Try JUJU_CHARM_*_PROXY settings when fetching jenkins deb

lib/charms/layer/jenkins/packages.py

@@ -20,6 +20,16 @@
 APT_SOURCE = "deb http://pkg.jenkins-ci.org/%s binary/"
 
 
+def _juju_proxy_env():
+    proxy_env = {}
+    for protocol in ['FTP', 'HTTP', 'HTTPS', 'NO']:
+        envvar = '%s_PROXY' % (protocol)
+        juju_envvar = 'JUJU_CHARM_%s' % (envvar)
+        if juju_envvar in os.environ:
+            proxy_env[envvar.lower()] = os.environ[juju_envvar]
+    return proxy_env
+
+
 class Packages(object):
     """Manage Jenkins package dependencies."""
 
@@ -85,7 +95,15 @@ def _install_from_remote_deb(self, url):
         hookenv.log("Getting remote jenkins package: %s" % url)
         tempdir = tempfile.mkdtemp()
         target = os.path.join(tempdir, 'jenkins.deb')
-        subprocess.check_call(("wget", "-q", "-O", target, url))
+
+        proxy_env = _juju_proxy_env()
+        try:
+            subprocess.check_call(("wget", "-q", "-O", target, url),
+                                  env={**os.environ, **proxy_env})
+        except subprocess.CalledProcessError: # pragma: no cover
+            if len(proxy_env) == 0:
+                raise
+            subprocess.check_call(("wget", "-q", "-O", target, url))
         self._install_local_deb(target)
         shutil.rmtree(tempdir)
 

unit_tests/test_packages.py

@@ -112,6 +112,18 @@ def test_install_jenkins_remote(self):
         finally:
             hookenv.config()["release"] = orig_release
 
+    def test_install_jenkins_remote_with_proxy(self):
+        """
+        If the 'release' config is set to a remote URL, then Jenkins will be
+        installed from the deb files pointed by that url.
+        """
+        env_backup = os.environ.copy()
+        try:
+            os.environ['JUJU_CHARM_HTTP_PROXY'] = "http://pr.oxy:1234"
+            self.test_install_jenkins_remote()
+        finally:
+            os.environ = env_backup
+
     def test_install_jenkins_lts_release(self):
         """
         If the 'release' config is set to 'lts', an APT source entry will be