Simple bash functions library to say something to TeamCity. See https://confluence.jetbrains.com/display/TCDL/Build+Script+Interaction+with+TeamCity

service-messages.sh

#!/usr/bin/env bash

function __tc_encode {
    # Only unicode characters are not supported
    echo -n "$1" | sed "s/\([|']\)/\|\1/g; s/\[/\|\[/g; s/\]/\|\]/g; s/\r/\|r/g;" | sed ':a;N;$!ba;s/\n/|n/g'
}
function __tc_message {
    echo "##teamcity[message text='$(__tc_encode "$2")' status='${1:-NORMAL}']"
}
function __tc_simple {
    echo "##teamcity[$1 '$(__tc_encode "$2")']"
}

function tc_message {
    __tc_message NORMAL "$1"
}
function tc_message_failure {
    __tc_message FAILURE "$1"
}
function tc_message_error {
    __tc_message ERROR "$1"
}
function tc_message_warning {
    __tc_message WARNING "$1"
}
function tc_message_normal {
    __tc_message NORMAL "$1"
}

function tc_block_open {
    echo "##teamcity[blockOpened name='$(__tc_encode "$1")']"
}
function tc_block_close {
    echo "##teamcity[blockClosed name='$(__tc_encode "$1")']"
}


function tc_progress {
    __tc_simple 'progressMessage' "$1"
}
function tc_progress_start {
    __tc_simple 'progressStart' "$1"
}
function tc_progress_finish {
    __tc_simple 'progressFinish' "$1"
}

# $1 - text (required)
# $2 - identity (optional)
function tc_build_problem {
    if [ "$2" = "" ]; then
        echo "##teamcity[buildProblem description='$(__tc_encode "$1")']"
    else
        echo "##teamcity[buildProblem description='$(__tc_encode "$1")' identity='$(__tc_encode "$2")']"
    fi
}

# $1 - text (required)
# $2 - status (optional)
function tc_build_status {
    if [ "$2" = "" ]; then
        echo "##teamcity[buildStatus text='$(__tc_encode "$1")']"
    else
        echo "##teamcity[buildStatus text='$(__tc_encode "$1")' status='$(__tc_encode "$2")']"
    fi
}

function tc_build_number {
    __tc_simple 'buildNumber' "$1"
}

function tc_set_parameter {
    echo "##teamcity[setParameter name='$(__tc_encode "$1")' value='$(__tc_encode "$2")']"
}

test.sh

#!/usr/bin/env bash


source service-messages.sh

tc_block_open "Test block"
tc_message "Test message"
tc_message "$(echo -e "Test\nmultiline\n\rmessage")"
tc_message "Test\nnon-multiline\n\rmessage"
tc_message "Test
multiline
message"
tc_block_close 'Test block'

tc_block_open 'Test "quoted"'
tc_message "Test escaping ' | [ ]"
tc_message "Test non-escaping \ / { }"
tc_block_close 'Test "quoted"'

TODO: Support prefixless functions definition. Could be done via parsing '$1', e.g. source service-messages.sh, source service-messages.sh tc_, etc.