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import fetch from "node-fetch";
import { GithubRepo, ArtifactReleaseInfo } from "./interfaces";
const GITHUB_API_ENDPOINT_URL = "https://api.github.com";
/**
* Fetches the release with `releaseTag` (or just latest release when not specified)
* from GitHub `repo` and returns metadata about `artifactFileName` shipped with
* this release or `null` if no such artifact was published.
*/
export async function fetchArtifactReleaseInfo(
repo: GithubRepo, artifactFileName: string, releaseTag?: string
): Promise<null | ArtifactReleaseInfo> {
const repoOwner = encodeURIComponent(repo.owner);
const repoName = encodeURIComponent(repo.name);
const apiEndpointPath = releaseTag
? `/repos/${repoOwner}/${repoName}/releases/tags/${releaseTag}`
: `/repos/${repoOwner}/${repoName}/releases/latest`;
const requestUrl = GITHUB_API_ENDPOINT_URL + apiEndpointPath;
// We skip runtime type checks for simplicity (here we cast from `any` to `GithubRelease`)
console.log("Issuing request for released artifacts metadata to", requestUrl);
// FIXME: handle non-ok response
const response: GithubRelease = await fetch(requestUrl, {
headers: { Accept: "application/vnd.github.v3+json" }
})
.then(res => res.json());
const artifact = response.assets.find(artifact => artifact.name === artifactFileName);
if (!artifact) return null;
return {
releaseName: response.name,
downloadUrl: artifact.browser_download_url
};
// We omit declaration of tremendous amount of fields that we are not using here
interface GithubRelease {
name: string;
assets: Array<{
name: string;
browser_download_url: string;
}>;
}
}
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