#!/usr/bin/env bash

# Test of conflict resolution for a "chain" of conflicts
# i.e. where (only) the adjacent patches conflict.

. lib

# Note that this test fails for darcs-2 format.
skip-formats darcs-2

# Establish our baseline:

rm -rf C
darcs init C
cd C
cat <<EOF > f
a
b
c
d
e
f
EOF
darcs record -lam "base"
cd ..

# Record hunk patches p1..p5 in separate repos,
# such that (only) adjacent patches conflict

rm -rf R1
darcs clone -q C R1
cd R1
sed -i -e 's/[ab]/&1/' f
darcs record -am 'p1'
cd ..

rm -rf R2
darcs clone -q C R2
cd R2
sed -i -e 's/[bc]/&2/' f
darcs record -am 'p2'
cd ..

rm -rf R3
darcs clone -q C R3
cd R3
sed -i -e 's/[cd]/&3/' f
darcs record -am 'p3'
cd ..

rm -rf R4
darcs clone -q C R4
cd R4
sed -i -e 's/[de]/&4/' f
darcs record -am 'p4'
cd ..

rm -rf R5
darcs clone -q C R5
cd R5
sed -i -e 's/[ef]/&5/' f
darcs record -am 'p5'
cd ..

# Pull them all into the common context

cd C
darcs pull -a ../R*

# For darcs-3 patches we do not merge non-conflicting
# alternatives.

cat <<EOF > f.darcs-3
v v v v v v v
a
b
c
d
e
f
=============
a
b
c
d
e5
f5
*************
a
b
c
d4
e4
f
*************
a
b
c3
d3
e
f
*************
a
b2
c2
d
e
f
*************
a1
b1
c
d
e
f
^ ^ ^ ^ ^ ^ ^
EOF

# The maximal non-conflicting subsets are:
#  {p1, p3, p5}, {p1, p4}, {p2, p4} {p2, p5}
# They are what darcs displays as alternatives to the baseline
# for darcs-1 patches.

cat <<EOF > f.darcs-1
v v v v v v v
a
b
c
d
e
f
=============
a
b2
c2
d
e5
f5
*************
a
b2
c2
d4
e4
f
*************
a1
b1
c
d4
e4
f
*************
a1
b1
c3
d3
e5
f5
^ ^ ^ ^ ^ ^ ^
EOF

diff f f.$format >&2

cd ..