Failed to parse PAYLOAD_FILE payload.json: invalid JSON provided

[Edgar Khimich]

Hello guys 
Trying to integrate slack messages in my pipeline but receiving an "Invalid JSON provided" error. 

This is my pipeline: 

pipelines:
  default:
    - step:
        name: Slack Notification
        script:
          - apt-get update && apt-get install gettext-base
          - envsubst < ./pipeline/slack/payloads/payload_firebase_beta.json.template > ./pipeline/slack/payloads/payload_firebase_beta.json
          - pipe: atlassian/slack-notify:2.0.0
            variables:
              WEBHOOK_URL: $WEBHOOK_URL
              PRETEXT: 'New Android beta release was published to Firebase! 🚀🚀🚀'
              PAYLOAD_FILE: ./pipeline/slack/payloads/payload_firebase_beta.json

payload_firebase_beta.json

{
  "blocks": [
      {
          "type": "section",
          "text": {
              "type": "mrkdwn",
              "text": "$WEBSITE"
          }
      },
      {
          "type": "divider"
      },
      {
          "type": "section",
          "text": {
              "type": "mrkdwn",
              "text": "Test mrkdwn text"
          }
      }
  ]
}

payload_firebase_beta.json.template 

WEBSITE="test website"

 Error:

INFO: Starting with payload provided in PAYLOAD_FILE...
INFO: Sending notification to Slack...
✖ Failed to parse PAYLOAD_FILE payload.json: invalid JSON provided.

Thank you in advance 

[Mark C]

Hi @Edgar Khimich

Thank you for reaching out to the community.

I've tested the same on my end.
However, using the JSON format you provided works fine on my end.
I tried providing an invalid JSON format to the Pipes script and I was able to reproduce the same error message.

For this, would it be possible for you to check the JSON format after the command envsubst?

- envsubst < ./pipeline/slack/payloads/payload_firebase_beta.json.template > ./pipeline/slack/payloads/payload_firebase_beta.json
- cat ./pipeline/slack/payloads/payload_firebase_beta.json

Let me know how it goes.

Regards,
Mark C

[Edgar Khimich]

Sorry for a bit late response. 
It overwrites the payload_firebase_beta.json file with this text.

WEBSITE="test website"

It replaced the whole file instead of the specific veriable.
That's why it says that the JSON is invalid

Which envsubst command are you using that works from your side?
Should my file with variables (template) be in a template format or txt?
 

[Edgar Khimich]

Okay
I found the reason why it didn't work.
I should have first export them as ENVIRONMENT VARS and only after that use it with envsubst.

- export RELEASE_DATE=$(date +'%b %d, %Y')
- envsubst < ./pipeline/slack/payloads/payload_firebase_beta.json.template > ./pipeline/slack/payloads/payload_firebase_beta.json

Now it works!

[Mark C]

Hi @Edgar Khimich

Glad to know you've found the reason why it didn't work.

Thank you also for sharing your solution.

Let me know if you have further questions.

Regards,
Mark C