Produce an MSBuild error when "git" is not present in PATH

[adamralph]

Use case(s)

Diagnosing the case when "git" is not present in PATH.

Description

When "git" is not present in PATH, the following type of message is shown in an IDE:

The underlying problem is only visible in the build log:

1>Unhandled exception. System.InvalidOperationException: "git" is not present in PATH.
1> ---> System.ComponentModel.Win32Exception (2): An error occurred trying to start process 'git' with working directory 'Y:\adamralph\simple-exec\SimpleExec'. The system cannot find the file specified.
1>   at System.Diagnostics.Process.StartWithCreateProcess(ProcessStartInfo startInfo)
1>   at System.Diagnostics.Process.Start()
1>   at MinVer.Lib.GitCommand.TryRun(String args, String workingDirectory, ILogger log, String& output) in /_/MinVer.Lib/GitCommand.cs:line 32
1>   --- End of inner exception stack trace ---
1>   at MinVer.Lib.GitCommand.TryRun(String args, String workingDirectory, ILogger log, String& output) in /_/MinVer.Lib/GitCommand.cs:line 36
1>   at MinVer.Lib.Versioner.GetVersion(String workDir, String tagPrefix, String defaultPreReleasePhase, ILogger log) in /_/MinVer.Lib/Versioner.cs:line 38
1>   at MinVer.Lib.Versioner.GetVersion(String workDir, String tagPrefix, MajorMinor minMajorMinor, String buildMeta, VersionPart autoIncrement, String defaultPreReleasePhase, ILogger log, Boolean ignoreHeight) in /_/MinVer.Lib/Versioner.cs:line 18
1>   at MinVer.Program.<>c__DisplayClass1_0.<Main>b__0() in /_/minver-cli/Program.cs:line 81
1>   at McMaster.Extensions.CommandLineUtils.CommandLineApplication.<>c__DisplayClass143_0.<OnExecute>b__0(CancellationToken _)
1>   at McMaster.Extensions.CommandLineUtils.CommandLineApplication.ExecuteAsync(String[] args, CancellationToken cancellationToken)
1>   at McMaster.Extensions.CommandLineUtils.CommandLineApplication.Execute(String[] args)
1>   at MinVer.Program.Main(String[] args) in /_/minver-cli/Program.cs:line 88

With this enhancement, an MSBuild error is produced when "git" is not present in PATH.

• Error code: MINVER1007
• Error message: "git" is not present in PATH

Alternatives

Keep things as they are and require users to look at the build log to determine that the underlying problem is that "git" is not present in PATH.

Additional context

Thanks to @marinusmaurice for making me aware of this potential enhancement in #776.

[adamralph]

released in 4.2.0-alpha.1 and 4.2.0-rc.1

[adamralph]

@marinusmaurice would you like to try out 4.2.0-rc.1 to see if it behaves in the desired way you described in #776?