Source code for galaxy.dependencies

"""
Determine what optional dependencies are needed.
"""
from __future__ import print_function

import sys
from os.path import dirname, join
from xml.etree import ElementTree

import pkg_resources

from galaxy.util import asbool
from galaxy.util.properties import (
    find_config_file,
    load_app_properties
)


[docs]class ConditionalDependencies(object):
[docs]    def __init__(self, config_file):
        self.config_file = config_file
        self.config = None
        self.job_runners = []
        self.authenticators = []
        self.object_stores = []
        self.conditional_reqs = []
        self.parse_configs()
        self.get_conditional_requirements()

[docs]    def parse_configs(self):
        self.config = load_app_properties(config_file=self.config_file)
        job_conf_xml = self.config.get(
            "job_config_file",
            join(dirname(self.config_file), 'job_conf.xml'))
        try:
            for plugin in ElementTree.parse(job_conf_xml).find('plugins').findall('plugin'):
                if 'load' in plugin.attrib:
                    self.job_runners.append(plugin.attrib['load'])
        except (OSError, IOError):
            pass
        object_store_conf_xml = self.config.get(
            "object_store_config_file",
            join(dirname(self.config_file), 'object_store_conf.xml'))
        try:
            for store in ElementTree.parse(object_store_conf_xml).iter('object_store'):
                if 'type' in store.attrib:
                    self.object_stores.append(store.attrib['type'])
        except (OSError, IOError):
            pass

        # Parse auth conf
        auth_conf_xml = self.config.get(
            "auth_config_file",
            join(dirname(self.config_file), 'auth_conf.xml'))
        try:
            for auth in ElementTree.parse(auth_conf_xml).findall('authenticator'):
                auth_type = auth.find('type')
                if auth_type is not None:
                    self.authenticators.append(auth_type.text)
        except (OSError, IOError):
            pass

[docs]    def get_conditional_requirements(self):
        crfile = join(dirname(__file__), 'conditional-requirements.txt')
        for req in pkg_resources.parse_requirements(open(crfile).readlines()):
            self.conditional_reqs.append(req)

[docs]    def check(self, name):
        try:
            name = name.replace('-', '_').replace('.', '_')
            return getattr(self, 'check_' + name)()
        except Exception:
            return False

[docs]    def check_psycopg2(self):
        return self.config["database_connection"].startswith("postgres")

[docs]    def check_mysql_python(self):
        return self.config["database_connection"].startswith("mysql")

[docs]    def check_drmaa(self):
        return ("galaxy.jobs.runners.drmaa:DRMAAJobRunner" in self.job_runners or
                "galaxy.jobs.runners.slurm:SlurmJobRunner" in self.job_runners)

[docs]    def check_pbs_python(self):
        return "galaxy.jobs.runners.pbs:PBSJobRunner" in self.job_runners

[docs]    def check_python_openid(self):
        return asbool(self.config["enable_openid"])

[docs]    def check_chronos_python(self):
        return "galaxy.jobs.runners.chronos:ChronosJobRunner" in self.job_runners

[docs]    def check_fluent_logger(self):
        return asbool(self.config["fluent_log"])

[docs]    def check_raven(self):
        return self.config.get("sentry_dsn", None) is not None

[docs]    def check_statsd(self):
        return self.config.get("statsd_host", None) is not None

[docs]    def check_graphite(self):
        return self.config.get("graphite_host", None) is not None

[docs]    def check_weberror(self):
        return (asbool(self.config["debug"]) and
                asbool(self.config["use_interactive"]))

[docs]    def check_pygments(self):
        # pygments is a dependency of weberror and only weberror
        return self.check_weberror()

[docs]    def check_python_ldap(self):
        return ('ldap' in self.authenticators or
                'activedirectory' in self.authenticators)

[docs]    def check_python_pam(self):
        return 'PAM' in self.authenticators

[docs]    def check_azure_storage(self):
        return 'azure_blob' in self.object_stores

[docs]    def check_cloudbridge(self):
        return 'cloud' in self.object_stores

[docs]    def check_kamaki(self):
        return 'pithos' in self.object_stores

[docs]    def check_watchdog(self):
        install_set = {'auto', 'True', 'true', 'polling'}
        return (self.config['watch_tools'] in install_set or
                self.config['watch_tool_data_dir'] in install_set)


[docs]def optional(config_file=None):
    if not config_file:
        config_file = find_config_file(['galaxy', 'universe_wsgi'])
    if not config_file:
        print("galaxy.dependencies.optional: no config file found", file=sys.stderr)
        return []
    rval = []
    conditional = ConditionalDependencies(config_file)
    for opt in conditional.conditional_reqs:
        if conditional.check(opt.key):
            rval.append(str(opt))
    return rval