Add boolean negation and ternary operator to interpolation function

Component input interpolation is too limited.
Common patterns require job duplication or complex rules.

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Proposal

1. Boolean inversion

Adding boolean negation could be implemented as:

• ! inputs.strict
• or not inputs.strict

Example:

test:job:
  allow_failure: $[[ ! inputs.strict ]]

2. Ternary operator

Allow conditional expressions in interpolation, current workaround (duplicated jobs):

test:job:cache:
  rules:
    - if: '"$[[ inputs.cache_url ]]" != ""'
  script:
    - my_cmd --cache-url $[[ inputs.cache_url ]]

test:job:no-cache:
  rules:
    - if: '"$[[ inputs.cache_url ]]" == ""'
  script:
    - my_cmd

Proposed:

test:job:$[[ inputs.cache_url != "" ? "cache" : "no-cache" ]]
  script:
    - my_cmd $[[ inputs.cache_url != "" ? "--cache-url " + inputs.cache_url : "" ]]

Note

The ternary example uses string concatenation ("--cache-url " + inputs.cache_url) to illustrate a possible use case. Support for string operations (such as concatenation) could be addressed separately. This proposal focuses on conditional selection, not on defining a full expression or string-manipulation language.

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Benefits

• Fewer duplicated jobs.
• Cleaner components.
• Easier maintenance.