resolve-era.sh

#!/bin/bash

WANTED_ERA=$1
if [ $WANTED_ERA ]
then
    yq w -i ./values.yaml 'era' $WANTED_ERA
    ERA=$WANTED_ERA
fi

if [ ! $ERA ]
then
    ERA="`yq r ./values.yaml 'era'`"
fi

# Look for folders within ./yaml/, these should correspond to table names
find ./yaml/* -maxdepth 0 -type d -printf '%f\n' | while read dirName 
do
    # Zero out the list in the values.yaml to start:
    yq d -i ./values.yaml "${dirName}"

    # Iterate through yaml entries and pick ones that match our era:
    rm -rf /tmp/era-items && mkdir -p /tmp/era-items
    ITEM_INDEX=0

    find "./yaml/${dirName}" -type f -name '*.yaml' | while read file
    do
        DOC_COUNT=-1
        rm -rf /tmp/DOC_COUNT
        LOOP_INDEX=0

        yq -d'*' r "$file" 'eras' | while read erasArray
        do
            # strip the [ and ] from the line, turn commas into spaces, then read the eras line as a bash array:
            for item in $(echo "$erasArray" | awk '{print substr($0, 2, length($0) - 2)}' | sed 's/,/ /g')
            do
                if [ $item -eq $ERA ]
                then
                    echo $LOOP_INDEX > /tmp/DOC_COUNT
                    break
                fi
            done
            ((LOOP_INDEX=LOOP_INDEX+1))
        done

        if [ -f /tmp/DOC_COUNT ]
        then
            DOC_COUNT=`cat /tmp/DOC_COUNT`
        fi

        if [ $DOC_COUNT -eq -1 ]
        then
            echo "WARN: Failed to find matching era for file $file. Skipping."
        else
            echo "Processing era for file ${file}..."
            yq r -d${DOC_COUNT} "$file" > /tmp/era-items/${ITEM_INDEX}.yaml
            yq p -i /tmp/era-items/${ITEM_INDEX}.yaml "${dirName}[+]"
            ((ITEM_INDEX=ITEM_INDEX+1))
        fi
    done

    ITEMS_FILECOUNT=`ls -1q /tmp/era-items | wc -l`
    if [ $ITEMS_FILECOUNT -gt 0 ]
    then
        echo "Writing new values.yaml with era-resolved items for '$dirName'..."
        yq m -a /tmp/era-items/*.yaml > /tmp/era-items/merged.yaml
        yq m -a /tmp/era-items/merged.yaml ./values.yaml > ./values2.yaml
        mv ./values2.yaml ./values.yaml
    else
        echo "WARN: No files were output for '$dirName' because nothing matched era rules."
    fi
done

echo "Done."