Remove XML Tag Blocks from the command line with sed
source link: https://daveceddia.com/remove-xml-tags-with-sed/
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Remove XML Tag Blocks from the command line with sed
November 11, 2020I had an xml file that looked something like this, and I wanted to remove all the <meta> tags from it:
<xml>
<note>
<to>A</to>
<from>B</from>
<meta>
junk
</meta>
<meta>
more junk
</meta>
<body>
keep this
</body>
</note>
...
</xml>The sed utility made quick work of it.
Some caveats: The file was already well-formatted, and these meta tags spanned multiple lines.
If your file is a jumbled mess, you might want to format it with prettier first.
Manipulating XML or HTML with tools like sed is not generally a great idea. For a general-purpose solution that can deal with all valid XML syntax you’d need a proper XML parser. But if your file is in the right shape, sed can be a quick and dirty way to get the job done.
Here’s the command I ran:
sed -i '' -e '/<meta>/,/<\/meta>/d' my-file.xmlThe -i means “in-place”. It will change the file on disk. The '' is the name of the backup file – none, in this case. The Mac version of sed requires this name, though. If you’re on another system you might not need this.
The -e says to execute the regular expression that follows.
Let’s break down the expression: /<meta>/,/<\/meta>/d
The comma in the middle tells sed to look for a range of lines, and on either side of the comma is a regex. The d at the end means “delete this range”. Read about ranges in sed for more stuff you can do with them.
So we’re looking for lines starting with <meta> and ending with </meta>, and the slash needs to be escaped in the second regex, so we have /<\/meta>/.
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Nah. sed -e '##d' server.xml will not match this,
Does not work.
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