scmutil: add a dirs class
This encapsulates the "multiset of directories" structures that are
currently open-coded (and duplicated) in both the dirstate and
context modules.
This will be used, and optionally replaced by a C implementation,
in upcoming changes.
--- a/mercurial/scmutil.py Wed Apr 10 15:08:25 2013 -0700
+++ b/mercurial/scmutil.py Wed Apr 10 15:08:26 2013 -0700
@@ -891,6 +891,42 @@
except KeyError:
raise AttributeError(self.name)
+class dirs(object):
+ '''a multiset of directory names from a dirstate or manifest'''
+
+ def __init__(self, map, skip=None):
+ self._dirs = {}
+ addpath = self.addpath
+ if util.safehasattr(map, 'iteritems') and skip is not None:
+ for f, s in map.iteritems():
+ if s[0] != skip:
+ addpath(f)
+ else:
+ for f in map:
+ addpath(f)
+
+ def addpath(self, path):
+ dirs = self._dirs
+ for base in finddirs(path):
+ if base in dirs:
+ dirs[base] += 1
+ return
+ dirs[base] = 1
+
+ def delpath(self, path):
+ dirs = self._dirs
+ for base in finddirs(path):
+ if dirs[base] > 1:
+ dirs[base] -= 1
+ return
+ del dirs[base]
+
+ def __iter__(self):
+ return self._dirs.iterkeys()
+
+ def __contains__(self, d):
+ return d in self._dirs
+
def finddirs(path):
pos = path.rfind('/')
while pos != -1: