Vendorize argparse

This adds the argparse library [1] as autojump_argparse and imports it
via sys.path mangling in case argparse does not exist (Python 2.6 or
below without argparse installed).

This makes autojump effectively work with Python 2.6 again by default.

I have not verified license compatibility, but given the intention of
the (backport) project this is likely OK (it is licensed under the
Python license).

1: http://code.google.com/p/argparse/

Fixes issue #121.

bin/autojump

@@ -21,12 +21,17 @@
 
 from __future__ import division, print_function
 
-import argparse
-from operator import itemgetter
+import sys
 import os
+try:
+  import argparse
+except ImportError:
+  sys.path.append(os.path.dirname(os.path.realpath(__file__)))
+  import autojump_argparse as argparse
+  sys.path.pop()
+from operator import itemgetter
 import re
 import shutil
-import sys
 from tempfile import NamedTemporaryFile
 
 VERSION = 'release-v21-rc.2'

install.sh

@@ -110,35 +110,10 @@ fi
 if [ ! ${force} ]; then
     python_version=`python -c 'import sys; print(sys.version_info[:])'`
 
-    if [[ ${python_version:1:1} -eq 3 && ${python_version:4:1} -lt 2 ]]; then
+    if [[ ${python_version:1:1} -eq 2 && ${python_version:4:1} -lt 6 ]]; then
         echo
-        echo "Incompatible Python version, please upgrade to v2.7+ or v3.2+."
-        echo
-        echo "Alternatively, you can download v19 that supports Python v3.0+ from:"
-        echo
-        echo -e "\thttps://github.com/joelthelion/autojump/downloads"
-        echo
-        echo "OR"
-        echo
-        echo "Install argparse manually using 'pip install argparse' and then reattempt the installation using the --force option."
-        echo
-        exit 1
-    fi
-
-    if [[ ${python_version:1:1} -eq 2 && ${python_version:4:1} -lt 7 ]]; then
-        echo
-        echo "Incompatible Python version, please upgrade to v2.7+ or v3.2+."
-        if [[ ${python_version:4:1} -ge 6 ]]; then
-            echo
-            echo "Alternatively, you can download v19 that supports Python v2.6+ from:"
-            echo
-            echo -e "\thttps://github.com/joelthelion/autojump/downloads"
-            echo
-            echo "OR"
-            echo
-            echo "Install argparse manually using 'pip install argparse' and then reattempt the installation using the --force option."
-            echo
-        elif [[ ${python_version:4:1} -ge 4 ]]; then
+        echo "Incompatible Python version, please upgrade to v2.6+."
+        if [[ ${python_version:4:1} -ge 4 ]]; then
             echo
             echo "Alternatively, you can download v12 that supports Python v2.4+ from:"
             echo
@@ -163,6 +138,7 @@ mkdir -p ${prefix}/share/man/man1/
 cp -v ./bin/icon.png ${prefix}/share/autojump/
 cp -v ./bin/jumpapplet ${prefix}/bin/
 cp -v ./bin/autojump ${prefix}/bin/
+cp -v ./bin/autojump_argparse.py ${prefix}/bin/
 cp -v ./docs/autojump.1 ${prefix}/share/man/man1/
 
 # global installation