Use jq builtin instead https://github.com/stedolan/jq/blob/master/src/builtin.jq\#L45

meeDamian · meeDamian · commit 3edfcd95c5d5 · 2020-07-04T16:37:34.000+08:00
diff --git a/entrypoint.sh b/entrypoint.sh
@@ -69,7 +69,7 @@ gh_release_api() {
 ## Check for Github Release existence
 #
 # docs ref: https://developer.github.com/v3/repos/releases/#get-a-release-by-tag-name
-release_id="$(gh_release_api "tags/$tag" | jq -r '.id | select(. != null)')"
+release_id="$(gh_release_api "tags/$tag" | jq -r '.id | values')"
 
 if [ -n "$release_id" ] && [ "$INPUT_ALLOW_OVERRIDE" != "true" ]; then
 	>&2 echo "::error::missing: allow_override (see log for details)"

Original file line number	Diff line number	Diff line change
`@@ -69,7 +69,7 @@ gh_release_api() {`
`69`	`69`	`## Check for Github Release existence`
`70`	`70`	`#`
`71`	`71`	`# docs ref: https://developer.github.com/v3/repos/releases/#get-a-release-by-tag-name`
`72`		`-release_id="$(gh_release_api "tags/$tag" \| jq -r '.id \| select(. != null)')"`
	`72`	`+release_id="$(gh_release_api "tags/$tag" \| jq -r '.id \| values')"`
`73`	`73`
`74`	`74`	`if [ -n "$release_id" ] && [ "$INPUT_ALLOW_OVERRIDE" != "true" ]; then`
`75`	`75`	`>&2 echo "::error::missing: allow_override (see log for details)"`