JSON message format invalid

[thopaw]

When I want to use this plugin I get the following error during the execution of the plugin with debug flag:

[17:28:51] [semantic-release] › ✔  Completed step "publish" of plugin "@semantic-release/gitlab"
[17:28:51] [semantic-release] › ℹ  Start step "success" of plugin "semantic-release-slack-bot"
[17:28:51] [semantic-release] [semantic-release-slack-bot] › ℹ  Sending slack notification on success
[17:28:52] [semantic-release] [semantic-release-slack-bot] › ℹ  JSON message format invalid
[17:28:52] [semantic-release] › ✖  Failed step "success" of plugin "semantic-release-slack-bot"
[17:28:52] [semantic-release] › ℹ  Start step "fail" of plugin "semantic-release-slack-bot"
[17:28:52] [semantic-release] [semantic-release-slack-bot] › ℹ  Sending slack notification on fail
[17:28:52] [semantic-release] › ✔  Completed step "fail" of plugin "semantic-release-slack-bot"
[17:28:52] [semantic-release] › ✖  SLACK CONNECTION FAILED:  
{ AggregateError: 
    SemanticReleaseError
        at fetch.then.then.catch.e (/home/thopaw/git/freeyou/api-paymentmethod/node_modules/semantic-release-slack-bot/lib/postMessage.js:25:10)
        at <anonymous>
    at /home/thopaw/git/freeyou/api-paymentmethod/node_modules/semantic-release/lib/plugins/pipeline.js:54:11
    at <anonymous>
    at process._tickCallback (internal/process/next_tick.js:188:7) name: 'AggregateError' }

Also the emssage of the failure in slack does not contain the name of the project:

An error occurred while trying to publish the new version of undefined!

On a different project with exactly the same config it is working.
Can it be a problem of the length of the slack message?
This is the first run of semantic release and the release-notes are longer then the release-notes on the other project.

The project contains a releaserc.yml.

branch: master
plugins:
  - '@semantic-release/commit-analyzer'
  - '@semantic-release/release-notes-generator'
  - '@semantic-release/gitlab'
  - - semantic-release-slack-bot
    - notifyOnSuccess: true
      notifyOnFail: true

and these versions are defined within the package.json:

"devDependencies": {
    "@semantic-release/changelog": "^3.0.4",
    "@semantic-release/gitlab": "^3.1.5",
    "semantic-release": "^15.13.16",
    "semantic-release-slack-bot": "^1.0.4",
....

[hannesrabo]

Regarding the error with missing project name: the plugin reads this field from the npm package name defined in the current context. Maybe your project does not define such a name?

[hannesrabo]

After looking into this I realized that if you run semantic release outside of npm (such as a global package instead of as npm run <run script for semantic-release> it will create the undefined package name. I added checking for this and the option of defining a custom package name in the environment (see documentation).

[hannesrabo]

I can't reproduce/understand your problem regarding development. Maybe this is also relate. When running in a debugging environment I launch semantic release like this.

SLACK_WEBHOOK="<my hook>" npm run semantic-release where semantic-release is a npm script that runs semantic-release --no-ci

Please elaborate if this is still a problem.

[thopaw]

yes you are right. I run it with
GL_TOKEN=test SLACK_WEBHOOK=http://test npx semantic-release
The same behaviour is within
npm run release

I tried to build a example to reproduce the error but with the very same config and version it is working.
The only difference is the amount of the release notes :-(

[thopaw]

It definitely has something to do with the release notes posted in the slack message.
When I commented the plugin @semantic-release/release-notes-generator out, the slack notifier is working.

Perhaps you can reproduce it with a git repo with many commits (in my case ~50) in the release notes.

[thopaw]

I now can reproduce it.

The following config for semantic release is used:

With the command I generate 50 commits
for i in $(seq 1 50); do touch "test-$i" && git add "test-$i" && git commit -m "feat: added file test$i"; done

When I then start semantic release
SLACK_WEBHOOK=... npm run release -- --no-ci
the error occurs.

I check the docs and it says that within a block the text property must have a length < 3000.

I created a pull request and would be glad, if you accept it and merge it into master.
#5