Improve tab completion method (respect for the behaviors of major interactive shells in Unix)

[tats-u]

Description of the new feature/enhancement

Consider the case that only these sub-directories are in the current directory:

• 📂 directory_barbarbarbarbarbarbarbarbarbar
• 📂 directory_foofoofoofoofoofoofoofoofoofoo
• 📂 directory_foofoofoofoofoofoofoofoofoofoo_001
• 📂 directory_foofoofoofoofoofoofoofoofoofoo_002
• ︙
• 📂 directory_foofoofoofoofoofoofoofoofoofoo_100
• 📂 directory_quxquxquxquxquxquxquxquxquxqux

If you want to enter the directory_quxquxquxquxquxquxquxquxquxqux by cd, the current behavior of PSReadLine is:

1️⃣

PS> cd␣

↓ Tab

2️⃣

PS> cd␣.\directory_barbarbarbarbarbarbarbarbarbar

\AHHHHH!!! IT'S A PAIN OF AΣΣ TO DELETE THE SOOOO LONG SUFFIX!!!/

↓ Tab

2️'

PS> cd␣.\directory_foofoofoofoofoofoofoofoofoofoo

↓ Tab

2️''

PS> cd␣.\directory_foofoofoofoofoofoofoofoofoofoo_001

\HOW MANY TIMES DO I HAVE TO PRESS TAB!?!?/

The current behavior is not suitable for this situation.

Proposed technical implementation details (optional)

The first Tab should complete only the common prefix like (the new state 1️⃣' is added):

1️⃣

PS> cd␣

↓ Tab

1️⃣'

PS> cd␣.\directory_

↓ Tab

2️⃣

PS> cd␣.\directory_barbarbarbarbarbarbarbarbarbar

↓ Tab

2️'

PS> cd␣.\directory_foofoofoofoofoofoofoofoofoofoo

If you want to enter directory_quxquxquxquxquxquxquxquxquxqux, you just have to press q then Tab when 1️⃣'.

FYI: Bash's behavior:

1. Completes only the common prefix (1️⃣')
2. Shows candidates
3. Shows candidates
4. ︙

The behavior of Fish and Zsh:

1. Complete only the common prefix (1️⃣')
2. Shows candidates
3. Choose the 1st candidate (2️⃣)
4. Choose the 2nd one (2️⃣')
5. ︙

[daxian-dbw]

@tats-u What you ask is already available, all you need is to use the Emacs edit mode by Set-PSReadLineOption -EditMode Emacs

[tats-u]

Now we just need to clarify this in the document. Thank you for the information.