Add aws_bash_completer

Just to be fair (there is one for zsh already, right?), consistent with
other tools that provide bash completer script out of the box, and to
help other projects like Homebrew
(Homebrew/legacy-homebrew#46781).

Author: Pavel Strashkin

README.rst

@@ -69,10 +69,13 @@ Command Completion
 
 The aws-cli package includes a very useful command completion feature.
 This feature is not automatically installed so you need to configure it manually.
-To enable tab completion for bash use the built-in command ``complete``::
+To enable tab completion for bash either use the built-in command ``complete``::
 
     $ complete -C aws_completer aws
 
+Or add ``bin/aws_bash_completer`` file under ``/etc/bash_completion.d``,
+``/usr/local/etc/bash_completion.d`` or any other ``bash_completion.d`` location.
+
 For tcsh::
 
     $ complete aws 'p/*/`aws_completer`/'

bin/aws_bash_completer

@@ -0,0 +1,6 @@
+# Typically that would be added under /etc/bash_completion.d,
+# /usr/local/etc/bash_completion.d, etc.
+
+# Adopted from bash completion for ant
+have aws_completer && \
+     complete -C aws_completer aws

setup.py

@@ -30,7 +30,7 @@
     packages=find_packages(exclude=['tests*']),
     package_data={'awscli': ['data/*.json', 'examples/*/*.rst',
                              'examples/*/*/*.rst', 'topics/*.rst',
-                             'topics/*.json']},
+                             'topics/*.json', 'bin/aws_bash_completer']},
     install_requires=requires,
     extras_require={
         ':python_version=="2.6"': [