swc-windows-installer.py: Bring in Ethan's make_bash_profile and make_posix_path

This integerates some of Ethan's nano-installer changes.  In the pull
request, Ethan elaborates on the .bash_profile choice [1]:

  In response to comments on the Tutors list the installer now uses
  .bash_profile instead of .bashrc and appends the lines rather than
  overwriting the file. I have also added comments that indicate where
  the new lines in .bash_profile come from.

  Once the Python version is in I'll move on to getting this compiled
  into a .exe file, which should be more familiar to our students and
  won't run into issues with Canopy installs opening the file in
  Canopy rather than executing it.

The referenced tutors@ discussion is in the messages leading up to
[2], where Ethan top-quotes a discussion with R. David Murray about
the relative merits of .bash_profile and .bashrc.  The imporant point
David made was that .bash_profile is only executed once at login,
while .bashrc is executed for each new shell.  Putting PATH appends in
.bash_profile means that you don't end up adding duplicate entries to
the PATH as you spawn subshells.  For example:

  ${ORIGINAL_PATH}:${NANO_PATH}:${NANO_PATH}:...

[1]: https://github.com/swcarpentry/bc/pull/35
[2]: http://lists.software-carpentry.org/pipermail/tutors_lists.software-carpentry.org/2013-September/000969.html

diff --git a/setup/swc-windows-installer.py b/setup/swc-windows-installer.py
index c0bde19f800100e1ced14e98f706dbcb14c551a8..c4c7f414e860db1d6b7a7ee95e2bf4a424880b49 100755 (executable)
--- a/setup/swc-windows-installer.py
+++ b/setup/swc-windows-installer.py
@@ -67,6 +67,28 @@ def create_nosetests_entry_point(python_scripts_directory):
         f.write(contents)
 
 
+def make_bash_profile(home_dir, nano_dir):
+    """Creates a .bash_profile file for nano setup
+
+    Adds nano to the path and sets the default editor to nano
+
+    """
+
+    nano_path = make_posix_path(nano_dir)
+    contents = '\n'.join(['',
+                          '# Add nano to path and set as default editor',
+                          '# Added by the Software Carpentry nano installer',
+                          'export PATH=$PATH:%s' % nano_path,
+                          'export EDITOR=nano',
+                          ''])
+    with open(os.path.join(home_dir, '.bash_profile'), 'a') as f:
+        f.write(contents)
+
+def make_posix_path(windows_path):
+    """Convert a Windows path to a posix path"""
+    return windows_path.replace('\\', '/').replace('C:', '/c')
+
+
 def main():
     python_scripts_directory = "C:\\Anaconda\\Scripts\\"
     #python_scripts_directory = "./scripts/"