oci-spec-zig

OCI Runtime, Image and Distribution Spec in Zig.

This library provides a convenient way to interact with the specifications defined by the Open Container Initiative (OCI).

• Image Format Specification
• Runtime Specification
• Distribution Specification

Requirements

Zig version >= 0.14.0

Build

$ make build

Tests

To run unit-tests:

$ make test

To generate coverage first its requires to install kcov utility.

$ make .install.kcov
$ make coverage

Example

const std = @import("std");
const ocispec = @import("ocispec");
const image = ocispec.image;

pub fn main() !void {
    const media_manifest = image.MediaType.ImageManifest;
    const media_config = image.MediaType.ImageConfig;
    const media_layer = image.MediaType.ImageLayerGzip;

    var mlayers = std.ArrayList(image.Descriptor).init(std.heap.page_allocator);
    try mlayers.append(image.Descriptor{
        .mediaType = media_layer,
        .digest = try image.Digest.initFromString("sha256:9834876dcfb05cb167a5c24953eba58c4ac89b1adf57f28f2f9d09af107ee8f"),
        .size = 32654,
    });

    const manifest_layers: []image.Descriptor = try mlayers.toOwnedSlice();

    const manifest = image.Manifest{
        .mediaType = media_manifest,
        .config = image.Descriptor{
            .mediaType = media_config,
            .digest = try image.Digest.initFromString("sha256:b5b2b2c507a0944348e0303114d8d93aaaa081732b86451d9bce1f432a537bc7"),
            .size = 7023,
        },
        .layers = manifest_layers,
    };

    const manifest_content = try manifest.toStringPretty();

    const stdout_file = std.io.getStdOut().writer();
    var bw = std.io.bufferedWriter(stdout_file);
    const stdout = bw.writer();

    try stdout.print("{s}\n", .{manifest_content});

    try bw.flush();
}

License

Licensed under the MIT License.