def parsesplicemap(self, path):
"""check and validate the splicemap format and
return a child/parents dictionary.
Format checking has two parts.
1. generic format which is same across all source types
2. specific format checking which may be different for
different source type. This logic is implemented in
checkrevformat function in source files like
hg.py, subversion.py etc.
"""
if not path:
return {}
m = {}
try:
fp = open(path, b'rb')
for i, line in enumerate(util.iterfile(fp)):
line = line.splitlines()[0].rstrip()
if not line:
# Ignore blank lines
continue
# split line
lex = common.shlexer(data=line, whitespace=b',')
line = list(lex)
# check number of parents
if not (2 <= len(line) <= 3):
raise error.Abort(
_(
b'syntax error in %s(%d): child parent1'
b'[,parent2] expected'
)
% (path, i + 1)
)
for part in line:
self.source.checkrevformat(part)
child, p1, p2 = line[0], line[1:2], line[2:]
if p1 == p2:
m[child] = p1
else:
m[child] = p1 + p2
# if file does not exist or error reading, exit
except IOError:
raise error.Abort(
_(b'splicemap file not found or error reading %s:') % path
)
return m
def _read(self):
if not self.path:
return
try:
fp = open(self.path, 'r')
except IOError as err:
if err.errno != errno.ENOENT:
raise
return
for i, line in enumerate(util.iterfile(fp)):
line = line.splitlines()[0].rstrip()
if not line:
# Ignore blank lines
continue
try:
key, value = line.rsplit(' ', 1)
except ValueError:
raise error.Abort(
_('syntax error in %s(%d): key/value pair expected') %
(self.path, i + 1))
if key not in self:
self.order.append(key)
super(mapfile, self).__setitem__(key, value)
fp.close()