changeset 180:ff6efc1ab9e4

protocol: allow hglib user to get call backs for prompts, output and errors setcbout(cbout), setcberr(cberr) and setcbprompt(cbprompt) are used to set the call back function used by the hgclient class. cb stands for call back. cbout is a function that will be called with the stdout data of the command as it runs. cbout is called with output as it is made available, which can be as partial lines or multiple lines. cberr is a function that will be called with the stderr data of the command as it runs. cberr is called with output as it is made available, which can be as partial lines or multiple lines. Command that make remote connects can prompt for username and password for HTTP/HTTPS connections. cbprompt is called when hgclient need a response to a prompt from the server. It receives the max number of bytes to return and the contents of stdout received so far. The last text sent to either cbout or cberr will contain the prompt text itself.
author Barry A. Scott <barry@barrys-emacs.org>
date Fri, 28 Oct 2016 11:33:20 +0100
parents c4c0efb37187
children cdb5a320d2bf
files hglib/client.py
diffstat 1 files changed, 48 insertions(+), 1 deletions(-) [+]
line wrap: on
line diff
--- a/hglib/client.py	Tue Oct 18 17:45:17 2016 +0100
+++ b/hglib/client.py	Fri Oct 28 11:33:20 2016 +0100
@@ -59,11 +59,42 @@
         # include the hidden changesets if True
         self.hidden = None
 
+        self._cbout = None
+        self._cberr = None
+        self._cbprompt = None
+
         if connect:
             self.open()
 
         self._protocoltracefn = None
 
+    def setcbout(self, cbout):
+        """
+        cbout is a function that will be called with the stdout data of
+        the command as it runs. Call with None to stop getting call backs.
+        """
+        self._cbout = cbout
+
+    def setcberr(self, cberr):
+        """
+        cberr is a function that will be called with the stderr data of
+        the command as it runs.Call with None to stop getting call backs.
+        """
+        self._cberr = cberr
+
+    def setcbprompt(self, cbprompt):
+        """
+        cbprompt is used to reply to prompts by the server
+        It receives the max number of bytes to return and the
+        contents of stdout received so far.
+
+        Call with None to stop getting call backs.
+
+        cbprompt is never called from merge() or import_()
+        which already handle the prompt.
+        """
+        self._cbprompt = cbprompt
+
     def setprotocoltrace(self, tracefn=None):
         """
         if tracefn is None no trace calls will be made.
@@ -180,9 +211,25 @@
         It receives the max number of bytes to return
         """
         out, err = BytesIO(), BytesIO()
-        outchannels = {b('o') : out.write, b('e') : err.write}
+        outchannels = {}
+        if self._cbout is None:
+            outchannels[b('o')] = out.write
+        else:
+            def out_handler(data):
+                out.write(data)
+                self._cbout(data)
+            outchannels[b('o')] = out_handler
+        if self._cberr is None:
+            outchannels[b('e')] = err.write
+        else:
+            def err_handler(data):
+                err.write(data)
+                self._cberr(data)
+            outchannels[b('e')] = err_handler
 
         inchannels = {}
+        if prompt is None:
+            prompt = self._cbprompt
         if prompt is not None:
             def func(size):
                 reply = prompt(size, out.getvalue())