Improvements (#471)

* only do this on heroku-16

* history

Signed-off-by: Kenneth Reitz <me@kennethreitz.org>

* code comment

Signed-off-by: Kenneth Reitz <me@kennethreitz.org>

CHANGELOG.md

 # Python Buildpack Changelog
 
+# 117
+
+Bug fix.
+
 # 116
 
 Vendoring improvements.

bin/steps/geo-libs

@@ -30,7 +30,12 @@ if [[ "$BUILD_WITH_GEO_LIBRARIES" ]]; then
     curl "$VENDORED_GDAL" -s | tar zxv -C .heroku/vendor &> /dev/null
     curl "$VENDORED_GEOS" -s | tar zxv -C .heroku/vendor &> /dev/null
     curl "$VENDORED_PROJ" -s | tar zxv -C .heroku/vendor &> /dev/null
-    cp /usr/lib/x86_64-linux-gnu/libjasper.so* ".heroku/vendor/lib/."
+
+    # Copy libjasper from build image to slug.
+    if [[ "$STACK" == "heroku-16" ]]; then
+      cp /usr/lib/x86_64-linux-gnu/libjasper.so* ".heroku/vendor/lib/."
+    fi
+
   fi
 
   GDAL=$(pwd)/vendor