[bitnami/*] Add ASCII validator (#26676)

* [bitnami/*] Add ASCII validator

Signed-off-by: Fran Mulero <fmulero@vmware.com>

* Remove preivous validation

Signed-off-by: Fran Mulero <fmulero@vmware.com>

* Fix grep expression

Signed-off-by: Fran Mulero <fmulero@vmware.com>

---------

Signed-off-by: Fran Mulero <fmulero@vmware.com>

.github/workflows/ci-pipeline.yml

@@ -195,12 +195,6 @@ jobs:
               echo "error=Please ensure all *.tag params are skipped (@skip) in the bitnami/${CHART}/values.yaml file"
               exit "$exit_code"
             fi
-            # Ensuring no unprintable characters are present in values.yaml
-            ! grep --quiet "[^[:print:]]" "bitnami/${CHART}/values.yaml" || exit_code=$?
-            if [[ $exit_code -ne 0 ]]; then
-              echo "error=Please ensure there are no unprintable characters in the bitnami/${CHART}/values.yaml file"
-              exit "$exit_code"
-            fi
             echo "Updating README.md for bitnami/${CHART}"
             readme-generator --values "bitnami/${CHART}/values.yaml" --readme "bitnami/${CHART}/README.md" --schema "/tmp/schema.json"
             # Commit all changes, if any

.github/workflows/values-ascii-check.yml

@@ -0,0 +1,48 @@
+# Copyright Broadcom, Inc. All Rights Reserved.
+# SPDX-License-Identifier: APACHE-2.0
+
+name: '[CI/CD] Values ASCII validator'
+on:
+  pull_request:
+    branches:
+      - main
+    paths:
+      - '**/values.yaml'
+# Remove all permissions by default
+permissions: {}
+jobs:
+  values-ascii:
+    runs-on: ubuntu-latest
+    permissions:
+      contents: read
+    steps:
+      - name: Checkout project
+        uses: actions/checkout@a5ac7e51b41094c92402da3b24376905380afc29
+      - name: Values ASCII validator
+        env:
+          DIFF_URL: "${{github.event.pull_request.diff_url}}"
+          TEMP_FILE: "${{runner.temp}}/pr-${{github.event.number}}.diff"
+          TEMP_OUTPUT: "${{runner.temp}}/output"
+        run: |
+          # This request doesn't consume API calls.
+          curl -Lkso $TEMP_FILE $DIFF_URL
+          files_changed="$(sed -nr 's/[\-\+]{3} [ab]\/(.*)/\1/p' $TEMP_FILE | sort | uniq)"
+          values_files="$(echo "$files_changed" | grep -o ".*values\.yaml$" | sort | uniq || true)"
+          # Create an empty file, useful when the PR changes ignored files
+          touch "${TEMP_OUTPUT}"
+          grep -nHP "[\x80-\xFF]" "${values_files[@]}" | sort -u > ${TEMP_OUTPUT} || true
+          while read -r line; do
+            # line format:
+            #   file:row:message
+            # Split by ':'
+            readarray -d : -t strarr < <(printf '%s' "$line")
+            if [[ "${#strarr[@]}" -ge 3 ]]; then
+              echo "::warning file=${strarr[0]},line=${strarr[1]}:: Non ASCII character in '${strarr[@]:2}'"
+            else
+              echo "::warning:: Error processing: ${line}"
+            fi
+          done < "${TEMP_OUTPUT}"
+          if [[ -s ${TEMP_OUTPUT} ]]; then
+            echo "::error:: Please review warning messages"
+            exit 1
+          fi