pdk validate does not flag metadata files with invalid JSON escape sequence

[timidri]

Describe the bug
When a task metadata json file contains an invalid escape sequence, JSON linters (such as jq and Puppet Forge) raise an error but pdk validate does not flag that issue.

To Reproduce
Consider this task metadata test.json:

{
  "puppet_task_version": 1,
  "supports_noop": false,
  "description": "A description with an invalid \( escape sequence",
  "parameters": {
  }
}

pdk validate task passes normally but jq flags a problem:

cat test.json | jq
parse error: Invalid escape at line 4, column 67

Expected behavior
pdk validate raises the same error as jq.

Additional context

• Installation method: native packages
• PDK version 2.1
• OS: MacOS Catalina / Ubuntu 18.04

[sanfrancrisko]

Still an issue in PDK 2.1

[sanfrancrisko]

Hi @timidri - the underlying gem where this would need to be fixed is metadata-json-lint. Would you be able to raise an issue with them to address?

[timidri]

@sanfrancrisko Raised issue voxpupuli/metadata-json-lint#119