update compile script to work with new buildpack-env-dir API

bin/common.sh

@@ -28,3 +28,16 @@ indent() {
 cat_npm_debug_log() {
   test -f $build_dir/npm-debug.log && cat $build_dir/npm-debug.log
 }
+
+export_env_dir() {
+  env_dir=$1
+  whitelist_regex=${2:-''}
+  blacklist_regex=${3:-'^(PATH|GIT_DIR|CPATH|CPPATH|LD_PRELOAD|LIBRARY_PATH)$'}
+  if [ -d "$env_dir" ]; then
+    for e in $(ls $env_dir); do
+      echo "$e" | grep -E "$whitelist_regex" | grep -qvE "$blacklist_regex" &&
+      export "$e=$(cat $env_dir/$e)"
+      :
+    done
+  fi
+}

bin/compile

@@ -7,7 +7,7 @@ set -o pipefail   # don't ignore exit codes when piping output
 # Configure directories
 build_dir=$1
 cache_dir=$2
-env_file=$3
+env_dir=$3
 
 bp_dir=$(cd $(dirname $0); cd ..; pwd)
 
@@ -71,9 +71,9 @@ fi
 
 # Scope config var availability only to `npm install`
 (
-  if [ "$env_file" ]; then
-    status "Importing application config vars"
-    export $(egrep -v "^(PATH|GIT_DIR|CPATH|CPPATH|LD_PRELOAD|LIBRARY_PATH)" "$env_file")
+  if [ -d "$env_dir" ]; then
+    status "Exporting config vars to environment"
+    export_env_dir $env_dir
   fi
 
   status "Installing dependencies"

bin/test

@@ -117,11 +117,12 @@ testEnvfileNotImported() {
   assertCapturedSuccess
 }
 
-testEnvfileImported() {
-  env_file=$(mktemp)
-  echo "FOO=1" > $env_file
-  compile "stable-node" "$(mktmpdir)" $env_file
-  assertCaptured "Importing application config vars"
+testEnvDirExported() {
+  env_dir=$(mktmpdir)
+  echo "chicken" > $env_dir/birds
+  echo "koi" > $env_dir/fish
+  compile "stable-node" "$(mktmpdir)" $env_dir
+  assertCaptured "Exporting config vars to environment"
   assertCapturedSuccess
 }