#!/bin/sh
#
# Copyright (c) 2007 Lars Hjemli
#

test_description='Basic porcelain support for submodules

This test tries to verify basic sanity of the init, update and status
subcommands of git-submodule.
'

. ./test-lib.sh

#
# Test setup:
#  -create a repository in directory lib
#  -add a couple of files
#  -add directory lib to 'superproject', this creates a DIRLINK entry
#  -add a couple of regular files to enable testing of submodule filtering
#  -mv lib subrepo
#  -add an entry to .gitmodules for submodule 'example'
#
test_expect_success 'Prepare submodule testing' '
        : > t &&
        git-add t &&
        git-commit -m "initial commit" &&
        git branch initial HEAD &&
        mkdir lib &&
        cd lib &&
        git init &&
        echo a >a &&
        git add a &&
        git-commit -m "submodule commit 1" &&
        git-tag -a -m "rev-1" rev-1 &&
        rev1=$(git rev-parse HEAD) &&
        if test -z "$rev1"
        then
                echo "[OOPS] submodule git rev-parse returned nothing"
                false
        fi &&
        cd .. &&
        echo a >a &&
        echo z >z &&
        git add a lib z &&
        git-commit -m "super commit 1" &&
        mv lib .subrepo &&
        GIT_CONFIG=.gitmodules git config submodule.example.url git://example.com/lib.git
'

test_expect_success 'status should fail for unmapped paths' '
        if git-submodule status
        then
                echo "[OOPS] submodule status succeeded"
                false
        elif ! GIT_CONFIG=.gitmodules git config submodule.example.path lib
        then
                echo "[OOPS] git config failed to update .gitmodules"
                false
        fi
'

test_expect_success 'status should only print one line' '
        lines=$(git-submodule status | wc -l) &&
        test $lines = 1
'

test_expect_success 'status should initially be "missing"' '
        git-submodule status | grep "^-$rev1"
'

test_expect_success 'init should register submodule url in .git/config' '
        git-submodule init &&
        url=$(git config submodule.example.url) &&
        if test "$url" != "git://example.com/lib.git"
        then
                echo "[OOPS] init succeeded but submodule url is wrong"
                false
        elif ! git config submodule.example.url ./.subrepo
        then
                echo "[OOPS] init succeeded but update of url failed"
                false
        fi
'

test_expect_success 'update should fail when path is used by a file' '
        echo "hello" >lib &&
        if git-submodule update
        then
                echo "[OOPS] update should have failed"
                false
        elif test "$(cat lib)" != "hello"
        then
                echo "[OOPS] update failed but lib file was molested"
                false
        else
                rm lib
        fi
'

test_expect_success 'update should fail when path is used by a nonempty directory' '
        mkdir lib &&
        echo "hello" >lib/a &&
        if git-submodule update
        then
                echo "[OOPS] update should have failed"
                false
        elif test "$(cat lib/a)" != "hello"
        then
                echo "[OOPS] update failed but lib/a was molested"
                false
        else
                rm lib/a
        fi
'

test_expect_success 'update should work when path is an empty dir' '
        rm -rf lib &&
        mkdir lib &&
        git-submodule update &&
        head=$(cd lib && git rev-parse HEAD) &&
        if test -z "$head"
        then
                echo "[OOPS] Failed to obtain submodule head"
                false
        elif test "$head" != "$rev1"
        then
                echo "[OOPS] Submodule head is $head but should have been $rev1"
                false
        fi
'

test_expect_success 'status should be "up-to-date" after update' '
        git-submodule status | grep "^ $rev1"
'

test_expect_success 'status should be "modified" after submodule commit' '
        cd lib &&
        echo b >b &&
        git add b &&
        git-commit -m "submodule commit 2" &&
        rev2=$(git rev-parse HEAD) &&
        cd .. &&
        if test -z "$rev2"
        then
                echo "[OOPS] submodule git rev-parse returned nothing"
                false
        fi &&
        git-submodule status | grep "^+$rev2"
'

test_expect_success 'the --cached sha1 should be rev1' '
        git-submodule --cached status | grep "^+$rev1"
'

test_expect_success 'update should checkout rev1' '
        git-submodule update &&
        head=$(cd lib && git rev-parse HEAD) &&
        if test -z "$head"
        then
                echo "[OOPS] submodule git rev-parse returned nothing"
                false
        elif test "$head" != "$rev1"
        then
                echo "[OOPS] init did not checkout correct head"
                false
        fi
'

test_expect_success 'status should be "up-to-date" after update' '
        git-submodule status | grep "^ $rev1"
'

test_expect_success 'checkout superproject with subproject already present' '
        git-checkout initial &&
        git-checkout master
'

test_expect_success 'apply submodule diff' '
        git branch second &&
        (
                cd lib &&
                echo s >s &&
                git add s &&
                git commit -m "change subproject"
        ) &&
        git update-index --add lib &&
        git-commit -m "change lib" &&
        git-format-patch -1 --stdout >P.diff &&
        git checkout second &&
        git apply --index P.diff &&
        D=$(git diff --cached master) &&
        test -z "$D"
'

test_done