Bash检测循环中的错误，然后继续处理

Question

我想处理包含在文本文件中的自制软件公式列表。如果出现安装错误（例如已安装，错误的公式名称），我希望它写入错误，但继续处理。 Github project。

我有什么至今：

... 
# process list of formulas that have been installed 
for i in $(cat $FILE) ; do 

    echo "Installing $i ..." 

    # attempt to install formula; if error write error, process next formula 

    brew install $i 

done 
... 

我该怎么办呢？

Answer 1

它有帮助吗？

... 
# process list of formulas that have been installed 
for i in $(< "$FILE") ; do 

    echo "Installing $i ..." 

    # attempt to install formula; if error write error, process next formula 

    brew install "$i" || continue 

done 
... 

注意，如果配方中含有空格则for循环将分割线。这可能会写得更好：

... 
# process list of formulas that have been installed 
while read i ; do 

    # Jump blank lines 
    test -z "$i" && continue 

    echo "Installing $i ..." 

    # attempt to install formula; if error write error, process next formula 

    brew install "$i" || continue 

done < "$FILE" 
... 

Answer 2

这应该很简单。

# process list of formulas that have been installed 
for i in $(<"$FILE") ; do 

    echo "Installing $i ..." 

    # attempt to install formula; if error write error, process next formula 

    if ! brew install $i 
    then 
     echo "Failed to install $i" 
     continue 
    fi 

done 

添加一个if语句安装部分将检查的brew退出状态，如果它失败了，然后将报告和错误并继续。