cloudtools/troposphere

Add ScheduleExpression validation

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#1,052 opened on May 24, 2018

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 (1 comment) (0 reactions) (0 assignees)Python (1,487 forks)batch import
enhancementhelp wanted

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Description

The field troposphere.events.Rule::ScheduleExpression is a basestring. The validity of it is confirmed during the stack creation of CloudWatch. The documentation for that field can be found here.

Would it be possible to validate the cron when JSON is being generated?

Contributor guide

Research direction
Look at the existing code for troposphere.events.Rule and understand how ScheduleExpression is currently handled. Then implement validation for cron expressions using a library like croniter or by parsing the cron syntax manually.
Tech stack
python
Domain
backendcloudinfrastructuredevops
Issue type
Feature
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
3
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
1-3 hours
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
Active
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
Clear
Prerequisites
PythonAWS CloudWatch cron syntax
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
75