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# filelog.py - file history class for mercurial
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#
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# Copyright 2005 Matt Mackall <mpm@selenic.com>
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#
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# This software may be used and distributed according to the terms
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# of the GNU General Public License, incorporated herein by reference.
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import os
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from revlog import *
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from demandload import *
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demandload(globals(), "bdiff")
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class filelog(revlog):
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def __init__(self, opener, path):
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revlog.__init__(self, opener,
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os.path.join("data", self.encodedir(path + ".i")),
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os.path.join("data", self.encodedir(path + ".d")))
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# This avoids a collision between a file named foo and a dir named
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# foo.i or foo.d
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def encodedir(self, path):
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return (path
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.replace(".hg/", ".hg.hg/")
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.replace(".i/", ".i.hg/")
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.replace(".d/", ".d.hg/"))
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def decodedir(self, path):
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return (path
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.replace(".d.hg/", ".d/")
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.replace(".i.hg/", ".i/")
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.replace(".hg.hg/", ".hg/"))
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def read(self, node):
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t = self.revision(node)
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if not t.startswith('\1\n'):
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return t
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s = t.find('\1\n', 2)
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return t[s+2:]
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def readmeta(self, node):
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t = self.revision(node)
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if not t.startswith('\1\n'):
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return {}
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s = t.find('\1\n', 2)
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mt = t[2:s]
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m = {}
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for l in mt.splitlines():
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k, v = l.split(": ", 1)
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m[k] = v
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return m
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def add(self, text, meta, transaction, link, p1=None, p2=None):
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if meta or text.startswith('\1\n'):
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mt = ""
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if meta:
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mt = [ "%s: %s\n" % (k, v) for k,v in meta.items() ]
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text = "\1\n%s\1\n%s" % ("".join(mt), text)
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return self.addrevision(text, transaction, link, p1, p2)
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def renamed(self, node):
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if self.parents(node)[0] != nullid:
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return False
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m = self.readmeta(node)
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if m and m.has_key("copy"):
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return (m["copy"], bin(m["copyrev"]))
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return False
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def annotate(self, node):
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def decorate(text, rev):
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return ([rev] * len(text.splitlines()), text)
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def pair(parent, child):
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for a1, a2, b1, b2 in bdiff.blocks(parent[1], child[1]):
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child[0][b1:b2] = parent[0][a1:a2]
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return child
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# find all ancestors
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needed = {node:1}
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visit = [node]
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while visit:
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n = visit.pop(0)
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for p in self.parents(n):
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if p not in needed:
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needed[p] = 1
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visit.append(p)
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else:
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# count how many times we'll use this
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needed[p] += 1
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# sort by revision which is a topological order
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visit = [ (self.rev(n), n) for n in needed.keys() ]
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visit.sort()
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hist = {}
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for r,n in visit:
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curr = decorate(self.read(n), self.linkrev(n))
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for p in self.parents(n):
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if p != nullid:
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curr = pair(hist[p], curr)
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# trim the history of unneeded revs
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needed[p] -= 1
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if not needed[p]:
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del hist[p]
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hist[n] = curr
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return zip(hist[n][0], hist[n][1].splitlines(1))
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