v3.3.0 fails in our build pipeline with an "TypeError: data.forEach is not a function" error

[edgarvonk]

Not sure if this is an issue in the json-yaml-validate GitHub action or in our configuration or code base but upgrading to v3.3.0 fails with the following error:

Run GrantBirki/json-yaml-validate@947ae8ac60c83cf78e4e00b3170ff8bee61f5248
  with:
    comment: true
    allow_multiple_documents: true
    yaml_exclude_regex: charts/.+\.ya?ml$
    github_token: ***
    mode: fail
    base_dir: .
    use_dot_match: true
    json_schema_version: draft-07
    json_extension: .json
    use_ajv_formats: true
    yaml_extension: .yaml
    yaml_extension_short: .yml
    yaml_as_json: false
    exclude_file_required: true
    use_gitignore: true
    git_ignore_path: .gitignore
    ajv_strict_mode: true

/home/runner/work/_actions/GrantBirki/json-yaml-validate/947ae8ac60c83cf78e4e00b3170ff8bee61f5[2](https://github.com/infonl/dimpact-zaakafhandelcomponent/actions/runs/14476888345/job/40604567149?pr=3106#step:3:2)48/src/functions/json-validator.js:260
    data.forEach((doc, index) => {
^
TypeError: data.forEach is not a function
    at jsonValidator (/home/runner/work/_actions/GrantBirki/json-yaml-validate/947ae8ac60c8[3](https://github.com/infonl/dimpact-zaakafhandelcomponent/actions/runs/14476888345/job/40604567149?pr=3106#step:3:3)cf78e4e00b3170ff8bee61f52[4](https://github.com/infonl/dimpact-zaakafhandelcomponent/actions/runs/14476888345/job/40604567149?pr=3106#step:3:4)8/src/functions/json-validator.js:260:1)
    at run (/home/runner/work/_actions/GrantBirki/json-yaml-validate/947ae8ac60c83cf78e4e00b3170ff8bee61f[5](https://github.com/infonl/dimpact-zaakafhandelcomponent/actions/runs/14476888345/job/40604567149?pr=3106#step:3:5)248/src/main.js:7:1)

For details see: https://github.com/infonl/dimpact-zaakafhandelcomponent/actions/runs/14488643815/job/40639743793?pr=3106

Our GitHub workflow in question:

# SPDX-FileCopyrightText: 2025 Lifely
# SPDX-License-Identifier: EUPL-1.2+

name: Validate json and yaml files in the repo
on:
  push:
    branches:
      - main
  pull_request:
  merge_group:
  workflow_dispatch:

permissions:
  contents: read
  pull-requests: write # enable write permissions for pull request comments

jobs:
  json-yaml-validate:
    runs-on: ubuntu-24.04
    steps:
      - name: Checkout repository
        uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2

      - name: json-yaml-validate
        id: json-yaml-validate
        uses: GrantBirki/json-yaml-validate@e42e6ece9b97f2b220274c909a9a98e380c2c9fd # v3.2.1
        with:
          comment: true
          allow_multiple_documents: true
          yaml_exclude_regex: "charts/.+\\.ya?ml$" # validation will break on helm charts. We have linting already in place

[mloiseleur]

Same on external-dns.
It can be seen in this PR and, for instance, this run.

The config we have is:

      - name: json-yaml-validate
        uses: GrantBirki/json-yaml-validate@v3.3.0 
        with:
          # ref: https://github.com/GrantBirki/json-yaml-validate?tab=readme-ov-file#inputs-
          comment: "true" # enable comment mode
          yaml_exclude_regex: "(charts/external-dns/templates.*|mkdocs.yml)"
          allow_multiple_documents: "true"

[GrantBirki]

Logs for posterity:

Run GrantBirki/json-yaml-validate@v3.3.0
  with:
    comment: true
    yaml_exclude_regex: (charts/external-dns/templates.*|mkdocs.yml)
    allow_multiple_documents: true
    github_token: ***
    mode: fail
    base_dir: .
    use_dot_match: true
    json_schema_version: draft-07
    json_extension: .json
    use_ajv_formats: true
    yaml_extension: .yaml
    yaml_extension_short: .yml
    yaml_as_json: false
    exclude_file_required: true
    use_gitignore: true
    git_ignore_path: .gitignore
    ajv_strict_mode: true

/home/runner/work/_actions/GrantBirki/json-yaml-validate/v3.3.0/src/functions/json-validator.js:[2](https://github.com/kubernetes-sigs/external-dns/actions/runs/15290544801/job/43009045261?pr=5429#step:3:2)60
    data.forEach((doc, index) => {
^
TypeError: data.forEach is not a function
    at jsonValidator (/home/runner/work/_actions/GrantBirki/json-yaml-validate/v[3](https://github.com/kubernetes-sigs/external-dns/actions/runs/15290544801/job/43009045261?pr=5429#step:3:3).3.0/src/functions/json-validator.js:260:1)
    at run (/home/runner/work/_actions/GrantBirki/json-yaml-validate/v3.3.0/src/main.js:[7](https://github.com/kubernetes-sigs/external-dns/actions/runs/15290544801/job/43009045261?pr=5429#step:3:7):1)

[GrantBirki]

With debug logs:

##[debug]Evaluating condition for step: 'acceptance test - excluding helm charts'
##[debug]Evaluating: success()
##[debug]Evaluating success:
##[debug]=> true
##[debug]Result: true
##[debug]Starting: acceptance test - excluding helm charts
##[debug]Loading inputs
##[debug]Evaluating: github.token
##[debug]Evaluating Index:
##[debug]..Evaluating github:
##[debug]..=> Object
##[debug]..Evaluating String:
##[debug]..=> 'token'
##[debug]=> '***'
##[debug]Result: '***'
##[debug]Loading env
Run ./
##[debug]exclude_file was not provided - OK
##[debug]use_gitignore: true
##[debug]loading .gitignore file from path: .gitignore
##[debug]yaml_as_json: false
##[debug]json_schema_version: draft-07
##[debug]strict: true
##[debug]using ajv-formats with json-validator
##[debug]json - using baseDir: __tests__/acceptance
##[debug]json - using glob: **/*.json
##[debug]using baseDir: __tests__/acceptance
##[debug]using glob: **/*.json
##[debug]found file: __tests__/acceptance/dev/test[2](https://github.com/GrantBirki/json-yaml-validate/actions/runs/15316200806/job/43090465844#step:10:2).json

/home/runner/work/json-yaml-validate/json-yaml-validate/src/functions/json-validator.js:260
    data.forEach((doc, index) => {
^
TypeError: data.forEach is not a function
    at jsonValidator (/home/runner/work/json-yaml-validate/json-yaml-validate/src/functions/json-validator.js:2[6](https://github.com/GrantBirki/json-yaml-validate/actions/runs/15316200806/job/43090465844#step:10:6)0:1)
    at run (/home/runner/work/json-yaml-validate/json-yaml-validate/src/main.js:[7](https://github.com/GrantBirki/json-yaml-validate/actions/runs/15316200806/job/43090465844#step:10:7):1)
##[debug]Node Action run completed with exit code 1
##[debug]Finishing: acceptance test - excluding helm charts

[GrantBirki]

@mloiseleur + @edgarvonk this should now be fixed in v3.3.1. Thank you for bringing it to my attention! 🙇