Functions/New-GitBranch.ps1
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# Licensed under the Apache License, Version 2.0 (the "License"); # you may not use this file except in compliance with the License. # You may obtain a copy of the License at # # http://www.apache.org/licenses/LICENSE-2.0 # # Unless required by applicable law or agreed to in writing, software # distributed under the License is distributed on an "AS IS" BASIS, # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. # See the License for the specific language governing permissions and # limitations under the License. function New-GitBranch { <# .SYNOPSIS Creates a new branch in a Git repository. .DESCRIPTION The `New-GitBranch` creates a new branch in a Git repository and then switches to (i.e. checks out) that branch. It defaults to the current repository. Use the `RepoRoot` parameter to specify an explicit path to another repo. This function implements the `git branch <branchname> <startpoint>` and `git checkout <branchname>` commands. .EXAMPLE New-GitBranch -RepoRoot 'C:\Projects\GitAutomation' -Name 'develop' Demonstrates how to create a new branch named 'develop' in the specified repository. .EXAMPLE New-GitBranch -Name 'develop Demonstrates how to create a new branch named 'develop' in the current directory. #> [CmdletBinding()] param( [string] # Specifies which git repository to add a branch to. Defaults to the current directory. $RepoRoot = (Get-Location).ProviderPath, [Parameter(Mandatory=$true)] [string] # The name of the new branch. $Name, [string] # The revision where the branch should be started/created. A revision can be a specific commit ID/sha (short or long), branch name, tag name, etc. Run git help gitrevisions or go to https://git-scm.com/docs/gitrevisions for full documentation on Git's revision syntax. $Revision = "HEAD" ) Set-StrictMode -Version 'Latest' $repo = Find-GitRepository -Path $RepoRoot -Verify if( -not $repo ) { return } try { if( Test-GitBranch -RepoRoot $RepoRoot -Name $Name ) { Write-Warning ('Branch {0} already exists in repository {1}' -f $Name, $RepoRoot) return } $newBranch = $repo.Branches.Add($Name, $Revision) $checkoutOptions = New-Object LibGit2Sharp.CheckoutOptions $repo.Checkout($newBranch, $checkoutOptions) } catch [LibGit2Sharp.LibGit2SharpException] { Write-Error ("Could not create branch '{0}' from invalid starting point: '{1}'" -f $Name, $Revision) } finally { $repo.Dispose() } } |