#!/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 --no-update
}

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

    setupaptarchive --no-update "$@"
}

break_repository_sources_index() {
    printf 'xxx' > "$APTARCHIVE/dists/unstable/main/source/Sources"
    compressfile "$APTARCHIVE/dists/unstable/main/source/Sources" "$@"
}

start_with_good_inrelease() {
    create_fresh_archive
    testsuccess aptget update
    listcurrentlistsdirectory > lists.before
    testsuccessequal 'old/unstable 1.0 all' apt list -qq
}

test_inrelease_to_new_inrelease() {
    msgmsg 'Test InRelease to new InRelease works fine'
    start_with_good_inrelease

    add_new_package '+1hour'
    testsuccess aptget update -o Debug::Acquire::Transaction=1
    testsuccessequal 'new/unstable 1.0 all
old/unstable 1.0 all' apt list -qq
}

test_inrelease_to_broken_hash_reverts_all() {
    msgmsg 'Test InRelease to broken InRelease reverts everything'
    start_with_good_inrelease

    add_new_package '+1hour'
    # break the Sources file
    break_repository_sources_index '+1hour'

    # test the error condition
    testfailureequal "W: Failed to fetch file:${APTARCHIVE}/dists/unstable/main/source/Sources.gz  Hash Sum mismatch
E: Some index files failed to download. They have been ignored, or old ones used instead." aptget update -qq
    # ensure that the Packages file is also rolled back
    testfileequal lists.before "$(listcurrentlistsdirectory)"
    testfailureequal "E: Unable to locate package new" aptget install new -s -qq
}

test_inrelease_to_valid_release() {
    msgmsg 'Test InRelease to valid Release'
    start_with_good_inrelease

    add_new_package '+1hour'
    # switch to a unsigned repo now
    rm "$APTARCHIVE/dists/unstable/InRelease"
    rm "$APTARCHIVE/dists/unstable/Release.gpg"

    # update fails
    testfailureequal "E: The repository 'file:${APTARCHIVE} unstable Release' is no longer signed." aptget update -qq

    # test that security downgrade was not successful
    testfileequal lists.before "$(listcurrentlistsdirectory)"
    testsuccess aptget install old -s
    testfailure aptget install new -s
    testnotempty find "${ROOTDIR}/var/lib/apt/lists" -name '*_InRelease'
    testempty find "${ROOTDIR}/var/lib/apt/lists" -name '*_Release'
}

test_inrelease_to_release_reverts_all() {
    msgmsg 'Test InRelease to broken Release reverts everything'
    start_with_good_inrelease

    # switch to a unsigned repo now
    add_new_package '+1hour'
    rm "$APTARCHIVE/dists/unstable/InRelease"
    rm "$APTARCHIVE/dists/unstable/Release.gpg"

    # break it
    break_repository_sources_index '+1hour'

    # ensure error
    testfailureequal "E: The repository 'file:${APTARCHIVE} unstable Release' is no longer signed." aptget update -qq # -o Debug::acquire::transaction=1

    # ensure that the Packages file is also rolled back
    testfileequal lists.before "$(listcurrentlistsdirectory)"
    testsuccess aptget install old -s
    testfailure aptget install new -s
    testnotempty find "${ROOTDIR}/var/lib/apt/lists" -name '*_InRelease'
    testempty find "${ROOTDIR}/var/lib/apt/lists" -name '*_Release'
}

test_unauthenticated_to_invalid_inrelease() {
    msgmsg 'Test UnAuthenticated to invalid InRelease reverts everything'
    create_fresh_archive
    rm "$APTARCHIVE/dists/unstable/InRelease"
    rm "$APTARCHIVE/dists/unstable/Release.gpg"

    testwarning aptget update --allow-insecure-repositories
    listcurrentlistsdirectory > lists.before
    testfailureequal "WARNING: The following packages cannot be authenticated!
  old
E: There were unauthenticated packages and -y was used without --allow-unauthenticated" aptget install -qq -y old

    # go to authenticated but not correct
    add_new_package '+1hour'
    break_repository_sources_index '+1hour'

    testfailureequal "W: Failed to fetch file:$APTARCHIVE/dists/unstable/main/source/Sources.gz  Hash Sum mismatch
E: Some index files failed to download. They have been ignored, or old ones used instead." aptget update -qq

    testfileequal lists.before "$(listcurrentlistsdirectory)"
    testempty find "${ROOTDIR}/var/lib/apt/lists" -maxdepth 1 -name '*_InRelease'
    testfailureequal "WARNING: The following packages cannot be authenticated!
  old
E: There were unauthenticated packages and -y was used without --allow-unauthenticated" aptget install -qq -y old
}

test_inrelease_to_unauth_inrelease() {
    msgmsg 'Test InRelease to InRelease without good sig'
    start_with_good_inrelease

    signreleasefiles 'Marvin Paranoid'

    testwarningequal "W: An error occurred during the signature verification. The repository is not updated and the previous index files will be used. GPG error: file:${APTARCHIVE} unstable InRelease: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY E8525D47528144E2
W: Failed to fetch file:$APTARCHIVE/dists/unstable/InRelease  The following signatures couldn't be verified because the public key is not available: NO_PUBKEY E8525D47528144E2
W: Some index files failed to download. They have been ignored, or old ones used instead." aptget update -qq

    testfileequal lists.before "$(listcurrentlistsdirectory)"
    testnotempty find "${ROOTDIR}/var/lib/apt/lists" -name '*_InRelease'
}

test_inrelease_to_broken_gzip() {
    msgmsg "Test InRelease to broken gzip"
    start_with_good_inrelease

    break_repository_sources_index '+1hour'
    generatereleasefiles '+2hours'
    signreleasefiles

    # append junk at the end of the compressed file
    echo "lala" >> "$APTARCHIVE/dists/unstable/main/source/Sources.gz"
    touch -d '+2min' "$APTARCHIVE/dists/unstable/main/source/Sources.gz"
    # remove uncompressed file to avoid fallback
    rm "$APTARCHIVE/dists/unstable/main/source/Sources"

    testfailure aptget update
    testsuccess grep 'Hash Sum mismatch' rootdir/tmp/testfailure.output
    testfileequal lists.before "$(listcurrentlistsdirectory)"
}

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_inrelease_to_valid_release
test_inrelease_to_release_reverts_all
test_unauthenticated_to_invalid_inrelease
test_inrelease_to_unauth_inrelease
test_inrelease_to_broken_gzip
