#!/bin/sh

# test for issue #6:

# editing a changeset without any actual change would corrupt the repository

. "$TESTDIR/histedit-helpers.sh"

cat >> $HGRCPATH <<EOF

[extensions]

graphlog=

histedit=

EOF

initrepo ()

{

    dir="$1"

    comment="$2"

    if [ -n "${comment}" ]; then

        echo % ${comment}

        echo % ${comment} | sed 's:.:-:g'

    fi

    hg init ${dir}

    cd ${dir}

    for x in a b c d e f ; do

        echo $x > $x

        hg add $x

        hg ci -m $x

    done

}

geneditor ()

{

    # generate an editor script for selecting changesets to be edited

    choice=$1  # changesets that should be edited (using sed line ranges)

    cat <<EOF | sed 's:^....::'

    #!/bin/sh

    # editing the rules, replacing 'pick' with 'edit' for the chosen lines

    sed '${choice}s:^pick:edit:' \$1 > \${1}.tmp

    mv \${1}.tmp \$1

    # displaying the resulting rules, minus comments and empty lines

    sed '/^#/d;/^$/d;s:^:| :' \$1 >&2

EOF

}

startediting ()

{

    # begin an editing session

    choice="$1"  # changesets that should be edited

    number="$2"  # number of changesets considered (from tip)

    comment="$3"

    geneditor "${choice}" > edit.sh

    chmod +x edit.sh

    echo % start editing the history ${comment}

    HGEDITOR=./edit.sh hg histedit -- -${number} 2>&1 | fixbundle

}

continueediting ()

{

    # continue an edit already in progress

    editor="$1"  # message editor when finalizing editing

    comment="$2"

    echo % finalize changeset editing ${comment}

    HGEDITOR=${editor} hg histedit --continue 2>&1 | fixbundle

}

graphlog ()

{

    comment="${1:-log}"

    echo % "${comment}"

    hg glog --template '{rev} {node} \"{desc|firstline}\"\n'

}

initrepo r1 "test editing with no change"

graphlog "log before editing"

startediting 2 3 "(not changing anything)" # edit the 2nd of 3 changesets

continueediting true "(leaving commit message unaltered)"

echo "% check state of working copy"

hg id

graphlog "log after history editing"

cd ..

initrepo r2 "test editing with no change, then abort"

graphlog "log before editing"

startediting 1,2 3 "(not changing anything)" # edit the 1st two of 3 changesets

continueediting true "(leaving commit message unaltered)"

graphlog "log after first edit"

echo % abort editing session

hg histedit --abort 2>&1 | fixbundle

graphlog "log after abort"

echo % EOF