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class Command:
def __init__(self, args, redirects):
self.args = list(args)
self.redirects = list(redirects)
def __repr__(self):
return 'Command(%r, %r)' % (self.args, self.redirects)
def __cmp__(self, other):
if not isinstance(other, Command):
return -1
return cmp((self.args, self.redirects),
(other.args, other.redirects))
def toShell(self, file):
for arg in self.args:
if "'" not in arg:
quoted = "'%s'" % arg
elif '"' not in arg and '$' not in arg:
quoted = '"%s"' % arg
else:
raise NotImplementedError('Unable to quote %r' % arg)
file.write(quoted)
# For debugging / validation.
import ShUtil
dequoted = list(ShUtil.ShLexer(quoted).lex())
if dequoted != [arg]:
raise NotImplementedError('Unable to quote %r' % arg)
for r in self.redirects:
if len(r[0]) == 1:
file.write("%s '%s'" % (r[0][0], r[1]))
else:
file.write("%s%s '%s'" % (r[0][1], r[0][0], r[1]))
class Pipeline:
def __init__(self, commands, negate=False, pipe_err=False):
self.commands = commands
self.negate = negate
self.pipe_err = pipe_err
def __repr__(self):
return 'Pipeline(%r, %r, %r)' % (self.commands, self.negate,
self.pipe_err)
def __cmp__(self, other):
if not isinstance(other, Pipeline):
return -1
return cmp((self.commands, self.negate, self.pipe_err),
(other.commands, other.negate, self.pipe_err))
def toShell(self, file, pipefail=False):
if pipefail != self.pipe_err:
raise ValueError('Inconsistent "pipefail" attribute!')
if self.negate:
file.write('! ')
for cmd in self.commands:
cmd.toShell(file)
if cmd is not self.commands[-1]:
file.write('|\n ')
class Seq:
def __init__(self, lhs, op, rhs):
assert op in (';', '&', '||', '&&')
self.op = op
self.lhs = lhs
self.rhs = rhs
def __repr__(self):
return 'Seq(%r, %r, %r)' % (self.lhs, self.op, self.rhs)
def __cmp__(self, other):
if not isinstance(other, Seq):
return -1
return cmp((self.lhs, self.op, self.rhs),
(other.lhs, other.op, other.rhs))
def toShell(self, file, pipefail=False):
self.lhs.toShell(file, pipefail)
file.write(' %s\n' % self.op)
self.rhs.toShell(file, pipefail)
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