numbers/nvim/lua/plugins/telescope.lua

local actions = require("telescope.actions")
local previewers = require("telescope.previewers")
local builtin = require("telescope.builtin")
local Job = require("plenary.job")

local new_maker = function(filepath, bufnr, opts)
	filepath = vim.fn.expand(filepath)
	Job
		:new({
			command = "file",
			args = { "--mime-type", "-b", filepath },
			on_exit = function(j)
				local mime_type = vim.split(j:result()[1], "/")[1]
				if mime_type == "text" then
					previewers.buffer_previewer_maker(filepath, bufnr, opts)
				else
					vim.schedule(function()
						vim.api.nvim_buf_set_lines(bufnr, 0, -1, false, { "BINARY" })
					end)
				end
			end,
		})
		:sync()
end

require("telescope").setup({
	defaults = require("telescope.themes").get_ivy({
		dynamic_preview_title = true,
		vimgrep_arguments = {
			"rg",
			"--color=never",
			"--no-heading",
			"--with-filename",
			"--line-number",
			"--column",
			"--smart-case",
			"--trim",
		},
		preview = {
			filesize_limit = 5,
			timeout = 150,
			treesitter = true,
			title = false,
		},
		borderchars = { " ", " ", " ", " ", " ", " ", " ", " " },
		sorting_strategy = "ascending",
		layout_config = {
			prompt_position = "top",
		},
		pickers = {
			buffers = {
				mappings = {
					n = {
						["d"] = actions.delete_buffer,
					},
				},
				sort_mru = true,
				sort_lastused = true,
			},
			find_files = {
				find_command = { "fd", "--type", "f", "-c always", "-H", "--strip-cwd-prefix" },
				mappings = {
					n = {
						["cd"] = function(prompt_bufnr)
							local selection = require("telescope.actions.state").get_selected_entry()
							local dir = vim.fn.fnamemodify(selection.path, ":p:h")
							require("telescope.actions").close(prompt_bufnr)
							-- Depending on what you want put `cd`, `lcd`, `tcd`
							vim.cmd(string.format("silent lcd %s", dir))
						end,
					},
				},
				hidden = true,
			},
		},
		selection_caret = "→",
		color_devicons = true,
		file_ignore_patterns = { "node_modules", ".git" },
		set_env = { ["COLORTERM"] = "truecolor" },
		buffer_previewer_maker = new_maker,
		mappings = {
			i = {
				["<C-q>"] = actions.smart_send_to_qflist + actions.open_qflist,
				["<C-x>"] = false,
				["<C-o>"] = actions.select_horizontal,
				["<CR>"] = actions.select_default + actions.center,
				["<esc>"] = actions.close,
				["<C-j>"] = actions.move_selection_next,
				["<C-k>"] = actions.move_selection_previous,
				["<TAB>"] = actions.toggle_selection + actions.move_selection_next,
				["<C-s>"] = actions.send_selected_to_qflist,
				["<A-p>"] = require("telescope.actions.layout").toggle_preview,
			},
			n = {
				["<C-q>"] = actions.smart_send_to_qflist + actions.open_qflist,
				["<A-p>"] = require("telescope.actions.layout").toggle_preview,
			},
		},
		extensions = {
			file_browser = {
				hidden = true,
				theme = "ivy",
				dir_icon = "  ",
			},
		},
	}),
})

local delta = previewers.new_termopen_previewer({
	get_command = function(entry)
		return { "git", "-c", "core.pager=delta", "-c", "delta.side-by-side=false", "diff", entry.value .. "^!" }
	end,
})

Delta_git_commits = function(opts)
	opts = opts or {}
	opts.previewer = {
		delta,
		previewers.git_commit_message.new(opts),
		previewers.git_commit_diff_as_was.new(opts),
	}
	builtin.git_commits(opts)
end

Delta_git_bcommits = function(opts)
	opts = opts or {}
	opts.previewer = {
		delta,
		previewers.git_commit_message.new(opts),
		previewers.git_commit_diff_as_was.new(opts),
	}
	builtin.git_bcommits(opts)
end

local default_opts = { noremap = true, silent = true }
vim.api.nvim_set_keymap("n", "<F1>", "<cmd>Telescope help_tags<CR>", default_opts)
vim.api.nvim_set_keymap("n", "<F2>", "<cmd>Telescope file_browser<CR>", default_opts)
vim.api.nvim_set_keymap(
	"n",
	"<F3>",
	":lua require'telescope'.extensions.file_browser.file_browser({path = vim.fn.expand('%:p:h')})<CR>",
	default_opts
)
vim.api.nvim_set_keymap("n", "<F4>", "<cmd>Telescope buffers<CR>", default_opts)
vim.api.nvim_set_keymap("n", "<M-f>", "<cmd>Telescope live_grep<CR>", default_opts)
vim.api.nvim_set_keymap("n", "<M-g>", "<cmd>Telescope git_commits<CR>", default_opts)
vim.api.nvim_set_keymap("n", "<M-S-r>", "<cmd>Telescope resume<CR>", default_opts)

require("telescope").load_extension("fzf")
require("telescope").load_extension("file_browser")