shell 脚本 if 语句不起作用

Question

我写了那个脚本，但如果我运行它，我会得到这个输出：

./autotex: line 7: syntax error near unexpected token `then'
./autotex: line 7: `            then'

脚本是：

#!/bin/bash

while [ $key = "q"]; do

        dateTex = grep $1.tex| cut -b 43 - 54
        datePdf = grep $1.pdf| cut -b 43 - 54
        if[$dateTex !eq $datePdf]
        then
                pdflatex $1.tex
        fi

        read -t 1 -n 1 key

done

Answer 1

while [ $key = "q"]; do

应该

while [ $key = "q" ]; do

和

if[$dateTex !eq $datePdf]

应该

if [ "$dateTex" != "$datePdf" ]

更何况

dateTex = grep $1.tex| cut -b 43 - 54

另一条类似的线被打破，应该是这样的：

dateTex=$(grep something $1.tex | cut -b 43-54)