towards #35

[blaggacao]

#35

---

Do not merge before pre-commit/identify#129 landed in a release which is then acctually used here.

[roberth]

I don't think we want to check unsupported shells though. https://github.com/koalaman/shellcheck/blob/cfd68ee0c2ebfd0ab08a1d4bf628162b454dc207/src/ShellCheck/Parser.hs#L3236

[blaggacao]

    goodShells = [
        "sh",
        "ash",
        "dash",
        "bash",
        "bats",
        "ksh"
        ]

    badShells = [
        "awk",
        "csh",
        "expect",
        "perl",
        "python",
        "ruby",
        "tcsh",
        "zsh"
        ]

[blaggacao]

The problem will be *.sh extension since I believe identity gives precedence to extension over shebang.

---

I was wrong:

If executable, the shebang is read and the interpreter interpreted

---

So we need to get those good shells upstreamed as extension (except .sh) and interpreter.

→ pre-commit/identify#129

[blaggacao]

Do not merge before pre-commit/identify#129 landed in a release which is then acctually used here.

[domenkozar]

identify now just needs a bump in nixpkgs

[domenkozar]

Going to fix as part of #65 that will include the bump.