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config: allow reading both the defaults file and the modified config

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In the process, rename config.proto to config.defaults (because that is
what it is now).

Also use dict.get('key', default_value) when querying os.environ, rather
than an if block, as it is more pythonic/readable/concise, and reduces
the number of dict lookups.

This change allows aurweb configuration to be done via either:
- copying config.defaults to config and modifying values
- creating a new config only containing modified values, next to a
  config.defaults containing unmodified values

The motivation for this change is to enable ansible configuration in our
flagship deployment by storing only changed values, and deferring to
config.defaults otherwise.

A side benefit is, it is easier to see what has changed by inspecting
only the site configuration file.

If a config.defaults file does not exist next to $AUR_CONFIG or in
$AUR_CONFIG_DEFAULTS, it is ignored and *all* values are expected to
live in the modified config file.

Signed-off-by: Eli Schwartz <eschwartz@archlinux.org>
Signed-off-by: Lukas Fleischer <lfleischer@archlinux.org>
This commit is contained in:
Eli Schwartz 2018-04-15 10:29:43 -04:00 • committed by Lukas Fleischer
parent 2b280ea3d8
commit 97c5bcec13
5 changed files with 22 additions and 8 deletions
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6
INSTALL
View file

@ -40,8 +40,10 @@ read the instructions below.
Ensure to enable the pdo_mysql extension in php.ini.
3) Copy conf/config.proto to /etc/aurweb/config and adjust the configuration
(pay attention to disable_http_login, enable_maintenance and aur_location).
3) Optionally copy conf/config.defaults to /etc/aurweb/. Create or copy
/etc/aurweb/config (this is expected to contain all configuration settings
if the defaults file does not exist) and adjust the configuration (pay
attention to disable_http_login, enable_maintenance and aur_location).
4) Create a new MySQL database and a user and import the aurweb SQL schema:

2
TESTING
View file

@ -23,7 +23,7 @@ INSTALL.
$ sqlite3 ../aurweb.sqlite3 < aur-schema-sqlite.sql
$ sqlite3 ../aurweb.sqlite3 < out.sql
4) Copy conf/config.proto to conf/config and adjust the configuration
4) Copy conf/config.defaults to conf/config and adjust the configuration
(pay attention to disable_http_login, enable_maintenance and aur_location).
Be sure to change backend to sqlite and name to the file location of your

10
aurweb/config.py
View file

@ -8,11 +8,13 @@ def _get_parser():
global _parser
if not _parser:
path = os.environ.get('AUR_CONFIG', '/etc/aurweb/config')
defaults = os.environ.get('AUR_CONFIG_DEFAULTS', path + '.defaults')
_parser = configparser.RawConfigParser()
if 'AUR_CONFIG' in os.environ:
path = os.environ.get('AUR_CONFIG')
else:
path = "/etc/aurweb/config"
if os.path.isfile(defaults):
with open(defaults) as f:
_parser.read_file(f)
_parser.read(path)
return _parser

0
conf/config.proto → conf/config.defaults
View file

12
web/lib/confparser.inc.php
View file

@ -8,11 +8,21 @@ function config_load() {
if (!$path) {
$path = "/etc/aurweb/config";
}
$defaults_path = getenv('AUR_CONFIG_DEFAULTS');
if (!$defaults_path) {
$defaults_path = path . ".defaults";
}
if (file_exists($defaults_path)) {
$default_config = parse_ini_file($defaults_path, true, INI_SCANNER_RAW);
} else {
$default_config = [];
}
if (file_exists($path)) {
$AUR_CONFIG = parse_ini_file($path, true, INI_SCANNER_RAW);
$config = parse_ini_file($path, true, INI_SCANNER_RAW);
} else {
die("aurweb config file not found");
}
$AUR_CONFIG = array_replace_recursive($default_config, $config)
}
}