convert: add a mode where mercurial_sink skips empty revisions. The getchanges function of some converter_source classes can return some false positives. I.e. they sometimes claim that a file "foo" was changed in some revision, even though its contents are still the same. convert_svn is particularly bad, but I think this can also happen with convert_cvs and, at least in theory, with mercurial_source. For regular conversions this is not really a problem - as long as getfile returns the right contents, we'll get a converted revision with the right contents. But when we use --filemap, this could lead to superfluous revisions being converted. Instead of fixing every converter_source, I decided to change mercurial_sink to work around this problem. When --filemap is used, we're interested only in revisions that touch some specific files. If a revision doesn't change any of these files, then we're not interested in it (at least for revisions with a single parent; merges are special). For mercurial_sink, we abuse this property and rollback a commit if the manifest text hasn't changed. This avoids duplicating the logic from localrepo.filecommit to detect unchanged files.

     1

#!/bin/sh

     2

     3

set -e

     4

     5

echo "[extensions]" >> $HGRCPATH

     6

echo "hbisect=" >> $HGRCPATH

     7

     8

echo % init

     9

hg init

    10

    11

echo % committing changes

    12

count=0

    13

echo > a

    14

while test $count -lt 32 ; do

    15

    echo 'a' >> a

    16

    test $count -eq 0 && hg add

    17

    hg ci -m "msg $count" -d "$count 0"

    18

    echo % committed changeset $count

    19

    count=`expr $count + 1`

    20

done

    21

    22

echo % log

    23

hg log

    24

    25

echo % hg up -C

    26

hg up -C

    27

    28

echo % bisect test

    29

hg bisect init

    30

hg bisect bad

    31

hg bisect good 1

    32

hg bisect good

    33

hg bisect good

    34

hg bisect good

    35

hg bisect bad

    36

hg bisect good