python-2.7.7, new build infrastructure

bin/compile

@@ -25,7 +25,7 @@ VIRTUALENV_LOC=".heroku/venv"
 LEGACY_TRIGGER="lib/python2.7"
 PROFILE_PATH="$BUILD_DIR/.profile.d/python.sh"
 
-DEFAULT_PYTHON_VERSION="python-2.7.6"
+DEFAULT_PYTHON_VERSION="python-2.7.7"
 PYTHON_EXE="/app/.heroku/python/bin/python"
 PIP_VERSION="1.5.6"
 SETUPTOOLS_VERSION="3.6"
@@ -110,7 +110,6 @@ fi
 
 # If no runtime given, assume default version.
 if [ ! -f runtime.txt ]; then
-  puts-step "No runtime.txt provided; assuming $DEFAULT_PYTHON_VERSION."
   echo $DEFAULT_PYTHON_VERSION > runtime.txt
 fi
 
@@ -156,13 +155,17 @@ fi
 if [ ! "$SKIP_INSTALL" ]; then
   bpwatch start install_python
     puts-step "Preparing Python runtime ($PYTHON_VERSION)"
-    curl http://envy-versions.s3.amazonaws.com/$PYTHON_VERSION.tar.bz2 -s | tar jx &> /dev/null
+
+    # Prepare destination directory.
+    mkdir -p .heroku/python
+
+    curl http://lang-python.s3.amazonaws.com/runtimes/$PYTHON_VERSION.tar.gz -s | tar zxv -C .heroku/python &> /dev/null
     if [[ $? != 0 ]] ; then
       puts-warn "Requested runtime ($PYTHON_VERSION) was not found."
       puts-warn "Aborting.  More info: https://devcenter.heroku.com/articles/python-support"
       exit 1
     fi
-    mv python .heroku/python
+
   bpwatch stop install_python
 
   # Record for future reference.