forked from MirrorHub/synapse
Allow using several custom template directories (#10587)
Allow using several directories in read_templates.
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7 changed files with 97 additions and 26 deletions
1
changelog.d/10587.misc
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1
changelog.d/10587.misc
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Allow multiple custom directories in `read_templates`.
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@ -237,13 +237,14 @@ class Config:
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def read_templates(
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self,
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filenames: List[str],
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custom_template_directory: Optional[str] = None,
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custom_template_directories: Optional[Iterable[str]] = None,
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) -> List[jinja2.Template]:
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"""Load a list of template files from disk using the given variables.
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This function will attempt to load the given templates from the default Synapse
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template directory. If `custom_template_directory` is supplied, that directory
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is tried first.
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template directory. If `custom_template_directories` is supplied, any directory
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in this list is tried (in the order they appear in the list) before trying
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Synapse's default directory.
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Files read are treated as Jinja templates. The templates are not rendered yet
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and have autoescape enabled.
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@ -251,8 +252,8 @@ class Config:
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Args:
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filenames: A list of template filenames to read.
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custom_template_directory: A directory to try to look for the templates
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before using the default Synapse template directory instead.
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custom_template_directories: A list of directory to try to look for the
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templates before using the default Synapse template directory instead.
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Raises:
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ConfigError: if the file's path is incorrect or otherwise cannot be read.
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@ -260,20 +261,26 @@ class Config:
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Returns:
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A list of jinja2 templates.
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"""
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search_directories = [self.default_template_dir]
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search_directories = []
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# The loader will first look in the custom template directory (if specified) for the
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# given filename. If it doesn't find it, it will use the default template dir instead
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if custom_template_directory:
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# Check that the given template directory exists
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if not self.path_exists(custom_template_directory):
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raise ConfigError(
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"Configured template directory does not exist: %s"
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% (custom_template_directory,)
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)
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# The loader will first look in the custom template directories (if specified)
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# for the given filename. If it doesn't find it, it will use the default
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# template dir instead.
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if custom_template_directories is not None:
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for custom_template_directory in custom_template_directories:
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# Check that the given template directory exists
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if not self.path_exists(custom_template_directory):
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raise ConfigError(
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"Configured template directory does not exist: %s"
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% (custom_template_directory,)
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)
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# Search the custom template directory as well
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search_directories.insert(0, custom_template_directory)
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# Search the custom template directory as well
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search_directories.append(custom_template_directory)
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# Append the default directory at the end of the list so Jinja can fallback on it
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# if a template is missing from any custom directory.
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search_directories.append(self.default_template_dir)
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# TODO: switch to synapse.util.templates.build_jinja_env
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loader = jinja2.FileSystemLoader(search_directories)
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@ -88,5 +88,5 @@ class AccountValidityConfig(Config):
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"account_previously_renewed.html",
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invalid_token_template_filename,
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],
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account_validity_template_dir,
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(td for td in (account_validity_template_dir,) if td),
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)
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@ -257,7 +257,9 @@ class EmailConfig(Config):
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registration_template_success_html,
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add_threepid_template_success_html,
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],
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template_dir,
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(
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td for td in (template_dir,) if td
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), # Filter out template_dir if not provided
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)
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# Render templates that do not contain any placeholders
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@ -297,7 +299,7 @@ class EmailConfig(Config):
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self.email_notif_template_text,
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) = self.read_templates(
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[notif_template_html, notif_template_text],
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template_dir,
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(td for td in (template_dir,) if td),
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)
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self.email_notif_for_new_users = email_config.get(
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@ -320,7 +322,7 @@ class EmailConfig(Config):
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self.account_validity_template_text,
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) = self.read_templates(
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[expiry_template_html, expiry_template_text],
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template_dir,
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(td for td in (template_dir,) if td),
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)
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subjects_config = email_config.get("subjects", {})
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@ -63,7 +63,7 @@ class SSOConfig(Config):
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"sso_auth_success.html",
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"sso_auth_bad_user.html",
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],
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self.sso_template_dir,
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(td for td in (self.sso_template_dir,) if td),
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)
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# These templates have no placeholders, so render them here
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@ -677,7 +677,10 @@ class ModuleApi:
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A list containing the loaded templates, with the orders matching the one of
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the filenames parameter.
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"""
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return self._hs.config.read_templates(filenames, custom_template_directory)
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return self._hs.config.read_templates(
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filenames,
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(td for td in (custom_template_directory,) if td),
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)
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class PublicRoomListManager:
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@ -30,7 +30,7 @@ class BaseConfigTestCase(unittest.HomeserverTestCase):
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# contain template files
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with tempfile.TemporaryDirectory() as tmp_dir:
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# Attempt to load an HTML template from our custom template directory
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template = self.hs.config.read_templates(["sso_error.html"], tmp_dir)[0]
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template = self.hs.config.read_templates(["sso_error.html"], (tmp_dir,))[0]
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# If no errors, we should've gotten the default template instead
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@ -60,7 +60,7 @@ class BaseConfigTestCase(unittest.HomeserverTestCase):
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# Attempt to load the template from our custom template directory
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template = (
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self.hs.config.read_templates([template_filename], tmp_dir)
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self.hs.config.read_templates([template_filename], (tmp_dir,))
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)[0]
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# Render the template
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@ -74,8 +74,66 @@ class BaseConfigTestCase(unittest.HomeserverTestCase):
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"Template file did not contain our test string",
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)
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def test_multiple_custom_template_directories(self):
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"""Tests that directories are searched in the right order if multiple custom
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template directories are provided.
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"""
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# Create two temporary directories on the filesystem.
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tempdirs = [
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tempfile.TemporaryDirectory(),
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tempfile.TemporaryDirectory(),
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]
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# Create one template in each directory, whose content is the index of the
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# directory in the list.
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template_filename = "my_template.html.j2"
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for i in range(len(tempdirs)):
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tempdir = tempdirs[i]
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template_path = os.path.join(tempdir.name, template_filename)
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with open(template_path, "w") as fp:
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fp.write(str(i))
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fp.flush()
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# Retrieve the template.
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template = (
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self.hs.config.read_templates(
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[template_filename],
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(td.name for td in tempdirs),
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)
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)[0]
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# Test that we got the template we dropped in the first directory in the list.
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self.assertEqual(template.render(), "0")
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# Add another template, this one only in the second directory in the list, so we
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# can test that the second directory is still searched into when no matching file
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# could be found in the first one.
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other_template_name = "my_other_template.html.j2"
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other_template_path = os.path.join(tempdirs[1].name, other_template_name)
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with open(other_template_path, "w") as fp:
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fp.write("hello world")
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fp.flush()
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# Retrieve the template.
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template = (
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self.hs.config.read_templates(
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[other_template_name],
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(td.name for td in tempdirs),
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)
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)[0]
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# Test that the file has the expected content.
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self.assertEqual(template.render(), "hello world")
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# Cleanup the temporary directories manually since we're not using a context
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# manager.
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for td in tempdirs:
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td.cleanup()
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def test_loading_template_from_nonexistent_custom_directory(self):
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with self.assertRaises(ConfigError):
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self.hs.config.read_templates(
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["some_filename.html"], "a_nonexistent_directory"
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["some_filename.html"], ("a_nonexistent_directory",)
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)
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