else:
        return """
Type: %s
Packages: %s
Description: %s
URL: %s
    """ % (type_, ", ".join(data.get('packages', [])), data.get('description', ''), data.get('url', ''))


def cmd_get_repo(name, data, type_, options=None):
    return get_repo(name, data, type_)

################################################################################

# Bind library to commandline implementation


def _fullusage(parser, error=EX_USAGE):
    parser.print_help(file=sys.stderr)
    sys.stderr.write("""
Commands:
  info\t\tGet rosinstall info of resource
  vcs\t\tGet name of source control system
  type\t\tPackage or stack
  uri\t\tGet source control URI of resource
  www\t\tGet web page of resource
  repo\t\tGet repository name of resource
  describe\tGet description of resource
""")
    sys.exit(error)

_cmds = {
    # info/rosinstall are now identical
    'info': cmd_get_rosinstall,
    'rosinstall': cmd_get_rosinstall, #alias
    'vcs': cmd_get_vcs,
    'type': get_type,
    'uri': cmd_get_vcs_uri,
    'repo': cmd_get_repo,
    'www': cmd_get_www,
    'describe': get_description,
    'description': get_description,  # alias
    }


def roslocate_main():
    args = sys.argv

    parser = OptionParser(usage="usage: %prog <command> <resource> <options>", prog=NAME)

    parser.add_option("--prefix",
                      dest="prefix", default=False,
                      metavar="PATH",
                      help="path prefix for rosinstall")

    # TODO: distro-specific return values
    parser.add_option("--distro",
                      dest="distro",
                      help="fetch information for specific ROS distribution release (default: environment variable ROS_DISTRO if defined)")

    # In this implementation, we're optimizing for the use case where
    # the user wishes to do a source-based install of a released
    # stack.  The user also has an efficient flag for specifying that
    # they want a development branch instead.  We are not exposing
    # users to the full range of devel/released/distro branches that
    # the rosinstall file encodes, mainly because the distro branch is
    # not reliable with DVCS systems like git.  Thus, rosinstall
    # abstracts the logic for determining what the correct released
    # branch to use is.
    parser.add_option("--dev",
                      dest="dev", default=False,
                      action="store_true",
                      help="fetch development branch information")
    parser.add_option("--rel",
                      dest="rel", default=False,
                      action="store_true",
                      help="fetch release branch information")

    # parse command
    if '-h' in args or '--help' in args:
        # printing commands in OptionParser is a mess
        _fullusage(parser, error=0)
    if len(args) < 2:
        _fullusage(parser)

    # noop parse for now.  Will matter once we can pass in --distro
    options, args = parser.parse_args()

    cmd = args[0]
    if not cmd in _cmds.keys():
        _fullusage(parser)

    if cmd not in ['info', 'rosinstall'] and options.prefix:
        parser.error('--prefix only allowed with commands info, rosinstall')


    if len(args) != 2:
        parser.error("please provide a resource name (package or stack)")
    name = args[1]

    if not options.distro:
        distro = os.environ['ROS_DISTRO'] if 'ROS_DISTRO' in os.environ else None
        if distro:
            print('Using ROS_DISTRO: %s' % distro, file=sys.stderr)
            options.distro = distro
        else:
            parser.error("please provide the distro name with --distro DISTRO_NAME")

    try:
        data, type_, _ = get_manifest(name, options.distro)
    except IOError:
        sys.exit('cannot locate information about %s\n' % (name))

    try:
        print (_cmds[cmd](name, data, type_, options))
        sys.stdout.flush() # raises correct error when used in a pipe
    except InvalidData as e:
        sys.stderr.write("%s\n" % e)
    except IOError as ioe:
        if ioe.errno == 32:
            sys.exit(ioe)
        raise

if __name__ == '__main__':
    roslocate_main()