Implement OCI image spec

Cargo.toml

@@ -33,3 +33,6 @@ tonic = "0.3.1"
 [build-dependencies]
 anyhow = "1.0.32"
 tonic-build = "0.3.1"
+
+[workspace]
+members = ["crates/oci-image-spec"]

crates/oci-image-spec/Cargo.toml

@@ -0,0 +1,9 @@
+[package]
+name = "oci-image-spec"
+version = "0.1.0"
+authors = ["Lach <iam@lach.pw>"]
+edition = "2018"
+
+[dependencies]
+serde = { version = "1.0.115", features = ["derive"] }
+serde_json = "1.0.57"

crates/oci-image-spec/src/config.rs

@@ -0,0 +1,55 @@
+//! OpenContainer Config Specification
+use std::collections::HashMap;
+
+use serde::{Deserialize, Serialize};
+
+#[derive(Clone, PartialEq, Debug, Default, Deserialize, Serialize)]
+pub struct Config {
+    #[serde(rename = "Cmd")]
+    pub cmd: Option<Vec<String>>,
+    #[serde(rename = "Entrypoint")]
+    pub entrypoint: Option<Vec<String>>,
+    #[serde(rename = "Env")]
+    pub env: Option<Vec<String>>,
+    /// TODO: in original spec this is a map from string to object
+    /// serde_json::Value is the best type for this field which i can guess
+    #[serde(rename = "ExposedPorts")]
+    pub exposed_ports: Option<HashMap<String, serde_json::Value>>,
+    #[serde(rename = "Labels")]
+    pub labels: Option<HashMap<String, String>>,
+    #[serde(rename = "StopSignal")]
+    pub stop_signal: Option<String>,
+    #[serde(rename = "User")]
+    pub user: Option<String>,
+    #[serde(rename = "Volumes")]
+    pub volumes: Option<HashMap<String, serde_json::Value>>,
+    #[serde(rename = "WorkingDir")]
+    pub working_dir: Option<String>,
+}
+
+#[derive(Clone, PartialEq, Debug, Default, Deserialize, Serialize)]
+pub struct History {
+    pub author: Option<String>,
+    pub comment: Option<String>,
+    pub created: Option<String>,
+    pub created_by: Option<String>,
+    pub empty_layer: Option<bool>,
+}
+
+#[derive(Clone, PartialEq, Debug, Deserialize, Serialize)]
+pub struct HistoryRootfs {
+    pub diff_ids: Vec<String>,
+    #[serde(rename = "type")]
+    pub item_type: String,
+}
+
+#[derive(Clone, PartialEq, Debug, Deserialize, Serialize)]
+pub struct RootConfig {
+    pub architecture: String,
+    pub author: Option<String>,
+    pub config: Option<Config>,
+    pub created: Option<String>,
+    pub history: Option<Vec<History>>,
+    pub os: String,
+    pub rootfs: HistoryRootfs,
+}

crates/oci-image-spec/src/content_descriptor.rs

@@ -0,0 +1,16 @@
+use crate::defs::{Annotations, Digest, MediaType, Url};
+use serde::{Deserialize, Serialize};
+
+#[derive(Clone, PartialEq, Debug, Deserialize, Serialize)]
+pub struct ContentDescriptor {
+    pub annotations: Option<Annotations>,
+    /// the cryptographic checksum digest of the object, in the pattern '<algorithm>:<encoded>'
+    pub digest: Digest,
+    /// the mediatype of the referenced object
+    #[serde(rename = "mediaType")]
+    pub media_type: MediaType,
+    /// the size in bytes of the referenced object
+    pub size: i64,
+    /// a list of urls from which this object may be downloaded
+    pub urls: Option<Vec<Url>>,
+}

crates/oci-image-spec/src/defs.rs

@@ -0,0 +1,8 @@
+use std::collections::HashMap;
+
+pub type Annotations = HashMap<String, String>;
+/// the cryptographic checksum digest of the object, in the pattern '<algorithm>:<encoded>'
+pub type Digest = String;
+/// https://opencontainers.org/schema/image/descriptor/mediaType
+pub type MediaType = String;
+pub type Url = String;

crates/oci-image-spec/src/image_index.rs

@@ -0,0 +1,38 @@
+use super::defs::Annotations;
+use crate::defs::{Digest, MediaType, Url};
+use serde::{Deserialize, Serialize};
+
+#[derive(Clone, PartialEq, Debug, Deserialize, Serialize)]
+pub struct Platform {
+    pub architecture: String,
+    pub os: String,
+    #[serde(rename = "os.features")]
+    pub os_features: Option<Vec<String>>,
+    #[serde(rename = "os.version")]
+    pub os_version: Option<String>,
+    pub variant: Option<String>,
+}
+
+#[derive(Clone, PartialEq, Debug, Deserialize, Serialize)]
+pub struct Manifests {
+    pub annotations: Option<Annotations>,
+    /// the cryptographic checksum digest of the object, in the pattern '<algorithm>:<encoded>'
+    pub digest: Digest,
+    /// the mediatype of the referenced object
+    #[serde(rename = "mediaType")]
+    pub media_type: MediaType,
+    pub platform: Option<Platform>,
+    /// the size in bytes of the referenced object
+    pub size: i64,
+    /// a list of urls from which this object may be downloaded
+    pub urls: Option<Vec<Url>>,
+}
+
+#[derive(Clone, PartialEq, Debug, Deserialize, Serialize)]
+pub struct ImageIndex {
+    pub annotations: Option<Annotations>,
+    pub manifests: Vec<Manifests>,
+    /// This field specifies the image index schema version as an integer
+    #[serde(rename = "schemaVersion")]
+    pub schema_version: i64,
+}

crates/oci-image-spec/src/image_layout.rs

@@ -0,0 +1,8 @@
+use serde::{Deserialize, Serialize};
+
+#[derive(Clone, PartialEq, Debug, Deserialize, Serialize)]
+pub struct ImageLayout {
+    /// version of the OCI Image Layout (in the oci-layout file)
+    #[serde(rename = "imageLayoutVersion")]
+    pub image_layout_version: String,
+}

crates/oci-image-spec/src/image_manifest.rs

@@ -0,0 +1,12 @@
+use serde::{Deserialize, Serialize};
+
+use crate::{content_descriptor::ContentDescriptor, defs::Annotations};
+#[derive(Clone, PartialEq, Debug, Deserialize, Serialize)]
+pub struct ImageManifest {
+    pub annotations: Option<Annotations>,
+    pub config: ContentDescriptor,
+    pub layers: Vec<ContentDescriptor>,
+    /// This field specifies the image manifest schema version as an integer
+    #[serde(rename = "schemaVersion")]
+    pub schema_version: i64,
+}

crates/oci-image-spec/src/lib.rs

@@ -0,0 +1,6 @@
+pub mod config;
+pub mod content_descriptor;
+pub mod defs;
+pub mod image_index;
+pub mod image_layout;
+pub mod image_manifest;