error: src refspec master does not match any with powershell from VSTS

Question

I have a powershell script that downloads files from an SFTP and then it tries to commit them to git, however I am having issue in that last step.

try
{
    # Load WinSCP .NET assembly
   Add-Type -Path  "C:\Program Files (x86)\WinSCP\WinSCPnet.dll"

    # Setup session options
    $sessionOptions = New-Object WinSCP.SessionOptions -Property @{
        Protocol = [WinSCP.Protocol]::Sftp
        HostName = "myhostname"
        UserName = "myusername"
        Password = "mypassword"
        SshHostKeyFingerprint = "ssh-rsa 2048 myfingerprint"
        #GiveUpSecurityAndAcceptAnySshHostKey = "true" 
    }

    $session = New-Object WinSCP.Session

    try
    {
        New-Item -ItemType directory -Path "C:\tempfolder"

        # Connect
        $session.Open($sessionOptions)

        # Download files
        $transferOptions = New-Object WinSCP.TransferOptions
        $transferOptions.TransferMode = [WinSCP.TransferMode]::Binary

        $transferResult =
            $session.GetFiles("/BE_Test3rdPartyUpload2VSTS/Project1/upload/*", "c:\tempfolder\*", $False, $transferOptions)

        # Throw on any error
        $transferResult.Check()

        # Print results
        foreach ($transfer in $transferResult.Transfers)
        {
            Write-Host "Download of $($transfer.FileName) succeeded"
        }

        git config --global user.email "myusername"
        git config --global user.name "myname"

        git pull --rebase origin master
        git push origin master


        git add .
        git commit -m "Add existing file"
        git push origin "master"
    }
    finally
    {
        # Disconnect, clean up
        $session.Dispose()
    }

    exit 0
}
catch [Exception]
{
    Write-Host "Error: $($_.Exception.Message)"
    exit 1
}

Error I have is this:

Your `HEAD` is detached. Where are you cloning or otherwise initializing the repository you're trying to work with? You're downloading files to `C:\tempfolder`, but I don't see that you're doing anything at all with the files you put there, unless `C:\tempfolder` is the Git repository you're working with. — Daniel Mann, May 23 '18 at 04:02

score 2 · Accepted Answer · answered May 23 '18 at 06:16

To push changes to master branch, you should change the powershell script with below aspects:

Deselect Fail on Standard Error option for PowerShell task

Since most git commands shows non-standard output, you need to deselect Fail on Standard Error option for PowerShell task, else PowerShell will be failed.

Provider credential in the git repo URL

You need to provider credential when pushing changes to remote repo. You can use PAT or alternate credential in the git repo URL. The format of the git repo URL as below:

https://Personal%20Access%20Token:{PAT}@{account}.visualstudio.com/{project}/_git/{repo}
https://{AlternateUserName}:{AlternatePassword}@{account}.visualstudio.com/{project}/_git/{repo}

So you should push with the command:

git push https://Personal%20Access%20Token:{PAT}@{account}.visualstudio.com/{project}/_git/{repo} master

Or

git push https://{AlternateUserName}:{AlternatePassword}@{account}.visualstudio.com/{project}/_git/{repo} master

Checkout to the build branch

In the build source directory, git repo is in HEAD detached by default, so you need to switch to the build branch by:
```
git checkout $(Build.SourceBranchName)
```
Remove unnecessary commands

Below two commands in your script seems make no changes both for the local master branch and remote master branch:
```
git pull --rebase origin master
git push origin master
```

So you can remove them in your script.

And below is the example for the changed powershell scripts:

try
{
    # Load WinSCP .NET assembly
   Add-Type -Path  "C:\Program Files (x86)\WinSCP\WinSCPnet.dll"

    # Setup session options
    $sessionOptions = New-Object WinSCP.SessionOptions -Property @{
        Protocol = [WinSCP.Protocol]::Sftp
        HostName = "myhostname"
        UserName = "myusername"
        Password = "mypassword"
        SshHostKeyFingerprint = "ssh-rsa 2048 myfingerprint"
        #GiveUpSecurityAndAcceptAnySshHostKey = "true" 
    }

    $session = New-Object WinSCP.Session

    try
    {
        New-Item -ItemType directory -Path "C:\tempfolder"

        # Connect
        $session.Open($sessionOptions)

        # Download files
        $transferOptions = New-Object WinSCP.TransferOptions
        $transferOptions.TransferMode = [WinSCP.TransferMode]::Binary

        $transferResult =
            $session.GetFiles("/BE_Test3rdPartyUpload2VSTS/Project1/upload/*", "c:\tempfolder\*", $False, $transferOptions)

        # Throw on any error
        $transferResult.Check()

        # Print results
        foreach ($transfer in $transferResult.Transfers)
        {
            Write-Host "Download of $($transfer.FileName) succeeded"
        }

        git config --global user.email "myusername"
        git config --global user.name "myname"

        git checkout $(Build.SourceBranchName)

        git add .
        git commit -m "Add existing file"
        git push https://Personal%20Access%20Token:tp3iai4yextum26xa6k6qbflhjrvpt4jcaak8fkhbhlpis7zkndq@marinaliu.visualstudio.com/Git2/_git/product1 master 
    }
    finally
    {
        # Disconnect, clean up
        $session.Dispose()
    }

    exit 0
}
catch [Exception]
{
    Write-Host "Error: $($_.Exception.Message)"
    exit 1
}

btw, if you can check this or somebody in your team, Id appreciate it: https://stackoverflow.com/questions/50483072/how-to-queue-a-new-build-using-vsts-rest-api — Luis Valencia, May 23 '18 at 08:08

error: src refspec master does not match any with powershell from VSTS

1 Answers1