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67ffa00b1d
Temporarily vendor opencontainers/image-spec from a fork to fix "id" value duplication, which is detected and refused by gojsonschema now ( https://github.com/opencontainers/image-spec/pull/750 ). Signed-off-by: Miloslav Trmač <mitr@redhat.com>
77 lines
3.4 KiB
Go
77 lines
3.4 KiB
Go
// Copyright 2016 The Linux Foundation
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package schema
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import (
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"net/http"
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"github.com/opencontainers/image-spec/specs-go/v1"
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)
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// Media types for the OCI image formats
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const (
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ValidatorMediaTypeDescriptor Validator = v1.MediaTypeDescriptor
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ValidatorMediaTypeLayoutHeader Validator = v1.MediaTypeLayoutHeader
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ValidatorMediaTypeManifest Validator = v1.MediaTypeImageManifest
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ValidatorMediaTypeImageIndex Validator = v1.MediaTypeImageIndex
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ValidatorMediaTypeImageConfig Validator = v1.MediaTypeImageConfig
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ValidatorMediaTypeImageLayer unimplemented = v1.MediaTypeImageLayer
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)
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var (
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// fs stores the embedded http.FileSystem
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// having the OCI JSON schema files in root "/".
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fs = _escFS(false)
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// schemaNamespaces is a set of URI prefixes which are treated as containing the schema files of fs.
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// This is necessary because *.json schema files in this directory use "id" and "$ref" attributes which evaluate to such URIs, e.g.
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// ./image-manifest-schema.json URI contains
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// "id": "https://opencontainers.org/schema/image/manifest",
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// and
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// "$ref": "content-descriptor.json"
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// which evaluates as a link to https://opencontainers.org/schema/image/content-descriptor.json .
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//
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// To support such links without accessing the network (and trying to load content which is not hosted at these URIs),
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// fsLoaderFactory accepts any URI starting with one of the schemaNamespaces below,
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// and uses _escFS to load them from the root of its in-memory filesystem tree.
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//
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// (Note that this must contain subdirectories before its parent directories for fsLoaderFactory.refContents to work.)
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schemaNamespaces = []string{
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"https://opencontainers.org/schema/image/descriptor/",
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"https://opencontainers.org/schema/image/index/",
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"https://opencontainers.org/schema/image/manifest/",
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"https://opencontainers.org/schema/image/",
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"https://opencontainers.org/schema/descriptor/",
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"https://opencontainers.org/schema/",
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}
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// specs maps OCI schema media types to schema URIs.
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// These URIs are expected to be used only by fsLoaderFactory (which trims schemaNamespaces defined above)
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// and should never cause a network access.
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specs = map[Validator]string{
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ValidatorMediaTypeDescriptor: "https://opencontainers.org/schema/content-descriptor.json",
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ValidatorMediaTypeLayoutHeader: "https://opencontainers.org/schema/image/image-layout-schema.json",
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ValidatorMediaTypeManifest: "https://opencontainers.org/schema/image/image-manifest-schema.json",
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ValidatorMediaTypeImageIndex: "https://opencontainers.org/schema/image/image-index-schema.json",
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ValidatorMediaTypeImageConfig: "https://opencontainers.org/schema/image/config-schema.json",
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}
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)
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// FileSystem returns an in-memory filesystem including the schema files.
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// The schema files are located at the root directory.
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func FileSystem() http.FileSystem {
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return fs
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}
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