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inotify: server: new data structure to keep track of changes....
inotify: server: new data structure to keep track of changes. == Rationale for the new structure == Current structure was a dictionary tree. One directory was tracked as a dictionary: - keys: file/subdir name - values: - for a file, the status (a/r/m/...) - for a subdir, the directory representing the subdir It allowed efficient lookups, no matter of the type of the terminal leaf: for part in path.split('/'): tree = tree[part] However, there is no way to represent a directory and a file with the same name because keys are conflicting in the dictionary. Concrete example: Initial state: root dir |- foo (file) |- bar (file) # data state is: {'foo': 'n', 'bar': 'n'} Remove foo: root dir |- bar (file) # Data becomes {'foo': 'r'} until next commit. Add foo, as a directory, and foo/barbar file: root dir |- bar (file) |-> foo (dir) |- barbar (file) # New state should be represented as: {'foo': {'barbar': 'a'}, 'bar': 'n'} however, the key "foo" is already used and represents the old file. The dirstate: D foo A foo/barbar cannot be represented, hence the need for a new structure. == The new structure == 'directory' class. Represents one directory level. * Notable attributes: Two dictionaries: - 'files' Maps filename -> status for the current dir. - 'dirs' Maps subdir's name -> directory object representing the subdir * methods - walk(), formerly server.walk - lookup(), old server.lookup - dir(), old server.dir This new class allows embedding all the tree walks/lookups in its own class, instead of having everything mixed together in server. Incidently, since files and directories are not stored in the same dictionaries, we are solving the previous key conflict problem. The small drawback is that lookup operation is a bit more complex: for a path a/b/c/d/e we have to check twice the leaf, if e is a directory or a file.
Cédric Duval - - Load All Authors

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test-patchbomb
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#!/bin/sh
fixheaders()
{
sed -e 's/\(Message-Id:.*@\).*/\1/' \
-e 's/\(In-Reply-To:.*@\).*/\1/' \
-e 's/\(References:.*@\).*/\1/' \
-e 's/\(User-Agent:.*\)\/.*/\1/' \
-e 's/===.*/===/'
}
echo "[extensions]" >> $HGRCPATH
echo "patchbomb=" >> $HGRCPATH
COLUMNS=80; export COLUMNS
hg init t
cd t
echo a > a
hg commit -Ama -d '1 0'
hg email --date '1970-1-1 0:1' -n -f quux -t foo -c bar -r tip | \
fixheaders
echo b > b
hg commit -Amb -d '2 0'
hg email --date '1970-1-1 0:2' -n -f quux -t foo -c bar -s test -r 0:tip | \
fixheaders
hg email -m test.mbox -f quux -t foo -c bar -s test 0:tip
cd ..
hg clone -q t t2
cd t2
echo c > c
hg commit -Amc -d '3 0'
cat > description <<EOF
a multiline
description
EOF
echo "% test bundle and description"
hg email --date '1970-1-1 0:3' -n -f quux -t foo \
-c bar -s test -r tip -b --desc description | \
fixheaders
echo "% utf-8 patch"
python -c 'fp = open("utf", "wb"); fp.write("h\xC3\xB6mma!\n"); fp.close();'
hg commit -A -d '4 0' -m 'charset=utf-8; content-transfer-encoding: base64'
echo "% no mime encoding for email --test"
hg email --date '1970-1-1 0:4' -f quux -t foo -c bar -r tip -n | \
fixheaders > mailtest
echo "% md5sum of 8-bit output"
$TESTDIR/md5sum.py mailtest
rm mailtest
echo "% mime encoded mbox (base64)"
hg email --date '1970-1-1 0:4' -f quux -t foo -c bar -r tip -m mbox
cat mbox | fixheaders
rm mbox
echo "% mime encoded mbox (quoted-printable)"
python -c 'fp = open("qp", "wb"); fp.write("%s\nfoo\n\nbar\n" % \
("x" * 1024)); fp.close();'
hg commit -A -d '4 0' -m \
'charset=utf-8; content-transfer-encoding: quoted-printable'
echo "% no mime encoding for email --test"
hg email --date '1970-1-1 0:4' -f quux -t foo -c bar -r tip -n | \
fixheaders > mailtest
echo "% md5sum of qp output"
$TESTDIR/md5sum.py mailtest
rm mailtest
echo "% mime encoded mbox (quoted-printable)"
hg email --date '1970-1-1 0:4' -f quux -t foo -c bar -r tip -m mbox
cat mbox | fixheaders
rm mbox
echo "% iso-8859-1 patch"
python -c 'fp = open("isolatin", "wb"); fp.write("h\xF6mma!\n"); fp.close();'
hg commit -A -d '5 0' -m 'charset=us-ascii; content-transfer-encoding: 8bit'
echo "% fake ascii mbox"
hg email --date '1970-1-1 0:5' -f quux -t foo -c bar -r tip -m mbox
fixheaders < mbox > mboxfix
echo "% md5sum of 8-bit output"
$TESTDIR/md5sum.py mboxfix
echo "% test diffstat for single patch"
hg email --date '1970-1-1 0:1' -n -f quux -t foo -c bar -s test -d -y -r 2 | \
fixheaders
echo "% test diffstat for multiple patches"
hg email --date '1970-1-1 0:1' -n -f quux -t foo -c bar -s test -d -y \
-r 0:1 | fixheaders
echo "% test inline for single patch"
hg email --date '1970-1-1 0:1' -n -f quux -t foo -c bar -s test -i -r 2 | \
fixheaders
echo "% test inline for single patch (quoted-printable)"
hg email --date '1970-1-1 0:1' -n -f quux -t foo -c bar -s test -i -r 4 | \
fixheaders
echo "% test inline for multiple patches"
hg email --date '1970-1-1 0:1' -n -f quux -t foo -c bar -s test -i \
-r 0:1 -r 4 | fixheaders
echo "% test attach for single patch"
hg email --date '1970-1-1 0:1' -n -f quux -t foo -c bar -s test -a -r 2 | \
fixheaders
echo "% test attach for single patch (quoted-printable)"
hg email --date '1970-1-1 0:1' -n -f quux -t foo -c bar -s test -a -r 4 | \
fixheaders
echo "% test attach for multiple patches"
hg email --date '1970-1-1 0:1' -n -f quux -t foo -c bar -s test -a \
-r 0:1 -r 4 | fixheaders
echo "% test intro for single patch"
hg email --date '1970-1-1 0:1' -n --intro -f quux -t foo -c bar -s test \
-r 2 | fixheaders
echo "% test intro for multiple patches"
hg email --date '1970-1-1 0:1' -n --intro -f quux -t foo -c bar -s test \
-r 0:1 | fixheaders
echo "% tagging csets"
hg tag -r0 zero zero.foo
hg tag -r1 one one.patch
hg tag -r2 two two.diff
echo "% test inline for single named patch"
hg email --date '1970-1-1 0:1' -n -f quux -t foo -c bar -s test -i -r 2 | \
fixheaders
echo "% test inline for multiple named/unnamed patches"
hg email --date '1970-1-1 0:1' -n -f quux -t foo -c bar -s test -i -r 0:1 | \
fixheaders
echo "% test inreplyto"
hg email --date '1970-1-1 0:1' -n -f quux -t foo -c bar --in-reply-to baz \
-r tip | fixheaders
hg email --date '1970-1-1 0:1' -n -f quux -t foo -c bar --in-reply-to baz \
-r 0:1 | fixheaders