#!/bin/sh
# Verify the new libconfuse config format: block -> legacy translation,
# per-file format detection (legacy files keep working alongside), and
# that a typo in a new-format file is rejected with an error instead of
# being fed to the legacy parser.
set -eu

TEST_DIR=$(dirname "$0")

# shellcheck disable=SC2034
# A /etc/finit.conf entirely in the new format, seeded before Finit
# boots.  Mixing the two formats in one file is not supported, so the
# probe that reads the variable back is a block too.
BOOTSTRAP="environment {\n\
    CONF_FORMAT_VAR = \"blockfmt\"\n\
}\n\
run envprobe {\n\
    runlevel    = \"S\"\n\
    description = \"Probe\"\n\
    command     = \"/bin/touch /tmp/envprobe-\$CONF_FORMAT_VAR\"\n\
}"

test_teardown()
{
    say "Running test teardown."
    run "rm -f $FINIT_CONF /tmp/envprobe-*"
    run "rm -f $FINIT_RCSD/legacy-side.conf"
}

# Write a service block, $1 is the description key, to exercise both
# the canonical spelling and a typo.  $2, if given, is prepended as a
# root-level line.
write_svc()
{
    run "echo '${2:-}service service.sh {'          >  $FINIT_CONF"
    run "echo '    $1 = \"Test service\"'           >> $FINIT_CONF"
    run "echo '    command = \"service.sh\"'        >> $FINIT_CONF"
    run "echo '}'                                   >> $FINIT_CONF"
}

# shellcheck source=/dev/null
. "$TEST_DIR/lib/setup.sh"

say 'A new-format /etc/finit.conf booted the system, environment {} applied'
retry 'assert_file_exists /tmp/envprobe-blockfmt'

# Reaching runlevel 2 reloads the .conf files, and conf_reset_env()
# clears every tracked variable first.  Gating environment {} on
# bootstrap would therefore drop it here, which is what serv -e
# catches: it exits unless the variable still holds the value.
say 'Global env survives the runlevel change and a reload, via the env {} alias'
run "echo 'env {'                                  >  $FINIT_CONF"
run "echo '    CONF_FORMAT_VAR = \"blockfmt\"'     >> $FINIT_CONF"
run "echo '}'                                      >> $FINIT_CONF"
run "echo 'service serv {'                         >> $FINIT_CONF"
run "echo '    description = \"Verify env\"'       >> $FINIT_CONF"
run "echo '    command = \"serv -np -e CONF_FORMAT_VAR:blockfmt\"' >> $FINIT_CONF"
run "echo '}'                                      >> $FINIT_CONF"
run "initctl reload"

retry 'assert_num_children 1 serv'
assert_desc "Verify env" serv

say "Add new-format service block in $FINIT_CONF"
run "echo 'service service.sh {'                    >  $FINIT_CONF"
run "echo '    description = \"Test service\"'     >> $FINIT_CONF"
run "echo '    runlevel    = \"2345\"'             >> $FINIT_CONF"
run "echo '    kill        = 20'                   >> $FINIT_CONF"
run "echo '    log         = true'                 >> $FINIT_CONF"
# Exercises the cgroup translation path.  Whether the group is really
# joined cannot be asserted here, cgroup_avail() is false inside the
# test namespace, so initctl reports no cgroup at all.
run "echo '    cgroup user {}'                     >> $FINIT_CONF"
run "echo '    command     = \"service.sh\"'       >> $FINIT_CONF"
run "echo '}'                                      >> $FINIT_CONF"

say 'Reload Finit'
run "initctl reload"

retry 'assert_num_children 1 service.sh'
assert_desc "Test service" service.sh

say 'Stop the service'
run "initctl stop service.sh"

retry 'assert_num_children 0 service.sh'

say 'Start the service again'
run "initctl start service.sh"

retry 'assert_num_children 1 service.sh'

say 'Both formats side by side: legacy file in finit.d/, block file in finit.conf'
run "echo 'task [2345] name:legacyside /bin/touch /tmp/legacyside -- Legacy side' > $FINIT_RCSD/legacy-side.conf"
run "initctl reload"

retry 'assert_file_exists /tmp/legacyside'
retry 'assert_num_children 1 service.sh'
assert_desc "Legacy side" legacyside

run "rm -f $FINIT_RCSD/legacy-side.conf /tmp/legacyside"
run "initctl reload"

say 'Round-trip: switch to the legacy one-liner equivalent'
run "echo 'service [2345] name:service.sh kill:20 log service.sh -- Test service' > $FINIT_CONF"
run "initctl reload"

retry 'assert_num_children 1 service.sh'
assert_desc "Test service" service.sh

# A rejected file must not reach the legacy parser, which registers a
# bogus unstartable service per line.  assert_num_children cannot see
# that, the bogus service has no children either.
say 'Typo inside a block must be rejected, not fed to legacy parser'
write_svc descriptoin
run "initctl reload"

retry 'assert_num_children 0 service.sh'
assert_num_services 0 service.sh

say 'Typo at root level must be rejected too, same as inside a block'
write_svc description 'hostnam = \"typo\"\n'
run "initctl reload"

retry 'assert_num_children 0 service.sh'
assert_num_services 0 service.sh

say 'A clean new-format file still loads after the rejected ones'
write_svc description
run "initctl reload"

retry 'assert_num_children 1 service.sh'
assert_desc "Test service" service.sh