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Aug 11, 2023
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doc: note the backward compatible .cargo/credential file exists #12479

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6 changes: 6 additions & 0 deletions src/doc/src/reference/config.md
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Expand Up @@ -318,6 +318,12 @@ be specified with environment variables of the form
`CARGO_REGISTRIES_<name>_TOKEN` where `<name>` is the name of the registry in
all capital letters.

> **Note:** Cargo also reads and writes credential files without the `.toml`
> extension, such as `.cargo/credentials`. Support for the `.toml` extension
> was added in version 1.39. In version 1.68, Cargo writes to the file with the
> extension by default. However, for backward compatibility reason, when both
> files exist, Cargo will read and write the file without the extension.

### Configuration keys

This section documents all configuration keys. The description for keys with
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