From dfb37c0c871657daa20b1e58934a087d5915f4a6 Mon Sep 17 00:00:00 2001
From: "dependabot[bot]" <49699333+dependabot[bot]@users.noreply.github.com>
Date: Mon, 10 Aug 2026 21:05:42 +0000
Subject: [PATCH 1/2] Bump prettyplease from 0.2.37 to 0.3.0 in
 /tools/runtime-codegen

Bumps [prettyplease](https://github.com/dtolnay/prettyplease) from 0.2.37 to 0.3.0.
- [Release notes](https://github.com/dtolnay/prettyplease/releases)
- [Commits](https://github.com/dtolnay/prettyplease/compare/0.2.37...0.3.0)

---
updated-dependencies:
- dependency-name: prettyplease
  dependency-version: 0.3.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>
---
 tools/runtime-codegen/Cargo.lock | 14 ++++++++++++--
 tools/runtime-codegen/Cargo.toml |  2 +-
 2 files changed, 13 insertions(+), 3 deletions(-)

diff --git a/tools/runtime-codegen/Cargo.lock b/tools/runtime-codegen/Cargo.lock
index bcce1e5589..be83ceb09b 100644
--- a/tools/runtime-codegen/Cargo.lock
+++ b/tools/runtime-codegen/Cargo.lock
@@ -1204,7 +1204,7 @@ dependencies = [
  "blake2",
  "file-guard",
  "fs-err",
- "prettyplease",
+ "prettyplease 0.2.37",
  "proc-macro2",
  "quote",
  "syn 2.0.118",
@@ -2634,6 +2634,16 @@ dependencies = [
  "syn 2.0.118",
 ]
 
+[[package]]
+name = "prettyplease"
+version = "0.3.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "2bfe0f4c752e450fc2faf62654f1c134747922825d5b04ca717b8874f41a40c0"
+dependencies = [
+ "proc-macro2",
+ "syn 3.0.1",
+]
+
 [[package]]
 name = "primitive-types"
 version = "0.13.1"
@@ -2879,7 +2889,7 @@ dependencies = [
  "color-eyre",
  "indoc",
  "parity-scale-codec",
- "prettyplease",
+ "prettyplease 0.3.0",
  "proc-macro2",
  "subxt-codegen",
  "subxt-utils-fetchmetadata",
diff --git a/tools/runtime-codegen/Cargo.toml b/tools/runtime-codegen/Cargo.toml
index 3ca509a14d..6505ac30fa 100644
--- a/tools/runtime-codegen/Cargo.toml
+++ b/tools/runtime-codegen/Cargo.toml
@@ -16,7 +16,7 @@ clap = { version = "4.5.3", features = ["derive", "cargo"] }
 codec = { package = "parity-scale-codec", version = "3.7.4", features = ["derive"] }
 color-eyre = "0.6.1"
 indoc = "2.0.5"
-prettyplease = "0.2.20"
+prettyplease = "0.3.0"
 proc-macro2 = "1.0.56"
 subxt-codegen = { version = "0.44.0" }
 subxt-utils-fetchmetadata = { version = "0.44.0", features = ["url"] }

From ce2bdfb6d00520a0181b087672c194a48eb21eef Mon Sep 17 00:00:00 2001
From: Branislav Kontur <bkontur@gmail.com>
Date: Mon, 10 Aug 2026 15:17:12 +0200
Subject: [PATCH 2/2] Fix runtime-codegen build against prettyplease 0.3

prettyplease 0.3 moved to syn 3, while subxt-codegen still exposes syn 2
types, so passing its `syn::File` to `prettyplease::unparse` no longer
compiles:

  error[E0308]: mismatched types
    expected `syn::file::File`, found `subxt_codegen::syn::File`

Add a direct syn 3 dependency and parse with it in `print_runtime`; the
type substitutes and derives keep using subxt-codegen's syn 2 re-export.

Verified with `SKIP_WASM_BUILD=1 cargo check --locked
--manifest-path tools/runtime-codegen/Cargo.toml` (the CI job's command).
---
 tools/runtime-codegen/Cargo.lock  | 1 +
 tools/runtime-codegen/Cargo.toml  | 2 ++
 tools/runtime-codegen/src/main.rs | 5 ++++-
 3 files changed, 7 insertions(+), 1 deletion(-)

diff --git a/tools/runtime-codegen/Cargo.lock b/tools/runtime-codegen/Cargo.lock
index be83ceb09b..1dddbb4afb 100644
--- a/tools/runtime-codegen/Cargo.lock
+++ b/tools/runtime-codegen/Cargo.lock
@@ -2893,6 +2893,7 @@ dependencies = [
  "proc-macro2",
  "subxt-codegen",
  "subxt-utils-fetchmetadata",
+ "syn 3.0.1",
  "wasm-loader",
  "wasm-testbed",
 ]
diff --git a/tools/runtime-codegen/Cargo.toml b/tools/runtime-codegen/Cargo.toml
index 6505ac30fa..4a9e4f26c3 100644
--- a/tools/runtime-codegen/Cargo.toml
+++ b/tools/runtime-codegen/Cargo.toml
@@ -20,5 +20,7 @@ prettyplease = "0.3.0"
 proc-macro2 = "1.0.56"
 subxt-codegen = { version = "0.44.0" }
 subxt-utils-fetchmetadata = { version = "0.44.0", features = ["url"] }
+# Must stay on the same major as `prettyplease`'s `syn`, see `print_runtime`.
+syn = { version = "3.0.0", features = ["full", "parsing"] }
 wasm-loader = { git = "https://github.com/chevdor/subwasm", branch = "master" }
 wasm-testbed = { git = "https://github.com/chevdor/subwasm", branch = "master" }
diff --git a/tools/runtime-codegen/src/main.rs b/tools/runtime-codegen/src/main.rs
index 9e09e31857..496848f05f 100644
--- a/tools/runtime-codegen/src/main.rs
+++ b/tools/runtime-codegen/src/main.rs
@@ -78,7 +78,10 @@ impl TypeSubstitute {
 }
 
 fn print_runtime(runtime_api: proc_macro2::TokenStream) {
-	let syn_tree = syn::parse_file(&runtime_api.to_string()).unwrap();
+	// `prettyplease` builds on `syn` 3, while `subxt-codegen` still exposes `syn` 2 types. Both
+	// versions are in the tree, so parse with our own `syn` (`::syn`, the 3.x one) instead of the
+	// re-export used everywhere else in this file.
+	let syn_tree = ::syn::parse_file(&runtime_api.to_string()).unwrap();
 	let pretty_runtime_api = prettyplease::unparse(&syn_tree);
 
 	indoc::printdoc!(