Move yq helpers to its own file

_yq.sh

@@ -0,0 +1,21 @@
+#!/usr/bin/env bash
+
+_yq() {
+  local yq
+  yq=$(which yq || true)
+  if [ -z "$yq" ]; then
+    yq=/usr/bin/yq
+    _copy_yq_from_docker_image "$yq" > /dev/null
+  fi
+  "$yq" "$@"
+}
+
+_copy_yq_from_docker_image() {
+  local yq_path=$1
+  : "${yq_path:?I need a path where yq will be copied}"
+  local hash
+  docker pull whoan/yq:4.35.2 >&2
+  hash=$(docker create whoan/yq:4.35.2)
+  docker cp "$hash":/usr/bin/yq "$yq_path"
+  docker rm "$hash"
+}

entrypoint.sh

@@ -12,6 +12,8 @@ if [ -z "$INPUT_COMPOSE_FILE" ]; then
   exit
 fi
 
+source ./_yq.sh
+
 merged_compose=/tmp/merged-compose.yml
 original_INPUT_IMAGE_TAG=$INPUT_IMAGE_TAG
 original_INPUT_CONTEXT=$INPUT_CONTEXT
@@ -34,26 +36,6 @@ build_from_compose_file() {
   done
 }
 
-_yq() {
-  local yq
-  yq=$(which yq || true)
-  if [ -z "$yq" ]; then
-    yq=/usr/bin/yq
-    _copy_yq_from_docker_image "$yq" > /dev/null
-  fi
-  "$yq" "$@"
-}
-
-_copy_yq_from_docker_image() {
-  local yq_path=$1
-  : "${yq_path:?I need a path where yq will be copied}"
-  local hash
-  docker pull whoan/yq:4.35.2 >&2
-  hash=$(docker create whoan/yq:4.35.2)
-  docker cp "$hash":/usr/bin/yq "$yq_path"
-  docker rm "$hash"
-}
-
 _merge_yamls() (
   local yamls=()
   mapfile -d ">" -t yamls < <(echo -n "$INPUT_COMPOSE_FILE")