update.sh

#!/bin/bash

#Exit immediately if a pipeline returns a non-zero status - https://www.gnu.org/software/bash/manual/html_node/The-Set-Builtin.html
set -e

USER=sfkpmr
TOKEN=$(</home/marcus/.github_token)
MYPATH=$(dirname "$0")
SOFTWAREJSON=$MYPATH/json/software.json
TEMPFILE=$MYPATH/json/tempjson.json
RELEASESLIST=$MYPATH/csv/releases.csv
TAGSLIST=$MYPATH/csv/tags.csv
TODAY=$(TZ=Europe/Stockholm date +'%y-%m-%d')
LOGDIRECTORY=$MYPATH/logs
LOGNAME=$LOGDIRECTORY/$(TZ=Europe/Stockholm date +'%Y-%m').log

writeLog() {

        DATE=$(TZ=Europe/Stockholm date +'%y/%m/%d %T')
        echo "$DATE | ${1} | New release: ${2} Old: ${3} | ${4}" >> $LOGNAME
}

versionCheck() {

        #https://stackoverflow.com/questions/48491662/comparing-two-version-numbers-in-a-shell-script
        printf -v versions '%s\n%s' "${2}" "${1}"
        if [[ $versions = "$(sort -V <<< "$versions")" ]]; then
                echo -1
        else  
                echo 1
        fi
}

versionFilter() {

        #Filter out unstable releases
        #-z returns true if the string is null
        if [[ -z $(echo ${1} | grep -i -E 'alpha|rc|dev|candidate|beta') ]]; then
                echo $(echo ${1} | grep -P -i -o '([0-9]+(\.[0-9]+)+)')
        else
                echo -1
        fi
}

checkReleases() {
        while IFS=, read -r REPO NAME
        do
                REPODATA=$(curl -u ${USER}:${TOKEN} -H "Accept: application/vnd.github.v3+json" https://api.github.com/repos/${REPO}/releases/latest)

                if [[ $( echo $REPODATA | jq -r .message ) == "Not Found" ]]; then
                        writeLog "${NAME}" "-" "-" "curl error!" 
                else
                        #REGEX generator https://regex-generator.olafneumann.org/
                        RELEASEVERSION=$(echo "$REPODATA" | jq -r .tag_name ) 
                        RELEASEDATE=$(echo "$REPODATA" | jq -r .published_at | grep -P -i -o '[0-9]{4}-[0-9]{2}-[0-9]{2}')
                        RELEASEURL=$(echo $REPODATA | jq -r .html_url)

                        updateList "${NAME}" ${RELEASEVERSION} ${RELEASEDATE:2} ${RELEASEURL} #Trimming two first characters
                fi
        done < ${RELEASESLIST}
}

checkTags() {
        while IFS=, read -r REPO NAME
        do
                REPODATA=$(curl -u ${USER}:${TOKEN} -H "Accept: application/vnd.github.v3+json" https://api.github.com/repos/${REPO}/tags?per_page=100) 

                if [[ $( echo $REPODATA | grep 'Not Found' ) ]]; then
                        writeLog "${NAME}" "-" "-" "curl error!"
                else
                        TAGNAME=$(echo $REPODATA | jq -r '.[0].name' )
                        #Use &&s?
                        updateList "$NAME" "${TAGNAME}" "$TODAY" "https://github.com/$REPO/releases/tag/$TAGNAME"
                fi
        done < ${TAGSLIST}
}

updateList() {

        VERSION=$(versionFilter ${2})
        
        if [[ "$VERSION" != -1 ]] ; then

                CURRENTVERSION=$(jq -r --arg name "${1}" '.[] | select(.name == $name).release_version' $SOFTWAREJSON)

                if [[ $(versionCheck $CURRENTVERSION $VERSION) -eq 1 ]]; then
                        cat $SOFTWAREJSON |
                        jq --arg name "${1}" --arg version "$VERSION" --arg releaseDate "${3}" --arg releaseURL "${4}" 'map(if .name == $name
                        then . + {"release_date": $releaseDate, "release_version": $version, "release_url": $releaseURL}
                        else .
                        end
                        )' > $TEMPFILE && mv $TEMPFILE $SOFTWAREJSON && writeLog "${1}" "$VERSION" "$CURRENTVERSION" "Updated!" 
                else
                        writeLog "${1}" "${2}" "$CURRENTVERSION" "Not an update!" 
                fi
        else
                writeLog "${1}" "${2}" "$CURRENTVERSION" "Unstable release!" 
        fi
}

if [ ! -f "$SOFTWAREJSON" ]; then
        writeLog ERROR ERROR ERROR "Software list missing!" 
        exit 1
fi

if [[ ! -d "$LOGDIRECTORY" ]]; then
        mkdir $LOGDIRECTORY
fi

touch $LOGNAME

checkReleases
checkTags