feat(fzf): add fzf-lua integration for buffer and file selection

[xeon826]

File picker using fzf-lua to select git files or open buffers to add to the prompt. Use it like so:

		vim.keymap.set("t", "<C-f>", function()
			require("opencode").fzf.select_files()
		end, opts)
		vim.keymap.set("t", "<C-b>", function()
			require("opencode").fzf.select_buffers()
		end, opts)

[nickjvandyke]

Neat, thank you! I have thought about something like this.

I think it'd be more powerful and reusable the way sidekick.nvim does it. Is that possible in fzf-lua? That could get us started on supporting other pickers too. 🙂

[xeon826]

I created another branch using my fork that more resembles the functionality you're referring to but it seems opencode is lacking an endpoint for submitting file paths so I created an issue and rough draft branch of opencode for adding that.

[nickjvandyke]

I think that missing feature is fine for now - it's an optimization, not a requirement. And is consistent with other filepath references anyway.

[naowalrahman]

Neat, thank you! I have thought about something like this.

I think it'd be more powerful and reusable the way sidekick.nvim does it. Is that possible in fzf-lua? That could get us started on supporting other pickers too. 🙂

Just came up with a neat snacks.picker() action to send context from snacks.picker to opencode, similar to the sidekick.nvim integration:

return {
  "folke/snacks.nvim",
  opts = {
    picker = {
      actions = {
        ---@param picker snacks.Picker
        opencode_send = function(picker)
          local context = {}

          for _, item in ipairs(picker:selected { fallback = true }) do
            local entry = ""

            -- Build file reference with optional line range
            if item.file then
              entry = "@" .. item.file
              if item.pos then
                local has_range = item.end_pos and item.end_pos[1] ~= item.pos[1]
                entry = entry .. (" L%d"):format(item.pos[1])
                if has_range then entry = entry .. ("-L%d"):format(item.end_pos[1]) end
              end
            end

            -- Append text content
            if item.text and item.text ~= "" then
              entry = entry .. (item.file and "\n  " or "") .. item.text
            end

            context[#context + 1] = entry
          end

          require("opencode").prompt(table.concat(context, "\n") .. "\n")
        end,
      },
      win = {
        input = {
          keys = {
            ["<a-a>"] = {
              "opencode_send",
              mode = { "n", "i" },
            },
          },
        },
      },
    },
  },
}

Press Alt+A on current item/selected items in snacks.picker to send context to opencode.

Not sure if fzf-lua supports actions like snacks.picker, but I think picker integrations can be handled on the picker-side like this instead of plugin-side.