Rosetta Code/Find unimplemented tasks: Difference between revisions

=={{header|hq}}==

This script illustrates how jq interoperates with other command-line tools. It was tested in October, 2022

using both the C and Go implementations of jq.

The only pre-requisites other than bash are curl and jq, which is called at least four times.

<syntaxhighlight lang="bash">

#!/bin/bash

# October 8, 2022

# https://rosettacode.org/w/index.php?title=Rosetta_Code/Find_unimplemented_tasks

# Syntax: $0 [--markdown] CATEGORY

# Fetch the Category:Programming_Tasks and Category:$category pages,

# then compute the differences in the lists of titles.

# If --markdown is specified, then some markdown suitable for RosettaCode.org is added.

BN=$(basename "$0")

JQ=jq

function die { echo "$BN: $@" >&2 ; exit 1 ; }

baseuri="https://rosettacode.org/w/api.php?action=query&list=categorymembers&cmtitle=Category:"

if [ "$1" = "--markdown" ] ; then

markdown="--argjson markdown true"

shift

else

markdown="--arg markdown false"

fi

category="$1"

test -z "$category" && die "Syntax: $0 [--markdown] CATEGORY"

for id in $category Programming_Tasks; do

id=/tmp/rosettacode.$id.titles.json

test -s "$id" && rm "$id"

done

function getall {

local cat="$1"

local cmcontinue="$2"

local tmpfile="/tmp/rosettacode.$cat.json.tmp"

local continue=true

# cmlimit=500 is the max allowed so use paging

curl -Ss "${baseuri}${cat}&format=json&cmlimit=500${cmcontinue}" > "$tmpfile"

if [ ! -s "$tmpfile" ] ; then return ; fi

$JQ '.query.categorymembers[].title' "$tmpfile" >> /tmp/rosettacode.$cat.titles.json

cmcontinue=$($JQ -r '.continue | if . then .cmcontinue else null end' "$tmpfile" )

if [ -z "$cmcontinue" -o "$cmcontinue" = "null" ] ; then return ; fi

echo $BN: fetching continuation page for $cat ...

getall "$cat" "&cmcontinue=$cmcontinue"

}

getall $category

getall Programming_Tasks

for id in $category Programming_Tasks; do

id=/tmp/rosettacode.$id.titles.json

test -s "$id" || die "unable to find $id"

done

$JQ -r -n $markdown --slurpfile tasks /tmp/rosettacode.Programming_Tasks.titles.json \

--slurpfile cat /tmp/rosettacode.$category.titles.json '

def mark: if $markdown then "* [[\(gsub(" ";"_"))|\(.)]]" else . end;

($tasks - $cat)[] | mark '

</syntaxhighlight>