chore: package.rust-versionを書く

Cargo.toml

@@ -111,6 +111,7 @@ rev = "de226a26e8e18edbdb1d6f986afe37bbbf35fbf4"
 version = "0.0.0"
 edition = "2021"
 publish = false
+rust-version = "1.81.0"
 
 # min-sized-rustを元にrelease buildのサイズが小さくなるようにした
 # https://github.com/johnthagen/min-sized-rust

crates/downloader/Cargo.toml

@@ -1,6 +1,7 @@
 [package]
 name = "downloader"
 edition.workspace = true
+rust-version.workspace = true
 
 [[bin]]
 name = "download"

crates/test_util/Cargo.toml

@@ -1,6 +1,7 @@
 [package]
 name = "test_util"
 edition.workspace = true
+rust-version.workspace = true
 
 [dependencies]
 libloading.workspace = true

crates/voicevox_core/Cargo.toml

@@ -3,6 +3,7 @@ name = "voicevox_core"
 version.workspace = true
 edition.workspace = true
 publish.workspace = true
+rust-version.workspace = true
 
 [package.metadata.docs.rs]
 features = ["load-onnxruntime", "link-onnxruntime"]

crates/voicevox_core_c_api/Cargo.toml

@@ -3,6 +3,7 @@ name = "voicevox_core_c_api"
 version.workspace = true
 edition.workspace = true
 publish.workspace = true
+rust-version.workspace = true
 
 [lib]
 crate-type = ["cdylib"]

crates/voicevox_core_java_api/Cargo.toml

@@ -3,6 +3,7 @@ name = "voicevox_core_java_api"
 version.workspace = true
 edition.workspace = true
 publish.workspace = true
+rust-version.workspace = true
 
 [lib]
 crate-type = ["cdylib"]

crates/voicevox_core_macros/Cargo.toml

@@ -3,6 +3,7 @@ name = "voicevox_core_macros"
 version.workspace = true
 edition.workspace = true
 publish.workspace = true
+rust-version.workspace = true
 
 [lib]
 name = "macros"

crates/voicevox_core_python_api/Cargo.toml

@@ -3,6 +3,7 @@ name = "voicevox_core_python_api"
 version = "0.0.0"
 edition.workspace = true
 publish.workspace = true
+rust-version.workspace = true
 
 [lib]
 crate-type = ["cdylib"]

crates/xtask/Cargo.toml

@@ -1,6 +1,7 @@
 [package]
 name = "xtask"
 edition.workspace = true
+rust-version.workspace = true
 
 [dependencies]
 cbindgen.workspace = true

renovate.json5

@@ -86,5 +86,17 @@
       packageNameTemplate: "rust-lang/rust",
       datasourceTemplate: "github-tags",
     },
+    {
+      customType: "regex",
+      fileMatch: [
+        "^Cargo.toml$",
+      ],
+      matchStrings: [
+        "rust-version = \"(?<currentValue>\\d+\\.\\d+\\.\\d+)\"",
+      ],
+      depNameTemplate: "Rust",
+      packageNameTemplate: "rust-lang/rust",
+      datasourceTemplate: "github-tags",
+    },
   ],
 }