feat: update to edition 2021 and set minimum rust to 1.56 (#2789)

Author: lucasfernog

.changes/rust-1.56.0.md

@@ -0,0 +1,14 @@
+---
+"tauri": patch
+"cli.rs": patch
+"tauri-bundler": patch
+"tauri-utils": patch
+"tauri-macros": patch
+"tauri-codegen": patch
+"tauri-runtime": patch
+"tauri-runtime-wry": patch
+"tauri-driver": patch
+"tauri-build": patch
+---
+
+The minimum Rust version is now `1.56`.

.github/workflows/test-core.yml

@@ -158,6 +158,11 @@ jobs:
 
     steps:
       - uses: actions/checkout@v2
+      - name: install stable
+        uses: actions-rs/toolchain@v1
+        with:
+          toolchain: stable
+          override: true
       - name: install webkit2gtk (ubuntu only)
         if: matrix.platform == 'ubuntu-latest'
         run: |

core/tauri-build/Cargo.toml

@@ -7,7 +7,8 @@ license = "Apache-2.0 OR MIT"
 homepage = "https://tauri.studio"
 repository = "https://github.com/tauri-apps/tauri/tree/dev/core/tauri-build"
 description = "build time code to pair with https://crates.io/crates/tauri"
-edition = "2018"
+edition = "2021"
+rust-version = "1.56"
 exclude = [ ".license_template", "CHANGELOG.md", "/target" ]
 readme = "README.md"
 

core/tauri-codegen/Cargo.toml

@@ -7,7 +7,8 @@ license = "Apache-2.0 OR MIT"
 homepage = "https://tauri.studio"
 repository = "https://github.com/tauri-apps/tauri/tree/dev/core/tauri-codegen"
 description = "code generation meant to be consumed inside of `tauri` through `tauri-build` or `tauri-macros`"
-edition = "2018"
+edition = "2021"
+rust-version = "1.56"
 exclude = [ ".license_template", "CHANGELOG.md", "/target" ]
 readme = "README.md"
 

core/tauri-macros/Cargo.toml

@@ -7,7 +7,8 @@ license = "Apache-2.0 OR MIT"
 homepage = "https://tauri.studio"
 repository = "https://github.com/tauri-apps/tauri"
 description = "Macros for the tauri crate."
-edition = "2018"
+edition = "2021"
+rust-version = "1.56"
 exclude = [ ".license_template", "CHANGELOG.md", "/target" ]
 readme = "README.md"
 

core/tauri-macros/src/command/handler.rs

@@ -16,7 +16,7 @@ pub struct Handler {
 }
 
 impl Parse for Handler {
-  fn parse(input: &ParseBuffer) -> syn::Result<Self> {
+  fn parse(input: &ParseBuffer<'_>) -> syn::Result<Self> {
     let paths = input.parse_terminated::<Path, Token![,]>(Path::parse)?;
 
     // parse the command names and wrappers from the passed paths

core/tauri-macros/src/command/wrapper.rs

@@ -19,7 +19,7 @@ enum ExecutionContext {
 }
 
 impl Parse for ExecutionContext {
-  fn parse(input: &ParseBuffer) -> syn::Result<Self> {
+  fn parse(input: &ParseBuffer<'_>) -> syn::Result<Self> {
     if input.is_empty() {
       return Ok(Self::Blocking);
     }

core/tauri-macros/src/context.rs

@@ -18,7 +18,7 @@ pub(crate) struct ContextItems {
 }
 
 impl Parse for ContextItems {
-  fn parse(input: &ParseBuffer) -> syn::parse::Result<Self> {
+  fn parse(input: &ParseBuffer<'_>) -> syn::parse::Result<Self> {
     let config_file = if input.is_empty() {
       std::env::var("CARGO_MANIFEST_DIR").map(|m| PathBuf::from(m).join("tauri.conf.json"))
     } else {

core/tauri-macros/src/lib.rs

@@ -2,7 +2,6 @@
 // SPDX-License-Identifier: Apache-2.0
 // SPDX-License-Identifier: MIT
 
-extern crate proc_macro;
 use crate::context::ContextItems;
 use proc_macro::TokenStream;
 use syn::{parse_macro_input, DeriveInput};

core/tauri-macros/src/runtime.rs

@@ -14,7 +14,7 @@ pub(crate) struct Attributes {
 }
 
 impl Parse for Attributes {
-  fn parse(input: ParseStream) -> syn::Result<Self> {
+  fn parse(input: ParseStream<'_>) -> syn::Result<Self> {
     let default_type = input.parse()?;
     input.parse::<Token![,]>()?;
     Ok(Attributes {