view tests/test-subrepo @ 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

rm -rf sub
mkdir sub
cd sub
hg init t
cd t

echo % first revision, no sub
echo a > a
hg ci -Am0

echo % add first sub
echo s = s > .hgsub
hg add .hgsub
hg init s
echo a > s/a
hg -R s ci -Ams0
hg ci -m1

echo % add sub sub
echo ss = ss > s/.hgsub
hg init s/ss
echo a > s/ss/a
hg -R s add s/.hgsub
hg -R s/ss add s/ss/a
hg ci -m2

echo % bump sub rev
echo b > s/a
hg -R s ci -ms1
hg ci -m3

echo % leave sub dirty
echo c > s/a
hg ci -m4
hg tip -R s

echo % check caching
hg co 0
hg debugsub
echo % restore
hg co
hg debugsub

echo % new branch for merge tests
hg co 1
echo t = t >> .hgsub
hg init t
echo t > t/t
hg -R t add t
echo % 5
hg ci -m5 # add sub
echo t2 > t/t
echo % 6
hg st -R s
hg ci -m6 # change sub
hg debugsub
echo t3 > t/t
echo % 7
hg ci -m7 # change sub again for conflict test
hg rm .hgsub
echo % 8
hg ci -m8 # remove sub

echo % merge tests
hg co -C 3
hg merge 5 # test adding
hg debugsub
hg ci -m9
hg merge 6 --debug # test change
hg debugsub
echo conflict > t/t
hg ci -m10
HGMERGE=internal:merge hg merge --debug 7 # test conflict
echo % should conflict
cat t/t

echo % clone
cd ..
hg clone t tc
cd tc
hg debugsub

echo % push
echo bah > t/t
hg ci -m11
hg push | sed 's/ .*sub/ ...sub/g'

echo % push -f
echo bah > s/a
hg ci -m12
hg push | sed 's/ .*sub/ ...sub/g'
hg push -f | sed 's/ .*sub/ ...sub/g'

echo % update
cd ../t
hg up -C # discard our earlier merge
echo blah > t/t
hg ci -m13

echo % pull
cd ../tc
hg pull | sed 's/ .*sub/ ...sub/g'
hg up # should pull t
cat t/t

echo % issue 1986
cd ..
rm -rf sub
hg init main
cd main

hg init s           # subrepo layout
cd s                #
echo a > a          #   o   5 br
hg ci -Am1          #  /|
hg branch br        # o |   4 default
echo a >> a         # | |
hg ci -m1           # | o   3 br
hg up default       # |/|
echo b > b          # o |   2 default
hg ci -Am1          # | |
hg up br            # | o   1 br
hg merge tip        # |/
hg ci -m1           # o     0 default
hg up 2
echo c > c
hg ci -Am1
hg up 3
hg merge 4
hg ci -m1

cd ..                         # main repo layout:
echo 's = s' > .hgsub         #
hg -R s up 2                  #   * <-- try to merge default into br again
hg ci -Am1                    # .`|
hg branch br                  # . o   5 br      --> substate = 5
echo b > b                    # . |
hg -R s up 3                  # o |   4 default --> substate = 4
hg ci -Am1                    # | |
hg up default                 # | o   3 br      --> substate = 2
echo c > c                    # |/|
hg ci -Am1                    # o |   2 default --> substate = 2
hg up 1                       # | |     
hg merge 2                    # | o   1 br      --> substate = 3
hg ci -m1                     # |/    
hg up 2                       # o     0 default --> substate = 2
hg -R s up 4
echo d > d
hg ci -Am1
hg up 3
hg -R s up 5
echo e > e
hg ci -Am1

hg up 5
hg merge 4    # try to merge default into br again

exit 0