Optional parameters are still not working

[oscerd]

Suppose you have:

apiVersion: camel.apache.org/v1alpha1
kind: Kamelet
metadata:
  name: aws-s3-sink
  annotations:
    camel.apache.org/kamelet.support.level: "Preview"
    camel.apache.org/catalog.version: "main-SNAPSHOT"
    camel.apache.org/kamelet.icon: "data:image/svg+xml;base64,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"
    camel.apache.org/provider: "Apache Software Foundation"
    camel.apache.org/kamelet.group: "AWS S3"
  labels:
    camel.apache.org/kamelet.type: "sink"
spec:
  definition:
    title: "AWS S3 Sink"
    description: |-
      Upload data to AWS S3.

      The Kamelet expects the following headers to be set:

      - `file` / `ce-file`: as the file name to upload

      If the header won't be set the exchange ID will be used as file name.
    required:
      - bucketNameOrArn
      - accessKey
      - secretKey
      - region
    type: object
    properties:
      bucketNameOrArn:
        title: Bucket Name
        description: The S3 Bucket name or ARN.
        type: string
      accessKey:
        title: Access Key
        description: The access key obtained from AWS.
        type: string
        format: password
        x-descriptors:
        - urn:alm:descriptor:com.tectonic.ui:password
      secretKey:
        title: Secret Key
        description: The secret key obtained from AWS.
        type: string
        format: password
        x-descriptors:
        - urn:alm:descriptor:com.tectonic.ui:password
      region:
        title: AWS Region
        description: The AWS region to connect to.
        type: string
        example: eu-west-1
      overrideEndpoint:
        title: Override Endpoint
        description: Set the need for overidding the endpoint. This option needs to be used in combination with uriEndpointOverride.
        type: boolean
        default: false
        x-descriptors:
        - 'urn:alm:descriptor:com.tectonic.ui:checkbox'
      uriEndpointOverride:
        title: Override Endpoint URI
        description: Set the overriding uri endpoint. This option needs to be used in combination with overrideEndpoint option.
        type: string
        example: "http://another-s3-endpoint:9000"
      autoCreateBucket:
        title: Autocreate Bucket
        description: Setting the autocreation of the S3 bucket bucketName.
        type: boolean
        x-descriptors:
        - 'urn:alm:descriptor:com.tectonic.ui:checkbox'
        default: false
  dependencies:
    - "camel:aws2-s3"
    - "camel:kamelet"
  flow:
    from:
      uri: "kamelet:source"
      steps:
      - choice:
          when:
          - simple: "${header[file]}"
            steps:
            - set-header:
                name: CamelAwsS3Key
                simple: "${header[file]}"
          - simple: "${header[ce-file]}"
            steps:
            - set-header:
                name: CamelAwsS3Key
                simple: "${header[ce-file]}"
          otherwise:
            steps:
            - set-header:
                name: CamelAwsS3Key
                simple: "${exchangeId}"
      - to:
          uri: "aws2-s3:{{bucketNameOrArn}}"
          parameters:
            secretKey: "{{secretKey}}"
            accessKey: "{{accessKey}}"
            region: "{{region}}"
            uriEndpointOverride: "{{?uriEndpointOverride}}"
            overrideEndpoint: "{{overrideEndpoint}}"
            autoCreateBucket: "{{autoCreateBucket}}"

The uriEndpointOverride is optional and is not required.

By using this kamelet in a binding, you'll get the following error:

[1] 2021-06-04 12:38:23,401 ERROR [io.qua.run.Application] (main) Failed to start application (with profile prod): java.lang.IllegalArgumentException: Route template aws-s3-sink the following mandatory parameters must be provided: uriEndpointOverride

[oscerd]

This is fixed on 1.8.0 and 1.9.0