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Created SC1144 (markdown)

Vidar Holen
2022-10-19 21:17:07 -07:00
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## external-sources can only be enabled in .shellcheckrc, not in individual files.
### Problematic code:
```sh
# shellcheck external-sources=true
source /dev/zero
```
### Correct code:
Add `external-sources=true` to `.shellcheckrc`
### Rationale:
Due to its origins as an online tool, ShellCheck will by default run in a sandbox where it only reads the files explicitly named on the command line.
The `external-sources` [[directive]] allows disabling this, but must be specified in `.shellcheckrc`. This is because the sandbox would be useless if the sandboxed script can disable it for itself.
### Exceptions:
None.
### Related resources:
* Help by adding links to BashFAQ, StackOverflow, man pages, POSIX, etc!