We are currently solving the following issue within our repository. Here is the issue text:
--- BEGIN ISSUE ---
letsencrypt-apache on Gentoo should read /etc/conf.d/apache
In Gentoo, Define's are passed by the initscript as -D arguments read in /etc/conf.d/apache

LE seems to ignore that. As a result, since the "Listen 443" directive is inside IfDefine blocks, it is systematically overlooked by LE since it doesn't know about the active Define directives.

LE will therefore add a "Listen 443" temporary directive, which will cause apache to fail with a "could not bind to address 0.0.0.0:443" error. LE in turn will fail with "urn:acme:error:connection" since apache is not running during the challenge.


--- END ISSUE ---

Below are some code segments, each from a relevant file. One or more of these files may contain bugs.
--- BEGIN FILES ---
Path: `letsencrypt-apache/letsencrypt_apache/constants.py`
Content:
```
1 """Apache plugin constants."""
2 import pkg_resources
3 from letsencrypt import le_util
4 
5 
6 CLI_DEFAULTS_DEBIAN = dict(
7     server_root="/etc/apache2",
8     vhost_root="/etc/apache2/sites-available",
9     vhost_files="*",
10     version_cmd=['apache2ctl', '-v'],
11     define_cmd=['apache2ctl', '-t', '-D', 'DUMP_RUN_CFG'],
12     restart_cmd=['apache2ctl', 'graceful'],
13     conftest_cmd=['apache2ctl', 'configtest'],
14     enmod="a2enmod",
15     dismod="a2dismod",
16     le_vhost_ext="-le-ssl.conf",
17     handle_mods=True,
18     handle_sites=True,
19     challenge_location="/etc/apache2",
20     MOD_SSL_CONF_SRC=pkg_resources.resource_filename(
21     "letsencrypt_apache", "options-ssl-apache.conf")
22 )
23 CLI_DEFAULTS_CENTOS = dict(
24     server_root="/etc/httpd",
25     vhost_root="/etc/httpd/conf.d",
26     vhost_files="*.conf",
27     version_cmd=['apachectl', '-v'],
28     define_cmd=['apachectl', '-t', '-D', 'DUMP_RUN_CFG'],
29     restart_cmd=['apachectl', 'graceful'],
30     conftest_cmd=['apachectl', 'configtest'],
31     enmod=None,
32     dismod=None,
33     le_vhost_ext="-le-ssl.conf",
34     handle_mods=False,
35     handle_sites=False,
36     challenge_location="/etc/httpd/conf.d",
37     MOD_SSL_CONF_SRC=pkg_resources.resource_filename(
38     "letsencrypt_apache", "centos-options-ssl-apache.conf")
39 )
40 CLI_DEFAULTS_GENTOO = dict(
41     server_root="/etc/apache2",
42     vhost_root="/etc/apache2/vhosts.d",
43     vhost_files="*.conf",
44     version_cmd=['/usr/sbin/apache2', '-v'],
45     define_cmd=['/usr/sbin/apache2', '-t', '-D', 'DUMP_RUN_CFG'],
46     restart_cmd=['apache2ctl', 'graceful'],
47     conftest_cmd=['apache2ctl', 'configtest'],
48     enmod=None,
49     dismod=None,
50     le_vhost_ext="-le-ssl.conf",
51     handle_mods=False,
52     handle_sites=False,
53     challenge_location="/etc/apache2/vhosts.d",
54     MOD_SSL_CONF_SRC=pkg_resources.resource_filename(
55     "letsencrypt_apache", "options-ssl-apache.conf")
56 )
57 CLI_DEFAULTS_DARWIN = dict(
58     server_root="/etc/apache2",
59     vhost_root="/etc/apache2/other",
60     vhost_files="*.conf",
61     version_cmd=['/usr/sbin/httpd', '-v'],
62     define_cmd=['/usr/sbin/httpd', '-t', '-D', 'DUMP_RUN_CFG'],
63     restart_cmd=['apachectl', 'graceful'],
64     conftest_cmd=['apachectl', 'configtest'],
65     enmod=None,
66     dismod=None,
67     le_vhost_ext="-le-ssl.conf",
68     handle_mods=False,
69     handle_sites=False,
70     challenge_location="/etc/apache2/other",
71     MOD_SSL_CONF_SRC=pkg_resources.resource_filename(
72     "letsencrypt_apache", "options-ssl-apache.conf")
73 )
74 CLI_DEFAULTS = {
75     "debian": CLI_DEFAULTS_DEBIAN,
76     "ubuntu": CLI_DEFAULTS_DEBIAN,
77     "centos": CLI_DEFAULTS_CENTOS,
78     "centos linux": CLI_DEFAULTS_CENTOS,
79     "fedora": CLI_DEFAULTS_CENTOS,
80     "red hat enterprise linux server": CLI_DEFAULTS_CENTOS,
81     "gentoo base system": CLI_DEFAULTS_GENTOO,
82     "darwin": CLI_DEFAULTS_DARWIN,
83 }
84 """CLI defaults."""
85 
86 MOD_SSL_CONF_DEST = "options-ssl-apache.conf"
87 """Name of the mod_ssl config file as saved in `IConfig.config_dir`."""
88 
89 AUGEAS_LENS_DIR = pkg_resources.resource_filename(
90     "letsencrypt_apache", "augeas_lens")
91 """Path to the Augeas lens directory"""
92 
93 REWRITE_HTTPS_ARGS = [
94     "^", "https://%{SERVER_NAME}%{REQUEST_URI}", "[L,QSA,R=permanent]"]
95 """Apache version<2.3.9 rewrite rule arguments used for redirections to
96 https vhost"""
97 
98 REWRITE_HTTPS_ARGS_WITH_END = [
99     "^", "https://%{SERVER_NAME}%{REQUEST_URI}", "[END,QSA,R=permanent]"]
100 """Apache version >= 2.3.9 rewrite rule arguments used for redirections to
101     https vhost"""
102 
103 HSTS_ARGS = ["always", "set", "Strict-Transport-Security",
104              "\"max-age=31536000\""]
105 """Apache header arguments for HSTS"""
106 
107 UIR_ARGS = ["always", "set", "Content-Security-Policy",
108             "upgrade-insecure-requests"]
109 
110 HEADER_ARGS = {"Strict-Transport-Security": HSTS_ARGS,
111                "Upgrade-Insecure-Requests": UIR_ARGS}
112 
113 
114 def os_constant(key):
115     """Get a constant value for operating system
116     :param key: name of cli constant
117     :return: value of constant for active os
118     """
119     os_info = le_util.get_os_info()
120     try:
121         constants = CLI_DEFAULTS[os_info[0].lower()]
122     except KeyError:
123         constants = CLI_DEFAULTS["debian"]
124     return constants[key]
125
```
--- END FILES ---

Please first localize the bug based on the issue statement, and then generate a patch according to the `git diff` format fenced by three backticks.

Here is an example:

```diff
diff --git a/examples/server_async.py b/examples/server_async.py
--- a/examples/server_async.py
+++ b/examples/server_async.py
@@ -313,4 +313,4 @@
 
 
 if __name__ == "__main__":
-    asyncio.run(run_async_server("."), debug=True)
+    asyncio.run(run_async_server(), debug=True)
diff --git a/examples/server_sync.py b/examples/server_sync.py
--- a/examples/server_sync.py
+++ b/examples/server_sync.py
@@ -313,5 +313,5 @@
 
 
 if __name__ == "__main__":
-    server = run_sync_server(".")
+    server = run_sync_server()
     server.shutdown()

```

diff --git a/letsencrypt-apache/letsencrypt_apache/constants.py b/letsencrypt-apache/letsencrypt_apache/constants.py
--- a/letsencrypt-apache/letsencrypt_apache/constants.py
+++ b/letsencrypt-apache/letsencrypt_apache/constants.py
@@ -42,7 +42,7 @@
     vhost_root="/etc/apache2/vhosts.d",
     vhost_files="*.conf",
     version_cmd=['/usr/sbin/apache2', '-v'],
-    define_cmd=['/usr/sbin/apache2', '-t', '-D', 'DUMP_RUN_CFG'],
+    define_cmd=['apache2ctl', 'virtualhosts'],
     restart_cmd=['apache2ctl', 'graceful'],
     conftest_cmd=['apache2ctl', 'configtest'],
     enmod=None,

{"golden_diff": "diff --git a/letsencrypt-apache/letsencrypt_apache/constants.py b/letsencrypt-apache/letsencrypt_apache/constants.py\n--- a/letsencrypt-apache/letsencrypt_apache/constants.py\n+++ b/letsencrypt-apache/letsencrypt_apache/constants.py\n@@ -42,7 +42,7 @@\n     vhost_root=\"/etc/apache2/vhosts.d\",\n     vhost_files=\"*.conf\",\n     version_cmd=['/usr/sbin/apache2', '-v'],\n-    define_cmd=['/usr/sbin/apache2', '-t', '-D', 'DUMP_RUN_CFG'],\n+    define_cmd=['apache2ctl', 'virtualhosts'],\n     restart_cmd=['apache2ctl', 'graceful'],\n     conftest_cmd=['apache2ctl', 'configtest'],\n     enmod=None,\n", "issue": "letsencrypt-apache on Gentoo should read /etc/conf.d/apache\nIn Gentoo, Define's are passed by the initscript as -D arguments read in /etc/conf.d/apache\n\nLE seems to ignore that. As a result, since the \"Listen 443\" directive is inside IfDefine blocks, it is systematically overlooked by LE since it doesn't know about the active Define directives.\n\nLE will therefore add a \"Listen 443\" temporary directive, which will cause apache to fail with a \"could not bind to address 0.0.0.0:443\" error. LE in turn will fail with \"urn:acme:error:connection\" since apache is not running during the challenge.\n\n", "before_files": [{"content": "\"\"\"Apache plugin constants.\"\"\"\nimport pkg_resources\nfrom letsencrypt import le_util\n\n\nCLI_DEFAULTS_DEBIAN = dict(\n    server_root=\"/etc/apache2\",\n    vhost_root=\"/etc/apache2/sites-available\",\n    vhost_files=\"*\",\n    version_cmd=['apache2ctl', '-v'],\n    define_cmd=['apache2ctl', '-t', '-D', 'DUMP_RUN_CFG'],\n    restart_cmd=['apache2ctl', 'graceful'],\n    conftest_cmd=['apache2ctl', 'configtest'],\n    enmod=\"a2enmod\",\n    dismod=\"a2dismod\",\n    le_vhost_ext=\"-le-ssl.conf\",\n    handle_mods=True,\n    handle_sites=True,\n    challenge_location=\"/etc/apache2\",\n    MOD_SSL_CONF_SRC=pkg_resources.resource_filename(\n    \"letsencrypt_apache\", \"options-ssl-apache.conf\")\n)\nCLI_DEFAULTS_CENTOS = dict(\n    server_root=\"/etc/httpd\",\n    vhost_root=\"/etc/httpd/conf.d\",\n    vhost_files=\"*.conf\",\n    version_cmd=['apachectl', '-v'],\n    define_cmd=['apachectl', '-t', '-D', 'DUMP_RUN_CFG'],\n    restart_cmd=['apachectl', 'graceful'],\n    conftest_cmd=['apachectl', 'configtest'],\n    enmod=None,\n    dismod=None,\n    le_vhost_ext=\"-le-ssl.conf\",\n    handle_mods=False,\n    handle_sites=False,\n    challenge_location=\"/etc/httpd/conf.d\",\n    MOD_SSL_CONF_SRC=pkg_resources.resource_filename(\n    \"letsencrypt_apache\", \"centos-options-ssl-apache.conf\")\n)\nCLI_DEFAULTS_GENTOO = dict(\n    server_root=\"/etc/apache2\",\n    vhost_root=\"/etc/apache2/vhosts.d\",\n    vhost_files=\"*.conf\",\n    version_cmd=['/usr/sbin/apache2', '-v'],\n    define_cmd=['/usr/sbin/apache2', '-t', '-D', 'DUMP_RUN_CFG'],\n    restart_cmd=['apache2ctl', 'graceful'],\n    conftest_cmd=['apache2ctl', 'configtest'],\n    enmod=None,\n    dismod=None,\n    le_vhost_ext=\"-le-ssl.conf\",\n    handle_mods=False,\n    handle_sites=False,\n    challenge_location=\"/etc/apache2/vhosts.d\",\n    MOD_SSL_CONF_SRC=pkg_resources.resource_filename(\n    \"letsencrypt_apache\", \"options-ssl-apache.conf\")\n)\nCLI_DEFAULTS_DARWIN = dict(\n    server_root=\"/etc/apache2\",\n    vhost_root=\"/etc/apache2/other\",\n    vhost_files=\"*.conf\",\n    version_cmd=['/usr/sbin/httpd', '-v'],\n    define_cmd=['/usr/sbin/httpd', '-t', '-D', 'DUMP_RUN_CFG'],\n    restart_cmd=['apachectl', 'graceful'],\n    conftest_cmd=['apachectl', 'configtest'],\n    enmod=None,\n    dismod=None,\n    le_vhost_ext=\"-le-ssl.conf\",\n    handle_mods=False,\n    handle_sites=False,\n    challenge_location=\"/etc/apache2/other\",\n    MOD_SSL_CONF_SRC=pkg_resources.resource_filename(\n    \"letsencrypt_apache\", \"options-ssl-apache.conf\")\n)\nCLI_DEFAULTS = {\n    \"debian\": CLI_DEFAULTS_DEBIAN,\n    \"ubuntu\": CLI_DEFAULTS_DEBIAN,\n    \"centos\": CLI_DEFAULTS_CENTOS,\n    \"centos linux\": CLI_DEFAULTS_CENTOS,\n    \"fedora\": CLI_DEFAULTS_CENTOS,\n    \"red hat enterprise linux server\": CLI_DEFAULTS_CENTOS,\n    \"gentoo base system\": CLI_DEFAULTS_GENTOO,\n    \"darwin\": CLI_DEFAULTS_DARWIN,\n}\n\"\"\"CLI defaults.\"\"\"\n\nMOD_SSL_CONF_DEST = \"options-ssl-apache.conf\"\n\"\"\"Name of the mod_ssl config file as saved in `IConfig.config_dir`.\"\"\"\n\nAUGEAS_LENS_DIR = pkg_resources.resource_filename(\n    \"letsencrypt_apache\", \"augeas_lens\")\n\"\"\"Path to the Augeas lens directory\"\"\"\n\nREWRITE_HTTPS_ARGS = [\n    \"^\", \"https://%{SERVER_NAME}%{REQUEST_URI}\", \"[L,QSA,R=permanent]\"]\n\"\"\"Apache version<2.3.9 rewrite rule arguments used for redirections to\nhttps vhost\"\"\"\n\nREWRITE_HTTPS_ARGS_WITH_END = [\n    \"^\", \"https://%{SERVER_NAME}%{REQUEST_URI}\", \"[END,QSA,R=permanent]\"]\n\"\"\"Apache version >= 2.3.9 rewrite rule arguments used for redirections to\n    https vhost\"\"\"\n\nHSTS_ARGS = [\"always\", \"set\", \"Strict-Transport-Security\",\n             \"\\\"max-age=31536000\\\"\"]\n\"\"\"Apache header arguments for HSTS\"\"\"\n\nUIR_ARGS = [\"always\", \"set\", \"Content-Security-Policy\",\n            \"upgrade-insecure-requests\"]\n\nHEADER_ARGS = {\"Strict-Transport-Security\": HSTS_ARGS,\n               \"Upgrade-Insecure-Requests\": UIR_ARGS}\n\n\ndef os_constant(key):\n    \"\"\"Get a constant value for operating system\n    :param key: name of cli constant\n    :return: value of constant for active os\n    \"\"\"\n    os_info = le_util.get_os_info()\n    try:\n        constants = CLI_DEFAULTS[os_info[0].lower()]\n    except KeyError:\n        constants = CLI_DEFAULTS[\"debian\"]\n    return constants[key]\n", "path": "letsencrypt-apache/letsencrypt_apache/constants.py"}], "after_files": [{"content": "\"\"\"Apache plugin constants.\"\"\"\nimport pkg_resources\nfrom letsencrypt import le_util\n\n\nCLI_DEFAULTS_DEBIAN = dict(\n    server_root=\"/etc/apache2\",\n    vhost_root=\"/etc/apache2/sites-available\",\n    vhost_files=\"*\",\n    version_cmd=['apache2ctl', '-v'],\n    define_cmd=['apache2ctl', '-t', '-D', 'DUMP_RUN_CFG'],\n    restart_cmd=['apache2ctl', 'graceful'],\n    conftest_cmd=['apache2ctl', 'configtest'],\n    enmod=\"a2enmod\",\n    dismod=\"a2dismod\",\n    le_vhost_ext=\"-le-ssl.conf\",\n    handle_mods=True,\n    handle_sites=True,\n    challenge_location=\"/etc/apache2\",\n    MOD_SSL_CONF_SRC=pkg_resources.resource_filename(\n    \"letsencrypt_apache\", \"options-ssl-apache.conf\")\n)\nCLI_DEFAULTS_CENTOS = dict(\n    server_root=\"/etc/httpd\",\n    vhost_root=\"/etc/httpd/conf.d\",\n    vhost_files=\"*.conf\",\n    version_cmd=['apachectl', '-v'],\n    define_cmd=['apachectl', '-t', '-D', 'DUMP_RUN_CFG'],\n    restart_cmd=['apachectl', 'graceful'],\n    conftest_cmd=['apachectl', 'configtest'],\n    enmod=None,\n    dismod=None,\n    le_vhost_ext=\"-le-ssl.conf\",\n    handle_mods=False,\n    handle_sites=False,\n    challenge_location=\"/etc/httpd/conf.d\",\n    MOD_SSL_CONF_SRC=pkg_resources.resource_filename(\n    \"letsencrypt_apache\", \"centos-options-ssl-apache.conf\")\n)\nCLI_DEFAULTS_GENTOO = dict(\n    server_root=\"/etc/apache2\",\n    vhost_root=\"/etc/apache2/vhosts.d\",\n    vhost_files=\"*.conf\",\n    version_cmd=['/usr/sbin/apache2', '-v'],\n    define_cmd=['apache2ctl', 'virtualhosts'],\n    restart_cmd=['apache2ctl', 'graceful'],\n    conftest_cmd=['apache2ctl', 'configtest'],\n    enmod=None,\n    dismod=None,\n    le_vhost_ext=\"-le-ssl.conf\",\n    handle_mods=False,\n    handle_sites=False,\n    challenge_location=\"/etc/apache2/vhosts.d\",\n    MOD_SSL_CONF_SRC=pkg_resources.resource_filename(\n    \"letsencrypt_apache\", \"options-ssl-apache.conf\")\n)\nCLI_DEFAULTS_DARWIN = dict(\n    server_root=\"/etc/apache2\",\n    vhost_root=\"/etc/apache2/other\",\n    vhost_files=\"*.conf\",\n    version_cmd=['/usr/sbin/httpd', '-v'],\n    define_cmd=['/usr/sbin/httpd', '-t', '-D', 'DUMP_RUN_CFG'],\n    restart_cmd=['apachectl', 'graceful'],\n    conftest_cmd=['apachectl', 'configtest'],\n    enmod=None,\n    dismod=None,\n    le_vhost_ext=\"-le-ssl.conf\",\n    handle_mods=False,\n    handle_sites=False,\n    challenge_location=\"/etc/apache2/other\",\n    MOD_SSL_CONF_SRC=pkg_resources.resource_filename(\n    \"letsencrypt_apache\", \"options-ssl-apache.conf\")\n)\nCLI_DEFAULTS = {\n    \"debian\": CLI_DEFAULTS_DEBIAN,\n    \"ubuntu\": CLI_DEFAULTS_DEBIAN,\n    \"centos\": CLI_DEFAULTS_CENTOS,\n    \"centos linux\": CLI_DEFAULTS_CENTOS,\n    \"fedora\": CLI_DEFAULTS_CENTOS,\n    \"red hat enterprise linux server\": CLI_DEFAULTS_CENTOS,\n    \"gentoo base system\": CLI_DEFAULTS_GENTOO,\n    \"darwin\": CLI_DEFAULTS_DARWIN,\n}\n\"\"\"CLI defaults.\"\"\"\n\nMOD_SSL_CONF_DEST = \"options-ssl-apache.conf\"\n\"\"\"Name of the mod_ssl config file as saved in `IConfig.config_dir`.\"\"\"\n\nAUGEAS_LENS_DIR = pkg_resources.resource_filename(\n    \"letsencrypt_apache\", \"augeas_lens\")\n\"\"\"Path to the Augeas lens directory\"\"\"\n\nREWRITE_HTTPS_ARGS = [\n    \"^\", \"https://%{SERVER_NAME}%{REQUEST_URI}\", \"[L,QSA,R=permanent]\"]\n\"\"\"Apache version<2.3.9 rewrite rule arguments used for redirections to\nhttps vhost\"\"\"\n\nREWRITE_HTTPS_ARGS_WITH_END = [\n    \"^\", \"https://%{SERVER_NAME}%{REQUEST_URI}\", \"[END,QSA,R=permanent]\"]\n\"\"\"Apache version >= 2.3.9 rewrite rule arguments used for redirections to\n    https vhost\"\"\"\n\nHSTS_ARGS = [\"always\", \"set\", \"Strict-Transport-Security\",\n             \"\\\"max-age=31536000\\\"\"]\n\"\"\"Apache header arguments for HSTS\"\"\"\n\nUIR_ARGS = [\"always\", \"set\", \"Content-Security-Policy\",\n            \"upgrade-insecure-requests\"]\n\nHEADER_ARGS = {\"Strict-Transport-Security\": HSTS_ARGS,\n               \"Upgrade-Insecure-Requests\": UIR_ARGS}\n\n\ndef os_constant(key):\n    \"\"\"Get a constant value for operating system\n    :param key: name of cli constant\n    :return: value of constant for active os\n    \"\"\"\n    os_info = le_util.get_os_info()\n    try:\n        constants = CLI_DEFAULTS[os_info[0].lower()]\n    except KeyError:\n        constants = CLI_DEFAULTS[\"debian\"]\n    return constants[key]\n", "path": "letsencrypt-apache/letsencrypt_apache/constants.py"}]}