Use semantic versioning in TeamCity builds (master vs. develop)

default.proj

<?xml version="1.0" encoding="utf-8"?>
<Project DefaultTargets="All" InitialTargets="_SetVersion" xmlns="http://schemas.microsoft.com/developer/msbuild/2003" ToolsVersion="4.0">
    <PropertyGroup>
        <!--
            Version is controlled through two settings:
            - $(SemanticVersion) holds the logical three-segment semantic version.
            - An optional $(SemanticQualifier) environment variable/property
              indicates if the build is pre-release. Use the form "-beta{0}" like
              String.Format(); the current build date/time gets inserted as arg 0.
        -->
        <SemanticVersion>1.0.0</SemanticVersion>
    </PropertyGroup>
    <Import Project="$(MSBuildProjectDirectory)\toolset\msbuildcommunitytasks\MSBuild.Community.Tasks.Targets"/>
    <Target Name="_SetVersion">
        <PropertyGroup>
            <DateNow>$([System.DateTime]::UtcNow.ToString(yyyyMMddHHmmss))</DateNow>
            <QualifiedSemanticVersion Condition="'$(SemanticQualifier)' == ''">$(SemanticVersion)</QualifiedSemanticVersion>
            <QualifiedSemanticVersion Condition="'$(SemanticQualifier)' != ''">$(SemanticVersion)$([System.String]::Format($(SemanticQualifier), $(DateNow)))</QualifiedSemanticVersion>
            <BuildLabel Condition="'$(BuildLabel)' == '' and '$(BUILD_VCS_NUMBER)' != '' and '$(SemanticQualifier)' == ''">$(QualifiedSemanticVersion).$(DateNow)</BuildLabel>
            <BuildLabel Condition="'$(BuildLabel)' == '' and '$(BUILD_VCS_NUMBER)' != '' and '$(SemanticQualifier)' != ''">$(QualifiedSemanticVersion)</BuildLabel>
            <BuildLabel Condition="'$(BuildLabel)' == '' and '$(BUILD_VCS_NUMBER)' == ''">0.0.0.0</BuildLabel>
        </PropertyGroup>
        <Message Text="##teamcity[buildNumber '$(BuildLabel)']" Condition="'$(BUILD_VCS_NUMBER)' != ''" />
        <AssemblyInfo
            AssemblyCompany="My Company"
            AssemblyConfiguration="$(Configuration) $(BUILD_VCS_NUMBER)"
            AssemblyCopyright="Copyright YYYY My Company"
            AssemblyFileVersion="$(SemanticVersion).$([MSBuild]::Modulo($(DateNow), 65535))"
            AssemblyInformationalVersion="$(QualifiedSemanticVersion)"
            AssemblyProduct="My Product"
            AssemblyVersion="$(SemanticVersion).0"
            CodeLanguage="CS"
            OutputFile="$(MSBuildProjectDirectory)\VersionInfo.cs"
            Condition="'$(BUILD_VCS_NUMBER)' != ''" />
    </Target>
</Project>

Set-SemanticQualfier.ps1

# Run this in a build step and the %teamcity.build.branch.is_default%
# gets subbed in with "True" or "False"
if(-not $%teamcity.build.branch.is_default%)
{
  Write-Host "##teamcity[setParameter name='env.SemanticQualifier' value='-beta{0}']"
}