Switch to canon-json

canon-json provides a serde_json Formatter to serialize
as RFC 8785 canonical JSON.
It's a drop in replacement for olpc-cjson.

Signed-off-by: Etienne Champetier <[email protected]>

Author: champtar

Cargo.toml

@@ -10,7 +10,6 @@ keywords = ["oci", "opencontainers", "docker", "podman", "containers"]
 [dependencies]
 camino = "1.0.4"
 chrono = "0.4.19"
-olpc-cjson = "0.1.1"
 cap-std-ext = "4.0"
 flate2 = { features = ["zlib"], default-features = false, version = "1.0.20" }
 hex = "0.4.3"
@@ -21,6 +20,7 @@ tar = "0.4.38"
 thiserror = "2"
 oci-spec = "0.7.0"
 zstd = { version = "0.13.2", optional = true }
+canon-json = "0.2.0"
 
 [dev-dependencies]
 anyhow = "1.0.89"

src/lib.rs

@@ -1,5 +1,6 @@
 #![doc = include_str!("../README.md")]
 
+use canon_json::CanonicalFormatter;
 use cap_std::fs::{Dir, DirBuilderExt};
 use cap_std_ext::cap_tempfile;
 use cap_std_ext::dirext::CapStdExtDirExt;
@@ -9,7 +10,6 @@ use oci_spec::image::{
     self as oci_image, Descriptor, Digest, ImageConfiguration, ImageIndex, ImageManifest,
     Sha256Digest,
 };
-use olpc_cjson::CanonicalFormatter;
 use openssl::hash::{Hasher, MessageDigest};
 use serde::{Deserialize, Serialize};
 use std::collections::{HashMap, HashSet};