How to use conda - 10 common examples

subname = test_url.replace(join_url(location, name), '', 1).strip('/')
            channel_name = join_url(name, subname)
            channel = _get_channel_for_name(channel_name)
            return channel.location, channel_name, channel.scheme, channel.auth, channel.token

    # Step 3. migrated_channel_aliases matches
    for migrated_alias in context.migrated_channel_aliases:
        if test_url.startswith(migrated_alias.location):
            name = test_url.replace(migrated_alias.location, '', 1).strip('/')
            ca = context.channel_alias
            return ca.location, name, ca.scheme, ca.auth, ca.token

    # Step 4. custom_channels matches
    for name, channel in sorted(context.custom_channels.items(), reverse=True,
                                key=lambda x: len(x[0])):
        that_test_url = join_url(channel.location, channel.name)
        if tokenized_startswith(test_url.split('/'), that_test_url.split('/')):
            subname = test_url.replace(that_test_url, '', 1).strip('/')
            return (channel.location, join_url(channel.name, subname), scheme,
                    channel.auth, channel.token)

    # Step 5. channel_alias match
    ca = context.channel_alias
    if ca.location and tokenized_startswith(test_url.split('/'), ca.location.split('/')):
        name = test_url.replace(ca.location, '', 1).strip('/') or None
        return ca.location, name, scheme, ca.auth, ca.token

    # Step 6. not-otherwise-specified file://-type urls
    if host is None:
        # this should probably only happen with a file:// type url
        assert port is None
        location, name = test_url.rsplit('/', 1)

return channel.location, channel_name, channel.scheme, channel.auth, channel.token

    # Step 3. migrated_channel_aliases matches
    for migrated_alias in context.migrated_channel_aliases:
        if test_url.startswith(migrated_alias.location):
            name = test_url.replace(migrated_alias.location, '', 1).strip('/')
            ca = context.channel_alias
            return ca.location, name, ca.scheme, ca.auth, ca.token

    # Step 4. custom_channels matches
    for name, channel in sorted(context.custom_channels.items(), reverse=True,
                                key=lambda x: len(x[0])):
        that_test_url = join_url(channel.location, channel.name)
        if tokenized_startswith(test_url.split('/'), that_test_url.split('/')):
            subname = test_url.replace(that_test_url, '', 1).strip('/')
            return (channel.location, join_url(channel.name, subname), scheme,
                    channel.auth, channel.token)

    # Step 5. channel_alias match
    ca = context.channel_alias
    if ca.location and tokenized_startswith(test_url.split('/'), ca.location.split('/')):
        name = test_url.replace(ca.location, '', 1).strip('/') or None
        return ca.location, name, scheme, ca.auth, ca.token

    # Step 6. not-otherwise-specified file://-type urls
    if host is None:
        # this should probably only happen with a file:// type url
        assert port is None
        location, name = test_url.rsplit('/', 1)
        if not location:
            location = '/'
        _scheme, _auth, _token = 'file', None, None

https://anaconda-repo.dev/packages/conda-forge/linux-64/repodata.json, add an
            entry 'conda-forge: https://anaconda-repo.dev/packages'.
            """),
        'custom_multichannels': dals("""
            A multichannel is a metachannel composed of multiple channels. The two reserved
            multichannels are 'defaults' and 'local'. The 'defaults' multichannel is
            customized using the 'default_channels' parameter. The 'local'
            multichannel is a list of file:// channel locations where conda-build stashes
            successfully-built packages.  Other multichannels can be defined with
            custom_multichannels, where the key is the multichannel name and the value is
            a list of channel names and/or channel urls.
            """),
        'default_channels': dals("""
            The list of channel names and/or urls used for the 'defaults' multichannel.
            """),
        'disallow': dals("""
            Package specifications to disallow installing. The default is to allow
            all packages.
            """),
        'envs_dirs': dals("""
            The list of directories to search for named environments. When creating a new
            named environment, the environment will be placed in the first writable
            location.
            """),
        'force': dals("""
            Override any of conda's objections and safeguards for installing packages and
            potentially breaking environments. Also re-installs the package, even if the
            package is already installed. Implies --no-deps.
            """),
        'json': dals("""
            Ensure all output written to stdout is structured json.
            """),

with open(target_path) as fh:
                created_file_contents = fh.read()

            first_line, second_line, third_line, remainder = created_file_contents.split('\n', 3)
            if on_win:
                win_conda_exe = join(conda_prefix, 'Scripts', 'conda.exe')
                assert first_line == 'set -gx CONDA_EXE (cygpath "%s")' % win_conda_exe
                assert second_line == 'set _CONDA_ROOT (cygpath "%s")' % conda_prefix
                assert third_line == 'set _CONDA_EXE (cygpath "%s")' % win_conda_exe
            else:
                assert first_line == 'set -gx CONDA_EXE "%s"' % join(conda_prefix, 'bin', 'conda')
                assert second_line == 'set _CONDA_ROOT "%s"' % conda_prefix
                assert third_line == 'set _CONDA_EXE "%s"' % join(conda_prefix, 'bin', 'conda')

            with open(join(CONDA_PACKAGE_ROOT, 'shell', 'etc', 'fish', 'conf.d', 'conda.fish')) as fh:
                original_contents = fh.read()
            assert remainder == original_contents

            result = install_conda_fish(target_path, conda_prefix)
            assert result == Result.NO_CHANGE

def test_install_conda_fish(self):
        with tempdir() as conda_temp_prefix:
            conda_prefix = abspath(sys.prefix)
            target_path = join(conda_temp_prefix, 'etc', 'fish', 'conf.d', 'conda.fish')
            result = install_conda_fish(target_path, conda_prefix)
            assert result == Result.MODIFIED

            with open(target_path) as fh:
                created_file_contents = fh.read()

            first_line, second_line, third_line, remainder = created_file_contents.split('\n', 3)
            if on_win:
                win_conda_exe = join(conda_prefix, 'Scripts', 'conda.exe')
                assert first_line == 'set -gx CONDA_EXE (cygpath "%s")' % win_conda_exe
                assert second_line == 'set _CONDA_ROOT (cygpath "%s")' % conda_prefix
                assert third_line == 'set _CONDA_EXE (cygpath "%s")' % win_conda_exe
            else:
                assert first_line == 'set -gx CONDA_EXE "%s"' % join(conda_prefix, 'bin', 'conda')
                assert second_line == 'set _CONDA_ROOT "%s"' % conda_prefix
                assert third_line == 'set _CONDA_EXE "%s"' % join(conda_prefix, 'bin', 'conda')

            with open(join(CONDA_PACKAGE_ROOT, 'shell', 'etc', 'fish', 'conf.d', 'conda.fish')) as fh:
                original_contents = fh.read()
            assert remainder == original_contents

'perl-encode',
        'perl-exporter',
        'perl-getopt-long',
        'perl-lib',
        'perl-pod-usage',
        'perl-time-hires',

        'perl-pod-escapes',
        'perl-extutils-makemaker',
        'perl-test',
        'perl-parent',
        'perl-data-dumper',
        'perl-test-harness',

    )
    all_package_names = set(info['name'] for info in itervalues(keep))
    for fn, info in r6json['packages'].items():
        if info['name'] in keep_list:
            _keep[fn] = info
            for dep in info['depends']:
                dep = dep.split()[0]
                if dep not in keep_list and dep not in all_package_names:
                    missing_in_whitelist.add(dep)
    if missing_in_whitelist:
        print(">>> missing 6 <<<")
        pprint(missing_in_whitelist)

    # patch 'perl-*' to include an explicit dependency on perl, as from the 'perl-threaded' package
    perl_info_dicts = tuple(info for info in _keep.values() if info['name'].startswith('perl-'))
    for info in perl_info_dicts:
        if not any(dep.startswith("perl ") for dep in info['depends']):
            info['depends'].append('perl 5.22.0*')

def get_index_r_1(subdir=context.subdir):
    with open(join(dirname(__file__), 'data', 'index.json')) as fi:
        packages = json.load(fi)
        repodata = {
            "info": {
                "subdir": subdir,
                "arch": context.arch_name,
                "platform": context.platform,
            },
            "packages": packages,
        }

    channel = Channel('https://conda.anaconda.org/channel-1/%s' % subdir)
    sd = SubdirData(channel)
    with env_var("CONDA_ADD_PIP_AS_PYTHON_DEPENDENCY", "false", stack_callback=conda_tests_ctxt_mgmt_def_pol):
        sd._process_raw_repodata_str(json.dumps(repodata))
    sd._loaded = True

def test_package_info(self):
        index_json_record = IndexRecord(build=0, build_number=0, name="test_foo", version=0,
                                        channel='defaults', subdir=context.subdir, fn='doesnt-matter',
                                        md5='0123456789')
        icondata = "icondata"
        package_metadata = PackageMetadata(
            package_metadata_version=1,
            noarch=Noarch(type="python", entry_points=["test:foo"]),
        )

        paths = [PathData(_path="test/path/1", file_mode=FileMode.text, path_type=PathType.hardlink,
                          prefix_placeholder="/opt/anaconda1anaconda2anaconda3", ),
                 PathData(_path="test/path/2", no_link=True, path_type=PathType.hardlink),
                 PathData(_path="test/path/3", path_type=PathType.softlink),
                 PathData(_path="menu/test.json", path_type=PathType.hardlink)]
        paths_data = PathsData(paths_version=0, paths=paths)

        package_info = PackageInfo(
            extracted_package_dir='/some/path',

def test_strictness(self):
        assert MatchSpec('foo').strictness == 1
        assert MatchSpec('foo 1.2').strictness == 2
        assert MatchSpec('foo 1.2 3').strictness == 3
        assert MatchSpec('foo 1.2 3 [channel=burg]').strictness == 3
        # Seems odd, but this is needed for compatibility
        assert MatchSpec('test* 1.2').strictness == 3
        assert MatchSpec('foo', build_number=2).strictness == 3

a = MatchSpec(dst)
        b = MatchSpec(a)
        c = MatchSpec(dst, optional=True, target='burg')
        d = MatchSpec(a, build='5')

        assert a == b
        assert hash(a) == hash(b)
        assert a is b

        assert a != c
        assert hash(a) != hash(c)

        assert a != d
        assert hash(a) != hash(d)

        p = MatchSpec(channel='defaults',name='python',version=VersionSpec('3.5*'))
        assert p.match(Dist(channel='defaults', dist_name='python-3.5.3-1', name='python',
                            version='3.5.3', build_string='1', build_number=1, base_url=None,
                            platform=None))

        assert not p.match(Dist(channel='defaults', dist_name='python-3.6.0-0', name='python',
                                version='3.6.0', build_string='0', build_number=0, base_url=None,
                                platform=None))

        assert p.match(Dist(channel='defaults', dist_name='python-3.5.1-0', name='python',
                            version='3.5.1', build_string='0', build_number=0, base_url=None,
                            platform=None))
        assert p.match(PackageRecord(name='python', version='3.5.1', build='0', build_number=0,
                                     depends=('openssl 1.0.2*', 'readline 6.2*', 'sqlite',
                                               'tk 8.5*', 'xz 5.0.5', 'zlib 1.2*', 'pip'),
                                     channel=Channel(scheme='https', auth=None,
                                                      location='repo.anaconda.com', token=None,