Download and install MongoDB if not already available

.github/workflows/main.yml

@@ -71,6 +71,12 @@ jobs:
       - name: Install tox
         run: |
           python -m pip install tox
+      # needed to run mongodb
+      # https://www.mongodb.com/docs/manual/tutorial/install-mongodb-on-ubuntu-tarball/
+      - uses: awalsh128/cache-apt-pkgs-action@latest
+        if: ${{ matrix.platform == 'ubuntu-latest' }}
+        with:
+          packages: libcurl4 libgssapi-krb5-2 libldap-2.5-0 libwrap0 libsasl2-2 libsasl2-modules libsasl2-modules-gssapi-mit snmp openssl liblzma5
       - name: Run
         run: tox
 

jaraco/mongodb/fixtures.py

@@ -43,11 +43,13 @@ def _ephemeral_instance(config):
     params = shlex.split(params_raw)
     try:
         instance = service.MongoDBInstance()
-        instance.merge_mongod_args(params)
-        instance.start()
-        pymongo.MongoClient(instance.get_connect_hosts())
-        yield instance
+        with instance.ensure():
+            instance.merge_mongod_args(params)
+            instance.start()
+            pymongo.MongoClient(instance.get_connect_hosts())
+            yield instance
     except Exception as err:
+        raise
         pytest.skip(f"MongoDB not available ({err})")
     instance.stop()
 

jaraco/mongodb/install.py

@@ -0,0 +1,89 @@
+import json
+import pathlib
+import platform
+import re
+import tarfile
+import urllib.request
+import posixpath
+import zipfile
+import io
+
+import autocommand
+from more_itertools import one
+
+
+def get_download_url():
+    source = 'https://www.mongodb.com/try/download/community'
+    with urllib.request.urlopen(source) as resp:
+        html = resp.read().decode('utf-8')
+    server_data = re.search(
+        r'<script id="server-data">\s*window\.__serverData=(.*?)\s*</script>',
+        html,
+        flags=re.DOTALL | re.MULTILINE,
+    ).group(1)
+    data = json.loads(server_data)
+    versions = data['components'][2]['props']['embeddedComponents'][0]['props'][
+        'items'
+    ][2]['embeddedComponents'][0]['props']['data'][0]['data'][0]
+    best_version = next(ver for ver in versions if versions[ver]['meta']['current'])
+    platforms = versions[best_version]['platforms']
+    lookup = {
+        ('Darwin', 'arm64'): 'macOS ARM 64',
+        ('Darwin', 'x86_64'): 'macOS x64',
+        ('Linux', 'x86_64'): 'Ubuntu 22.04 x64',
+        ('Linux', 'aarch64'): 'Ubuntu 22.04 ARM 64',
+        ('Windows', 'x86_64'): 'Windows x64',
+        ('Windows', 'ARM64'): 'Windows x64',
+    }
+    plat_name = lookup[(platform.system(), platform.machine())]
+    format = 'zip' if 'Windows' in plat_name else 'tgz'
+    return platforms[plat_name][format]
+
+
+class RootFinder(set):
+    def __call__(self, info, path):
+        self.add(self.root(info.name))
+        return info
+
+    @staticmethod
+    def root(name):
+        root, _, _ = name.partition(posixpath.sep)
+        return root
+
+    @classmethod
+    def from_names(cls, names):
+        return cls(map(cls.root, names))
+
+
+def _extract_all(resp, target):
+    desig = resp.headers['Content-Type'].lower().replace('/', '_').replace('+', '_')
+    func_name = f'_extract_{desig}'
+    return globals()[func_name](resp, target)
+
+
+def _extract_application_zip(resp, target):
+    data = io.BytesIO(resp.read())
+    with zipfile.ZipFile(data) as obj:
+        roots = RootFinder.from_names(obj.namelist())
+        obj.extractall(
+            target,
+        )
+    return roots
+
+
+def _extract_application_gzip(resp, target):
+    with tarfile.open(fileobj=resp, mode='r|*') as obj:
+        roots = RootFinder()
+        # python/typeshed#10514
+        obj.extractall(target, filter=roots)  # type: ignore
+    return roots
+
+
+def install(target: pathlib.Path = pathlib.Path()):
+    url = get_download_url()
+    with urllib.request.urlopen(url) as resp:
+        roots = _extract_all(resp, target.expanduser())
+    return target.joinpath(one(roots))
+
+
+autocommand.autocommand(__name__)(install)

jaraco/mongodb/service.py

@@ -9,6 +9,8 @@
 import functools
 import logging
 import datetime
+import pathlib
+import contextlib
 
 from typing import Dict, Any
 
@@ -18,6 +20,7 @@
 from tempora import timing
 from . import manage
 from . import cli
+from . import install
 
 
 log = logging.getLogger(__name__)
@@ -55,6 +58,19 @@ class MongoDBFinder(paths.PathFinder):
     def find_binary(cls):
         return os.path.join(cls.find_root(), cls.exe)
 
+    @classmethod
+    @contextlib.contextmanager
+    def ensure(cls):
+        try:
+            yield cls.find_root()
+        except RuntimeError:
+            with tempfile.TemporaryDirectory() as tmp_dir:
+                tmp = pathlib.Path(tmp_dir)
+                root = install.install(target=tmp).joinpath('bin')
+                cls.candidate_paths.append(root)
+                yield root
+            cls.candidate_paths.remove(root)
+
 
 class MongoDBService(MongoDBFinder, services.Subprocess, services.Service):
     port = 27017

setup.cfg

@@ -33,6 +33,7 @@ install_requires =
 	pytimeparse
 	jaraco.collections>=2
 	importlib_metadata; python_version < "3.8"
+	autocommand
 
 [options.packages.find]
 exclude =