Reading keys from a XML file into a shell array - arrays

Question

Im trying to parse an xml file and get all tag values and fonts values and add them to an associative arrays. My issue is that the array doesn't seem to be having the values assigned to it properly
#!/bin/bash
GAME_NAME="."
LOCALIZATION_DIR="$GAME_NAME/assets/data/localization"
INDEX=0
OUTPUT_KEYS=()
# parse english xml for tags and font names first
for str in $(echo "cat //strings/string/#key" | xmllint --shell "$LOCALIZATION_DIR/en.xml")
do
echo "$str"
echo "--"
OUTPUT_KEYS[$index]="$str"
((INDEX++))
done
echo ${OUTPUT_KEYS[0]}
The last echo just echos the end of the tag > A little confused on how arrays should be working in shell or if there is a better way to approach this.
My XML looks like this.
<?xml version="1.0" encoding="UTF-8" ?>
<strings version="5.6051.4-en">
<!--<StarLineUI>-->
<!-- Menu -->
<string key="betProper" value="Bet" fonts="uiAccountTitle" />
<string key="linesProper" value="Lines" fonts="uiAccountTitle" />
<string key="spinsProper" value="Spins" fonts="uiAccountTitle" />
<string key="bet" value="BET" fonts="uiMenuTitle, uiAccountTitle" />
<string key="line" value="LINE" fonts="uiMessage" />
</strings>
I'm trying to build a solution that works with GNU bash, version 3.2.57(1)-release (x86_64-apple-darwin16)

Answer 1

If you have bash 4.0 or newer:
readarray -t output_keys \
< <(xmlstarlet sel -t -m '//strings/string[#key]' -v #key -n <in.xml)
echo "${output_keys[0]}"
Otherwise:
output_keys=( )
while IFS= read -r line; do
output_keys+=( "$line" )
done < <(xmlstarlet sel -t -m '//strings/string[#key]' -v #key -n <in.xml)
In either of these, the output of xmlstarlet is just the keys you're trying to extract, as in:
betProper
linesProper
spinsProper
bet
line
...and this can be iterated over as you'd expect:
for key in "${output_keys[#]}"; do
echo "Found key: $key"
done
If you don't have xmlstarlet, you can run the XSLT equivalent to the above command line; if you have a stylesheet print-strings.xslt with the following contents:
<?xml version="1.0"?>
<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform" xmlns:exslt="http://exslt.org/common" version="1.0" extension-element-prefixes="exslt">
<xsl:output omit-xml-declaration="yes" indent="no"/>
<xsl:template match="/">
<xsl:for-each select="//strings/string[#key]">
<xsl:call-template name="value-of-template">
<xsl:with-param name="select" select="#key"/>
</xsl:call-template>
<xsl:value-of select="'
'"/>
</xsl:for-each>
</xsl:template>
<xsl:template name="value-of-template">
<xsl:param name="select"/>
<xsl:value-of select="$select"/>
<xsl:for-each select="exslt:node-set($select)[position()>1]">
<xsl:value-of select="'
'"/>
<xsl:value-of select="."/>
</xsl:for-each>
</xsl:template>
</xsl:stylesheet>
...then you can run:
xsltproc print-strings.xslt in.xml
...to get the same output as xmlstarlet sel -t -m '//strings/string[#key]' -v #key -n <in.xml.