git_prompt_filter.lua

function git_prompt_filter_new()

    local start_filter = os.clock()

    -- Colors for git status
    local colors = {
        clean = "\x1b[1;37;40m",
        dirty = "\x1b[31;1m",
    }

    local git_info = {}
    local proc = io.popen("git rev-parse --git-dir --short --abbrev-ref HEAD 2>nul")
    if proc then
        for line in proc:lines() do
            table.insert(git_info, line)
        end

        proc:close()
    end

    if #git_info == 0 then
        clink.prompt.value = string.gsub(clink.prompt.value, "{git}", "")
        print(string.format("elapsed time: %.2f", os.clock() - start_filter))
        return false
    end

    local branch = git_info[2]
    local color = get_git_status() and colors.clean or colors.dirty

    clink.prompt.value = string.gsub(clink.prompt.value, "{git}", color.."("..branch..")")
    print(string.format("elapsed time: %.2f", os.clock() - start_filter))
    return false
end