uncolorized git diff commands

[sineptic]

Description

I use difftastic on my system as diff tool. When I call git diff in terminal output is colorized, but when I run :Telescope git_bcommits(or other command with preview) output only with 2 colors. I try to use difft --color=always, but telescope print escape symbols.

Neovim version

NVIM v0.10.0
Build type: Release
LuaJIT 2.1.1702233742

Operating system and version

OS: Arch Linux | Kernel: 6.8.5-arch1-1

Telescope version / branch / rev

telescope 0.1.7

checkhealth telescope

==============================================================================
telescope: health#telescope#check

Checking for required plugins ~
- OK plenary installed.
- OK nvim-treesitter installed.

Checking external dependencies ~
- OK rg: found ripgrep 14.1.0
- OK fd: found fd 10.1.0

===== Installed extensions ===== ~

Steps to reproduce

• install difftastic
• in ~/.gitconfig add

[diff]
    external = difft

• try git diff in terminal(check that it works)
• in neovim run :Telescope git_bcommits

Expected behavior

1. colorize diff
2. don't print escape symbols

Actual behavior

opposite

Minimal config

local lazypath = vim.fn.stdpath("data") .. "/lazy/lazy.nvim"
if not (vim.uv or vim.loop).fs_stat(lazypath) then
  vim.fn.system({
    "git",
    "clone",
    "--filter=blob:none",
    "https://github.com/folke/lazy.nvim.git",
    "--branch=stable", -- latest stable release
    lazypath,
  })
end
vim.opt.rtp:prepend(lazypath)

require("lazy").setup({
    {
        'nvim-telescope/telescope.nvim',
        tag = '0.1.7',
        dependencies = {
            'nvim-lua/plenary.nvim'
        },
    },
})