#!/bin/sh
#
# Copyright (c) 2007 Johannes E. Schindelin
#

test_description='Test commit notes index (expensive!)'

. ./test-lib.sh

test -z "$GIT_NOTES_TIMING_TESTS" && {
        say Skipping timing tests
        test_done
        exit
}

create_repo () {
        number_of_commits=$1
        nr=0
        parent=
        test -d .git || {
        git init &&
        tree=$(git write-tree) &&
        while [ $nr -lt $number_of_commits ]; do
                test_tick &&
                commit=$(echo $nr | git commit-tree $tree $parent) ||
                        return
                parent="-p $commit"
                nr=$(($nr+1))
        done &&
        git update-ref refs/heads/master $commit &&
        {
                export GIT_INDEX_FILE=.git/temp;
                git rev-list HEAD | cat -n | sed "s/^[  ][      ]*/ /g" |
                while read nr sha1; do
                        blob=$(echo note $nr | git hash-object -w --stdin) &&
                        echo $sha1 | sed "s/^/0644 $blob 0      /"
                done | git update-index --index-info &&
                tree=$(git write-tree) &&
                test_tick &&
                commit=$(echo notes | git commit-tree $tree) &&
                git update-ref refs/notes/commits $commit
        } &&
        git config core.notesRef refs/notes/commits
        }
}

test_notes () {
        count=$1 &&
        git config core.notesRef refs/notes/commits &&
        git log | grep "^    " > output &&
        i=1 &&
        while [ $i -le $count ]; do
                echo "    $(($count-$i))" &&
                echo "    note $i" &&
                i=$(($i+1));
        done > expect &&
        git diff expect output
}

cat > time_notes << \EOF
        mode=$1
        i=1
        while [ $i -lt $2 ]; do
                case $1 in
                no-notes)
                        export GIT_NOTES_REF=non-existing
                ;;
                notes)
                        unset GIT_NOTES_REF
                ;;
                esac
                git log >/dev/null
                i=$(($i+1))
        done
EOF

time_notes () {
        for mode in no-notes notes
        do
                echo $mode
                /usr/bin/time sh ../time_notes $mode $1
        done
}

for count in 10 100 1000 10000; do

        mkdir $count
        (cd $count;

        test_expect_success "setup $count" "create_repo $count"

        test_expect_success 'notes work' "test_notes $count"

        test_expect_success 'notes timing' "time_notes 100"
        )
done

test_done