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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,90 @@ | ||
| //! Example credential provider that stores credentials in a JSON file. | ||
| //! This is not secure | ||
| use cargo_credential::{ | ||
| Action, CacheControl, Credential, CredentialResponse, RegistryInfo, Secret, | ||
| }; | ||
| use std::{collections::HashMap, fs::File, io::ErrorKind}; | ||
| type Error = Box<dyn std::error::Error + Send + Sync + 'static>; | ||
|
|
||
| struct FileCredential; | ||
|
|
||
| impl Credential for FileCredential { | ||
| fn perform( | ||
| &self, | ||
| registry: &RegistryInfo, | ||
| action: &Action, | ||
| _args: &[&str], | ||
| ) -> Result<CredentialResponse, cargo_credential::Error> { | ||
| if registry.index_url != "https://github.com/rust-lang/crates.io-index" { | ||
| // Restrict this provider to only work for crates.io. Cargo will skip it and attempt | ||
| // another provider for any other registry. | ||
| // | ||
| // If a provider supports any registry, then this check should be omitted. | ||
| return Err(cargo_credential::Error::UrlNotSupported); | ||
| } | ||
|
|
||
| // `Error::Other` takes a boxed `std::error::Error` type that causes Cargo to show the error. | ||
| let mut creds = FileCredential::read().map_err(cargo_credential::Error::Other)?; | ||
|
|
||
| match action { | ||
| Action::Get(_) => { | ||
| // Cargo requested a token, look it up. | ||
| if let Some(token) = creds.get(registry.index_url) { | ||
| Ok(CredentialResponse::Get { | ||
| token: token.clone(), | ||
| cache: CacheControl::Session, | ||
| operation_independent: true, | ||
| }) | ||
| } else { | ||
| // Credential providers should respond with `NotFound` when a credential can not be | ||
| // found, allowing Cargo to attempt another provider. | ||
| Err(cargo_credential::Error::NotFound) | ||
| } | ||
| } | ||
| Action::Login(login_options) => { | ||
| // The token for `cargo login` can come from the `login_options` parameter or i | ||
| // interactively reading from stdin. | ||
| // | ||
| // `cargo_credential::read_token` automatically handles this. | ||
| let token = cargo_credential::read_token(login_options, registry)?; | ||
| creds.insert(registry.index_url.to_string(), token); | ||
|
|
||
| FileCredential::write(&creds).map_err(cargo_credential::Error::Other)?; | ||
|
|
||
| // Credentials were successfully stored. | ||
| Ok(CredentialResponse::Login) | ||
| } | ||
| Action::Logout => { | ||
| if creds.remove(registry.index_url).is_none() { | ||
| // If the user attempts to log out from a registry that has no credentials | ||
| // stored, then NotFound is the appropriate error. | ||
| Err(cargo_credential::Error::NotFound) | ||
| } else { | ||
| // Credentials were successfully erased. | ||
| Ok(CredentialResponse::Logout) | ||
| } | ||
| } | ||
| // If a credential provider doesn't support a given operation, it should respond with `OperationNotSupported`. | ||
| _ => Err(cargo_credential::Error::OperationNotSupported), | ||
| } | ||
| } | ||
| } | ||
|
|
||
| impl FileCredential { | ||
| fn read() -> Result<HashMap<String, Secret<String>>, Error> { | ||
| match File::open("cargo-credentials.json") { | ||
| Ok(f) => Ok(serde_json::from_reader(f)?), | ||
| Err(e) if e.kind() == ErrorKind::NotFound => Ok(HashMap::new()), | ||
| Err(e) => Err(e)?, | ||
| } | ||
| } | ||
| fn write(value: &HashMap<String, Secret<String>>) -> Result<(), Error> { | ||
| let file = File::create("cargo-credentials.json")?; | ||
| Ok(serde_json::to_writer_pretty(file, value)?) | ||
| } | ||
| } | ||
|
|
||
| fn main() { | ||
| cargo_credential::main(FileCredential); | ||
| } |
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