#!/bin/sh
#
# test that apt-get update is transactional
# 
set -e

avoid_ims_hit() {
    touch -d '+1hour' aptarchive/dists/unstable/main/binary-i386/Packages*
    touch -d '+1hour' aptarchive/dists/unstable/main/source/Sources*
    touch -d '+1hour' aptarchive/dists/unstable/*Release*

    touch -d '-1hour' rootdir/var/lib/apt/lists/*
}

create_fresh_archive()
{
    rm -rf aptarchive/*
    rm -f rootdir/var/lib/apt/lists/_* rootdir/var/lib/apt/lists/partial/*

    insertpackage 'unstable' 'old' 'all' '1.0'

    setupaptarchive
}

add_new_package() {
    insertpackage "unstable" "new" "all" "1.0"
    insertsource "unstable" "new" "all" "1.0"

    setupaptarchive --no-update

    avoid_ims_hit
}

break_repository_sources_index() {
    printf "xxx" > $APTARCHIVE/dists/unstable/main/source/Sources
    gzip -c $APTARCHIVE/dists/unstable/main/source/Sources > \
            $APTARCHIVE/dists/unstable/main/source/Sources.gz
    avoid_ims_hit
}

test_inrelease_to_new_inrelease() {
    msgmsg "Test InRelease to new InRelease works fine"
    create_fresh_archive
    testequal "old/unstable 1.0 all" apt list -q

    add_new_package

    testsuccess aptget update -o Debug::Acquire::Transaction=1

    testequal "new/unstable 1.0 all
old/unstable 1.0 all" apt list -q
}

test_inrelease_to_broken_hash_reverts_all() {
    msgmsg "Test InRelease to broken InRelease reverts everything"
    create_fresh_archive
    add_new_package
    # break the Sources file
    break_repository_sources_index

    # test the error condition
    testequal "W: Failed to fetch file:${APTARCHIVE}/dists/unstable/main/source/Sources  Hash Sum mismatch

E: Some index files failed to download. They have been ignored, or old ones used instead." aptget update -qq
    # ensure that the Packages file is also rolled back
    testequal "E: Unable to locate package new" aptget install new -s -qq
}

test_inreleae_to_valid_release() {
    msgmsg "Test InRelease to valid Release"
    create_fresh_archive
    add_new_package
    # switch to a unsinged repo now
    rm $APTARCHIVE/dists/unstable/InRelease
    rm $APTARCHIVE/dists/unstable/Release.gpg
    avoid_ims_hit

    # update fails
    testequal "E: The repository 'file: unstable Release.gpg' is no longer signed." aptget update -qq

    # test that we can install the new packages but do no longer have a sig
    testsuccess aptget install old -s
    testfailure aptget install new -s
    testsuccess ls $ROOTDIR/var/lib/apt/lists/*_InRelease
    testfailure ls $ROOTDIR/var/lib/apt/lists/*_Release
}

test_inreleae_to_release_reverts_all() {
    msgmsg "Test InRelease to broken Release reverts everything"
    create_fresh_archive

    # switch to a unsinged repo now
    add_new_package
    rm $APTARCHIVE/dists/unstable/InRelease
    rm $APTARCHIVE/dists/unstable/Release.gpg
    # break it
    break_repository_sources_index

    # ensure error
    testequal "E: The repository 'file: unstable Release.gpg' is no longer signed." aptget update -qq # -o Debug::acquire::transaction=1

    # ensure that the Packages file is also rolled back
    testsuccess aptget install old -s
    testfailure aptget install new -s
    testsuccess ls $ROOTDIR/var/lib/apt/lists/*_InRelease
    testfailure ls $ROOTDIR/var/lib/apt/lists/*_Release
}

test_unauthenticated_to_invalid_inrelease() {
    msgmsg "Test UnAuthenticated to invalid InRelease reverts everything"
    create_fresh_archive
    rm -rf rootdir/var/lib/apt/lists/*
    rm $APTARCHIVE/dists/unstable/InRelease
    rm $APTARCHIVE/dists/unstable/Release.gpg
    avoid_ims_hit
    
    testsuccess aptget update -qq --allow-insecure-repositories
    testequal "WARNING: The following packages cannot be authenticated!
  old
E: There are problems and -y was used without --force-yes" aptget install -qq -y old
    
    # go to authenticated but not correct
    add_new_package
    break_repository_sources_index

    testequal "W: Failed to fetch file:$APTARCHIVE/dists/unstable/main/source/Sources  Hash Sum mismatch

E: Some index files failed to download. They have been ignored, or old ones used instead." aptget update -qq

    testfailure ls rootdir/var/lib/apt/lists/*_InRelease
    testequal "WARNING: The following packages cannot be authenticated!
  old
E: There are problems and -y was used without --force-yes" aptget install -qq -y old
}

test_inrelease_to_unauth_inrelease() {
    msgmsg "Test InRelease to InRelease without sig"
    create_fresh_archive
    signreleasefiles 'Marvin Paranoid'
    avoid_ims_hit
    
    testequal "W: An error occurred during the signature verification. The repository is not updated and the previous index files will be used. GPG error: file: unstable InRelease: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY E8525D47528144E2

W: Failed to fetch file:$APTARCHIVE/dists/unstable/InRelease  

W: Some index files failed to download. They have been ignored, or old ones used instead." aptget update -qq

    testsuccess ls rootdir/var/lib/apt/lists/*_InRelease
}

test_inrelease_to_broken_gzip() {
    msgmsg "Test InRelease to broken gzip"
    create_fresh_archive
    # append junk at the end of the gzip, this
    echo "lala" >> $APTARCHIVE/dists/unstable/main/source/Sources.gz
    # remove uncompressed file, otherwise apt will just fallback fetching
    # that
    rm $APTARCHIVE/dists/unstable/main/source/Sources
    avoid_ims_hit

    testfailure aptget update
}

TESTDIR=$(readlink -f $(dirname $0))
. $TESTDIR/framework

setupenvironment
configarchitecture "i386"

# setup the archive and ensure we have a single package that installs fine
setupaptarchive
APTARCHIVE=$(readlink -f ./aptarchive)
ROOTDIR=${TMPWORKINGDIRECTORY}/rootdir
APTARCHIVE_LISTS="$(echo $APTARCHIVE | tr "/" "_" )"

# test the following cases:
# - InRelease -> broken InRelease revert to previous state 
# - empty lists dir and broken remote leaves nothing on the system
# - InRelease -> hashsum mismatch for one file reverts all files to previous state
# - Release/Release.gpg -> hashsum mismatch
# - InRelease -> Release with hashsum mismatch revert entire state and kills Release
# - Release -> InRelease with broken Sig/Hash removes InRelease
# going from Release/Release.gpg -> InRelease and vice versa
# - unauthenticated -> invalid InRelease

# stuff to do:
# - ims-hit 
# - gzip-index tests

test_inrelease_to_new_inrelease
test_inrelease_to_broken_hash_reverts_all
test_inreleae_to_valid_release
test_inreleae_to_release_reverts_all
test_unauthenticated_to_invalid_inrelease
test_inrelease_to_unauth_inrelease
test_inrelease_to_broken_gzip