Use openocd TCL source command instead of shell.

whitequark · whitequark · commit a48ec0a7b041 · 2018-01-27T17:41:36.000Z
diff --git a/master.cfg b/master.cfg
@@ -402,7 +402,7 @@ def addCoverallsUploadSteps(factory, repo_token):
 
 def addARTIQFlashSteps(factory, board, domain, options=[]):
     address = '{}.{}'.format(board, domain)
-    options = ['-I', '$(cat /var/lib/artiq/boards/{})'.format(board)] + options
+    options = ['-I', 'source /var/lib/artiq/boards/{}'.format(board)] + options
 
     factory.addStep(
         ShellCommand(
