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# ==================================================================
# Copyright (c) 2007,2008,2009 Metaweb Technologies, Inc.
# All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions
# are met:
# * Redistributions of source code must retain the above copyright
# notice, this list of conditions and the following disclaimer.
# * Redistributions in binary form must reproduce the above
# copyright notice, this list of conditions and the following
# disclaimer in the documentation and/or other materials provided
# with the distribution.
#
# THIS SOFTWARE IS PROVIDED BY METAWEB TECHNOLOGIES AND CONTRIBUTORS
# ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
# FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL METAWEB
# TECHNOLOGIES OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
# INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
# BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
# LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
# CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
# ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
# POSSIBILITY OF SUCH DAMAGE.
# ====================================================================
import sys
import optparse
from math import ceil
import logging
log = logging.getLogger()
class CmdException(Exception):
pass
# decorator for adding subcommand option parsers
def option(argname, *args, **kws):
kws['dest'] = argname
def decorate(f):
oparser = getattr(f, 'oparser', None)
if oparser is None:
# set usage= later?
f.oparser = oparser = optparse.OptionParser()
oparser.disable_interspersed_args()
oparser.add_option(*args, **kws)
return f
return decorate
class TableOut(object):
def __init__(self):
self.outf = sys.stdout
self.rows = []
self.cols = 1
# maximum number of lines to buffer
self.bufmax = 200
self.termwidth = 80
self.minspacing = 4
# should be false if using in a pipeline,
# true for human user (like ls)
if hasattr(self.outf, "isatty") and self.outf.isatty():
self.humane = True
else:
self.humane = False
def __call__(self, *items):
self.rows.append(items)
if self.cols < len(items):
self.cols = len(items)
if len(self.rows) > self.bufmax:
self.flush()
def flush(self):
if self.humane and self.cols == 1:
self.pack_list()
else:
self.tty_table()
self.rows = []
self.cols = 1
def pack_list(self):
l = [row[0] for row in self.rows]
maxlength = 0
for item in l:
if maxlength < len(item):
maxlength = len(item)
# round maxlength up to tab width
colwidth = int(ceil(maxlength + self.minspacing - 1))
if colwidth > 80:
colwidth = 80
ncols = self.termwidth // colwidth
colwidths = [colwidth] * ncols
all = l + [None]*ncols
row_major = False
if row_major:
items = [all[i:i+ncols] for i in range(0, len(l), ncols)]
else:
# standard unix ls order
nrows = (len(l)+ncols-1) // ncols
items = [all[i:i+nrows*ncols:nrows] for i in range(0, nrows)]
self.showtty(colwidths, items)
def tty_table(self):
l = self.rows
colwidths = []
for row in l:
if len(colwidths) < len(row):
colwidths = colwidths + [0] * (len(row) - len(colwidths))
for i, item in enumerate(row):
if colwidths[i] < len(item) + self.minspacing:
colwidths[i] = len(item) + self.minspacing
self.showtty(colwidths, l)
def showtty(self, colwidths, rows):
"""Simple unix style text table output"""
for row in rows:
#print '%s %r' % (type(row), row)
for i, item in enumerate(row):
if item is None: continue
self.outf.write(item)
# fill out column, except for last cell
if i < len(row) - 1:
padding = colwidths[i] - len(item)
if padding < 1:
padding = 1
self.outf.write(' ' * padding)
self.outf.write('\n')
# "out" is a function for generating a "row" of output
# the row can be one or more strings
#
out = TableOut()
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