Make tree serde-serializable

techtree-manager/Cargo.lock

@@ -964,6 +964,7 @@ dependencies = [
  "hashbrown",
  "indexmap",
  "serde",
+ "serde_derive",
 ]
 
 [[package]]

techtree-manager/Cargo.toml

@@ -13,7 +13,7 @@ chrono = "0.4.41"
 env_logger = { version = "0.11.8", default-features = false, features = ["auto-color", "color", "humantime"] }
 forgejo-api = { git = "https://git.fa-fo.de/rahix/forgejo-api.git", rev = "a3f6452cfe774898a89ac66be393e5205f5e12b7" }
 log = "0.4.27"
-petgraph = "0.8.1"
+petgraph = { version = "0.8.1", features = ["serde-1"] }
 serde = { version = "1.0.219", features = ["derive"] }
 serde_json = "1.0.140"
 sha256 = "1.6.0"

techtree-manager/src/tree.rs

@@ -113,8 +113,10 @@ impl std::fmt::Display for ElementStatus {
 
 pub type ElementIndex = petgraph::graph::NodeIndex;
 
+#[derive(serde::Serialize)]
 pub struct Tree {
     graph: petgraph::Graph<Element, ()>,
+    #[serde(skip)]
     issue_map: BTreeMap<u64, ElementIndex>,
 }