tests/test-mv-cp-st-diff

verify: fix "missing revlog!" errors for revlog format v0 and add test

With revlog format v0 the .d files are empty if the only revision stored is an
empty file. Since Mercurial can no longer create format v0 repositories, but
still use it, add a script which creates a repository with a single empty file.
This can be used in other tests if wanted.

#!/bin/sh

add()
{
    echo $2 >> $1
}

hg init t
cd t

# set up a boring main branch
add a a
hg add a
mkdir x
add x/x x
hg add x/x
hg ci -m0

add a m1
hg ci -m1

add a m2
add x/y y1
hg add x/y
hg ci -m2
cd ..

show()
{
    echo "- $2: $1"
    hg st -C $1
    echo
    hg diff --git $1
    echo
}

count=0
# make a new branch and get diff/status output
# $1 - first commit
# $2 - second commit
# $3 - working dir action
# $4 - test description
tb()
{
    hg clone t t2 ; cd t2
    hg co -q -C 0

    add a $count
    count=`expr $count + 1`
    hg ci -m "t0"
    $1
    hg ci -m "t1"
    $2
    hg ci -m "t2"
    $3

    echo "** $4 **"
    echo "** $1 / $2 / $3"
    show "" "working to parent"
    show "--rev 0" "working to root"
    show "--rev 2" "working to branch"
    show "--rev 0 --rev ." "root to parent"
    show "--rev . --rev 0" "parent to root"
    show "--rev 2 --rev ." "branch to parent"
    show "--rev . --rev 2" "parent to branch"
    echo
    cd ..
    rm -rf t2
}


tb "add a a1" "add a a2" "hg mv a b" "rename in working dir"
tb "add a a1" "add a a2" "hg cp a b" "copy in working dir" 
tb "hg mv a b" "add b b1" "add b w" "single rename"
tb "hg cp a b" "add b b1" "add a w" "single copy"
tb "hg mv a b" "hg mv b c" "hg mv c d" "rename chain"
tb "hg cp a b" "hg cp b c" "hg cp c d" "copy chain"
tb "add a a1" "hg mv a b" "hg mv b a" "circular rename"

tb "hg mv x y" "add y/x x1" "add y/x x2" "directory move"

# Cannot implement unrelated branch with tb
echo '% testing copies with unrelated branch'
hg init unrelated
cd unrelated
add a a
hg ci -Am adda
hg mv a b
hg ci -m movea
hg up -C null
add a a
hg ci -Am addunrelateda
echo '% unrelated branch diff'
hg diff --git -r 2 -r 1
cd ..