sf in salesforce-deploy-tool-3.1.0

- old
+ new

@@ -27,11 +27,10 @@
 
 # Read sandbox environment
 begin
   config[:sandbox] = File.open(File.expand_path(SANDBOX_CONFIG_FILE)).read
 rescue
-  config[:sandbox] = nil
 end
 
 # Configuration variables firrst from ENV , if not config file
 
 # Git configs:
@@ -41,9 +40,10 @@
 
 # Salesforce credential configs
 config[:username]              =  ENV["SFDT_USERNAME"]              ||  config[:username]
 config[:password]              =  ENV["SFDT_PASSWORD"]              ||  config[:password]
 config[:salesforce_url]        =  ENV["SFDT_SALESFORCE_URL"]        ||  config[:salesforce_url] 
+config[:sandbox]               =  ENV['SFDT_SANDBOX']               ||  config[:sandbox]
 
 # Project configs
 config[:version_file]          =  ENV["SFDT_VERSION_FILE"]          ||  config[:version_file]
 config[:build_number_pattern]  =  ENV["SFDT_BUILD_NUMBER_PATTERN"]  ||  config[:build_number_pattern]
 config[:commit_hash_pattern]   =  ENV["SFDT_COMMIT_HASH_PATTERN"]   ||  config[:commit_hash_pattern]