$ show Aloxaf/fzf-tab
fzf-tab is a zsh plugin that replaces the default completion menu with an fzf-based interactive selector. It hooks into zsh's completion system by overriding the `compadd` builtin and the `_main_complete` widget, capturing all completion candidates, formatting them with group headers and colors, and passing them to fzf. The user's selection is then applied back to the command line. The plugin supports multiple selection, continuous completion (e.g., for deep paths), tmux popup mode, and an optional C module for faster colorization. The architecture is a single zsh script (`fzf-tab.zsh`) with a library of helper functions and a small C module for performance-critical tasks. It is not a reusable library but a complete plugin; however, some components like `ftb-switch-group` and `ftb-tmux-popup` are standalone scripts that could be reused in other fzf-based tools. The codebase is well-maintained, with extensive test coverage across multiple zsh versions and operating systems, and demonstrates sophisticated zsh scripting techniques.
The LLM identified 3 files worth highlighting for reuse:
A standalone zsh script invoked by fzf's `reload` action to switch between groups of completion candidates. It reads the current completion list, detects group markers (ANSI SGR codes), and prints only the lines belonging to the selected group. It supports styles for the active group header (bold, underline, etc.) and persists the current group index across reloads. This script is reusable in any fzf-based workflow that needs to partition and switch between groups of items.
A wrapper script that runs fzf inside a tmux popup window. It calculates popup dimensions and position based on cursor location and window size, and can be used both as a standalone filter (e.g., `ls | ftb-tmux-popup`) and as the fzf command for fzf-tab. It handles tmux-specific display adjustments and popup padding. This script is self-contained and reusable in any context where tmux popup integration with fzf is desired.
A zsh function that computes the initial query string for fzf based on the completion candidates. It supports multiple strategies: finding the longest common prefix among descriptions, extracting the current input prefix, or using the first candidate. The algorithm for finding the common prefix is particularly clever: it interposes characters from the two strings and uses a PCRE regex to find the longest run of identical pairs. This function is tightly coupled to the plugin's data structures but the pattern of computing queries from completion data is instructive.