author | Brendan Cully <brendan@kublai.com> |
Wed, 25 Oct 2006 15:10:30 -0700 | |
changeset 3516 | 54246ac4b652 |
parent 3215 | 53e843840349 |
child 3607 | f4c9bb4ad7b1 |
permissions | -rw-r--r-- |
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# manifest.py - manifest revision class for mercurial |
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# |
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# Copyright 2005, 2006 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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from revlog import * |
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from i18n import gettext as _ |
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from demandload import * |
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demandload(globals(), "array bisect struct") |
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demandload(globals(), "mdiff") |
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class manifestdict(dict): |
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def __init__(self, mapping=None, flags=None): |
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if mapping is None: mapping = {} |
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if flags is None: flags = {} |
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dict.__init__(self, mapping) |
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self._flags = flags |
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def flags(self, f): |
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return self._flags.get(f, "") |
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def execf(self, f): |
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"test for executable in manifest flags" |
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return "x" in self.flags(f) |
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def linkf(self, f): |
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"test for symlink in manifest flags" |
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return "l" in self.flags(f) |
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def rawset(self, f, entry): |
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self[f] = bin(entry[:40]) |
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fl = entry[40:-1] |
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if fl: self._flags[f] = fl |
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def set(self, f, execf=False, linkf=False): |
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if linkf: self._flags[f] = "l" |
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elif execf: self._flags[f] = "x" |
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else: self._flags[f] = "" |
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def copy(self): |
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return manifestdict(dict.copy(self), dict.copy(self._flags)) |
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class manifest(revlog): |
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def __init__(self, opener, defversion=REVLOGV0): |
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self.mapcache = None |
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self.listcache = None |
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revlog.__init__(self, opener, "00manifest.i", "00manifest.d", |
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defversion) |
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def parselines(self, lines): |
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for l in lines.splitlines(1): |
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yield l.split('\0') |
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def readdelta(self, node): |
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delta = mdiff.patchtext(self.delta(node)) |
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deltamap = manifestdict() |
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for f, n in self.parselines(delta): |
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deltamap.rawset(f, n) |
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return deltamap |
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def read(self, node): |
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if node == nullid: return manifestdict() # don't upset local cache |
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if self.mapcache and self.mapcache[0] == node: |
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return self.mapcache[1] |
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text = self.revision(node) |
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self.listcache = array.array('c', text) |
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mapping = manifestdict() |
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for f, n in self.parselines(text): |
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mapping.rawset(f, n) |
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self.mapcache = (node, mapping) |
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return mapping |
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def _search(self, m, s, lo=0, hi=None): |
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'''return a tuple (start, end) that says where to find s within m. |
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If the string is found m[start:end] are the line containing |
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that string. If start == end the string was not found and |
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they indicate the proper sorted insertion point. This was |
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taken from bisect_left, and modified to find line start/end as |
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it goes along. |
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m should be a buffer or a string |
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s is a string''' |
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def advance(i, c): |
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while i < lenm and m[i] != c: |
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i += 1 |
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return i |
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lenm = len(m) |
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if not hi: |
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hi = lenm |
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while lo < hi: |
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mid = (lo + hi) // 2 |
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start = mid |
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while start > 0 and m[start-1] != '\n': |
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start -= 1 |
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end = advance(start, '\0') |
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if m[start:end] < s: |
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# we know that after the null there are 40 bytes of sha1 |
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# this translates to the bisect lo = mid + 1 |
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lo = advance(end + 40, '\n') + 1 |
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else: |
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# this translates to the bisect hi = mid |
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hi = start |
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end = advance(lo, '\0') |
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found = m[lo:end] |
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if cmp(s, found) == 0: |
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# we know that after the null there are 40 bytes of sha1 |
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end = advance(end + 40, '\n') |
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return (lo, end+1) |
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else: |
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return (lo, lo) |
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def find(self, node, f): |
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'''look up entry for a single file efficiently. |
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return (node, flag) pair if found, (None, None) if not.''' |
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if self.mapcache and node == self.mapcache[0]: |
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return self.mapcache[1].get(f), self.mapcache[1].flags(f) |
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text = self.revision(node) |
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start, end = self._search(text, f) |
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if start == end: |
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return None, None |
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l = text[start:end] |
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f, n = l.split('\0') |
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return bin(n[:40]), n[40:-1] == 'x' |
dbdce3b99988
fix parsing of tags. make parse errors useful. add new tag tests.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
2142
diff
changeset
|
121 |
|
2853 | 122 |
def add(self, map, transaction, link, p1=None, p2=None, |
741 | 123 |
changed=None): |
644 | 124 |
# apply the changes collected during the bisect loop to our addlist |
1534 | 125 |
# return a delta suitable for addrevision |
126 |
def addlistdelta(addlist, x): |
|
127 |
# start from the bottom up |
|
644 | 128 |
# so changes to the offsets don't mess things up. |
1534 | 129 |
i = len(x) |
644 | 130 |
while i > 0: |
131 |
i -= 1 |
|
1534 | 132 |
start = x[i][0] |
133 |
end = x[i][1] |
|
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if x[i][2]: |
|
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addlist[start:end] = array.array('c', x[i][2]) |
|
644 | 136 |
else: |
137 |
del addlist[start:end] |
|
1534 | 138 |
return "".join([struct.pack(">lll", d[0], d[1], len(d[2])) + d[2] \ |
139 |
for d in x ]) |
|
0
9117c6561b0b
Add back links from file revisions to changeset revisions
mpm@selenic.com
parents:
diff
changeset
|
140 |
|
644 | 141 |
# if we're using the listcache, make sure it is valid and |
142 |
# parented by the same node we're diffing against |
|
741 | 143 |
if not changed or not self.listcache or not p1 or \ |
144 |
self.mapcache[0] != p1: |
|
644 | 145 |
files = map.keys() |
146 |
files.sort() |
|
147 |
||
1651 | 148 |
# if this is changed to support newlines in filenames, |
149 |
# be sure to check the templates/ dir again (especially *-raw.tmpl) |
|
2853 | 150 |
text = ["%s\000%s%s\n" % (f, hex(map[f]), map.flags(f)) for f in files] |
1534 | 151 |
self.listcache = array.array('c', "".join(text)) |
644 | 152 |
cachedelta = None |
153 |
else: |
|
1534 | 154 |
addlist = self.listcache |
644 | 155 |
|
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# combine the changed lists into one list for sorting |
|
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work = [[x, 0] for x in changed[0]] |
|
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work[len(work):] = [[x, 1] for x in changed[1]] |
|
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work.sort() |
|
160 |
||
161 |
delta = [] |
|
1534 | 162 |
dstart = None |
163 |
dend = None |
|
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dline = [""] |
|
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start = 0 |
|
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# zero copy representation of addlist as a buffer |
|
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addbuf = buffer(addlist) |
|
644 | 168 |
|
1534 | 169 |
# start with a readonly loop that finds the offset of |
170 |
# each line and creates the deltas |
|
644 | 171 |
for w in work: |
172 |
f = w[0] |
|
741 | 173 |
# bs will either be the index of the item or the insert point |
2320
dbdce3b99988
fix parsing of tags. make parse errors useful. add new tag tests.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
2142
diff
changeset
|
174 |
start, end = self._search(addbuf, f, start) |
644 | 175 |
if w[1] == 0: |
2853 | 176 |
l = "%s\000%s%s\n" % (f, hex(map[f]), map.flags(f)) |
644 | 177 |
else: |
1534 | 178 |
l = "" |
179 |
if start == end and w[1] == 1: |
|
180 |
# item we want to delete was not found, error out |
|
181 |
raise AssertionError( |
|
3148
adb246ce6736
fix newline in error message
Benoit Boissinot <benoit.boissinot@ens-lyon.org>
parents:
3140
diff
changeset
|
182 |
_("failed to remove %s from manifest") % f) |
1534 | 183 |
if dstart != None and dstart <= start and dend >= start: |
184 |
if dend < end: |
|
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dend = end |
|
186 |
if l: |
|
187 |
dline.append(l) |
|
644 | 188 |
else: |
1534 | 189 |
if dstart != None: |
190 |
delta.append([dstart, dend, "".join(dline)]) |
|
191 |
dstart = start |
|
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dend = end |
|
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dline = [l] |
|
644 | 194 |
|
1534 | 195 |
if dstart != None: |
196 |
delta.append([dstart, dend, "".join(dline)]) |
|
197 |
# apply the delta to the addlist, and get a delta for addrevision |
|
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cachedelta = addlistdelta(addlist, delta) |
|
644 | 199 |
|
1534 | 200 |
# the delta is only valid if we've been processing the tip revision |
201 |
if self.mapcache[0] != self.tip(): |
|
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cachedelta = None |
|
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self.listcache = addlist |
|
204 |
||
205 |
n = self.addrevision(buffer(self.listcache), transaction, link, p1, \ |
|
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p2, cachedelta) |
|
2847
a9f5d4149123
Combine manifest dict and flags dict into a single object
Matt Mackall <mpm@selenic.com>
parents:
2846
diff
changeset
|
207 |
self.mapcache = (n, map) |
0
9117c6561b0b
Add back links from file revisions to changeset revisions
mpm@selenic.com
parents:
diff
changeset
|
208 |
|
9117c6561b0b
Add back links from file revisions to changeset revisions
mpm@selenic.com
parents:
diff
changeset
|
209 |
return n |