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from reconfigure.nodes import *
from reconfigure.parsers import BaseParser
class ShellParser (BaseParser):
"""
A parser for shell scripts with variables
"""
def __init__(self, *args, **kwargs):
self.comment = '#'
self.continuation = '\\'
BaseParser.__init__(self, *args, **kwargs)
def parse(self, content):
rawlines = content.splitlines()
lines = []
while rawlines:
l = rawlines.pop(0).strip()
while self.continuation and rawlines and l.endswith(self.continuation):
l = l[:-len(self.continuation)]
l += rawlines.pop(0)
lines.append(l)
root = RootNode()
last_comment = None
for line in lines:
line = line.strip()
if line:
if line.startswith(self.comment):
c = line.strip(self.comment).strip()
if last_comment:
last_comment += '\n' + c
else:
last_comment = c
continue
if len(line) == 0:
continue
name, value = line.split('=', 1)
comment = None
if '#' in value:
value, comment = value.split('#', 1)
last_comment = (last_comment or '') + comment.strip()
node = PropertyNode(name.strip(), value.strip().strip('"'))
if last_comment:
node.comment = last_comment
last_comment = None
root.append(node)
return root
def stringify(self, tree):
r = ''
for node in tree.children:
if node.comment and '\n' in node.comment:
r += '\n' + ''.join('# %s\n' % x for x in node.comment.splitlines())
r += '%s="%s"' % (node.name, node.value)
if node.comment and not '\n' in node.comment:
r += ' # %s' % node.comment
r += '\n'
return r
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