Depurando scripts shell: Verificando a sintaxe sem executar

Question

Existe alguma opção que posso dar para apenas verificar a sintaxe de um shell script [bash] para verificar a sintaxe dele, mas na verdade não executar nada nem causar algum dano potencial?

    

Answer 1

Na página bash(1) man:

-n      Read commands but do not execute them. This may be used to check a
        shell script for syntax errors. This is ignored by interactive shells.

    

Answer 2

Experimente o link

$ shellcheck myscript.sh

    In myscript.sh line 590:
    for f in $*; do
    ^-- SC1009: The mentioned parser error was in this for loop.


    In myscript.sh line 617:
        if [ ! -e "$somefile".vcf ]; then
        ^-- SC1046: Couldn't find 'fi' for this 'if'.
        ^-- SC1073: Couldn't parse this if expression.


    In myscript.sh line 1026:
    done
    ^-- SC1047: Expected 'fi' matching previously mentioned 'if'.
        ^-- SC1072: Unexpected keyword/token. Fix any mentioned problems and try again.

Bem, isso não me disse que o 'se' estava faltando na linha 634, mas foi muito útil.