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HOAXCoQS.xslt
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<?xml version="1.0" encoding="UTF-8"?>
<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
xmlns:xs="http://www.w3.org/2001/XMLSchema"
xmlns:array="http://www.w3.org/2005/xpath-functions/array"
xmlns:hoaxcoqs="https://github.com/sydb/HOAXCoQS/"
xpath-default-namespace="http://www.w3.org/1999/XSL/Transform"
version="3.0">
<!--
HOAXCoQS: Highly Opinionated Approximative XSLT Code Quality Score
Idea by Gerrit Imsieke, posted to xml.com slack channel 2020-05-08.
Coded into XSLT by Syd Bauman. I started 05-08, but finished 05-09.
Copyleft 2020 by Syd Bauman and Gerrit Imsieke.
-->
<!--
Revision history
======== =======
2020-05-08 ~23:50 by Syd Bauman: started
2020-05-09 ~00:05 by Syd Bauman: first draft code complete
2020-05-09 ~00:20 by Syd Bauman: comments added, posted to slack
2020-05-09 ~00:25 by Syd Bauman: bug fix: count only XSL elements for
the denominator. Also factor out common divide by
$total in the calculation.
2020-05-09 ~00:30 by Syd Bauman: Add this revision hx.
2020-05-10 ~08:00 UTC by Gerrit Imsieke: Process all XSL files in the
directory as specified by the $dir param.
Also, output the score as an xsl:message instead
of text.
2020-05-10 ~10:00 UTC by Gerrit Imsieke: JSON output, accept
space-separated list of directories in dir
2020-05-10 ~16:00 UTC by Gerrit Imsieke: Use 'good' and 'bad' modes
instead of 'good' and 'bad' keys in order to support
weights when counting occurrences. (Version 1.2)
2020-05-10 ~18:40 UTC by Gerrit Imsieke: Added assertions that weights
not be negative. We could accept both positive and
negative weights. Then we wouldn’t get separate 'good'
and 'bad' results.
-->
<!--
Version 1.2: Weight support. The weights (default: 1) can be
customized by importing the stylesheet, as demonstrated
in xslt1fan.xsl.
The program’s HOAXCoQS (including xslt1fan.xsl) is now 70.15.
Version 1.1: Program can alternatively process directories.
The program’s HOAXCoQS is now 47.92.
Version 1: algorithm as (I think) Gerrit used on his spreadsheet, but
works only on a single XSLT file. BTW, the HOAXCoQS for this program
is 11.76.
Future plans:
* improve algorithm, including weighting of constructs and using
attributes (perhaps weighted) in the denominator
* use weighted counts of # of “words” inside comments or <xd:doc>
as part of good
* follow <import> and <include>, so those stylesheets are counted,
too
* wait until 2021-04-01 and then post it and have a ball!
Things I don’t currently plan to implement, but might be a good idea:
* Count times that atomics are compared using ‘=’, not “eq” (etc.)
* Examine whitespace and count as bad anything not indented properly
-->
<xsl:mode name="bad" on-no-match="shallow-skip"/>
<xsl:mode name="good" on-no-match="shallow-skip"/>
<xsl:template match="value-of | for-each | apply-templates/with-param[not(@tunnel = ('yes', '1', 'true'))]
| template[@match][empty(@name)]/param[not(@tunnel = ('yes', '1', 'true'))]"
mode="bad" as="xs:double+">
<xsl:sequence select="1"/>
<xsl:next-match/>
</xsl:template>
<xsl:template match="for-each-group | next-match | apply-templates | sequence | assert | @as | @tunnel"
mode="good" as="xs:double+">
<xsl:sequence select="1"/>
<xsl:next-match/>
</xsl:template>
<xsl:param name="dir" as="xs:string?" select="()">
<!-- A file URI for a directory that is recursively scanned.
If the $dir param contains whitespace, each token will
be treated as a distinct directory to process.
All files whose names end in '.xsl' or '.xslt' are processed.
If the files are not well-formed, they won’t be processed.
If $dir, or rather, the tokens, are relative paths, they
are resolved against the base URI of this stylesheet.
If this parameter is given, a potential source document is
ignored, and Saxon needs to be invoked with the -it switch
(no initial template name though).
-->
</xsl:param>
<xsl:output method="json"/>
<xsl:template match="/" as="map(xs:string, item())">
<xsl:variable name="total" select="count( //xsl:* )" as="xs:integer"/>
<xsl:variable name="weighted" as="map(xs:string, xs:anyAtomicType)"
select="hoaxcoqs:apply-weights(.)"/><!-- a map with a 'good'
and a 'bad' key, and (possibly weighted) counts as values -->
<xsl:variable name="counts" as="map(xs:string, item())?"
select="hoaxcoqs:counts($total, $weighted?good, $weighted?bad, document-uri(.))"/>
<xsl:if test="empty($dir)">
<xsl:call-template name="hoaxcoqs:message">
<xsl:with-param name="counts" select="$counts"/>
</xsl:call-template>
</xsl:if>
<xsl:sequence select="$counts"/>
</xsl:template>
<xsl:template name="hoaxcoqs:message">
<xsl:param name="counts" as="map(xs:string, item())"/>
<xsl:message select="'The HOAXCoQS score of',
string-join(array:flatten($counts?uri), ' '), 'is',
format-number( hoaxcoqs:score($counts?total, $counts?good, $counts?bad), '###.99')"/>
</xsl:template>
<xsl:template name="xsl:initial-template">
<xsl:variable name="individual-results" as="map(xs:string, item())*">
<xsl:for-each-group group-by="base-uri()"
select="tokenize($dir) ! collection(. || '?recurse=yes;select=*.(xsl|xslt);on-error=warning')">
<xsl:apply-templates select="."/>
</xsl:for-each-group>
</xsl:variable>
<xsl:variable name="counts" as="map(xs:string, item())"
select="hoaxcoqs:counts(
sum($individual-results ! ?total),
sum($individual-results ! ?good),
sum($individual-results ! ?bad),
tokenize($dir) ! resolve-uri(.)
)"/>
<xsl:call-template name="hoaxcoqs:message">
<xsl:with-param name="counts" select="$counts"/>
</xsl:call-template>
<xsl:sequence select="$counts"/>
</xsl:template>
<xsl:function name="hoaxcoqs:score" as="xs:double">
<xsl:param name="total" as="xs:integer"/>
<xsl:param name="good" as="xs:double"/>
<xsl:param name="bad" as="xs:double"/>
<xsl:sequence select="100 * ($good - $bad) div $total"/>
</xsl:function>
<xsl:function name="hoaxcoqs:counts" as="map(xs:string, item())">
<xsl:param name="total" as="xs:integer"/>
<xsl:param name="good" as="xs:double"/>
<xsl:param name="bad" as="xs:double"/>
<xsl:param name="uris" as="xs:anyURI+"/>
<xsl:map>
<xsl:map-entry key="'total'" select="$total"/>
<xsl:map-entry key="'good'" select="$good"/>
<xsl:map-entry key="'bad'" select="$bad"/>
<xsl:map-entry key="'uri'" select="array { $uris }"/>
<xsl:map-entry key="'score'" select="hoaxcoqs:score($total, $good, $bad)"/>
</xsl:map>
</xsl:function>
<xsl:function name="hoaxcoqs:apply-weights" as="map(xs:string, xs:anyAtomicType)">
<xsl:param name="stylesheet" as="document-node(element(*))?"/>
<xsl:variable name="goods" as="xs:double*">
<xsl:apply-templates select="$stylesheet" mode="good"/>
</xsl:variable>
<xsl:assert test="every $w in $goods satisfies $w ge 0"
error-code="hoaxcoqs:E01">Weights must not be negative</xsl:assert>
<xsl:variable name="bads" as="xs:double*">
<xsl:apply-templates select="$stylesheet" mode="bad"/>
</xsl:variable>
<xsl:assert test="every $w in $bads satisfies $w ge 0"
error-code="hoaxcoqs:E01">Weights must not be negative</xsl:assert>
<xsl:sequence select="map {
'good': sum($goods),
'bad' : sum($bads)
}"/>
</xsl:function>
</xsl:stylesheet>