Synnefo » snf-ganeti » ganeti-local

#

#

# Copyright (C) 2012 Google Inc.

#

# This program is free software; you can redistribute it and/or modify

# it under the terms of the GNU General Public License as published by

# the Free Software Foundation; either version 2 of the License, or

# (at your option) any later version.

#

# This program is distributed in the hope that it will be useful, but

# WITHOUT ANY WARRANTY; without even the implied warranty of

# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU

# General Public License for more details.

#

# You should have received a copy of the GNU General Public License

# along with this program; if not, write to the Free Software

# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA

# 02110-1301, USA.

"""Pygments lexer for our custom shell example sessions.

The lexer support the following custom markup:

  - comments: # this is a comment

  - command lines: '$ ' at the beginning of a line denotes a command

  - variable input: %input% (works in both commands and screen output)

  - otherwise, regular text output from commands will be plain

"""

from pygments.lexer import RegexLexer, bygroups, include

from pygments.token import Name, Text, Generic, Comment

class ShellExampleLexer(RegexLexer):

  name = "ShellExampleLexer"

  aliases = "shell-example"

  filenames = []

  tokens = {

    "root": [

      include("comments"),

      include("userinput"),

      # switch to state input on '$ ' at the start of the line

      (r"^\$ ", Text, "input"),

      (r"\s+", Text),

      (r"[^#%\s]+", Text),

      ],

    "input": [

      include("comments"),

      include("userinput"),

      (r"[^%\\\s]+", Generic.Strong),

      (r"\\\n", Generic.Strong),

      (r"\\", Generic.Strong),

      # switch to prev state at non-escaped new-line

      (r"\n", Text, "#pop"),

      (r"\s+", Text),

      ],

    "comments": [

      (r"#.*\n", Comment.Single),

      ],

    "userinput": [

      (r"\\%", Text),

      (r"(%)([^%]*)(%)", bygroups(None, Name.Variable, None)),

      ],

    }

def setup(app):

  app.add_lexer("shell-example", ShellExampleLexer())