Move helpers to the separate repository

github/git.psm1

@@ -0,0 +1,81 @@
+<#
+.SYNOPSIS
+Configure git credentials to use with commits
+#>
+function Git-ConfigureUser {
+    Param (
+        [Parameter(Mandatory=$true)]
+        [string] $Name,
+        [Parameter(Mandatory=$true)]
+        [string] $Email
+    )
+
+    git config --global user.name $Name | Out-Host
+    git config --global user.email $Email | Out-Host
+
+    if ($LASTEXITCODE -ne 0) {
+        Write-Host "##vso[task.logissue type=error;] Unexpected failure occurs while configuring git preferences."
+        exit 1
+    }
+}
+
+<#
+.SYNOPSIS
+Create new branch
+#>
+function Git-CreateBranch {
+    Param (
+        [Parameter(Mandatory=$true)]
+        [string] $Name
+    )
+
+    git checkout -b $Name | Out-Host
+
+    if ($LASTEXITCODE -ne 0) {
+        Write-Host "##vso[task.logissue type=error;] Unexpected failure occurs while creating new branch: $Name."
+        exit 1
+    }
+}
+
+<#
+.SYNOPSIS
+Commit all staged and unstaged changes
+#>
+function Git-CommitAllChanges {
+    Param (
+        [Parameter(Mandatory=$true)]
+        [string] $Message
+    )
+
+    git add -A | Out-Host
+    git commit -m "$Message" | Out-Host
+
+    if ($LASTEXITCODE -ne 0) {
+        Write-Host "##vso[task.logissue type=error;] Unexpected failure occurs while commiting changes."
+        exit 1
+    }
+}
+
+<#
+.SYNOPSIS
+Push branch to remote repository
+#>
+function Git-PushBranch {
+    Param (
+        [Parameter(Mandatory=$true)]
+        [string] $Name,
+        [Parameter(Mandatory=$true)]
+        [boolean] $Force
+    )
+
+    if ($Force) {
+        git push --set-upstream origin $Name --force | Out-Host
+    } else {
+        git push --set-upstream origin $Name | Out-Host
+    }
+    
+    if ($LASTEXITCODE -ne 0) {
+        Write-Host "##vso[task.logissue type=error;] Unexpected failure occurs while pushing changes."
+        exit 1
+    }
+}