z.ps1
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$cdHistory = Join-Path -Path $Env:USERPROFILE -ChildPath '\.cdHistory' <# .SYNOPSIS Tracks your most used directories, based on 'frecency'. This is done by storing your CD command history and ranking it over time. .DESCRIPTION After a short learning phase, z will take you to the most 'frecent' directory that matches the regex given on the command line. .PARAMETER JumpPath A un-escaped regular expression of the directory name to jump to. Character escaping will be done internally. .PARAMETER Option Frecency - Match by frecency (default) Rank - Match by rank only Time - Match by recent access only .PARAMETER OnlyCurrentDirectory Restrict matches to subdirectories of the current directory .PARAMETER Listfiles List only, don't navigate to the directory .PARAMETER $Remove Remove the current directory from the datafile .PARAMETER $Clean Clean up all history entries that cannot be resolved .NOTES Current PowerShell implementation is very crude and does not yet support all of the options of the original z bash script. Although tracking of frequently used directories is obtained through the continued use of the "cd" command, the Windows registry is also scanned for frequently accessed paths. .LINK https://github.com/vincpa/z .EXAMPLE CD to the most frecent directory matching 'foo' z foo .EXAMPLE CD to the most recently accessed directory matching 'foo' z foo -o Time #> function z { param( [Parameter(Position=0)] [string] ${JumpPath}, [ValidateSet("Time", "T", "Frecency", "F", "Rank", "R")] [Alias('o')] [string] $Option = 'Frecency', [Alias('c')] [switch] $OnlyCurrentDirectory = $null, [Alias('l')] [switch] $ListFiles = $null, [Alias('x')] [switch] $Remove = $null, [Alias('d')] [switch] $Clean = $null ) if (((-not $Clean) -and (-not $Remove) -and (-not $ListFiles)) -and [string]::IsNullOrWhiteSpace($JumpPath)) { Get-Help z; return; } # If a valid path is passed in to z, treat it like the normal cd command if (-not [string]::IsNullOrWhiteSpace($JumpPath) -and (Test-Path $JumpPath)) { cdX $JumpPath return; } if ((Test-Path $cdHistory)) { if ($Remove) { Save-CdCommandHistory $Remove } elseif ($Clean) { Cleanup-CdCommandHistory } else { # This causes conflicts with the -Remove parameter. Not sure whether to remove registry entry. #$mruList = Get-MostRecentDirectoryEntries $providerRegex = $null If ($OnlyCurrentDirectory) { $providerRegex = (Get-FormattedLocation).replace('\','\\') + '\\.*?' } else { $providerRegex = Get-CurrentSessionProviderDrives ((Get-PSProvider).Drives | select -ExpandProperty Name) } $list = @() $global:history | ? { Get-DirectoryEntryMatchPredicate -path $_.Path -jumpPath $JumpPath -ProviderRegex $providerRegex } | Get-ArgsFilter -Option $Option | % { if ($ListFiles -or (Test-Path $_.Path.FullName)) {$list += $_} } if ($ListFiles) { $newList = $list | % { New-Object PSObject -Property @{Rank = $_.Rank; Path = $_.Path.FullName; LastAccessed = [DateTime]$_.Time } } Format-Table -InputObject $newList -AutoSize } else { if ($list.Length -eq 0) { # It's not found in the history file, perhaps it's still a valid directory. Let's check. if ((Test-Path $JumpPath)) { cdX $JumpPath } else { Write-Host "$JumpPath Not found" } } else { if ($list.Length -gt 1) { $entry = $list | Sort-Object -Descending { $_.Score } | select -First 1 } else { $entry = $list[0] } Set-Location $entry.Path.FullName Save-CdCommandHistory $Remove } } } } else { Save-CdCommandHistory $Remove } } function pushdX { [CmdletBinding(DefaultParameterSetName='Path', SupportsTransactions=$true, HelpUri='http://go.microsoft.com/fwlink/?LinkID=113370')] param( [Parameter(ParameterSetName='Path', Position=0, ValueFromPipeline=$true, ValueFromPipelineByPropertyName=$true)] [string] ${Path}, [Parameter(ParameterSetName='LiteralPath', ValueFromPipelineByPropertyName=$true)] [Alias('PSPath')] [string] ${LiteralPath}, [switch] ${PassThru}, [Parameter(ValueFromPipelineByPropertyName=$true)] [string] ${StackName}) begin { try { $outBuffer = $null if ($PSBoundParameters.TryGetValue('OutBuffer', [ref]$outBuffer)) { $PSBoundParameters['OutBuffer'] = 1 } $wrappedCmd = $ExecutionContext.InvokeCommand.GetCommand('Push-Location', [System.Management.Automation.CommandTypes]::Cmdlet) $scriptCmd = {& $wrappedCmd @PSBoundParameters } $steppablePipeline = $scriptCmd.GetSteppablePipeline($myInvocation.CommandOrigin) $steppablePipeline.Begin($PSCmdlet) } catch { throw } } process { try { $steppablePipeline.Process($_) Save-CdCommandHistory # Build up the DB. } catch { throw } } end { try { $steppablePipeline.End() } catch { throw } } } function popdX { [CmdletBinding(SupportsTransactions=$true, HelpUri='http://go.microsoft.com/fwlink/?LinkID=113369')] param( [switch] ${PassThru}, [Parameter(ValueFromPipelineByPropertyName=$true)] [string] ${StackName}) begin { try { $outBuffer = $null if ($PSBoundParameters.TryGetValue('OutBuffer', [ref]$outBuffer)) { $PSBoundParameters['OutBuffer'] = 1 } $wrappedCmd = $ExecutionContext.InvokeCommand.GetCommand('Microsoft.PowerShell.Management\Pop-Location', [System.Management.Automation.CommandTypes]::Cmdlet) $scriptCmd = {& $wrappedCmd @PSBoundParameters } $steppablePipeline = $scriptCmd.GetSteppablePipeline($myInvocation.CommandOrigin) $steppablePipeline.Begin($PSCmdlet) } catch { throw } } process { try { $steppablePipeline.Process($_) } catch { throw } } end { try { $steppablePipeline.End() } catch { throw } } <# .ForwardHelpTargetName Microsoft.PowerShell.Management\Pop-Location .ForwardHelpCategory Cmdlet #> } # A wrapper function around the existing Set-Location Cmdlet. function cdX { [CmdletBinding(DefaultParameterSetName='Path', SupportsTransactions=$true, HelpUri='http://go.microsoft.com/fwlink/?LinkID=113397')] param( [Parameter(ParameterSetName='Path', Position=0, ValueFromPipeline=$true, ValueFromPipelineByPropertyName=$true)] [string] ${Path}, [Parameter(ParameterSetName='LiteralPath', Mandatory=$true, ValueFromPipelineByPropertyName=$true)] [Alias('PSPath')] [string] ${LiteralPath}, [switch] ${PassThru}, [Parameter(ParameterSetName='Stack', ValueFromPipelineByPropertyName=$true)] [string] ${StackName}) begin { $outBuffer = $null if ($PSBoundParameters.TryGetValue('OutBuffer', [ref]$outBuffer)) { $PSBoundParameters['OutBuffer'] = 1 } $PSBoundParameters['ErrorAction'] = 'Stop' $wrappedCmd = $ExecutionContext.InvokeCommand.GetCommand('Set-Location', [System.Management.Automation.CommandTypes]::Cmdlet) $scriptCmd = {& $wrappedCmd @PSBoundParameters } $steppablePipeline = $scriptCmd.GetSteppablePipeline($myInvocation.CommandOrigin) $steppablePipeline.Begin($PSCmdlet) } process { $steppablePipeline.Process($_) Save-CdCommandHistory # Build up the DB. } end { $steppablePipeline.End() } } function Get-DirectoryEntryMatchPredicate { Param( [Parameter( ValueFromPipeline=$true, ValueFromPipelineByPropertyName=$true)] $Path, [Parameter( ValueFromPipeline=$true, ValueFromPipelineByPropertyName=$true)] [string] $JumpPath, $ProviderRegex ) if ($Path -ne $null) { $null = .{ $providerMatches = [System.Text.RegularExpressions.Regex]::Match($Path.FullName, $ProviderRegex).Success } if ($providerMatches) { # Allows matching of entire names. Remove the first two characters, added by PowerShell when the user presses the TAB key. if ($JumpPath.StartsWith('.\')) { $JumpPath = $JumpPath.Substring(2).TrimEnd('\') } [System.Text.RegularExpressions.Regex]::Match($Path.Name, [System.Text.RegularExpressions.Regex]::Escape($JumpPath), [System.Text.RegularExpressions.RegexOptions]::IgnoreCase).Success } } } function Get-CurrentSessionProviderDrives([System.Collections.ArrayList] $ProviderDrives) { if ($ProviderDrives -ne $null -and $ProviderDrives.Length -gt 0) { Get-ProviderDrivesRegex $ProviderDrives } else { # The FileSystemProvider supports \\ and X:\ paths. # An ideal solution would be to ask the provider if a path is supported. # Supports drives such as C:\ and also UNC \\ if ((Get-Location).Provider.ImplementingType.Name -eq 'FileSystemProvider') { '(?i)^(((' + [String]::Concat( ((Get-Location).Provider.Drives.Name | % { $_ + '|' }) ).TrimEnd('|') + '):\\)|(\\{1,2})).*?' } else { Get-ProviderDrivesRegex (Get-Location).Provider.Drives } } } function Get-ProviderDrivesRegex([System.Collections.ArrayList] $ProviderDrives) { # UNC paths get special treatment. Allows one to 'z foo -ProviderDrives \\' and specify '\\' as the drive. if ($ProviderDrives -contains '\\') { $ProviderDrives.('\\') } if ($ProviderDrives.Count -eq 0) { '(?i)^(\\{1,2}).*?' } else { $uncRootPathRegex = '|(\\{1,2})' '(?i)^((' + [String]::Concat( ($ProviderDrives | % { $_ + '|' }) ).TrimEnd('|') + '):\\)' + $uncRootPathRegex + '.*?' } } function Get-Frecency($rank, $time) { # Last access date/time $dx = (Get-Date).Subtract((New-Object System.DateTime -ArgumentList $time)).TotalSeconds if( $dx -lt 3600 ) { return $rank*4 } if( $dx -lt 86400 ) { return $rank*2 } if( $dx -lt 604800 ) { return $rank/2 } return $rank/4 } function Cleanup-CdCommandHistory() { try { for($i = 0; $i -lt $global:history.Length; $i++) { $line = $global:history[$i] if ($line -ne $null) { $testDir = $line.Path.FullName if (-not [string]::IsNullOrWhiteSpace($testDir) -and !(Test-Path $testDir)) { $global:history[$i] = $null Write-Host "Removed inaccessible path $testDir" -ForegroundColor Yellow } } } Remove-Old-History WriteHistoryToDisk } catch { Write-Host $_.Exception.ToString() -ForegroundColor Red } } function Remove-Old-History() { if ($global:history.Length -gt 1000) { $global:history | ? { $_ -ne $null } | % {$i = 0} { $lineObj = $_ $lineObj.Rank = $lineObj.Rank * 0.99 # If it's been accessed in the last 14 days it can stay # or # If it's rank is greater than 20 and been accessed in the last 30 days it can stay if ($lineObj.Age -lt 1209600 -or ($lineObj.Rank -ge 5 -and $lineObj.Age -lt 2592000)) { #$global:history[$i] = ConvertTo-DirectoryEntry (ConvertTo-TextualHistoryEntry $lineObj.Rank $lineObj.Path.FullName $lineObj.Time) } else { Write-Host "Removing old item: Rank:" $lineObj.Rank "Age:" ($lineObj.Age/60/60) "Path:" $lineObj.Path.FullName -ForegroundColor Yellow $global:history[$i] = $null } $i++; } } } function Save-CdCommandHistory($removeCurrentDirectory = $false) { $currentDirectory = Get-FormattedLocation try { $foundDirectory = $false $runningTotal = 0 for($i = 0; $i -lt $global:history.Length; $i++) { $line = $global:history[$i] $canIncreaseRank = $true; $rank = $line.Rank; if (-not $foundDirectory) { $rank = $line.Rank if ($line.Path.FullName -eq $currentDirectory) { $foundDirectory = $true if ($removeCurrentDirectory) { $canIncreaseRank = $false $global:history[$i] = $null Write-Host "Removed entry $currentDirectory" -ForegroundColor Green } else { $rank++ Update-HistoryEntryUsageTime $global:history[$i] } } } if ($canIncreaseRank) { $runningTotal += $rank } } if (-not $foundDirectory -and $removeCurrentDirectory) { Write-Host "Current directory not found in CD history data file" -ForegroundColor Red } else { if (-not $foundDirectory) { Save-HistoryEntry 1 $currentDirectory $runningTotal += 1 } Remove-Old-History } WriteHistoryToDisk } catch { Write-Host $_.Exception.ToString() -ForegroundColor Red } } function WriteHistoryToDisk() { $newList = GetAllHistoryAsText $global:history Out-File -InputObject $newList -FilePath $cdHistory } function GetAllHistoryAsText($history) { return $history | ? { $_ -ne $null } | % { ConvertTo-TextualHistoryEntry $_.Rank $_.Path.FullName $_.Time } } function Get-FormattedLocation() { if ((Get-Location).Provider.ImplementingType.Name -eq 'FileSystemProvider' -and (Get-Location).Path.Contains('FileSystem::\\')) { Get-Location | select -ExpandProperty ProviderPath # The registry provider does return a path which z understands. In other words, I'm too lazy. } else { Get-Location | select -ExpandProperty Path } } function Format-Rank($rank) { return $rank.ToString("000#.00", [System.Globalization.CultureInfo]::InvariantCulture); } function Save-HistoryEntry($rank, $directory) { $entry = ConvertTo-TextualHistoryEntry $rank $directory $global:history += ConvertTo-DirectoryEntry $entry } function Update-HistoryEntryUsageTime($historyEntry) { $historyEntry.Rank++ $historyEntry.Time = (Get-Date).Ticks } function ConvertTo-TextualHistoryEntry($rank, $directory, $lastAccessedTicks) { if ($lastAccessedTicks -eq $null) { $lastAccessedTicks = (Get-Date).Ticks } (Format-Rank $rank) + $lastAccessedTicks + $directory } function ConvertTo-DirectoryEntry { Param( [Parameter( Position=0, Mandatory=$true, ValueFromPipeline=$true, ValueFromPipelineByPropertyName=$true)] [String]$line ) Process { $null = .{ $pathValue = $line.Substring(25) try { $fileName = [System.IO.Path]::GetFileName($pathValue); # GetFileName() does not work with registry paths if ($fileName -eq '') { $lastPathSeparator = $pathValue.LastIndexOf('\'); if ($lastPathSeparator -ge 0) { $pathValue = $pathValue.TrimEnd('\'); $fileName = $pathValue.Substring( + 1); } } } catch [System.ArgumentException] { } $time = [long]::Parse($line.Substring(7, 18), [Globalization.CultureInfo]::InvariantCulture) } @{ Rank=GetRankFromLine $line; Time=$time; Path=@{ Name = $fileName; FullName = $pathValue }; Age=(Get-Date).Subtract((New-Object System.DateTime -ArgumentList $time)).TotalSeconds; } } } function GetRankFromLine([String]$line) { $null = .{ $rankStr = $line.Substring(0, 7) } [double]::Parse($rankStr, [Globalization.CultureInfo]::InvariantCulture) } function Get-MostRecentDirectoryEntries { $mruEntries = (Get-Item -Path HKCU:\Software\Microsoft\Windows\CurrentVersion\Explorer\TypedPaths | % { $item = $_; $_.GetValueNames() | % { $item.GetValue($_) } }) $mruEntries | % { ConvertTo-TextualHistoryEntry 1 $_ } } function Get-ArgsFilter { Param( [Parameter(ValueFromPipeline=$true)] [Hashtable]$historyEntry, [string] $Option = 'Frecency' ) Process { if ($Option -in ('Frecency', 'F')) { $_['Score'] = (Get-Frecency $_.Rank $_.Time); } elseif ($Option -in ('Time', 'T')) { $_['Score'] = $_.Time; } elseif ($Option -in ('Rank', 'R')) { $_['Score'] = $_.Rank; } return $_; } } <# .ForwardHelpTargetName Set-Location .ForwardHelpCategory Cmdlet #> # Get cdHistory and hydrate a in-memory collection $global:history = @() if ((Test-Path -Path $cdHistory)) { $global:history += Get-Content -Path $cdHistory -Encoding UTF8 | ? { (-not [String]::IsNullOrWhiteSpace($_)) } | ConvertTo-DirectoryEntry } z nm -Option t |