[Improvement] The executable 'git' could not be found

[GeertvanHorrik]

Haven't really dug into this problem, but it's related to #542 (I found this out via that issue):

INFO [07/28/15 11:14:12:11] Here is the current git graph (please include in issue): 
INFO [07/28/15 11:14:12:11] Showing max of 100 commits
INFO [07/28/15 11:14:12:11] Could not execute 'git log' due to the following error:
System.IO.FileNotFoundException: The executable file 'git' could not be found.
File name: 'git' ---> System.ComponentModel.Win32Exception (0x80004005): The system cannot find the file specified
at System.Diagnostics.Process.StartWithCreateProcess(ProcessStartInfo startInfo)
at System.Diagnostics.Process.Start(ProcessStartInfo startInfo)
at GitVersion.Helpers.ProcessHelper.Start(ProcessStartInfo startInfo) in c:\projects\gitversion\src\GitVersionCore\Helpers\ProcessHelper.cs:line 26
at GitVersion.Helpers.ProcessHelper.Start(ProcessStartInfo startInfo) in c:\projects\gitversion\src\GitVersionCore\Helpers\ProcessHelper.cs:line 40
at GitVersion.Helpers.ProcessHelper.Run(Action`1 output, Action`1 errorOutput, TextReader input, String exe, String args, String workingDirectory, KeyValuePair`2[] environmentalVariables) in c:\projects\gitversion\src\GitVersionCore\Helpers\ProcessHelper.cs:line 85
at GitVersion.LibGitExtensions.DumpGraph(String workingDirectory, Action`1 writer, Nullable`1 maxCommits) in c:\projects\gitversion\src\GitVersionCore\LibGitExtensions.cs:line 192

Maybe the path determination should be improved a bit?

[JakeGinnivan]

Currently assume git is installed on the %PATH%, is git actually installed on the box which had the error?

[GeertvanHorrik]

To be honest git isn't installed on any of my build agents.

[GeertvanHorrik]

Maybe we can investigate if we really need git.exe for this or if we can use libgit2sharp as well.

[JakeGinnivan]

This is not possible unless we re implement the graph drawing stuff from log.

[JakeGinnivan]

This is not required for any core parts of gitversion, it is only when there is an unhandled exception, we attempt to dump out a git log showing the current state of the repo which can help with debugging

[ghost]

That error message is a bit misleading. We use TeamCity and I forgot to select

VCS checkout mode: Automatically on agent.

By default it will checkout on server --> the build agent has not local .git directory.

[JakeGinnivan]

Can you paste your logs, I thought we detected that condition and gave a decent error message.

I will improve the error message around the missing git exe as well, its causing a lot of confusion

[ghost]

NuGet: GitVersion.CommandLine (3.0.2)

Sorry, German region settings:

INFO [08/24/15 15:27:29:19] Working directory: C:\BuildAgent\work\88ea5793095502ba
ERROR [08/24/15 15:27:29:23] An unexpected error occurred:
System.ArgumentNullException: Der Wert darf nicht NULL sein.
Parametername: path
   bei System.IO.Directory.GetParent(String path)
   bei GitVersion.GitPreparer.GetProjectRootDirectory() in c:\projects\gitversion\src\GitVersionCore\GitPreparer.cs:Zeile 108.
   bei GitVersion.ExecuteCore.ExecuteGitVersion(IFileSystem fileSystem, String targetUrl, String dynamicRepositoryLocation, Authentication authentication, String targetBranch, Boolean noFetch, String workingDirectory, String commitId) in c:\projects\gitversion\src\GitVersionCore\ExecuteCore.cs:Zeile 15.
   bei GitVersion.SpecifiedArgumentRunner.Run(Arguments arguments, IFileSystem fileSystem) in c:\projects\gitversion\src\GitVersionExe\SpecifiedArgumentRunner.cs:Zeile 22.
   bei GitVersion.Program.VerifyArgumentsAndRun() in c:\projects\gitversion\src\GitVersionExe\Program.cs:Zeile 90.
INFO [08/24/15 15:27:29:23]
INFO [08/24/15 15:27:29:23] Here is the current git graph (please include in issue):
INFO [08/24/15 15:27:29:23] Showing max of 100 commits
INFO [08/24/15 15:27:29:24] Could not execute 'git log' due to the following error: System.IO.FileNotFoundException: The executable file 'git' could not be found.
Dateiname: 'git' ---> System.ComponentModel.Win32Exception (0x80004005): Das System kann die angegebene Datei nicht finden
   bei System.Diagnostics.Process.StartWithCreateProcess(ProcessStartInfo startInfo)
   bei System.Diagnostics.Process.Start(ProcessStartInfo startInfo)
   bei GitVersion.Helpers.ProcessHelper.Start(ProcessStartInfo startInfo) in c:\projects\gitversion\src\GitVersionCore\Helpers\ProcessHelper.cs:Zeile 26.
   bei GitVersion.Helpers.ProcessHelper.Start(ProcessStartInfo startInfo) in c:\projects\gitversion\src\GitVersionCore\Helpers\ProcessHelper.cs:Zeile 40.
   bei GitVersion.Helpers.ProcessHelper.Run(Action`1 output, Action`1 errorOutput, TextReader input, String exe, String args, String workingDirectory, KeyValuePair`2[] environmentalVariables) in c:\projects\gitversion\src\GitVersionCore\Helpers\ProcessHelper.cs:Zeile 85.
   bei GitVersion.LibGitExtensions.DumpGraph(String workingDirectory, Action`1 writer, Nullable`1 maxCommits) in c:\projects\gitversion\src\GitVersionCore\LibGitExtensions.cs:Zeile 192.

[JakeGinnivan]

We need to get a test around that.. thats a regression :( Will get it fixed

[ghost]

Wait.. there is a new version 3.1.0 from last weekend.. let me check this first :-)

[ghost]

Nope, same problem with 3.1.0.