astro/packages/integrations/image/src/metadata.ts

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Adds an `@astrojs/image` integration for optimizing images (#3694) * initial commit * WIP: starting to define interfaces for images and transformers * WIP: basic sharp service to test out the API setup * adding a few tests for sharp.toImageSrc * Adding tests for sharp.parseImageSrc * hooking up basic SSR support * updating image services to return width/height * simplifying config setup for v1 * hooking up basic SSR + SSG support (dev & build) * refactor: a bit of code cleanup and commenting * WIP: migrating local files to ESM + vite plugin * WIP: starting to hook up user-provided loaderEntryPoints * chore: update lock file * chore: update merged lockfile * refactor: code cleanup and type docs * pulling over the README template for first-party integrations * moving metadata out to the loader * updating the test for the refactored import * revert: remove unrelated webapi formatting * revert: remove unrelated change * fixing up the existing sharp tests * fix: vite plugin wasn't dynamically loading the image service properly * refactor: minor API renaming, removing last hard-coded use of sharp loader * don't manipulate src for hosted image services * Adding support for automatically calculating dimensions by aspect ratio, if needed * a few bug fixes + renaming the aspect ratio search param to "ar" * Adding ETag support, removing need for loaders to parse file metadata * using the battle tested `etag` package * Adding support for dynamically calculating partial sizes * refactor: moving to the packages/integrations dir, Astro Labs TBD later * refactor: renaming parse/serialize functions * Adding tests for SSG image optimizations * refactor: clean up outdated names related to ImageProps * nit: reusing cached SSG filename * chore: update pnpm lock file * handling file URLs when resolving local image imports * updating image file resolution to use file URLs * increasing test timeout for image build tests * fixing eslint error in sharp test * adding slash for windows compat in src URLs * chore: update lockfile after merge * Adding README content * adding a readme call to action for configuration options * review: A few of the quick updates from the PR review * hack: adds a one-off check to allow query params for the _image route * Adds support for src={import("...")}, and named component exports * adding SSR tests * nit: adding a bit more comments * limiting the query params in SSG dev to the images integration
2022-07-01 15:47:48 +00:00
import fs from 'fs/promises';
import sizeOf from 'image-size';
import { ImageMetadata, InputFormat } from './types';
export async function metadata(src: string): Promise<ImageMetadata | undefined> {
const file = await fs.readFile(src);
const { width, height, type } = await sizeOf(file);
if (!width || !height || !type) {
return undefined;
}
return {
src,
width,
height,
format: type as InputFormat
}
}