Fish-like autocompletion

I tried to figure this out but couldn’t find out. Is there a way to get autocompletion like in the fish shell?

Basically what I am looking for is automatically searching the history on every keystroke, then showing a grey suggestion behind the cursor that can be accepted with <kbd>→</kbd> (if the cursor is at the end of the line).

We can get close with Set-PSReadLineKeyHandler -Key ArrowRight -Function HistorySearchBackward but it doesn’t show the suggestion and it prevents moving the cursor to the right.

[daxian-dbw]

I’m working on a prototype of this, and here is the zip package if any of you want to try it (any feedback would be very helpful!).

PSReadLine.zip

Currently:

• The only suggestion source is the PSReadLine history. The ultimate goal is to call into a prediction API in S.M.A that is powered by a prediction plugin.
• Currently there is no way to configure the style that the suggestion text is rendered with, the default style (color only) works OK with a black background. (of course, more work is needed here)
• VI mode - now the suggestion is disabled when switching to the command mode, and enabled when switching to insert mode.
• So far, I haven’t really focused on the VI/Emacs experience, so it could be pretty raw, and feedback is very welcome.

When using this PSReadLine, please add the following key binding to your profile:

Set-PSReadLineKeyHandler -Key "Ctrl+f" -Function ForwardWord

• Pressing RightArrow at the end of current typing will accept the suggestion text
• Pressing Ctrl+f at the end of current typing will accept a word from the suggestion text
• Pressing Ctrl+z will get you back to where you were before accepting all or part of the suggestion

Important note: don’t forget to unblock the zip file after you download it, otherwise you will face weird exceptions thrown from PowerShell.

[lzybkr]

@Southclaws - do you already set these bindings (which I think should be changed to be the default)?

Set-PSReadLineKeyHandler -Key UpArrow -Function HistorySearchBackward
Set-PSReadLineKeyHandler -Key DownArrow -Function HistorySearchForward