ZSH：`.` 和 `source` 有什么区别？

Question

我曾经认为内置函数.和source是等效的。这个问题与我一致bash。但是我遇到了以下使用zsh：

desktop?  ~/pst  . env
/usr/bin/env:1: no such file or directory:  ^@^A^@^@^@X^Z@^@^@^@^@^@@^@^@^@^@^@^@^@\M-8q^@^@^@^@^@^@^@^@^@^@@^@8^@
/usr/bin/env:2: parse error near `)'
desktop?  ~/pst  source env
desktop?  ~/pst  file env
env: ASCII text

source做了我所期望的，但是.想要做什么？

Answer 1

man zshall 有答案：

   source file [ arg ... ]
          Same as `.', except that the current directory is always searched and is always searched first, before directories in $path.

例子：

desktop?  ~/pst  source /bin/env
/bin/env:1: no such file or directory: ^@^A^@^@^@X^Z@^@^@^@^@^@@^@^@^@^@^@^@^@\M-8q^@^@^@^@^@^@^@^@^@^@@^@8^@
/bin/env:2: parse error near `)'
desktop?  ~/pst  . env
/usr/bin/env:1: no such file or directory: ^@^A^@^@^@X^Z@^@^@^@^@^@@^@^@^@^@^@^@^@\M-8q^@^@^@^@^@^@^@^@^@^@@^@8^@
/usr/bin/env:2: parse error near `)'