custom double-redirector fixed

3 files changed, 23 insertions, 2 deletions

diff --git a/cmd2.py b/cmd2.py
index 332d9b3..e0ebca3 100755
--- a/cmd2.py
+++ b/cmd2.py
@@ -379,6 +379,7 @@ class Cmd(cmd.Cmd):
     debug = False
     locals_in_py = True
     kept_state = None
+    redirector = '>'                    # for sending output to file
     settable = stubbornDict('''
         prompt
         colors                Colorized output (*nix only)
@@ -665,7 +666,10 @@ class Cmd(cmd.Cmd):
           - args: if "quoted strings /* seem to " start comments?
           - command: what
         '''
-        outputParser = (pyparsing.Literal('>>') | (pyparsing.WordStart() + '>') | pyparsing.Regex('[^=]>'))('output')
+        #outputParser = (pyparsing.Literal('>>') | (pyparsing.WordStart() + '>') | pyparsing.Regex('[^=]>'))('output')
+        outputParser = (pyparsing.Literal(self.redirector *2) | \
+                       (pyparsing.WordStart() + self.redirector) | \
+                        pyparsing.Regex('[^=]' + self.redirector))('output')
         
         terminatorParser = pyparsing.Or([(hasattr(t, 'parseString') and t) or pyparsing.Literal(t) for t in self.terminators])('terminator')
         stringEnd = pyparsing.stringEnd ^ '\nEOF'
@@ -815,7 +819,7 @@ class Cmd(cmd.Cmd):
             self.kept_sys = Statekeeper(sys, ('stdout',))
             if statement.parsed.outputTo:
                 mode = 'w'
-                if statement.parsed.output == '>>':
+                if statement.parsed.output == 2 * self.redirector:
                     mode = 'a'
                 sys.stdout = self.stdout = open(os.path.expanduser(statement.parsed.outputTo), mode)                            
             else:
diff --git a/docs/freefeatures.rst b/docs/freefeatures.rst
index fef29ae..8795261 100644
--- a/docs/freefeatures.rst
+++ b/docs/freefeatures.rst
@@ -76,6 +76,22 @@ As in a Unix shell, output of a command can be redirected:
     to paste buffer requires software to be installed on the operating
     system, pywin32_ on Windows or xclip_ on \*nix.
     
+If your application depends on mathematical syntax, ``>`` may be a bad
+choice for redirecting output - it will prevent you from using the
+greater-than sign in your actual user commands.  You can override your
+app's value of ``self.redirector`` to use a different string for output redirection::
+
+    class MyApp(cmd2.Cmd):
+        redirector = '->'
+        
+::
+
+    (Cmd) say line1 -> out.txt
+    (Cmd) say line2 ->-> out.txt
+    (Cmd) !cat out.txt
+    line1
+    line2
+
 .. _pywin32: http://sourceforge.net/projects/pywin32/
 .. _xclip: http://www.cyberciti.biz/faq/xclip-linux-insert-files-command-output-intoclipboard/
   
diff --git a/example/example.py b/example/example.py
index 32f20f9..88cefd4 100755
--- a/example/example.py
+++ b/example/example.py
@@ -7,6 +7,7 @@ class CmdLineApp(Cmd):
     multilineCommands = ['orate']
     Cmd.shortcuts.update({'&': 'speak'})
     maxrepeats = 3
+    redirector = '->'
     Cmd.settable.append('maxrepeats   Max number of `--repeat`s allowed')
 
     @options([make_option('-p', '--piglatin', action="store_true", help="atinLay"),