Скачать или смотреть How to Reverse Autocomplete in Fish Shell

Discover how to customize the Fish Shell autocomplete feature to reverse the output order for specific commands and directories. Learn the limitations and necessary steps for implementation.
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This video is based on the question https://stackoverflow.com/q/64970272/ asked by the user 'Yorokobii' ( https://stackoverflow.com/u/5924642/ ) and on the answer https://stackoverflow.com/a/64980577/ provided by the user 'faho' ( https://stackoverflow.com/u/3150338/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions.

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Introduction

If you're a Fish Shell user, you might be familiar with its powerful autocomplete feature. However, have you ever wished the autocomplete suggestions appeared in reverse order? Imagine having a folder structure where you prefer to see the last created or used items first.

In this guide, we will explore the possibility of reversing the autocomplete output in Fish Shell for specific commands. While the capability may seem straightforward, there are some limitations to be aware of. Let’s dive in!

Understanding the Problem

The Scenario

Suppose you have a folder structure like this:

[[See Video to Reveal this Text or Code Snippet]]

When you navigate to folder A and use the command:

[[See Video to Reveal this Text or Code Snippet]]

The typical output might look like this:

[[See Video to Reveal this Text or Code Snippet]]

The Wish

Instead of this output, you'd prefer to see:

[[See Video to Reveal this Text or Code Snippet]]

This leads to the question: Is there a way to reverse the autocomplete output in Fish Shell?

The Solution

The Short Answer

Unfortunately, the short answer to reversing autocomplete output in Fish Shell is no.

The Long Answer

While you cannot directly reverse the default autocomplete behavior for built-in functions like cd, you can maintain the existing order or create custom completions. Here are some options you should consider:

1. Using complete --keep-order

If you create your custom completions using the complete command combined with --keep-order, you can maintain the order of completion suggestions.

Example of maintaining order:

[[See Video to Reveal this Text or Code Snippet]]

However, keep in mind that this requires a significant amount of effort since it involves:

Modifying your entire completion script for the specific command.

Fish Shell doesn’t provide a direct way to apply this to its built-in file completions.

2. Creating Custom Completions

If you're familiar with scripting, you can write custom scripts that handle directory completions in a way that meets your needs. For instance:

Write custom logic to list directories in reverse order.

Use these scripts to populate the completions based on your requirements.

Implementation Process

Here are the basic steps to get started with creating a custom completion script:

Understand the Fish completion scripts: Familiarize yourself with how Fish Shell processes completions.

Create a custom function: Write a function that outputs directories in the desired order.

Register the function: Use the complete command to associate this function with the cd command or any other command you are targeting.

Test: Make sure to test the functionality to ensure it behaves as expected.

Conclusion

The desire to reverse the autocomplete output in Fish Shell is understandable, especially for users managing vast directories. However, the limitations of Fish’s built-in capabilities mean that you might need to resort to custom scripts to achieve your goal fully.

Remember, while Fish Shell’s autocomplete provides convenient suggestions, customizing it for specific needs like reversing the output requires careful planning and a bit of effort.

Feel free to share your experiences and any workarounds you might have discovered in the comments below!