Add a fallback to optparse if argparse is not found

3 files changed, 39 insertions, 9 deletions

diff --git a/doc/en/install.txt b/doc/en/install.txt
index 49232abd..1d1be48b 100644
--- a/doc/en/install.txt
+++ b/doc/en/install.txt
@@ -37,6 +37,9 @@ In order for poezio to correctly work, you need the libs SleekXMPP and
 
 === Dependencies ===
 
+NOTE: If your python3 version is too old because of debian (e.g. < 3.2), you
+should install the python3-argparse package if it exists, or use
+pip3/virtualenvs to install it.
 
 If you want to install SleekXMPP and dnspython by yourself, follow these
  instructions. Else, go to the next section (recommended).
diff --git a/src/args.py b/src/args.py
new file mode 100644
index 00000000..b0334fcc
--- /dev/null
+++ b/src/args.py
@@ -0,0 +1,34 @@
+"""
+Module related to the argument parsing
+
+There is a fallback to the deprecated optparse if argparse is not found
+"""
+from os import path
+
+def parse_args(CONFIG_PATH=''):
+    """
+    Parse the arguments from the command line
+    """
+    try:
+        from argparse import ArgumentParser, SUPPRESS
+    except ImportError:
+        from optparse import OptionParser
+        from optparse import SUPPRESS_USAGE as SUPPRESS
+        parser = OptionParser()
+        parser.add_option("-f", "--file", dest="filename", default=path.join(CONFIG_PATH, 'poezio.cfg'),
+                            usage="The config file you want to use", metavar="CONFIG_FILE")
+        parser.add_option("-d", "--debug", dest="debug",
+                            usage="The file where debug will be written", metavar="DEBUG_FILE")
+        parser.add_option("-v", "--version", dest="version",
+                            usage=SUPPRESS, metavar="VERSION", default="0.8-dev")
+        (options, args) = parser.parse_args()
+    else:
+        parser = ArgumentParser()
+        parser.add_argument("-f", "--file", dest="filename", default=path.join(CONFIG_PATH, 'poezio.cfg'),
+                            help="The config file you want to use", metavar="CONFIG_FILE")
+        parser.add_argument("-d", "--debug", dest="debug",
+                            help="The file where debug will be written", metavar="DEBUG_FILE")
+        parser.add_argument("-v", "--version", dest="version",
+                            help=SUPPRESS, metavar="VERSION", default="0.8-dev")
+        options = parser.parse_args()
+    return options
diff --git a/src/config.py b/src/config.py
index 99a05118..8a0c322c 100644
--- a/src/config.py
+++ b/src/config.py
@@ -15,7 +15,7 @@ DEFSECTION = "Poezio"
 from configparser import RawConfigParser, NoOptionError, NoSectionError
 from os import environ, makedirs, path
 from shutil import copy2
-from argparse import ArgumentParser, SUPPRESS
+from args import parse_args
 
 class Config(RawConfigParser):
     """
@@ -192,14 +192,7 @@ if not path.isfile(path.join(CONFIG_PATH, 'poezio.cfg')):
     copy2(path.join(path.dirname(__file__), '../data/default_config.cfg'), path.join(CONFIG_PATH, 'poezio.cfg'))
     firstrun = True
 
-parser = ArgumentParser()
-parser.add_argument("-f", "--file", dest="filename", default=path.join(CONFIG_PATH, 'poezio.cfg'),
-                    help="The config file you want to use", metavar="CONFIG_FILE")
-parser.add_argument("-d", "--debug", dest="debug",
-                    help="The file where debug will be written", metavar="DEBUG_FILE")
-parser.add_argument("-v", "--version", dest="version",
-                    help=SUPPRESS, metavar="VERSION", default="0.8-dev")
-options = parser.parse_args()
+options = parse_args(CONFIG_PATH)
 config = Config(options.filename)
 if firstrun:
     config.set('firstrun', True)