feature: versioned interrupt signal

[grkek]

No description provided.

[grkek]

@yanecc What do you think of this feature, I think it is enough to have a versioned interrupt handler?

[yanecc]

Process.on_interrupt is available since crystal 1.8.0.

[yanecc]

Crystal::VERSION.split(".").map(&.to_i) will cause unhandled exception when building with crystal versions under development such as 1.13.0-dev and you may like:

{% if compare_versions(Crystal::VERSION, "1.12.0") >= 0 %}
  ...
{% elsif compare_versions(Crystal::VERSION, "1.8.0") < 0 %}
  ...
{% else %}
  ...
{% end %}

[grkek]

Crystal::VERSION.split(".").map(&.to_i) will cause unhandled exception when building with crystal versions under development such as 1.13.0-dev and you may like:

{% if compare_versions(Crystal::VERSION, "1.12.0") >= 0 %}
  ...
{% elsif compare_versions(Crystal::VERSION, "1.8.0") < 0 %}
  ...
{% else %}
  ...
{% end %}

You are right, I will add a check to remove such cases from the starting string.

[yanecc]

Process.on_interrupt is available since crystal 1.8.0.

@grkek