Tweaks

.github/dependabot.yml

@@ -0,0 +1,8 @@
+version: 2
+updates:
+- package-ecosystem: cargo
+  directory: "/"
+  schedule:
+    interval: weekly
+    time: "13:00"
+  open-pull-requests-limit: 99

.github/workflows/rust.yml

@@ -0,0 +1,58 @@
+name: CI
+
+on:
+  push:
+    branches: ['main']
+  pull_request:
+  schedule:
+    - cron: "25 6 * * 5"
+
+jobs:
+  test:
+    strategy:
+      matrix:
+        os: [ubuntu-latest, macos-latest]
+        rust: [stable, beta]
+        exclude:
+          - os: macos-latest
+            rust: beta
+
+    runs-on: ${{ matrix.os }}
+
+    steps:
+      - uses: actions/checkout@v2
+      - uses: actions-rs/toolchain@v1
+        with:
+          profile: minimal
+          toolchain: ${{ matrix.rust }}
+          override: true
+      - uses: actions-rs/cargo@v1
+        with:
+          command: check
+          args: --all-features --all-targets
+
+  lint:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+      - uses: actions-rs/toolchain@v1
+        with:
+          profile: minimal
+          toolchain: stable
+          override: true
+          components: rustfmt, clippy
+      - uses: actions-rs/cargo@v1
+        with:
+          command: fmt
+          args: --all -- --check
+      - uses: actions-rs/cargo@v1
+        if: always()
+        with:
+          command: clippy
+          args: --workspace --all-targets --all-features -- -D warnings
+
+  audit:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v2
+    - uses: EmbarkStudios/cargo-deny-action@v1

Cargo.toml

@@ -29,3 +29,7 @@ url = "2"
 async-trait = "0.1"
 thiserror = "1.0"
 dirs-next = "2.0"
+
+[dev-dependencies]
+env_logger = "0.9"
+tokio = { version = "1.1", features = ["macros", "rt-multi-thread"] }

deny.toml

@@ -0,0 +1,9 @@
+[licenses]
+allow-osi-fsf-free = "either"
+copyleft = "deny"
+allow = ["MPL-2.0"]
+
+[[licenses.clarify]]
+name = "ring"
+expression = "ISC AND MIT AND OpenSSL"
+license-files = [{ path = "LICENSE", hash = 0xbd0eed23 }]

examples/simple.rs

@@ -2,6 +2,8 @@
 async fn main() -> Result<(), Box<dyn std::error::Error>> {
     env_logger::init();
     let authentication_manager = gcp_auth::init().await?;
-    let _token = authentication_manager.get_token(&["https://www.googleapis.com/auth/cloud-platform"]).await?;
+    let _token = authentication_manager
+        .get_token(&["https://www.googleapis.com/auth/cloud-platform"])
+        .await?;
     Ok(())
 }

src/authentication_manager.rs

@@ -1,7 +1,10 @@
-use crate::prelude::*;
+use async_trait::async_trait;
+
+use crate::error::Error;
+use crate::types::{HyperClient, Token};
 
 #[async_trait]
-pub trait ServiceAccount: Send + Sync {
+pub(crate) trait ServiceAccount: Send + Sync {
     async fn project_id(&self, client: &HyperClient) -> Result<String, Error>;
     fn get_token(&self, scopes: &[&str]) -> Option<Token>;
     async fn refresh_token(&self, client: &HyperClient, scopes: &[&str]) -> Result<Token, Error>;

src/custom_service_account.rs

@@ -1,30 +1,29 @@
-use crate::authentication_manager::ServiceAccount;
-use crate::error::Error::AplicationProfileMissing;
-use crate::prelude::*;
+use std::collections::HashMap;
+use std::path::Path;
 use std::sync::RwLock;
+
+use async_trait::async_trait;
+use serde::{Deserialize, Serialize};
 use tokio::fs;
 
+use crate::authentication_manager::ServiceAccount;
+use crate::error::Error;
+use crate::types::{HyperClient, Token};
+use crate::util::HyperExt;
+
 #[derive(Debug)]
-pub struct CustomServiceAccount {
+pub(crate) struct CustomServiceAccount {
     tokens: RwLock<HashMap<Vec<String>, Token>>,
     credentials: ApplicationCredentials,
 }
 
 impl CustomServiceAccount {
-    pub async fn from_file(path: &str) -> Result<Self, Error> {
-        let credentials = ApplicationCredentials::from_file(path).await?;
+    pub(crate) async fn from_file(path: &Path) -> Result<Self, Error> {
         Ok(Self {
-            credentials,
+            credentials: ApplicationCredentials::from_file(path).await?,
             tokens: RwLock::new(HashMap::new()),
         })
     }
-
-    pub async fn from_env() -> Result<Self, Error> {
-        const GOOGLE_APPLICATION_CREDENTIALS: &str = "GOOGLE_APPLICATION_CREDENTIALS";
-        let path =
-            std::env::var(GOOGLE_APPLICATION_CREDENTIALS).map_err(|_| AplicationProfileMissing)?;
-        CustomServiceAccount::from_file(&path).await
-    }
 }
 
 #[async_trait]
@@ -43,12 +42,12 @@ impl ServiceAccount for CustomServiceAccount {
 
     async fn refresh_token(&self, client: &HyperClient, scopes: &[&str]) -> Result<Token, Error> {
         use crate::jwt::Claims;
-        use crate::jwt::JWTSigner;
+        use crate::jwt::JwtSigner;
         use crate::jwt::GRANT_TYPE;
         use hyper::header;
         use url::form_urlencoded;
 
-        let signer = JWTSigner::new(&self.credentials.private_key)?;
+        let signer = JwtSigner::new(&self.credentials.private_key)?;
 
         let claims = Claims::new(&self.credentials, scopes, None);
         let signed = signer.sign_claims(&claims).map_err(Error::TLSError)?;
@@ -73,33 +72,33 @@ impl ServiceAccount for CustomServiceAccount {
 }
 
 #[derive(Serialize, Deserialize, Debug, Clone)]
-pub struct ApplicationCredentials {
-    pub r#type: Option<String>,
+pub(crate) struct ApplicationCredentials {
+    pub(crate) r#type: Option<String>,
     /// project_id
-    pub project_id: Option<String>,
+    pub(crate) project_id: Option<String>,
     /// private_key_id
-    pub private_key_id: Option<String>,
+    pub(crate) private_key_id: Option<String>,
     /// private_key
-    pub private_key: String,
+    pub(crate) private_key: String,
     /// client_email
-    pub client_email: String,
+    pub(crate) client_email: String,
     /// client_id
-    pub client_id: Option<String>,
+    pub(crate) client_id: Option<String>,
     /// auth_uri
-    pub auth_uri: Option<String>,
+    pub(crate) auth_uri: Option<String>,
     /// token_uri
-    pub token_uri: String,
+    pub(crate) token_uri: String,
     /// auth_provider_x509_cert_url
-    pub auth_provider_x509_cert_url: Option<String>,
+    pub(crate) auth_provider_x509_cert_url: Option<String>,
     /// client_x509_cert_url
-    pub client_x509_cert_url: Option<String>,
+    pub(crate) client_x509_cert_url: Option<String>,
 }
 
 impl ApplicationCredentials {
     async fn from_file<T: AsRef<Path>>(path: T) -> Result<ApplicationCredentials, Error> {
         let content = fs::read_to_string(path)
             .await
-            .map_err(Error::AplicationProfilePath)?;
-        Ok(serde_json::from_str(&content).map_err(Error::AplicationProfileFormat)?)
+            .map_err(Error::ApplicationProfilePath)?;
+        Ok(serde_json::from_str(&content).map_err(Error::ApplicationProfileFormat)?)
     }
 }

src/default_authorized_user.rs

@@ -1,12 +1,19 @@
-use crate::authentication_manager::ServiceAccount;
-use crate::prelude::*;
-use hyper::body::Body;
-use hyper::Method;
+use std::path::Path;
 use std::sync::RwLock;
+
+use async_trait::async_trait;
+use hyper::body::Body;
+use hyper::{Method, Request};
+use serde::{Deserialize, Serialize};
 use tokio::fs;
 
+use crate::authentication_manager::ServiceAccount;
+use crate::error::Error;
+use crate::types::{HyperClient, Token};
+use crate::util::HyperExt;
+
 #[derive(Debug)]
-pub struct DefaultAuthorizedUser {
+pub(crate) struct DefaultAuthorizedUser {
     token: RwLock<Token>,
 }
 
@@ -15,7 +22,7 @@ impl DefaultAuthorizedUser {
     const USER_CREDENTIALS_PATH: &'static str =
         ".config/gcloud/application_default_credentials.json";
 
-    pub async fn new(client: &HyperClient) -> Result<Self, Error> {
+    pub(crate) async fn new(client: &HyperClient) -> Result<Self, Error> {
         let token = RwLock::new(Self::get_token(client).await?);
         Ok(Self { token })
     }
@@ -33,10 +40,8 @@ impl DefaultAuthorizedUser {
         log::debug!("Loading user credentials file");
         let mut home = dirs_next::home_dir().ok_or(Error::NoHomeDir)?;
         home.push(Self::USER_CREDENTIALS_PATH);
-        let cred =
-            UserCredentials::from_file(home.display().to_string())
-                .await?;
-        let req = Self::build_token_request(&RerfeshRequest {
+        let cred = UserCredentials::from_file(home.display().to_string()).await?;
+        let req = Self::build_token_request(&RefreshRequest {
             client_id: cred.client_id,
             client_secret: cred.client_secret,
             grant_type: "refresh_token".to_string(),
@@ -70,7 +75,7 @@ impl ServiceAccount for DefaultAuthorizedUser {
 }
 
 #[derive(Serialize, Debug)]
-struct RerfeshRequest {
+struct RefreshRequest {
     client_id: String,
     client_secret: String,
     grant_type: String,
@@ -80,13 +85,13 @@ struct RerfeshRequest {
 #[derive(Serialize, Deserialize, Debug, Clone)]
 struct UserCredentials {
     /// Client id
-    pub client_id: String,
+    pub(crate) client_id: String,
     /// Client secret
-    pub client_secret: String,
+    pub(crate) client_secret: String,
     /// Refresh Token
-    pub refresh_token: String,
+    pub(crate) refresh_token: String,
     /// Type
-    pub r#type: String,
+    pub(crate) r#type: String,
 }
 
 impl UserCredentials {

src/default_service_account.rs

@@ -1,12 +1,17 @@
-use crate::authentication_manager::ServiceAccount;
-use crate::prelude::*;
-use hyper::body::Body;
-use hyper::Method;
 use std::str;
 use std::sync::RwLock;
 
+use async_trait::async_trait;
+use hyper::body::Body;
+use hyper::{Method, Request};
+
+use crate::authentication_manager::ServiceAccount;
+use crate::error::Error;
+use crate::types::{HyperClient, Token};
+use crate::util::HyperExt;
+
 #[derive(Debug)]
-pub struct DefaultServiceAccount {
+pub(crate) struct DefaultServiceAccount {
     token: RwLock<Token>,
 }
 
@@ -15,7 +20,7 @@ impl DefaultServiceAccount {
         "http://metadata.google.internal/computeMetadata/v1/project/project-id";
     const DEFAULT_TOKEN_GCP_URI: &'static str = "http://metadata.google.internal/computeMetadata/v1/instance/service-accounts/default/token";
 
-    pub async fn new(client: &HyperClient) -> Result<Self, Error> {
+    pub(crate) async fn new(client: &HyperClient) -> Result<Self, Error> {
         let token = RwLock::new(Self::get_token(client).await?);
         Ok(Self { token })
     }

src/error.rs

@@ -32,20 +32,20 @@ pub enum Error {
     /// GOOGLE_APPLICATION_CREDENTIALS is used for providing path to json file with applications credentials.
     /// File can be donwoloaded in GCP Console when creating service account.
     #[error("Path to custom auth credentials was not provided in `GOOGLE_APPLICATION_CREDENTIALS` env variable")]
-    AplicationProfileMissing,
+    ApplicationProfileMissing,
 
     /// Wrong path to custom application profile credentials provided
     ///
     /// Path has to be defined using `GOOGLE_APPLICATION_CREDENTIALS` environment variable
     #[error("Environment variable `GOOGLE_APPLICATION_CREDENTIALS` contains invalid path to application profile file")]
-    AplicationProfilePath(std::io::Error),
+    ApplicationProfilePath(std::io::Error),
 
     /// Wrong format of custom application profile
     ///
     /// Application profile is downloaded from GCP console and is stored in filesystem on the server.
     /// Full path is passed to library by seeting `GOOGLE_APPLICATION_CREDENTIALS` variable with path as a value.
     #[error("Application profile provided in `GOOGLE_APPLICATION_CREDENTIALS` was not parsable")]
-    AplicationProfileFormat(serde_json::error::Error),
+    ApplicationProfileFormat(serde_json::error::Error),
 
     /// Default user profile not found
     ///