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A comment on Using ARG in a Dockerfile – beware the gotcha. Parent comment

Re:Using ARG in a Dockerfile – beware the gotcha by johanbcn on Tuesday May 14, 2024 @04:49AM (#40352973)
It's explained on the official documentation: https://docs.docker.com/reference/dockerfile/#scope
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Re:Using ARG in a Dockerfile – beware the gotcha by hombre_fatal on Tuesday May 14, 2024 @05:03AM (#40353077)
True, though gotchas exist when user intuition doesn't match with actual behavior regardless of whether they are mentioned in docs.
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Re:Using ARG in a Dockerfile – beware the gotcha by chii on Tuesday May 14, 2024 @05:52AM (#40353379)
Principle of least surprise.

If you need to write in the docs about a surprise that a user otherwise wouldn't have expected, may be it's a sign that the surprise should be fixed up such that it's not surprising behaviour.

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