Heredoc内盒有问题.Bash脚本 [英] Problem with heredoc inside case. Bash script

问题描述

如果在我的终端上写

cat <<-EOF
hello
EOF

我得到了预期的输出，你好.

I get the expected output, hello.

现在，在我正在编写的脚本中，我已经拥有

Now, In a script I'm writing I have

PARAMS=""
while (( "$#" )); do
  case "$1" in
    -h|--help)
      cat <<-EOF
      hello
      EOF
      exit 0  
      ;;
    --) # end argument parsing
      shift
      ...

但是vscode突出显示了 cat<< -EOF 行之后的所有内容，就好像它们都是字符串一样，基本上忽略了EOF.实际上，当我运行脚本时，我得到了一个

But vscode is highlighting everything after the line cat<<-EOF as if it all was a string, basically ignoring the EOF. And in fact when I run the script I get a

syntax error: unexpected end of file

错误

如果我像这样缩进代码:

if I indent the code like this:

while (( "$#" )); do
  case "$1" in
    -h|--help)
      cat <<EOF
      ciao
EOF
      exit 0  
      ;;
    --) # end argument parsing
      shift
      ...

在左侧带有EOF的情况下，vscode可以识别它，将文件的其余部分作为普通的bash脚本显示出来，并且可以正常工作.但是从缩进角度来看，这很糟糕.有没有办法用cat命令缩进EOF?

with EOF on the left, vscode recognises it as it should, hilighting the rest of the file as a normal bash script and everithing works. But indentation-wise this sucks. Is there a way to indent EOF with the cat command?

推荐答案

-EOF必须位于该行的开头.当我漂亮地打印脚本并无意缩进Heredoc终止符时，我犯了几次这个错误.

The -EOF has to be at the beginning of the line. I've made that mistake several times when I prettyprint a script and inadvertently indent the heredoc terminator.

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