Writing the commit no to a text file (#21546)
Writing the commit no to a text file (#21546)

* setting an env variable using commit no

* change variable name

* try to use ref no as string

* use echo for output

* remove all the other stdout

* echo json instead of only the commit no

* use the file method

* list the directory contents

* remove pwd. print flutter version verbose
devoncarew/engine,chinmaygarde/flutter_engine,jamesr/sky_engine,jason-simmons/flutter_engine,flutter/engine,chinmaygarde/flutter_engine,chinmaygarde/flutter_engine,chinmaygarde/sky_engine,jason-simmons/sky_engine,devoncarew/engine,jason-simmons/flutter_engine,devoncarew/engine,flutter/engine,Hixie/sky_engine,jamesr/flutter_engine,devoncarew/sky_engine,jamesr/sky_engine,jason-simmons/flutter_engine,rmacnak-google/engine,rmacnak-google/engine,Hixie/sky_engine,chinmaygarde/sky_engine,jamesr/flutter_engine,rmacnak-google/engine,Hixie/sky_engine,rmacnak-google/engine,rmacnak-google/engine,devoncarew/sky_engine,flutter/engine,jamesr/flutter_engine,chinmaygarde/sky_engine,aam/engine,jason-simmons/sky_engine,jason-simmons/sky_engine,jason-simmons/sky_engine,jamesr/flutter_engine,jamesr/flutter_engine,jamesr/sky_engine,devoncarew/sky_engine,chinmaygarde/sky_engine,jamesr/sky_engine,jason-simmons/flutter_engine,rmacnak-google/engine,jamesr/sky_engine,aam/engine,devoncarew/sky_engine,devoncarew/engine,flutter/engine,flutter/engine,devoncarew/sky_engine,chinmaygarde/flutter_engine,jamesr/flutter_engine,jamesr/sky_engine,flutter/engine,Hixie/sky_engine,chinmaygarde/sky_engine,devoncarew/sky_engine,aam/engine,Hixie/sky_engine,rmacnak-google/engine,jason-simmons/sky_engine,devoncarew/engine,jamesr/sky_engine,chinmaygarde/sky_engine,Hixie/sky_engine,Hixie/sky_engine,jamesr/flutter_engine,devoncarew/engine,aam/engine,aam/engine,jason-simmons/flutter_engine,jamesr/flutter_engine,aam/engine,Hixie/sky_engine,chinmaygarde/sky_engine,jamesr/flutter_engine,flutter/engine,chinmaygarde/flutter_engine,jason-simmons/sky_engine,chinmaygarde/flutter_engine,jason-simmons/flutter_engine,jason-simmons/flutter_engine,flutter/engine,devoncarew/engine,jason-simmons/sky_engine,aam/engine,chinmaygarde/flutter_engine,devoncarew/sky_engine,jason-simmons/flutter_engine,aam/engine