Merge a list of keys into a JSON map and clean up old entries

.editorconfig

[*.bash]
indent_style = tab
indent_size = 2

[*.{txt,json}]
indent_style = space
indent_size = 2

manifest.json

{
  "test-app1--main": [
    "v2-i50-builder",
    "v1-i50-builder",
    "v1-i51-builder"
  ],
  "test-app2--main": [
    "v1-i51-builder"
  ],
  "someapp--master": [
    "v1-i50-builder"
  ],
  "another--one": [
    "v2-i50-builder"
  ]
}

runner.bash

#!/usr/bin/env bash
tail -n1000 *.json *.txt

jq \
	--slurpfile manifest ./manifest.json \
	--rawfile updates ./updates.txt \
	--null-input \
	--arg builder "v1-i51-builder" \
	--from-file <(cat <<- DOC
	# remove any entries that match $builder
	(\$manifest[] | map_values(del(.. | select(. == \$builder)))) as \$current
	# read the raw file lines into an array and strip empty lines
	| (\$updates | split("\n") | map(select(.|length > 0))
	# create a updates object using the current repo-branches and remaining items
	| reduce .[] as \$item ({}; {(\$item): (\$current[\$item] + [\$builder])} + .)) as \$override
	# do an object assign
	| \$current + \$override
	# remove empty entries
	| del(.[] | select(. | length == 0))
	DOC
)

updates.txt

test-app1--main
another--one