Merge pull request #73 from CircleCI-Public/ONPREM-2694/portable-extract-images-from-helm-chart.sh

Make extract-images-from-helm-chart.sh more portable

Author: christian-stephen

air-gap/.gitignore

@@ -0,0 +1,2 @@
+images.txt
+

air-gap/extract-images-from-helm-chart.sh

@@ -1,19 +1,26 @@
 #!/bin/bash
 set -euo pipefail
 
-if ! command -v yq >/dev/null || ! yq --version | grep -q 'v4.' 2>&1; then
-  echo "Error: yq 4.x is required: https://mikefarah.gitbook.io/yq#install" >&2
-  yq --version
-  exit 1
-fi
-
-CHART_PATH="${1:-.}"
+CHART_PATH=$(realpath "${1:-.}")
 OUTPUT_FILE="${2:-images.txt}"
 
 TMP_VALUES=$(mktemp)
 TMP_IMAGES=$(mktemp)
 trap 'rm -f "$TMP_VALUES" "$TMP_IMAGES"' EXIT
 
+# Check if yq 4.x is available locally, otherwise use Docker
+if ! command -v yq >/dev/null || ! yq --version 2>&1 | grep -q 'v4\.'; then
+  echo "yq 4.x not found locally, using Docker image mikefarah/yq:4" >&2
+  yq() {
+    docker run --rm -i \
+      -u "$(id -u)" \
+      -v "${CHART_PATH}:${CHART_PATH}" \
+      -v "/tmp:/tmp" \
+      -w "${PWD}" \
+      mikefarah/yq:4 "$@"
+  }
+fi
+
 # Enable all components to ensure everything renders and we find all images
 yq '
   (.. | select(has("enabled")).enabled) = true