Add command to run commands in sequence

commands/FBDebugCommands.py

@@ -17,6 +17,7 @@ def lldbcommands():
     FBFindInstancesCommand(),
     FBMethodBreakpointEnableCommand(),
     FBMethodBreakpointDisableCommand(),
+    FBSequenceCommand(),
   ]
 
 class FBWatchInstanceVariableCommand(fb.FBCommand):
@@ -377,3 +378,23 @@ def chiselLibraryPath(self):
     source_dir = os.path.dirname(source_path)
     # ugh: ../.. is to back out of commands/, then back out of libexec/
     return os.path.join(source_dir, '..', '..', 'lib', 'Chisel.framework', 'Chisel')
+
+
+class FBSequenceCommand(fb.FBCommand):
+  def name(self):
+    return 'sequence'
+
+  def description(self):
+    return 'Run commands in sequence, stopping on any error.'
+
+  def lex(self, commandLine):
+    return commandLine.split(';')
+
+  def run(self, arguments, options):
+    interpreter = lldb.debugger.GetCommandInterpreter()
+    # The full unsplit command is in position 0.
+    sequence = arguments[1:]
+    for command in sequence:
+      interpreter.HandleCommand(command.strip(), self.context, self.result)
+      if not self.result.Succeeded():
+        break

fblldb.py

@@ -55,7 +55,9 @@ def loadCommand(module, command, directory, filename, extension):
     name=name))
 
 def makeRunCommand(command, filename):
-  def runCommand(debugger, input, result, dict):
+  def runCommand(debugger, input, exe_ctx, result, _):
+    command.result = result
+    command.context = exe_ctx
     splitInput = command.lex(input)
 
     # OptionParser will throw in the case where you want just one big long argument and no