language link part of evaluator

carp/src/bridge/bridge.py

@@ -1,7 +1,7 @@
 import argparse
 import threading
 import sys
-import hooks
+from bridge import carp
 from bridge.hooks import *
 from bridge.object_registry import registry
 
@@ -23,7 +23,7 @@ class EvalCommand:
 
     def execute_using_env(self, env):
         try:
-              self.execute()
+              return self.execute()
         except Exception as err:
               self.perform_proceed_action(notify_error(err,self))
 
@@ -44,7 +44,7 @@ class EvalCommand:
             return self.commandId
 
     def execute(self):
-        bridge.globals.proc.evaluate(self.statements)
+        return bridge.globals.proc.evaluate(self.statements)
 
 class Logger():
       def log(self, msg):
@@ -140,6 +140,7 @@ def run_bridge():
         help="enable logging")
     args = vars(ap.parse_args())
 
+    bridge.globals.proc = carp.start_carp_proc()
     bridge.globals.pharoPort = args["pharo"]
     if args["log"]:
           bridge.globals.logger = Logger()
@@ -148,7 +149,6 @@ def run_bridge():
     bridge.globals.pyPort = args["port"]
     bridge.globals.globalCommandList = CommandList()
     globalCommandList = bridge.globals.globalCommandList
-    bridge.globals.proc = carp.start_carp_proc()
     env = clean_locals_env()
     msg_service = None 
     if args["port"] == None:
@@ -165,14 +165,15 @@ def run_bridge():
           raise Exception("Invalid communication strategy.")
     bridge.globals.msg_service = msg_service
     msg_service.start()
-    bridge.globals.logger.log("PYTHON: Start consuming commands")
+    bridge.globals.logger.log("CARP: Carp version " + bridge.globals.proc.version_info())
+    bridge.globals.logger.log("CARP: Start consuming commands")
     while True:
           command = globalCommandList.consume_command()
-          bridge.globals.logger.log("PYTHON: Executing command " + command.command_id())
-          bridge.globals.logger.log("PYTHON: bindings: " + str(command.bindings))
-          bridge.globals.logger.log("PYTHON: " + command.statements)
-          command.execute_using_env(env)
-          bridge.globals.logger.log("PYTHON: Finished command execution")
+          bridge.globals.logger.log("CARP: Executing command " + command.command_id())
+          bridge.globals.logger.log("CARP: bindings: " + str(command.bindings))
+          bridge.globals.logger.log("CARP: " + command.statements)
+          notify(command.execute_using_env(env), command.command_id())
+          bridge.globals.logger.log("CARP: Finished command execution")
 
 if __name__ == "__main__":
     run_bridge()

carp/src/bridge/carp.py

@@ -1,13 +1,44 @@
-import subprocess
+import re
+import time
+import diplomat
 
 
 class CarpProc:
     def __init__(self):
-        self.proc = subprocess.Popen(['carp'])
+        self.proc = diplomat.Diplomat('carp')
+        self._version_info = None
+        self.adornment_re = re.compile(".\[33m.*?\[0m")
+
+    def wait_for_boot(self):
+        while not self.proc.output():
+            time.sleep(0.5)
+        return self
+
+    def version_info(self):
+        if not self._version_info:
+            self._version_info = list(self.proc.output_stream())[0].replace("Welcome to Carp ", "")[:-1]
+        return self._version_info
+
+    def read_output(self, old_output):
+        while self.proc.output() == old_output:
+            time.sleep(0.5)
+        res = self.adornment_re.sub("", self.proc.output()[len(old_output):]).strip()
+        if res.startswith("=> "):
+            return {'result': 'success', 'value': res[3:]}
+        if not res:
+            return {'result': 'success', 'value': '()'}
+        return {'result': 'error', 'value': res}
 
     def evaluate(self, statements):
-        self.proc.stdin.send(statements)
+        assert self.proc.is_running(), "carp process has died"
+        if not self._version_info:
+            self.version_info()
+
+        old_output = self.proc.output()
+        self.proc._process.stdin.write(statements.encode("utf-8") + b"\n")
+        self.proc._process.stdin.flush()
+        return self.read_output(old_output)
 
 
 def start_carp_proc():
-    return CarpProc()
+    return CarpProc().wait_for_boot()

carp/src/languagelink.py

@@ -1,4 +1,4 @@
-from bridge import bridge
-from bridge.bridge_hooks import *
+from bridge import bridge as b
+from bridge.hooks import *
 
-bridge.run_bridge()
+b.run_bridge()