hadolint/DL3021¶
COPY with more than 2 arguments requires the last argument to end with /.
| Property | Value |
|---|---|
| Severity | Error |
| Category | Correctness |
| Default | Enabled |
Description¶
If multiple source resources are specified in a COPY instruction, then the destination must be a directory and it must end with a slash /.
Omitting the trailing slash causes ambiguity and may lead to build errors or unexpected behavior.