Add bash shell function to make python work like it should.

bootstrap/win/win_tools.bat

 @echo off
 :: Copyright (c) 2012 The Chromium Authors. All rights reserved.
 :: Use of this source code is governed by a BSD-style license that can be
 :: found in the LICENSE file.
 
 :: This script will determine if python, git, or svn binaries need updates.  It
 :: returns 123 if the user's shell must restart, otherwise !0 is failure
 
 :: Sadly, we can't use SETLOCAL here otherwise it ERRORLEVEL is not correctly
 :: returned.
@@ skipping 82 matching lines @@
 
 call "%GIT_EXE_PATH%" --version 2>nul 1>nul
 if errorlevel 1 goto :GIT_INSTALL
 
 :: Several git versions can live side-by-side; check the top-level
 :: batch script to make sure it points to the desired version.
 for %%f in (git.bat gitk.bat ssh.bat ssh-keygen.bat git-bash) do (
   %FIND_EXE% "%GIT_BIN_DIR%" "%WIN_TOOLS_ROOT_DIR%\%%f" 2>nul 1>nul
   if errorlevel 1 goto :GIT_MAKE_BATCH_FILES
 )
+if not exist %GIT_INST_DIR%\etc\profile.d\python.sh goto :GIT_MAKE_BATCH_FILES
 goto :SYNC_GIT_HELP_FILES
 
 :GIT_INSTALL
 echo Installing git %GIT_VERSION% (avg 1-2 min download) ...
 
 if exist "%GIT_DOWNLOAD_PATH%" del "%GIT_DOWNLOAD_PATH%"
 echo Fetching from %GIT_FETCH_URL%
 cscript //nologo //e:jscript "%~dp0get_file.js" %GIT_FETCH_URL% "%GIT_DOWNLOAD_PATH%"
 if errorlevel 1 goto :GIT_FAIL
 :: Cleanup git directory if it already exists.
@@ skipping 18 matching lines @@
 
 :GIT_MAKE_BATCH_FILES
 :: Create the batch files.
 set GIT_TEMPL=%~dp0git.template.bat
 set SED=%GIT_INST_DIR%\usr\bin\sed.exe
 call "%SED%" -e "s/GIT_BIN_DIR/%GIT_BIN_DIR%/g" -e "s/GIT_PROGRAM/cmd\\\\git.exe/g" < %GIT_TEMPL% > "%WIN_TOOLS_ROOT_DIR%\git.bat"
 call "%SED%" -e "s/GIT_BIN_DIR/%GIT_BIN_DIR%/g" -e "s/GIT_PROGRAM/cmd\\\\gitk.exe/g" < %GIT_TEMPL% > "%WIN_TOOLS_ROOT_DIR%\gitk.bat"
 call "%SED%" -e "s/GIT_BIN_DIR/%GIT_BIN_DIR%/g" -e "s/GIT_PROGRAM/usr\\\\bin\\\\ssh.exe/g" < %GIT_TEMPL% > "%WIN_TOOLS_ROOT_DIR%\ssh.bat"
 call "%SED%" -e "s/GIT_BIN_DIR/%GIT_BIN_DIR%/g" -e "s/GIT_PROGRAM/usr\\\\bin\\\\ssh-keygen.exe/g" < %GIT_TEMPL% > "%WIN_TOOLS_ROOT_DIR%\ssh-keygen.bat"
 call "%SED%" -e "s/GIT_BIN_DIR/%GIT_BIN_DIR%/g" -e "s/PYTHON_BIN_DIR/python276_bin/g" -e "s/SVN_BIN_DIR/svn_bin/g" < %~dp0git-bash.template.sh > "%WIN_TOOLS_ROOT_DIR%\git-bash"
+copy "%~dp0profile.d.python.sh" %GIT_INST_DIR%\etc\profile.d\python.sh > NUL
 
 :: Ensure various git configurations are set correctly at they system level.
 call "%WIN_TOOLS_ROOT_DIR%\git.bat" config --system core.autocrlf false
 call "%WIN_TOOLS_ROOT_DIR%\git.bat" config --system core.filemode false
 call "%WIN_TOOLS_ROOT_DIR%\git.bat" config --system core.preloadindex true
 call "%WIN_TOOLS_ROOT_DIR%\git.bat" config --system core.fscache true
 
 :SYNC_GIT_HELP_FILES
 :: Copy all the depot_tools docs into the mingw64 git docs root.
 :: /i : Make sure xcopy knows that the destination names a folder, not a file
@@ skipping 62 matching lines @@
 goto :END
 
 
 :returncode
 set WIN_TOOLS_ROOT_URL=
 set WIN_TOOLS_ROOT_DIR=
 exit /b %ERRORLEVEL%
 
 :END
 call :returncode %ERRORLEVEL%