view tests/test-mq-strip @ 10251:a19d2993385d stable

subrepo: fix merging of already merged subrepos (issue1986)

This fixes a bug seen when merging a main repo which contains a subrepo when
both repos have been merged before. Each repo (main and sub) has two
branches, both of which have been merged before.

In a subrepo, if the revision to merge to is an ancestor of the current rev,
then the merge should be a noop.

Test provided by Steve Losh.

#!/bin/sh

echo "[extensions]" >> $HGRCPATH
echo "mq=" >> $HGRCPATH

teststrip() {
    hg up -C $1
    echo % before update $1, strip $2
    hg parents
    hg strip $2 2>&1 | sed 's/\(saving bundle to \).*/\1/'
    echo % after update $1, strip $2
    hg parents
    hg unbundle -q .hg/strip-backup/*
    rm .hg/strip-backup/*
}

hg init test
cd test

echo foo > bar
hg ci -Ama

echo more >> bar
hg ci -Amb

echo blah >> bar
hg ci -Amc

hg up 1
echo blah >> bar
hg ci -Amd

echo final >> bar
hg ci -Ame

hg log

teststrip 4 4
teststrip 4 3
teststrip 1 4
teststrip 4 2
teststrip 4 1
teststrip null 4

hg log

hg up -C 2
hg merge 4
echo % before strip of merge parent
hg parents
hg strip 4 2>&1 | sed 's/\(saving bundle to \).*/\1/'
echo % after strip of merge parent
hg parents