functions/Get-GitBranch.ps1
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function Get-GitBranch { <# .SYNOPSIS Gets a list of branches for the specified repository. .DESCRIPTION Gets a list of branches for the specified repository. By default, branches are returned in branch name (alphabetical) order, as they are with native git commands. .PARAMETER Repo The name of a git repository, or the path or a substring of the path of a repository directory or any of its subdirectories or files. If the Repo parameter is omitted, the current repository will be used if currently inside a repository; otherwise, nothing is returned. For examples of using the Repo parameter, refer to the help text for Get-GitRepo. .PARAMETER BranchName The names of the branches to be checked out. Wildcard characters are allowed. The pattern will match against existing branches in the specified repository. A warning will be generated for any values that do not match the name of an existing branch. Branches can be suppressed from results on either a global, local only, or remote only basis using by setting the $Powdrgit.BranchExcludes value (see examples). RepoPattern is a regular expression evaluated against RepoName to identify repositories that the filter will be applied to. BranchPattern is a regular expression evaluated against BranchFullName to identify branches that will be excluded from results. ApplyTo can be used to limit the filtering to either local branches, remote branches, or either. Valid ApplyTo values are: 'Local', 'Remote', or 'Global. An empty string or $null is equivalent to 'Global'. Any other value will cause the filter to be ignored. Multiple filters can be defined, and all filters that match a given repository will be applied. By default, when a filter causes exclusion of branches from the results a warning will be displayed. This can be suppressed by setting $Powdrgit.BranchExcludesNoWarn = $true. .PARAMETER Current Limits the results to the current branch of the specified repository; otherwise, all matching branch names will be returned. .PARAMETER CurrentFirst Forces the current branch to be the first returned item. All other branches will be returned in branch name (alphabetical) order. .PARAMETER CurrentLast Forces the current branch to be the last returned item. All other branches will be returned in branch name (alphabetical) order. .PARAMETER IncludeRemote Includes remote branches in the output. .PARAMETER ExcludeLocal Excludes local branches from the output. .PARAMETER SetLocation Sets the working directory to the top-level directory of the specified repository. In the case where multiple Repo values are passed in, the location will reflect the repository that was specified last. .EXAMPLE ## Call from outside a repository without parameters ## PS C:\> $Powdrgit.Path = 'C:\PowdrgitExamples\MyToolbox;C:\PowdrgitExamples\Project1' # to ensure the repository paths are defined PS C:\> Get-GitBranch # Nothing was returned because a Repo was not provided. .EXAMPLE ## Call from outside a repository for non-existent repository ## PS C:\> $Powdrgit.Path = 'C:\PowdrgitExamples\MyToolbox;C:\PowdrgitExamples\Project1' # to ensure the repository paths are defined PS C:\> $Powdrgit.ShowWarnings = $true # to ensure warnings are visible PS C:\> Get-GitBranch -Repo NonExistentRepo WARNING: [Get-GitBranch]Repository 'NonExistentRepo' not found. Check the repository directory exists and has been added to the $Powdrgit.Path module variable. .EXAMPLE ## Call from outside a repository with Repo parameter ## PS C:\> $Powdrgit.Path = 'C:\PowdrgitExamples\MyToolbox;C:\PowdrgitExamples\Project1' # to ensure the repository paths are defined PS C:\> Get-GitBranch -Repo MyToolbox | Format-Table -Property RepoName,BranchName,IsCheckedOut,IsRemote RepoName BranchName IsCheckedOut IsRemote -------- ---------- ------------ -------- MyToolbox feature1 False False MyToolbox feature3 False False MyToolbox main True False MyToolbox release False False # The branches were returned even though the command was issued from outside the repository directory. .EXAMPLE ## Call from outside a repository with Repo and SetLocation parameters ## PS C:\> $Powdrgit.Path = 'C:\PowdrgitExamples\MyToolbox;C:\PowdrgitExamples\Project1' # to ensure the repository paths are defined PS C:\> Get-GitBranch -Repo MyToolbox -SetLocation | Format-Table -Property RepoName,BranchName,IsCheckedOut,IsRemote RepoName BranchName IsCheckedOut IsRemote -------- ---------- ------------ -------- MyToolbox feature1 False False MyToolbox feature3 False False MyToolbox main True False MyToolbox release False False PS C:\PowdrgitExamples\MyToolbox> # The branches were returned and the current location (reflected in the prompt) changed to the repository's top-level directory. .EXAMPLE ## Call from outside a repository with Repo and IncludeRemote parameters ## PS C:\> $Powdrgit.Path = 'C:\PowdrgitExamples\MyToolbox;C:\PowdrgitExamples\Project1' # to ensure the repository paths are defined PS C:\> Get-GitBranch -Repo MyToolbox -IncludeRemote | Format-Table -Property RepoName,BranchName,IsCheckedOut,IsRemote RepoName BranchName IsCheckedOut IsRemote -------- ---------- ------------ -------- MyToolbox feature1 False False MyToolbox feature3 False False MyToolbox main True False MyToolbox release False False MyToolbox feature2 False True # Remote branches were also included in the results. Note that remotes that are also the upstream of a local branch are omitted. .EXAMPLE ## Call from outside a repository with Repo, IncludeRemote and ExcludeLocal parameters ## PS C:\> $Powdrgit.Path = 'C:\PowdrgitExamples\MyToolbox;C:\PowdrgitExamples\Project1' # to ensure the repository paths are defined PS C:\> Get-GitBranch -Repo MyToolbox -IncludeRemote -ExcludeLocal | Format-Table -Property RepoName,BranchName,IsCheckedOut,IsRemote RepoName BranchName IsCheckedOut IsRemote -------- ---------- ------------ -------- MyToolbox feature2 False True # Only remote branches were included in the results. Note that remotes that are also the upstream of a local branch are omitted. .EXAMPLE ## Call from outside a repository with Repo and ExcludeLocal parameters ## PS C:\> $Powdrgit.Path = 'C:\PowdrgitExamples\MyToolbox;C:\PowdrgitExamples\Project1' # to ensure the repository paths are defined PS C:\> Get-GitBranch -Repo MyToolbox -ExcludeLocal PS C:\> # Use of the ExcludeLocal switch without the IncludeRemote switch returns no results because the function returns only local branches by default. .EXAMPLE ## Call from outside a repository with Repo and ExcludeLocal parameters ## PS C:\> $Powdrgit.Path = 'C:\PowdrgitExamples\MyToolbox;C:\PowdrgitExamples\Project1' # to ensure the repository paths are defined PS C:\> Get-GitRepo | Get-GitBranch | Format-Table -Property RepoName,BranchName,IsCheckedOut,IsRemote RepoName BranchName IsCheckedOut IsRemote -------- ---------- ------------ -------- MyToolbox feature1 False False MyToolbox feature3 False False MyToolbox main True False MyToolbox release False False Project1 main False False Project1 newfeature True False # By piping the results of Get-GitRepo into Get-GitBranch we can get a list of branches for multiple repositories in a single command. .EXAMPLE ## Get all local branches of the current repository ## PS C:\> $Powdrgit.Path = 'C:\PowdrgitExamples\MyToolbox;C:\PowdrgitExamples\Project1' # to ensure the repository paths are defined PS C:\> Set-GitRepo -Repo MyToolbox # move to the repository directory PS C:\PowdrgitExamples\MyToolbox> Get-GitBranch | Format-Table -Property RepoName,BranchName,IsCheckedOut,IsRemote RepoName BranchName IsCheckedOut IsRemote -------- ---------- ------------ -------- MyToolbox feature1 False False MyToolbox feature3 False False MyToolbox main True False MyToolbox release False False .EXAMPLE ## Call with -CurrentFirst switch ## PS C:\> $Powdrgit.Path = 'C:\PowdrgitExamples\MyToolbox;C:\PowdrgitExamples\Project1' # to ensure the repository paths are defined PS C:\> Set-GitRepo -Repo MyToolbox # move to the repository directory PS C:\PowdrgitExamples\MyToolbox> Get-GitBranch -CurrentFirst | Format-Table -Property RepoName,BranchName,IsCheckedOut,IsRemote RepoName BranchName IsCheckedOut IsRemote -------- ---------- ------------ -------- MyToolbox main True False MyToolbox feature1 False False MyToolbox feature3 False False MyToolbox release False False # The CurrentFirst switch caused the checked out branch to be returned in the first position. # This may be useful when piping to Set-GitBranch so that the script block is applied to the current branch before checking out another. .EXAMPLE ## Call with -CurrentLast switch ## PS C:\> $Powdrgit.Path = 'C:\PowdrgitExamples\MyToolbox;C:\PowdrgitExamples\Project1' # to ensure the repository paths are defined PS C:\> Set-GitRepo -Repo MyToolbox # move to the repository directory PS C:\PowdrgitExamples\MyToolbox> Get-GitBranch -CurrentLast | Format-Table -Property RepoName,BranchName,IsCheckedOut,IsRemote RepoName BranchName IsCheckedOut IsRemote -------- ---------- ------------ -------- MyToolbox feature1 False False MyToolbox feature3 False False MyToolbox release False False MyToolbox main True False # The CurrentLast switch caused the checked out branch to be returned in the last position. # This may be useful when piping to Set-GitBranch so that when the prompt returns, the same branch is checked out as when the command was executed. .EXAMPLE ## Call with -Current switch ## PS C:\> $Powdrgit.Path = 'C:\PowdrgitExamples\MyToolbox;C:\PowdrgitExamples\Project1' # to ensure the repository paths are defined PS C:\> Set-GitRepo -Repo MyToolbox # move to the repository directory PS C:\PowdrgitExamples\MyToolbox> Get-GitBranch -Current | Format-Table -Property RepoName,BranchName,IsCheckedOut,IsRemote RepoName BranchName IsCheckedOut IsRemote -------- ---------- ------------ -------- MyToolbox main True False # The Current switch caused only the checked out branch to be returned. .EXAMPLE ## Call with Repo value matching multiple repositories ## PS C:\> $Powdrgit.Path = 'C:\PowdrgitExamples\MyToolbox;C:\PowdrgitExamples\Project1' # to ensure the repository paths are defined PS C:\> $Powdrgit.ShowWarnings = $true # to ensure warnings are visible PS C:\> Get-GitBranch -Repo PowdrgitExamples -BranchName *feature* | Format-Table -Property RepoName,BranchName,IsCheckedOut,IsRemote,RepoPath WARNING: [Get-GitBranch]Repo argument 'PowdrgitExamples' matched multiple repositories. Please confirm any results or actions are as expected. RepoName BranchName IsCheckedOut IsRemote RepoPath -------- ---------- ------------ -------- -------- MyToolbox feature1 False False C:\PowdrgitExamples\MyToolbox MyToolbox feature3 False False C:\PowdrgitExamples\MyToolbox Project1 newfeature True False C:\PowdrgitExamples\Project1 .EXAMPLE ## Hide branches from results using $Powdrgit.BranchExcludes ## PS C:\> $Powdrgit.Path = 'C:\PowdrgitExamples\MyToolbox;C:\PowdrgitExamples\Project1' # to ensure the repository paths are defined PS C:\> $Powdrgit.ShowWarnings = $true # to ensure warnings are visible PS C:\> $Powdrgit.BranchExcludesNoWarn = $false # to ensure warnings are visible PS C:\> $Powdrgit.BranchExcludes += [PSCustomObject]@{ RepoPattern = '.*'; BranchPattern = 'feature\d'; ApplyTo = 'Local' } PS C:\> Get-GitBranch -Repo MyToolbox | Format-Table -Property RepoName,BranchName,IsCheckedOut,IsRemote WARNING: [Get-GitBranch]Branches excluded due to conditions in $Powdrgit.BranchExcludes: 4 RepoName BranchName IsCheckedOut IsRemote -------- ---------- ------------ -------- MyToolbox main True False MyToolbox release False False .INPUTS [System.String[]] Accepts string objects via the Repo parameter. The output of Get-GitRepo can be piped into Get-GitBranch. .OUTPUTS [GitBranch] Returns a custom GitBranch object. For details use Get-Member at a command prompt e.g.: PS C:\PowdrgitExamples\MyToolbox> Get-GitBranch | Get-Member -MemberType Properties .NOTES Author : nmbell .LINK Set-GitBranch .LINK Get-GitRepo .LINK Get-GitLog .LINK Get-GitTag .LINK about_powdrgit .LINK https://github.com/nmbell/powdrgit/blob/main/help/about_powdrgit.md #> # Function alias [Alias('ggb')] # Use cmdlet binding [CmdletBinding( DefaultParameterSetName = 'Remote' , HelpURI = 'https://github.com/nmbell/powdrgit/blob/main/help/Get-GitBranch.md' )] # Declare output type [OutputType('GitBranch', ParameterSetName = ('Current','CurrentFirst','CurrentLast','Remote'))] # Declare parameters Param( [Parameter( Mandatory = $false , Position = 0 , ValueFromPipeline = $false , ValueFromPipelineByPropertyName = $true )] # [ArgumentCompleter()] [Alias('RepoName','RepoPath')] [String[]] $Repo , [Parameter( Mandatory = $false , Position = 1 , ValueFromPipeline = $false , ValueFromPipelineByPropertyName = $true )] # [ArgumentCompleter()] [String[]] $BranchName = '*' , [Parameter(ParameterSetName = 'Current')] [Switch] $Current , [Parameter(ParameterSetName = 'CurrentFirst')] [Switch] $CurrentFirst , [Parameter(ParameterSetName = 'CurrentLast')] [Switch] $CurrentLast , [Parameter(ParameterSetName = 'CurrentFirst')] [Parameter(ParameterSetName = 'CurrentLast' )] [Parameter(ParameterSetName = 'Remote' )] [Switch] $IncludeRemote , [Parameter(ParameterSetName = 'Remote')] [Switch] $ExcludeLocal , [Switch] $SetLocation ) BEGIN { $bk = 'B' # Common BEGIN: Set-StrictMode -Version 3.0 $thisFunctionName = $MyInvocation.MyCommand $start = Get-Date $indent = ($Powdrgit.DebugIndentChar[0]+' ')*($PowdrgitCallDepth++) $PSDefaultParameterValues += @{ '*:Verbose' = $(If ($DebugPreference -notin 'Ignore','SilentlyContinue') { $DebugPreference } Else { $VerbosePreference }) } # turn on Verbose with Debug $warn = $Powdrgit.ShowWarnings -and !($PSBoundParameters.ContainsKey('WarningAction') -and $PSBoundParameters.WarningAction -eq 'Ignore') # because -WarningAction:Ignore is not implemented correctly Write-Debug " $(ts)$indent[$thisFunctionName][$bk]Start: $($start.ToString('yyyy-MM-dd HH:mm:ss.fff'))" # Function BEGIN: Write-Debug " $(ts)$indent[$thisFunctionName][$bk]Finding current location" $startLocation = $PWD.Path # Initialize variables $matchingBranchesTotal = 0 $sortRepoName = @{ Expression = 'RepoName' ; Ascending = $true } $sortBranchName = @{ Expression = 'BranchName' ; Ascending = $true } $sortIsCheckedOutFirst = @{ Expression = 'IsCheckedOut'; Descending = $true } $sortIsCheckedOutLast = @{ Expression = 'IsCheckedOut'; Ascending = $true } $sortIsRemote = @{ Expression = 'IsRemote' ; Ascending = $true } } PROCESS { $bk = 'P' # Find the repository path from current location if necessary If (!$PSBoundParameters.ContainsKey('Repo')) { $Repo = Get-GitRepo -Current | Select-Object -ExpandProperty RepoPath } # Get the repository info $validRepos = Get-ValidRepo -Repo $Repo # Get the branches $matchingBranches = New-Object -TypeName System.Collections.ArrayList ForEach ($validRepo in $validRepos) { # Keep track of which BranchName patterns don't match any branches $unmatchedBranchNames = @{} ForEach ($_branchName in $BranchName) { $unmatchedBranchNames.$_branchName = $null } # Get branch filters for this repository $branchExcludeFilters = $Powdrgit.BranchExcludes | Where-Object { $_.RepoPattern -and $_.BranchPattern -and $validRepo.RepoName -match $_.RepoPattern -and ($_.ApplyTo -in 'Local','Remote','Global','',$null) } $branchExcludeFiltersCount = If ($branchExcludeFilters) { $branchExcludeFilters.Count } Else { 0 } Write-Verbose "$(ts)$indent[$thisFunctionName][$bk]Found branch exclusion filters: $('{0,3}' -f $branchExcludeFiltersCount)" $branchExcludeCount = 0 # Move to the repository directory Write-Debug " $(ts)$indent[$thisFunctionName][$bk]Moving to the repository directory: $($validRepo.RepoPath)" Set-GitRepo -Repo $validRepo.RepoPath -WarningAction Ignore # Get local branch info Write-Debug " $(ts)$indent[$thisFunctionName][$bk]Finding local branch info" $gitCommand = 'git for-each-ref "refs/heads" --format="%(objectname)\%(refname)\%(HEAD)\%(upstream)"' # separate with \ as this is not allowed in branch names $gitResults = Invoke-GitExpression -Command $gitCommand -SuppressGitErrorStream Write-Verbose "$(ts)$indent[$thisFunctionName][$bk]Found local branches: $('{0,3}' -f ($gitResults | Measure-Object).Count)" ForEach ($line in $gitResults | Where-Object { $_.Trim() }) { $lineSplit = $line.Split('\') $branchFullName = $lineSplit[1] $isCheckedOut = $lineSplit[2] -eq '*' $upstreamFullName = $lineSplit[3] $thisBranchName = $branchFullName -replace '^refs/\w+/','' $upstreamName = $upstreamFullName.Replace('refs/remotes/','') $branchLeafName = Split-Path -Path $branchFullName -Leaf ForEach ($_branchName in $BranchName) { If ($thisBranchName -like $_branchName) { $branchExcluded = $false ForEach ($pattern in $branchExcludeFilters | Where-Object { $_.ApplyTo -in 'Local','Global','',$null } | Select-Object -ExpandProperty BranchPattern) { If ($branchFullName -match $pattern) { $branchExcluded = $true $branchExcludeCount++ } } If (!$branchExcluded) { $matchingBranches += [GitBranch]@{ 'RepoName' = $validRepo.RepoName 'RepoPath' = $validRepo.RepoPath 'SHA1Hash' = $lineSplit[0] 'BranchName' = $thisBranchName 'IsCheckedOut' = $isCheckedOut 'IsRemote' = $false 'BranchLeafName' = $branchLeafName 'BranchFullName' = $branchFullName 'Upstream' = $upstreamName 'UpstreamFullName' = $upstreamFullName } $unmatchedBranchNames.Remove($_branchName) } } } } # Get remote branch info Write-Debug " $(ts)$indent[$thisFunctionName][$bk]Finding remote branch info" $gitCommand = 'git for-each-ref "refs/remotes" --format="%(objectname)\%(refname)"' # separate with \ as this is not allowed in branch names $gitResults = Invoke-GitExpression -Command $gitCommand -SuppressGitErrorStream Write-Verbose "$(ts)$indent[$thisFunctionName][$bk]Found remote branches: $('{0,3}' -f ($gitResults | Measure-Object).Count)" ForEach ($line in $gitResults | Where-Object { $_.Trim() }) { $lineSplit = $line.Split('\') $branchFullName = $lineSplit[1] $thisBranchName = $branchFullName -replace '^refs/\w+/','' $branchLeafName = Split-Path -Path $branchFullName -Leaf If ($matchingBranches.Count -gt 0 -and $branchFullName -in $matchingBranches.UpstreamFullName) { Continue } # omit remote branches that are the upstream for a local one If ($branchLeafName -eq 'HEAD') { Continue } # omit HEAD ForEach ($_branchName in $BranchName) { If ($thisBranchName -like $_branchName) { $branchExcluded = $false ForEach ($pattern in $branchExcludeFilters | Where-Object { $_.ApplyTo -in 'Remote','Global','',$null } | Select-Object -ExpandProperty BranchPattern) { If ($branchFullName -match $pattern) { $branchExcluded = $true $branchExcludeCount++ } } If (!$branchExcluded) { $matchingBranches += [GitBranch]@{ 'RepoName' = $validRepo.RepoName 'RepoPath' = $validRepo.RepoPath 'SHA1Hash' = $lineSplit[0] 'BranchName' = $thisBranchName 'IsCheckedOut' = $false 'IsRemote' = $true 'BranchLeafName' = $branchLeafName 'BranchFullName' = $branchFullName 'Upstream' = $null 'UpstreamFullName' = $null } $unmatchedBranchNames.Remove($_branchName) } } } } # Warn if any branches were excluded by filters If ($branchExcludeCount) { If ($warn -and !$Powdrgit.BranchExcludesNoWarn) { Write-Warning "[$thisFunctionName]Branches excluded due to conditions in `$Powdrgit.BranchExcludes: $branchExcludeCount" } } # Warn if any BranchName values didn't match a branch If ($unmatchedBranchNames.Count) { If ($warn) { Write-Warning "[$thisFunctionName]The following BranchName patterns did not match any branches in the '$($validRepo.RepoName)' repository: '$($unmatchedBranchNames.Keys -join "','")'" } } } $matchingBranchesTotal += $matchingBranches.Count # Set sort order Write-Debug " $(ts)$indent[$thisFunctionName][$bk]Setting sort order" $sortProperty = New-Object -TypeName System.Collections.ArrayList $sortProperty += $sortRepoName If ($CurrentFirst) { $sortProperty += $sortIsCheckedOutFirst } If ($CurrentLast ) { $sortProperty += $sortIsCheckedOutLast } $sortProperty += $sortIsRemote $sortProperty += $sortBranchName # Output Write-Debug "$(ts)$indent[$thisFunctionName][$bk]Outputting branches : $('{0,3}' -f $matchingBranches.Count)" Write-Output $matchingBranches ` | Where-Object { ($Current -and $_.IsCheckedOut) -or !$Current } ` | Where-Object { ($IncludeRemote -and $_.IsRemote) -or (!$ExcludeLocal -and !$_.IsRemote) } ` | Sort-Object -Property $sortProperty } END { $bk = 'E' # Function END: Write-Verbose "$(ts)$indent[$thisFunctionName][$bk]Output branches total: $('{0,3}' -f $matchingBranchesTotal)" If (!$SetLocation) { Write-Debug " $(ts)$indent[$thisFunctionName][$bk]Setting location to original directory" Set-Location -Path $startLocation } # Common END: $end = Get-Date $duration = New-TimeSpan -Start $start -End $end Write-Debug " $(ts)$indent[$thisFunctionName][$bk]Finish: $($end.ToString('yyyy-MM-dd HH:mm:ss.fff')) ($($duration.ToString('d\d\ hh\:mm\:ss\.fff')))" $PowdrgitCallDepth-- } } |