变量
目录变量
# 获取相对目录的绝对路径(推荐)
set ROOT_DIR (realpath (dirname (status --current-filename))/..)
# 类似 bash 的写法
set ROOT_DIR (cd (dirname (status --current-filename))/.. && pwd -P)
# 获取当前目录的绝对路径
set CURRENT_DIR (realpath (dirname (status --current-filename)))