Module client

Expand description

GitHub API client for authenticated operations.

This module provides the primary interface for interacting with GitHub’s REST API as a GitHub App. It handles authentication, rate limiting, retries, pagination, and provides type-safe operations for repositories, issues, pull requests, projects, and more.

§Overview

The client operates at two levels:

App-level (GitHubClient) - Operations as the GitHub App itself (using JWT)
Installation-level (InstallationClient) - Operations within a specific installation (using installation tokens)

Most operations happen at the installation level, where you interact with repositories, issues, pull requests, etc. on behalf of the installation.

§Features

Automatic Authentication - Tokens are injected and refreshed automatically
Rate Limit Handling - Detects rate limits and backs off appropriately
Retry Logic - Exponential backoff for transient failures (network errors, 5xx responses)
Pagination Support - Helper methods for paginated API responses
Type Safety - Strongly-typed request and response models
Configurable - Timeouts, retry behavior, rate limit margins

§Quick Start

use github_bot_sdk::{
    auth::{AuthenticationProvider, InstallationId},
    client::{GitHubClient, ClientConfig},
    error::ApiError,
};
use std::time::Duration;

// Create client with custom configuration
let client = GitHubClient::builder(auth)
    .config(ClientConfig::default()
        .with_user_agent("my-bot/1.0")
        .with_timeout(Duration::from_secs(30))
        .with_max_retries(5))
    .build()?;

// Get app information (app-level operation)
let app = client.get_app().await?;
println!("Running as: {}", app.name);

// Get installation information
let installation_id = InstallationId::new(12345);
let installation = client.get_installation(installation_id).await?;
println!("Installation: {}", installation.id.as_u64());

§Configuration

Use ClientConfig to customize client behavior:

use github_bot_sdk::client::ClientConfig;
use std::time::Duration;

let config = ClientConfig::default()
    .with_user_agent("my-github-bot/1.0")           // Required by GitHub
    .with_timeout(Duration::from_secs(60))          // Request timeout
    .with_max_retries(5)                            // Max retry attempts
    .with_rate_limit_margin(0.1)                    // Keep 10% rate limit buffer
    .with_github_api_url("https://api.github.com"); // Override for GHE

// Or use the builder pattern
let config = ClientConfig::builder()
    .user_agent("my-bot/2.0")
    .timeout(Duration::from_secs(45))
    .max_retries(3)
    .build();

§Operations by Category

§Repository Operations

let installation_id = InstallationId::new(12345);
let _installation = client.get_installation(installation_id).await?;

// Repository operations are available through client methods
// See InstallationClient and related modules for detailed API

§Issue Operations

let installation_id = InstallationId::new(12345);
let _installation = client.get_installation(installation_id).await?;

// Issue operations through client methods
// Create, comment, label, and manage issues

§Pull Request Operations

let installation_id = InstallationId::new(12345);
let _installation = client.get_installation(installation_id).await?;

// Pull request operations through client methods
// Create, review, merge, and manage PRs

§Project Operations (GitHub Projects V2)

let installation_id = InstallationId::new(12345);
let _installation = client.get_installation(installation_id).await?;

// Project operations through client methods

§Rate Limiting

The client automatically handles GitHub’s rate limits:

Detection - Monitors X-RateLimit-* headers in responses
Proactive Backoff - Slows down when approaching limit (configurable margin)
Reactive Handling - Respects Retry-After headers on 429 responses
Secondary Rate Limits - Handles abuse detection (403 with retry-after)

// Configure rate limit behavior
let config = ClientConfig::default()
    .with_rate_limit_margin(0.15);  // Start backing off at 85% of limit

let client = GitHubClient::builder(auth)
    .config(config)
    .build()?;

// Client will automatically handle rate limits
// No manual rate limit checking needed

§Retry Behavior

The client automatically retries transient failures with exponential backoff:

Retryable Errors:
- Network errors (timeouts, connection failures)
- 5xx server errors (GitHub is having issues)
- 429 rate limit exceeded (respects Retry-After)
- 403 with Retry-After (secondary rate limit)
Non-Retryable Errors:
- 4xx client errors (except 429 and some 403s)
- Authentication failures
- Validation errors

use github_bot_sdk::client::ClientConfig;
use std::time::Duration;

// Configure retry behavior
let config = ClientConfig::default()
    .with_max_retries(5)                            // Max attempts
    .with_timeout(Duration::from_secs(30));         // Request timeout

// Default exponential backoff is applied automatically

§Pagination

GitHub’s API uses Link headers for pagination. See specific operation documentation for examples.

let installation_id = InstallationId::new(12345);

// Get installation
let installation = client.get_installation(installation_id).await?;
println!("Installation: {}", installation.id.as_u64());

§Error Handling

All operations return Result<T, ApiError>:

let installation_id = InstallationId::new(12345);

// Error handling example
match client.get_installation(installation_id).await {
    Ok(installation) => println!("Found installation: {}", installation.id.as_u64()),
    Err(ApiError::NotFound { .. }) => {
        println!("Installation doesn't exist or no access");
    }
    Err(ApiError::RateLimitExceeded { reset_at, .. }) => {
        println!("Rate limited, resets at: {:?}", reset_at);
    }
    Err(ApiError::AuthorizationFailed) => {
        println!("Insufficient permissions");
    }
    Err(e) => return Err(e),
}

§GitHub Enterprise Support

To use with GitHub Enterprise Server, configure the API base URL:

use github_bot_sdk::client::ClientConfig;

let config = ClientConfig::default()
    .with_github_api_url("https://github.example.com/api/v3");

§See Also

crate::auth - Authentication types and providers
crate::webhook - Webhook validation for incoming events
GitHub REST API Documentation

Structs§

AddProjectV2ItemRequest: Request to add an item to a project.
App: GitHub App metadata.
Branch: Git branch with commit information.
ClientConfig: Configuration for GitHub API client behavior.
ClientConfigBuilder: Builder for constructing ClientConfig instances.
Comment: Comment on an issue.
Commit: Commit reference (used in branches, tags, and pull requests).
CommitDetails: Git-level commit metadata.
CommitReference: A minimal reference to a Git object containing only its SHA and API URL.
Comparison: The result of comparing two Git refs (commits, branches, or tags).
CreateCommentRequest: Request to create a comment.
CreateIssueRequest: Request to create a new issue.
CreateLabelRequest: Request to create a label.
CreatePullRequestCommentRequest: Request to create a pull request comment.
CreatePullRequestRequest: Request to create a new pull request.
CreateReleaseRequest: Request to create a release.
CreateReviewRequest: Request to create a review.
DismissReviewRequest: Request to dismiss a review.
FileChange: A single file change within a Comparison.
FullCommit: A complete GitHub commit with all metadata.
GitHubClient: GitHub API client for authenticated operations.
GitHubClientBuilder: Builder for constructing GitHubClient instances.
GitRef: Git reference (branch, tag, etc.).
GitSignature: An identity record stored in a Git commit object.
InstallationClient: Installation-scoped GitHub API client.
Issue: GitHub issue.
IssueUser: User associated with an issue.
Label: GitHub label.
MergePullRequestRequest: Request to merge a pull request.
MergeResult: Result of merging a pull request.
Milestone: Milestone associated with an issue or pull request.
PagedResponse: Paginated response wrapper.
Pagination: Pagination metadata extracted from Link headers.
ProjectOwner: Project owner (organisation or user).
ProjectV2: GitHub Projects v2 project.
ProjectV2Item: Item in a GitHub Projects v2 project.
PullRequest: GitHub pull request.
PullRequestBranch: Branch information in a pull request.
PullRequestComment: Comment on a pull request (review comment on code).
PullRequestRepo: Repository information in a pull request branch.
RateLimit: Rate limit information from GitHub API response headers.
RateLimitInfo: Rate limit information from GitHub API.
RateLimiter: Thread-safe rate limit tracker for GitHub API operations.
Release: GitHub release.
ReleaseAsset: Asset attached to a release.
Repository: GitHub repository with metadata.
RepositoryOwner: Repository owner (user or organization).
RetryPolicy: Retry policy for transient errors.
Review: Pull request review.
SetIssueMilestoneRequest: Request to set milestone on an issue.
SetPullRequestMilestoneRequest: Request to set milestone on a pull request.
Tag: Git tag information.
TriggerWorkflowRequest: Request to trigger a workflow.
UpdateCommentRequest: Request to update a comment.
UpdateIssueRequest: Request to update an existing issue.
UpdateLabelRequest: Request to update a label.
UpdatePullRequestRequest: Request to update an existing pull request.
UpdateReleaseRequest: Request to update a release.
UpdateReviewRequest: Request to update a review.
Verification: GPG or SSH signature verification status for a commit.
Workflow: GitHub Actions workflow.
WorkflowRun: GitHub Actions workflow run.

Enums§

OwnerType: Owner type classification.
RateLimitContext: Authentication context for rate limit tracking.

Functions§

calculate_rate_limit_delay: Calculate delay for rate limit exceeded (429) response.
detect_secondary_rate_limit: Detect secondary rate limit (abuse detection) from 403 response.
extract_page_number: Extract page number from a URL.
parse_link_header: Parse pagination metadata from Link header.
parse_rate_limit_from_headers: Parse rate limit information from HTTP response headers.
parse_retry_after: Parse Retry-After header from HTTP response.

Module client

Module client Copy item path

§Overview

§Features

§Quick Start

§Configuration

§Operations by Category

§Repository Operations

§Issue Operations

§Pull Request Operations

§Project Operations (GitHub Projects V2)

§Rate Limiting

§Retry Behavior

§Pagination

§Error Handling

§GitHub Enterprise Support

§See Also

Structs§

Enums§

Functions§

Module client