Added wrapper module

fs_uae_wrapper/wrapper.py

@@ -0,0 +1,116 @@
+#!/usr/bin/env python
+"""
+Wrapper for FS-UAE to perform some actions before and or after running the
+emulator, if appropriate option is enabled.
+"""
+import importlib
+import os
+import sys
+
+
+WRAPPER_KEY = 'wrapper'
+
+
+def get_wrapper_from_conf(conf):
+    """
+    Process config file only for 'wrapper' option. Specific wrapper modules
+    can reread the file, looking for specific for wrapper module options.
+    """
+    with open(conf) as fobj:
+        for line in fobj.readlines():
+            if WRAPPER_KEY in line and '=' in line:
+                key, val = parse_options(line)
+                if key == WRAPPER_KEY:
+                    break
+        else:
+            val = None
+
+    return val
+
+
+def parse_options(string):
+    """
+    Return parsed option as an key/value tuple, where key is an stripped
+    from dash option name and the value is an value stripped of whitespace.
+    """
+    key = val = None
+
+    if '=' in string:
+        key, val = string.split('=', 1)
+        if key.startswith('--'):
+            key = key[2:].strip()
+        else:
+            key = key.strip()
+        val = val.strip()
+    elif string.startswith('--'):
+        key = string[2:].strip()
+        val = 1
+
+    return key, val
+
+
+def parse_args():
+    """
+    Look out for config file and for config options which would be blindly
+    passed to fs-uae.
+    """
+    fs_conf = None
+    fs_uae_options = []
+    wrapper_options = {}
+    for parameter in sys.argv[1:]:
+        key, val = parse_options(parameter)
+        if key is not None and val is not None:
+            if key == WRAPPER_KEY:
+                wrapper_options[key] = val
+            else:
+                fs_uae_options.append(parameter)
+        else:
+            if os.path.exists(parameter):
+                fs_conf = parameter
+
+    if fs_conf is None and os.path.exists('Config.fs-uae'):
+        fs_conf = 'Config.fs-uae'
+
+    return fs_conf, fs_uae_options, wrapper_options
+
+
+def usage():
+    """Print help"""
+    sys.stdout.write("Usage: %s [conf-file] [fs-uae-option...]\n\n"
+                     % sys.argv[0])
+    sys.stdout.write("Config file is not required, if `Config.fs-uae' "
+                     "exists in the current\ndirectory, although it might "
+                     "depend on selected wrapper type. As for the\nfs-uae "
+                     "options, please see `http://fs-uae.net/options'. All "
+                     "options passed\nvia commandline should start with `--' "
+                     "and if they require argument, there\nshould not be a "
+                     "space around `='.\n\n")
+
+
+def run():
+    """run wrapper module"""
+    config_file, fs_uae_options, wrapper_options = parse_args()
+
+    if '--help' in fs_uae_options:
+        usage()
+        sys.exit(0)
+
+    if not config_file:
+        sys.stderr.write('Error: Configuration file not found\nSee --help'
+                         ' for usage\n')
+        sys.exit(10)
+
+    wrapper_module = wrapper_options.get(WRAPPER_KEY)
+    if not wrapper_module:
+        wrapper_module = get_wrapper_from_conf(wrapper_options)
+
+    if not wrapper_module:
+        wrapper = importlib.import_module('fs_uae_wrapper.plain')
+    else:
+        wrapper = importlib.import_module('fs_uae_wrapper.' + wrapper_module)
+
+    wrapper.run(config_file, fs_uae_options, wrapper_options)
+
+
+if __name__ == "__main__":
+    run()