[FIX] logging, now all logs generated into .wlog dir; [ADD] searcher_string class

wexpect/console_reader.py

@@ -82,9 +82,11 @@ def init_logger():
             logger_filename = os.environ['WEXPECT_LOGGER_FILENAME']
         except KeyError:
             pid = os.getpid()
-            logger_filename = f'wexpect_{pid}'
+            logger_filename = f'./.wlog/wexpect_{pid}'
         logger.setLevel(logger_level)
-        fh = logging.FileHandler(f'{logger_filename}.log', 'w', 'utf-8')
+        logger_filename = f'{logger_filename}.log'
+        os.makedirs(os.path.dirname(logger_filename), exist_ok=True)
+        fh = logging.FileHandler(logger_filename, 'w', 'utf-8')
         formatter = logging.Formatter('%(asctime)s - %(filename)s::%(funcName)s - %(levelname)s - %(message)s')
         fh.setFormatter(formatter)
         logger.addHandler(fh)
@@ -143,10 +145,6 @@ class ConsoleReaderBase:
                 logger.info(e)
                 return
                   
-            time.sleep(.2)
-            self.write('ls')
-            self.write(os.linesep)
-                  
             paused = False
    
             while True:
@@ -186,7 +184,7 @@ class ConsoleReaderBase:
         finally:
             time.sleep(.1) 
             self.send_to_host(self.readConsoleToCursor())
-            time.sleep(1) 
+            time.sleep(.1)
             self.close_connection()
             
     def write(self, s):

wexpect/spawn.py

@@ -985,6 +985,103 @@ class searcher_re (object):
         return best_index
     
     
+class searcher_string (object):
+
+    """This is a plain string search helper for the spawn.expect_any() method.
+
+    Attributes:
+
+        eof_index     - index of EOF, or -1
+        timeout_index - index of TIMEOUT, or -1
+
+    After a successful match by the search() method the following attributes
+    are available:
+
+        start - index into the buffer, first byte of match
+        end   - index into the buffer, first byte after match
+        match - the matching string itself
+    """
+
+    def __init__(self, strings):
+
+        """This creates an instance of searcher_string. This argument 'strings'
+        may be a list; a sequence of strings; or the EOF or TIMEOUT types. """
+
+        self.eof_index = -1
+        self.timeout_index = -1
+        self._strings = []
+        for n, s in zip(list(range(len(strings))), strings):
+            if s is EOF:
+                self.eof_index = n
+                continue
+            if s is TIMEOUT:
+                self.timeout_index = n
+                continue
+            self._strings.append((n, s))
+
+    def __str__(self):
+
+        """This returns a human-readable string that represents the state of
+        the object."""
+
+        ss =  [ (ns[0],'    %d: "%s"' % ns) for ns in self._strings ]
+        ss.append((-1,'searcher_string:'))
+        if self.eof_index >= 0:
+            ss.append ((self.eof_index,'    %d: EOF' % self.eof_index))
+        if self.timeout_index >= 0:
+            ss.append ((self.timeout_index,'    %d: TIMEOUT' % self.timeout_index))
+        ss.sort()
+        ss = list(zip(*ss))[1]
+        return '\n'.join(ss)
+
+    def search(self, buffer, freshlen, searchwindowsize=None):
+
+        """This searches 'buffer' for the first occurence of one of the search
+        strings.  'freshlen' must indicate the number of bytes at the end of
+        'buffer' which have not been searched before. It helps to avoid
+        searching the same, possibly big, buffer over and over again.
+
+        See class spawn for the 'searchwindowsize' argument.
+
+        If there is a match this returns the index of that string, and sets
+        'start', 'end' and 'match'. Otherwise, this returns -1. """
+
+        absurd_match = len(buffer)
+        first_match = absurd_match
+
+        # 'freshlen' helps a lot here. Further optimizations could
+        # possibly include:
+        #
+        # using something like the Boyer-Moore Fast String Searching
+        # Algorithm; pre-compiling the search through a list of
+        # strings into something that can scan the input once to
+        # search for all N strings; realize that if we search for
+        # ['bar', 'baz'] and the input is '...foo' we need not bother
+        # rescanning until we've read three more bytes.
+        #
+        # Sadly, I don't know enough about this interesting topic. /grahn
+        
+        for index, s in self._strings:
+            if searchwindowsize is None:
+                # the match, if any, can only be in the fresh data,
+                # or at the very end of the old data
+                offset = -(freshlen+len(s))
+            else:
+                # better obey searchwindowsize
+                offset = -searchwindowsize
+            n = buffer.find(s, offset)
+            if n >= 0 and n < first_match:
+                first_match = n
+                best_index, best_match = index, s
+        if first_match == absurd_match:
+            return -1
+        self.match = best_match
+        self.start = first_match
+        self.end = self.start + len(self.match)
+        return best_index
+
+
+
         
 def main():
     try: