在多行命令中的Bash脚本中进行注释 [英] Commenting in a Bash script inside a multiline command

问题描述

如何在脚本的以下各行中添加注释?

How can I comment on each line of the following lines from a script?

cat ${MYSQLDUMP} | \
sed '1d' | \
tr ",;" "\n" | \
sed -e 's/[asbi]:[0-9]*[:]*//g' -e '/^[{}]/d' -e 's/""//g' -e '/^"{/d' | \
sed -n -e '/^"/p' -e '/^print_value$/,/^option_id$/p' | \
sed -e '/^option_id/d' -e '/^print_value/d' -e 's/^"\(.*\)"$/\1/' | \
tr "\n" "," | \
sed -e 's/,\([0-9]*-[0-9]*-[0-9]*\)/\n\1/g' -e 's/,$//' | \
sed -e 's/^/"/g' -e 's/$/"/g' -e 's/,/","/g' >> ${CSV}

如果我尝试添加评论，例如:

If I try and add a comment like:

cat ${MYSQLDUMP} | \ # Output MYSQLDUMP File

我得到:

#: not found

可以在这里发表评论吗?

Is it possible to comment here?

推荐答案

这会有一些开销，但是从技术上讲，它确实回答了您的问题:

This will have some overhead, but technically it does answer your question:

echo abc `#Put your comment here` \
     def `#Another chance for a comment` \
     xyz, etc.

特别是对于管道，有一个干净的解决方案，没有任何开销:

And for pipelines specifically, there is a clean solution with no overhead:

echo abc |        # Normal comment OK here
     tr a-z A-Z | # Another normal comment OK here
     sort |       # The pipelines are automatically continued
     uniq         # Final comment

请参阅堆栈溢出问题 如何为多行命令添加行注释

See Stack Overflow question How to Put Line Comment for a Multi-line Command.

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