test and implementation for more robust output formatting

lib/output.sh

@@ -2,16 +2,19 @@ info() {
   echo "       $*"
 }
 
-# sed has a problem with the huge build output from npm 3
-# try awk? awk  '{ print "       " $0 }'
+# format output on both OSX and Ubuntu, cedar-10 and cedar-14, while also splitting to a log file
 output() {
   local logfile="$1"
   local c='s/^/       /'
 
-  case $(uname) in
-    Darwin) tee -a "$logfile" | awk '{ print "       " $0 }';;
-    *)      tee -a "$logfile" | awk -W interactive '{ print "       " $0 }';;
-  esac
+  if [ "${STACK:-cedar-14}" = "cedar" ]; then
+    tee -a "$logfile" | awk -W interactive '{ print "       " $0 }'
+  else
+    case $(uname) in
+      Darwin) sed -l "$c" | tee -i -a "$logfile" 2> /dev/null;;
+      *)      stdbuf -oL -eL sed -u "$c" | tee -i -a "$logfile" 2> /dev/null;;
+    esac
+  fi
 }
 
 header() {

makefile

@@ -2,12 +2,12 @@ test: test-cedar-14 test-cedar-10
 
 test-cedar-14:
 	@echo "Running tests in docker (cedar-14)..."
-	@docker run -v $(shell pwd):/buildpack:ro --rm -it heroku/cedar:14 bash -c 'cp -r /buildpack /buildpack_test; cd /buildpack_test/; test/run;'
+	@docker run -v $(shell pwd):/buildpack:ro --rm -it -e "STACK=cedar-14" heroku/cedar:14 bash -c 'cp -r /buildpack /buildpack_test; cd /buildpack_test/; test/run;'
 	@echo ""
 
 test-cedar-10:
 	@echo "Running tests in docker (cedar)..."
-	@docker run -v $(shell pwd):/buildpack:ro --rm -it fabiokung/cedar bash -c 'cp -r /buildpack /buildpack_test; cd /buildpack_test/; test/run;'
+	@docker run -v $(shell pwd):/buildpack:ro --rm -it -e "STACK=cedar" fabiokung/cedar bash -c 'cp -r /buildpack /buildpack_test; cd /buildpack_test/; test/run;'
 
 shell:
 	@echo "Opening cedar-14 shell..."