I don't recognize the text of this license in a piece of software I need
to package as a dependency. The license listed on PyPi is "Freeware"
which doesn't seem right (and isn't a valid option anyway) but the
actual license text looks more permissive, except for the bit about "The
Software shall be used for Good, not Evil." That clause looks like it
might cause us some trouble...
Can I get a legal opinion? (The complete sources of the utility are
attached, including the license text in question).
I'm also going to contact upstream to see if I can get a license
clarification.
# This code is original from jsmin by Douglas Crockford, it was translated to
# Python by Baruch Even. It was refactored by Dave St.Germain for speed.
# The original code had the following copyright and license.
#
# /* jsmin.c
# 2007-01-08
#
# Copyright (c) 2002 Douglas Crockford (www.crockford.com)
#
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the "Software"), to deal
# in the Software without restriction, including without limitation the rights
# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
# copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included in
# all copies or substantial portions of the Software.
#
# The Software shall be used for Good, not Evil.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
# SOFTWARE.
# */
import sys
is_3 = sys.version_info >= (3, 0)
if is_3:
import io
else:
import StringIO
try:
import cStringIO
except ImportError:
cStringIO = None
__all__ = ['jsmin', 'JavascriptMinify']
__version__ = '2.0.2'
def jsmin(js):
"""
returns a minified version of the javascript string
"""
if not is_3:
if cStringIO and not isinstance(js, unicode):
# strings can use cStringIO for a 3x performance
# improvement, but unicode (in python2) cannot
klass = cStringIO.StringIO
else:
klass = StringIO.StringIO
else:
klass = io.StringIO
ins = klass(js)
outs = klass()
JavascriptMinify(ins, outs).minify()
return outs.getvalue()
class JavascriptMinify(object):
"""
Minify an input stream of javascript, writing
to an output stream
"""
def __init__(self, instream=None, outstream=None):
self.ins = instream
self.outs = outstream
def minify(self, instream=None, outstream=None):
if instream and outstream:
self.ins, self.outs = instream, outstream
write = self.outs.write
read = self.ins.read
space_strings = "abcdefghijklmnopqrstuvwxyz"\
"ABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789_$\\"
starters, enders = '{[(+-', '}])+-"\''
newlinestart_strings = starters + space_strings
newlineend_strings = enders + space_strings
do_newline = False
do_space = False
doing_single_comment = False
previous_before_comment = ''
doing_multi_comment = False
in_re = False
in_quote = ''
quote_buf = []
previous = read(1)
next1 = read(1)
if previous == '/':
if next1 == '/':
doing_single_comment = True
elif next1 == '*':
doing_multi_comment = True
else:
write(previous)
elif not previous:
return
elif previous >= '!':
if previous in "'\"":
in_quote = previous
write(previous)
previous_non_space = previous
else:
previous_non_space = ' '
if not next1:
return
while 1:
next2 = read(1)
if not next2:
last = next1.strip()
if not (doing_single_comment or doing_multi_comment)\
and last not in ('', '/'):
write(last)
break
if doing_multi_comment:
if next1 == '*' and next2 == '/':
doing_multi_comment = False
next2 = read(1)
elif doing_single_comment:
if next1 in '\r\n':
doing_single_comment = False
while next2 in '\r\n':
next2 = read(1)
if previous_before_comment in ')}]':
do_newline = True
elif in_quote:
quote_buf.append(next1)
if next1 == in_quote:
numslashes = 0
for c in reversed(quote_buf[:-1]):
if c != '\\':
break
else:
numslashes += 1
if numslashes % 2 == 0:
in_quote = ''
write(''.join(quote_buf))
elif next1 in '\r\n':
if previous_non_space in newlineend_strings \
or previous_non_space > '~':
while 1:
if next2 < '!':
next2 = read(1)
if not next2:
break
else:
if next2 in newlinestart_strings \
or next2 > '~' or next2 == '/':
do_newline = True
break
elif next1 < '!' and not in_re:
if (previous_non_space in space_strings \
or previous_non_space > '~') \
and (next2 in space_strings or next2 > '~'):
do_space = True
elif next1 == '/':
if (previous in ';\n\r{}' or previous < '!') and next2 in '/*':
if next2 == '/':
doing_single_comment = True
previous_before_comment = previous_non_space
elif next2 == '*':
doing_multi_comment = True
else:
if not in_re:
in_re = previous_non_space in '(,=:[?!&|'
elif previous_non_space != '\\':
in_re = not in_re
write('/')
else:
if do_space:
do_space = False
write(' ')
if do_newline:
write('\n')
do_newline = False
write(next1)
if not in_re and next1 in "'\"":
in_quote = next1
quote_buf = []
previous = next1
next1 = next2
if previous >= '!':
previous_non_space = previous
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