ltsh

small utility to perform a type-check on shell-pipelines

---

Example

[~]$ ltsh <<< 'echo -n $PATH | xargs stat -c %x | sort -n'

--- BEGIN TYPE-ANALYSIS ---

* unknown stdin-type for `echo -n $PATH`

* !====> TYPE MISMATCH !! <====!
    ——————————
  ....`echo -n $PATH` outputs
<Seq Path~<Seq PathSegment~<Seq Char>>~<SepSeq Char '/'>~<Seq Char>>~<SepSeq Char ':'>~<Seq Char>
    ———————————
  .... `xargs stat -c %x` expects
<Seq Path~<Seq PathSegment~<Seq Char>>~<SepSeq Char '/'>~<Seq Char>>~<SepSeq Char '\n'>~<Seq Char>
    ——————————

* !====> TYPE MISMATCH !! <====!
    ——————————
  ....`xargs stat -c %x` outputs
<Seq Date~ISO-8601~<Seq Char>>~<SepSeq Char '\n'>~<Seq Char>
    ———————————
  .... `sort -n` expects
<Seq ℕ>~<Seq <PosInt 10 BigEndian>~<Seq <Digit 10>~Char>>~<SepSeq Char '\n'>~<Seq Char>
    ——————————

--- END TYPE-ANALYSIS ---

Use as Zsh-extension

To automatically check every pipeline entered during interactive shell use, add the following hook to your .zshrc:

preexec() {
    ltsh <<< "$1"
}

Limitations

• only parses pipelines
• ignores quoting rules & expansions
• regex-based typedb implementation (slow & incapable)

License

GPLv3