refactor: Upgrade to clap v4

.clippy.toml

@@ -1 +1 @@
-msrv = "1.54.0"  # MSRV
+msrv = "1.60.0"  # MSRV

.github/workflows/ci.yml

@@ -51,15 +51,15 @@ jobs:
     - name: No-default features
       run: cargo test --workspace --no-default-features
   msrv:
-    name: "Check MSRV: 1.54.0"
+    name: "Check MSRV: 1.60.0"
     runs-on: ubuntu-latest
     steps:
     - name: Checkout repository
       uses: actions/checkout@v2
     - name: Install Rust
       uses: actions-rs/toolchain@v1
       with:
-        toolchain: 1.54.0  # MSRV
+        toolchain: 1.60.0  # MSRV
         profile: minimal
         override: true
     - uses: Swatinem/rust-cache@v1
@@ -113,7 +113,7 @@ jobs:
     - name: Install Rust
       uses: actions-rs/toolchain@v1
       with:
-        toolchain: 1.54.0  # MSRV
+        toolchain: 1.60.0  # MSRV
         profile: minimal
         override: true
         components: clippy

.github/workflows/rust-next.yml

@@ -57,9 +57,9 @@ jobs:
     strategy:
       matrix:
         rust:
-        - 1.54.0  # MSRV
+        - 1.60.0  # MSRV
         - stable
-    continue-on-error: ${{ matrix.rust != '1.54.0' }}  # MSRV
+    continue-on-error: ${{ matrix.rust != '1.60.0' }}  # MSRV
     runs-on: ubuntu-latest
     steps:
     - name: Checkout repository

Cargo.toml

@@ -9,7 +9,8 @@ documentation = "https://docs.rs/codegenres"
 readme = "README.md"
 categories = ["development-tools", "text-processing"]
 keywords = ["development", "codegen"]
-edition = "2018"
+edition = "2021"
+rust-version = "1.60.0"  # MSRV
 include = [
   "src/**/*",
   "Cargo.toml",
@@ -32,6 +33,6 @@ default = ["clap"]
 
 [dependencies]
 difference = "2.0.0"
-clap = { version = "3.0", features = ["derive"], optional = true }
+clap = { version = "4.0.0", features = ["std", "derive"], optional = true }
 normalize-line-endings = "0.3.0"
 derive_more = "0.99.2"

src/lib.rs

@@ -32,19 +32,19 @@ use clap::Args;
 /// ```rust
 /// #[derive(clap::Parser)]
 /// struct Args{
-///    #[clap(short('i'), long, parse(from_os_str))]
+///    #[arg(short('i'), long)]
 ///    input: std::path::PathBuf,
-///    #[clap(flatten)]
+///    #[command(flatten)]
 ///    codegen: codegenrs::CodeGenArgs,
 /// }
 /// ```
 #[cfg(feature = "clap")]
 #[derive(Debug, Args)]
 pub struct CodeGenArgs {
-    #[clap(short('o'), long, parse(from_os_str))]
+    #[arg(short('o'), long)]
     output: std::path::PathBuf,
 
-    #[clap(long)]
+    #[arg(long)]
     check: bool,
 }
 
@@ -101,18 +101,18 @@ pub fn write_str(
 /// ```rust
 /// #[derive(clap::Parser)]
 /// struct Args{
-///    #[clap(short('i'), long, parse(from_os_str))]
+///    #[arg(short('i'), long)]
 ///    input: std::path::PathBuf,
-///    #[clap(flatten)]
+///    #[command(flatten)]
 ///    codegen: codegenrs::CodeGenArgs,
-///    #[clap(flatten)]
+///    #[command(flatten)]
 ///    rustfmt: codegenrs::RustfmtArgs,
 /// }
 /// ```
 #[cfg(feature = "clap")]
 #[derive(Debug, Args)]
 pub struct RustfmtArgs {
-    #[clap(long, parse(from_os_str))]
+    #[arg(long)]
     rustfmt_config: Option<std::path::PathBuf>,
 }