about_Cd-Extras.help.txt
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# cd-extras <!-- TOC --> - [Navigation helpers](#navigation-helpers) - [AUTO_CD](#auto_cd) - [CD_PATH](#cd_path) - [CDABLE_VARS](#cdable_vars) - [No argument cd](#no-argument-cd) - [Two argument cd](#two-argument-cd) - [Expansion](#expansion) - [Enhanced expansion for built-ins](#enhanced-expansion-for-built-ins) - [Path shortening](#path-shortening) - [Navigation helper expansions](#navigation-helper-expansions) - [Multi-dot and variable based expansions](#multi-dot-and-variable-based-expansions) - [Additional helpers](#additional-helpers) - [Note on compatibility](#note-on-compatibility) - [Alternative providers](#alternative-providers) - [OS X & Linux](#os-x--linux) - [Install](#install) - [Configure](#configure) <!-- /TOC --> # What is it? general conveniences for the `cd` command in PowerShell stolen from bash and zsh  ## Navigation helpers Provides the following aliases (and corresponding functions): - `up`, `..` (`Step-Up`) - `cd-` (`Undo-Location`) - `cd+` (`Redo-Location`) - `cd:` (`Switch-LocationPart`) - `cdb` (`Step-Back`) Examples: ```sh [C:\Windows\System32]> up # or .. [C:\Windows]> cd- [C:\Windows\System32]> cd+ [C:\Windows]> _ ``` Note that the aliases are `cd-` and `cd+` _not_ `cd -` and `cd +`. Repeated uses of `cd-` will keep moving backwards towards the beginning of the stack rather than toggling between the two most recent directories as in vanilla bash. (Use `Step-Back` (`cdb`) to toggle between the current and previous directories.) ```sh [C:\Windows\System32]> .. [C:\Windows]> .. [C:\]> cd- [C:\Windows]> cd- [C:\Windows\System32]> cd+ [C:\Windows]> cd+ [C:\]> cdb [C:\Windows]> cdb [C:\]> _ ``` `up`, `cd+` and `cd-` each take a single optional parameter: either a number, `n`, used to specify the number of levels or locations to traverse, as in: ```sh [C:\Windows\System32]> .. 2 # or `up 2` [C:\]> cd temp [C:\temp]> cd- 2 [C:\Windows\System32]> cd+ 2 [C:\temp]> _ ``` ...or a string, `NamePart`, used to change to the nearest directory whose name matches the given argument. [Tab completion](#navigation-helper-expansions) is provided for all of these helpers. ```sh [C:\Windows\System32\drivers\etc]> up win # or `.. win` [C:\Windows]> _ ``` The logic of `cd- <NamePart>` and `cd+ <NamePart>` is to search the stack, starting at the current location, for directories whose name contains the given string. If none is found then it will attempt to match against the full path instead. For example: ```sh [C:\Windows]> cd system32 [C:\Windows\System32]> cd drivers [C:\Windows\System32\drivers]> cd- sys [C:\Windows\System32]> cd+ [C:\Windows\System32\drivers]> cd- win [C:\Windows\]> cd+ 32/dr [C:\Windows\System32\drivers]> _ ``` When the [AUTO_CD](#auto_cd) option is enabled, multiple dot syntax for `up` is supported as an alternative to `up [n]`. [Tab completions](#multi-dot-and-variable-based-expansions) are available. ```sh [C:\Windows\System32\drivers\etc]> ... # same as `up 2` or `.. 2` [C:\Windows\System32]> cd- [C:\Windows\System32\drivers\etc>] .... # same as `up 3` or `.. 3` [C:\Windows]> _ ``` ## AUTO_CD Change directory without typing `cd`. ```sh [~]> projects [~/projects]> cd-extras [~/projects/cd-extras]> _ ``` As with the `cd` command, [abbreviated paths](#path-shortening) are supported. ```sh [~]> pr [~/projects]> cd-e [~/projects/cd-extras]> _ ``` ## CD_PATH Search additional locations for candidate directories. [Tab-expansion](#enhanced-expansion-for-built-ins) into `CD_PATH` directories is provided. ```sh [~]> $cde.CD_PATH = @('~/documents') [~]> # or Set-CdExtrasOption CD_PATH @('~/documents') [~]> cd WindowsPowerShell [~/documents/WindowsPowerShell]> _ ``` Note that `CD_PATH`s are _not_ searched when an absolute or relative path is given. ```sh [~]> $cde.CD_PATH = @('~/documents') [~]> cd ./WindowsPowerShell Set-Location : Cannot find path '~\WindowsPowerShell' because it does not exist. ``` ## CDABLE_VARS Save yourself a `$` when cding into folders using a variable name and enable [completion](#multi-dot-and-variable-based-expansions) for child directories. Given a variable containing the path to a folder (configured, perhaps, in your `$PROFILE` or by invoking [`Export-Up`](#multi-dot-and-variable-based-expansions)), you can `cd` into it using the name of the variable. ```sh [~]> $power = '~/projects/powershell' [~]> cd power [~/projects/powershell]> _ ``` This works with relative paths too, so if you find yourself frequently `cd`ing into the same subdirectories you could create a corresponding variable. ```sh [~/projects/powershell]> $gh = './.git/hooks' [~/projects/powershell]> cd gh [~/projects/powershell/.git/hooks]> _ ``` CDABLE_VARS is off by default. Enable it with: `Set-CdExtrasOption CDABLE_VARS $true`. ## No argument cd If the option `$cde.NOARG_CD` is defined then `cd` with no arguments will move into the nominated directory. Defaults to `'~'`. ```sh [C:\Windows\System32\]> cd [~]> _ ``` ## Two argument cd Replaces all instances of the first argument in the current path with the second argument, changing to the resulting directory if it exists. Uses the `Switch-LocationPart` (`cd:`) function. ```sh [~\Modules\Unix\Microsoft.PowerShell.Utility]> cd unix shared [~\Modules\Shared\Microsoft.PowerShell.Utility]> _ ``` ## Expansion ### Enhanced expansion for built-ins `cd`, `pushd` and `ls` (by default) provide enhanced tab completions, expanding all path segments so that you don't have to individually tab through each one. ```sh [~]> cd /w/s/set<[Tab]><[Tab]> C:\Windows\System32\setup\ C:\Windows\SysWOW64\setup\ ‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾ ``` Periods (`.`) are expanded around so, for example, a segment containing `.sdk` is expanded into `*.sdk*`. ```sh [~]> cd proj/pow/s/.sdk<[Tab]><[Enter]> [~\projects\powershell\src\Microsoft.PowerShell.SDK]> _ ``` You can change the list of commands that participate in enhanced directory completion using the `DirCompletions` [option](#configure): ```sh [~]> $cde.DirCompletions += 'mkdir' [~]> # or Set-CdExtrasOption DirCompletions ($cde.DirCompletions + 'mkdir') [~]> mkdir ~/pow/src<[Tab]> [~]> mkdir ~\powershell\src\_ ``` It's also possible to opt into enhanced file-only or general (file & directory) completion using the `FileCompletions` and `PathCompletions` options respectively. ```sh [~]> $cde.PathCompletions += 'Invoke-Item' [~]> # or Set-CdExtrasOption PathCompletions ($cde.PathCompletions + 'Invoke-Item') [~]> ii /t/<[Tab]> C:\temp\subdir C:\temp\txtFile.txt C:\temp\txtFile2.txt ‾‾‾‾‾‾‾‾‾‾‾‾‾‾ ``` Paths within the `$cde.CD_PATH` array are considered for expansion by all completion types. ```sh [~]> $cde.CD_PATH += '~\Documents\' [~]> cd win/mod [~\Documents\WindowsPowerShell\Modules]> _ ``` ### Path shortening If an unambiguous match is available then `cd` can be used directly, without first invoking tab expansion. ```sh [~]> cd /w/s/d/et [C:\Windows\System32\drivers\etc]> cd ~/pr/pow/src [~\projects\PowerShell\src]> cd .sdk [~\projects\PowerShell\src\Microsoft.PowerShell.SDK]> _ ``` `AUTO_CD` works the same way when enabled. ```sh [~]> /w/s/d/et [C:\Windows\System32\drivers\etc]> ~/pr/pow/src [~\projects\PowerShell\src]> .sdk [~\projects\PowerShell\src\Microsoft.PowerShell.SDK]> _ ``` ### Navigation helper expansions Expansions are provided for the `cd+`, `cd-` and `up` (or `..`) aliases. When the `MenuCompletion` option is set to `$true` the completion offered is the index of each corresponding directory; the full path is displayed in the menu below. `cd-extras` will attempt to detect `PSReadLine` in order to set this option appropriately at start-up. For example: ```sh [C:\Windows\System32\drivers\etc]> up <[Tab]> [C:\Windows\System32\drivers\etc]> up 1 1. drivers 2. System32 3. Windows ‾‾‾‾‾‾‾‾‾‾‾ [C:\Windows\System32\drivers\etc]> up 3 3. Windows ‾‾‾‾‾‾‾‾‾‾‾ ``` It's also possible tab-complete these three commands (`cd+`, `cd-`, `up`) using a partial directory name. ```sh [~\projects\PowerShell\src\Modules\Shared]> up pr<[Tab]> [~\projects\PowerShell\src\Modules\Shared]> up '~\projects' [~\projects]> _ ``` ### Multi-dot and variable based expansions The multi-dot syntax provides tab completion into ancestor directories. ```sh [C:\projects\powershell\docs\git]> cd ...<[Tab]> [C:\projects\powershell\docs\git]> cd C:\projects\powershell\ ``` ```sh [C:\projects\powershell\docs\git]> cd .../<[Tab]> C:\projects\powershell\.git C:\projects\powershell\.vscode ‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾ C:\projects\powershell\demos C:\projects\powershell\docs C:\projects\powershell\test C:\projects\powershell\.github C:\projects\powershell\assets C:\projects\powershell\docker C:\projects\powershell\src C:\projects\powershell\tools ``` `Export-Up` (`xup`) recursively expands each parent path into a global variable with a corresponding name. Why? In combination with [CDABLE_VARS](#cdable_vars), it can be useful for navigating a deeply nested folder structure without needing to count `..`s. For example: ```sh [C:\projects\powershell\src\Modules\Unix]> xup Name Value ---- ----- Unix C:\projects\powershell\src\Modules\Unix Modules C:\projects\powershell\src\Modules src C:\projects\powershell\src powershell C:\projects\powershell projects C:\projects [C:\projects\powershell\src\Modules\Unix]> cd po<[Tab]> [C:\projects\powershell\src\Modules\Unix]> cd C:\projects\powershell\_ ``` might be easier than: ```sh [C:\projects\powershell\src\Modules\Unix]> cd ....<[Tab]> # or cd ../../../<[Tab]> [C:\projects\powershell\src\Modules\Unix]> cd C:\projects\powershell\_ ``` You can combine this with [AUTO_CD](#auto_cd) for great good: ```sh [C:\projects\powershell\src\Modules\Unix]> projects [C:\projects]> src [C:\projects\powershell\src]> _ ``` ## Additional helpers - Get-Stack - view contents of undo (`cd-`) and redo (`cd+`) stacks; limit output with the `-Undo` or `-Redo` switches - Get-Up - get the path of an ancestor directory, either by name or by traversing upwards n levels - Expand-Path - helper used for path segment expansion - Set-CdExtrasOption - [configure](#configure) cd-extras ## Note on compatibility ### Alternative providers The functionality discussed above is intended to work against the filesystem provider. Most things should work with other providers too though. ```sh [~]> cd hklm: [HKLM:]> cd so/mic/win/cur/windowsupdate [HKLM:\SOFTWARE\Microsoft\Windows\CurrentVersion\WindowsUpdate]> .. [HKLM:\SOFTWARE\Microsoft\Windows\CurrentVersion]> cd- [HKLM:\SOFTWARE\Microsoft\Windows\CurrentVersion\WindowsUpdate]> cd- 2 [~]> _ ``` ### OS X & Linux Functionality is tested and _should_ work on non-Windows operating systems. It's entirely likely you'll encounter some rough edges, though. In particular the best `$cde.MenuCompletion` setting may not be detected automatically; you might need to change it yourself. You'll also notice that cd-extras is quite permissive with respect to the casing of paths so path shortening won't work in cases where multiple possible path abbreviations differ only by case. # Get started ## Install ```sh Install-Module cd-extras Import-Module cd-extras # add to profile. e.g: Add-Content $PROFILE @("`n", "Import-Module cd-extras") ``` ## Configure Options provided: - _AUTO_CD_: `[bool] = $true` - Any truthy value enables auto_cd. - _CD_PATH_: `[array] = @()` - Paths to be searched by `cd` and tab expansion. Note: this is an array, not a delimited string. - _CDABLE_VARS_: `[bool] = $false` - `cd` and tab-expand into directory paths stored in variables without prefixing the variable name with `$`. - _NOARG_CD_: `[string] = '~'` - If specified, `cd` command with no arguments will change to this directory. - _MenuCompletion_: `[bool] = $true` (if PSReadLine available) - If truthy, indexes are offered as completions for `up`, `cd+` and `cd-` with full paths displayed in the menu - _DirCompletions_: `[array] = @('Push-Location', 'Set-Location', 'Get-ChildItem')` - Commands that participate in enhanced tab expansion for directories. - _FileCompletions_: `[array] = @()` - Commands that participate in enhanced tab expansion for files. - _PathCompletions_: `[array] = @()` - Commands that participate in enhanced tab expansion for any type of path. Either create a global hashtable, `cde`, with one or more of these keys _before_ importing the cd-extras module: ```sh $global:cde = @{ AUTO_CD = $false CD_PATH = @('~\Documents\', '~\Downloads') } Import-Module cd-extras ``` or call the `Set-CdExtrasOption` function after importing the module: ```sh Import-Module cd-extras Set-CdExtrasOption AUTO_CD $false Set-CdExtrasOption NOARG_CD '/' ``` |