[game-data-packager] 11/18: Teach the Python code to read game-data-packager.conf

[Simon McVittie]

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smcv pushed a commit to branch master
in repository game-data-packager.

commit b441099e24dc55f9b338a78041aa2efc288f068f
Author: Simon McVittie <smcv at debian.org>
Date:   Thu Jan 22 11:09:58 2015 +0000

    Teach the Python code to read game-data-packager.conf
---
 lib/game_data_packager/__init__.py |  9 ++++++
 lib/game_data_packager/config.py   | 64 ++++++++++++++++++++++++++++++++++++++
 lib/game_data_packager/paths.py    |  2 ++
 3 files changed, 75 insertions(+)

diff --git a/lib/game_data_packager/__init__.py b/lib/game_data_packager/__init__.py
index 71e30cf..2c0cc69 100644
--- a/lib/game_data_packager/__init__.py
+++ b/lib/game_data_packager/__init__.py
@@ -41,6 +41,7 @@ import zipfile
 from debian.deb822 import Deb822
 import yaml
 
+from .config import read_config
 from .paths import DATADIR, ETCDIR
 from .util import (MEBIBYTE,
         TemporaryUmask,
@@ -2295,6 +2296,7 @@ def run_command_line():
     for g in sorted(games.keys()):
         games[g].add_parser(game_parsers, base_parser)
 
+    config = read_config()
     parsed = argparse.Namespace(
             compress=None,
             destination=None,
@@ -2305,6 +2307,13 @@ def run_command_line():
             search=True,
             shortname=None,
     )
+    if config['install']:
+        logger.debug('obeying INSTALL=yes in configuration')
+        parsed.install = True
+    if config['preserve']:
+        logger.debug('obeying PRESERVE=yes in configuration')
+        parsed.destination = '.'
+
     parser.parse_args(namespace=parsed)
     logger.debug('parsed command-line arguments into: %r', parsed)
 
diff --git a/lib/game_data_packager/config.py b/lib/game_data_packager/config.py
new file mode 100644
index 0000000..d8a1e20
--- /dev/null
+++ b/lib/game_data_packager/config.py
@@ -0,0 +1,64 @@
+#!/usr/bin/python3
+# vim:set fenc=utf-8:
+#
+# Copyright © 2014-2015 Simon McVittie <smcv at debian.org>
+#
+# This program is free software; you can redistribute it and/or
+# modify it under the terms of the GNU General Public License
+# as published by the Free Software Foundation; either version 2
+# of the License, or (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+#
+# You can find the GPL license text on a Debian system under
+# /usr/share/common-licenses/GPL-2.
+
+import logging
+import re
+
+from .paths import CONFIG
+
+logger = logging.getLogger('game-data-packager.config')
+
+COMMENT = re.compile(r'#.*')
+OPTION = re.compile('^([A-Z]+)=(["\']?)(.*)\\2$')
+
+def read_config():
+    """The world's simplest shell script parser.
+    """
+
+    config = { 'install': False, 'preserve': True }
+
+    try:
+        with open(CONFIG) as conffile:
+            lineno = 0
+            for line in conffile:
+                lineno += 1
+                line = COMMENT.sub('', line)
+                line = line.strip()
+                if not line:
+                    continue
+                match = OPTION.match(line)
+                if match:
+                    k = match.group(1).lower()
+                    v = match.group(3)
+                    if k in config:
+                        if v == 'yes':
+                            config[k] = True
+                        elif v == 'no':
+                            config[k] = False
+                        else:
+                            logger.warning('%s:%d: unknown option value: %s=%r',
+                                    CONFIG, lineno, k, v)
+                    else:
+                        logger.warning('%s:%d: unknown option: %s',
+                                CONFIG, lineno, k)
+                else:
+                    logger.warning('%s:%d: could not parse line: %r',
+                        CONFIG, lineno, line)
+    except OSError:
+        pass
+
+    return config
diff --git a/lib/game_data_packager/paths.py b/lib/game_data_packager/paths.py
index 970e828..abb80c5 100644
--- a/lib/game_data_packager/paths.py
+++ b/lib/game_data_packager/paths.py
@@ -1,10 +1,12 @@
 import os
 
 if os.environ.get('GDP_UNINSTALLED'):
+    CONFIG = './etc/game-data-packager.conf'
     DATADIR = './out'
     ETCDIR = './etc'
     LIBDIR = './lib'
 else:
+    CONFIG = '/etc/game-data-packager.conf'
     DATADIR = '/usr/share/games/game-data-packager'
     ETCDIR = '/etc/game-data-packager'
     LIBDIR = '/usr/lib/game-data-packager'

-- 
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