Azure Devops Set Build Number for Master & PRs

azure_devops_update_build_number.sh

#!/bin/bash

# Script to set build number in Azure Devops

# We want build number of the following form:

# "build master efab0 20190505 12:12"
# "build pr feature/foo efab0 20190505 12:12"

# Builtin Azure Devops build numbering is insufficient, so we override with this script.

date_str=$(date "+%Y%m%d %H%M")

if [[ -z "${SYSTEM_PULLREQUEST_SOURCEBRANCH}" ]]; then
    # master
    sha=${BUILD_SOURCEVERSION:0:5}
    build_number="build of ${BUILD_SOURCEBRANCHNAME} ${sha} ${date_str}"
else
    # pr
    sha=${SYSTEM_PULLREQUEST_SOURCECOMMITID:0:5}
    build_number="build of pr ${SYSTEM_PULLREQUEST_SOURCEBRANCH} ${sha} ${date_str}"
fi

# TF209010: The build number format build  master ded3a 20190628 08:22 contains invalid character(s), is too long, or ends with '.'. The maximum length of a build number is 255 characters. Characters which are not allowed include '"', '/', ':', '<', '>', '\', '|', '?', '@', and '*'.
# get rid of forward slashes (some PR's have this, e.g. feature/foobar
cleaned_build_number=$(sed "s/\//_/g" <<<"$build_number")

# see: https://docs.microsoft.com/en-us/azure/devops/pipelines/scripts/logging-commands?view=azure-devops&tabs=bash
# see: https://github.com/microsoft/azure-pipelines-tasks/blob/master/docs/authoring/commands.md

echo "##vso[build.updatebuildnumber]${cleaned_build_number}"