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Create Pipeline Rules syntax highlighting mode for Ace #5957

merged 20 commits into from Jun 21, 2019


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commented May 21, 2019


Created custom Mode for Ace Editor to introduce syntax highlighting for Pipeline Rules

Motivation and Context

  • User request
  • Improve code readability

How Has This Been Tested?

Screenshots (if appropriate):



Types of changes

  • Bug fix (non-breaking change which fixes an issue)
  • New feature (non-breaking change which adds functionality)
  • Breaking change (fix or feature that would cause existing functionality to change)


  • My code follows the code style of this project.
  • My change requires a change to the documentation.
  • I have updated the documentation accordingly.
  • I have read the CONTRIBUTING document.
  • I have added tests to cover my changes.
  • All new and existing tests passed.

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commented May 21, 2019

Errors currently in master

client.js:772 POST http://localhost:9000/api/system/pipelines/rule/parse 400 (Bad Request)

FetchProvider.js:19 There was an error fetching a resource: cannot POST http://localhost:9000/api/system/pipelines/rule/parse (400). Additional information: Not available

After adding in the syntax highlighting, an additional error is added to the mix, even though the mode actually loads fine and renders appropriately

index.js:3802 GET net::ERR_ABORTED 404 (Not Found)

I could use an additional set of eyes to help me figure out what's causing this 404 even though it actually works.

@kyleknighted kyleknighted force-pushed the ace_editor_pipeline_rules_mode branch 2 times, most recently from a83c08f to fd4ead0 Jun 11, 2019

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I have played with the PR today and it is a good improvement!

Some suggestions:

  • The mode should be named pipeline/pipeline_rule, not graylog to make it more specific.

  • The mode file can be reduced in size dramatically. While playing with it, I removed the JavaScript mode and let the graylog mode inherit from TextMode. Also, the folding is not required.

  • The mode contains a number of keywords (match|pipeline|all|either) which are not used in the rule language. I think you got them from the internal representation of pipelines, which is different from pipeline rules. While we might support editing them at some point, it would be a different mode than the pipeline rules.

  • rule|when|then|end should be keywords, not constants. This way the highlighting lets you differentiate visually between the outer framing of the rule and the used functions:
    Screen Shot 2019-06-19 at 14 02 53

  • Instead of maintaining a huge list of functions, we should try to fetch them again from the backend. (Maybe by using an instance of the mode again, which is passed to react-ace, so it is not evaluated in its scope, but ours)

  • If that is not possible, we should replace the static list with a regex. IMO it is confusing if a function that is in the list has a different color than a function that is supplied by a plugin (but is still correct). Validating that a function is defined is done by the editor anyway.

@kyleknighted kyleknighted force-pushed the ace_editor_pipeline_rules_mode branch 2 times, most recently from babb9b8 to 5e9b8f8 Jun 19, 2019

@kyleknighted kyleknighted force-pushed the ace_editor_pipeline_rules_mode branch from 5e9b8f8 to 4f67b2c Jun 20, 2019

@edmundoa edmundoa merged commit d5539f5 into master Jun 21, 2019

4 checks passed

ci-web-linter Jenkins build graylog-pr-linter-check 3742 has succeeded
continuous-integration/travis-ci/pr The Travis CI build passed
graylog-project/pr Jenkins build graylog-project-pr-snapshot 4308 has succeeded
license/cla Contributor License Agreement is signed.

@edmundoa edmundoa deleted the ace_editor_pipeline_rules_mode branch Jun 21, 2019

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