Comment by tmsbrg | Hacker News Reader

Comment by tmsbrg | Hacker News Reader

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Definitely seconding pup, love it and it's easy to use with css selectors. Often use it to parse HTML tables of data on random websites into usable CSVs / etc.

xq looks interesting for pure XML, will add it to my notes.

Regarding xmlstarlet, I don't use it much but here's some stuff from my notes:

XML filter on xpath: xmlstarlet sel -t -c configuration/appender logback.xml; echo

XML editing: xmlstarlet ed -d configuration/root -d configuration/logger -s configuration -t elem -n woof -v 'Woof!' logback.xml

The last one deletes elements given by xpath "configuration/root" and "configuration/logger", then adds a new element with the contents <woof>Woof!</woof> under the xpath "configuration".

> Regarding xmlstarlet, I don't use it much but here's some stuff from my notes:

It is also handy doing at some PoC work, and then one can feed it "-C" to output the backing xslt for use elsewhere

    $ echo '<a><b>hello</b></a>' | xmlstarlet sel -t -m /a -c 'count(*)' --nl
    1
    $ echo '<a><b>hello</b></a>' | xmlstarlet sel -C -t -m /a -c 'count(*)' --nl
    <?xml version="1.0"?>
    <xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform" version="1.0">
      <xsl:output omit-xml-declaration="yes" indent="no"/>
      <xsl:template match="/">
        <xsl:for-each select="/a">
          <xsl:copy-of select="count(*)"/>
          <xsl:value-of select="'&#10;'"/>
        </xsl:for-each>
      </xsl:template>
    </xsl:stylesheet>

using `xmlstarlet` to generate XPATHs to visualize document structure

https://github.com/TomConlin/xpath2dot

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