fix(fmt): Improve terminal styling support

.clippy.toml

@@ -1,4 +1,4 @@
-msrv = "1.60.0"  # MSRV
+msrv = "1.71"  # MSRV
 warn-on-all-wildcard-imports = true
 disallowed-methods = [
     { path = "std::option::Option::map_or", reason = "prefer `map(..).unwrap_or(..)` for legibility" },

.github/workflows/ci.yml

@@ -48,15 +48,15 @@ jobs:
     - name: Run crate example
       run: cargo run --example default
   msrv:
-    name: "Check MSRV: 1.60.0"
+    name: "Check MSRV: 1.71"
     runs-on: ubuntu-latest
     steps:
     - name: Checkout repository
       uses: actions/checkout@v4
     - name: Install Rust
       uses: dtolnay/rust-toolchain@stable
       with:
-        toolchain: "1.60"  # MSRV
+        toolchain: "1.71"  # MSRV
     - uses: Swatinem/rust-cache@v2
     - uses: taiki-e/install-action@cargo-hack
     - name: Check
@@ -115,7 +115,7 @@ jobs:
     - name: Install Rust
       uses: dtolnay/rust-toolchain@stable
       with:
-        toolchain: "1.60"  # MSRV
+        toolchain: "1.71"  # MSRV
         components: clippy
     - uses: Swatinem/rust-cache@v2
     - name: Install SARIF tools

Cargo.toml

@@ -10,7 +10,7 @@ categories = ["development-tools::debugging"]
 keywords = ["logging", "log", "logger"]
 license = "MIT OR Apache-2.0"
 edition = "2021"
-rust-version = "1.60.0"  # MSRV
+rust-version = "1.71"  # MSRV
 include = [
   "build.rs",
   "src/**/*",
@@ -38,17 +38,17 @@ pre-release-replacements = [
 
 [features]
 default = ["auto-color", "humantime", "regex"]
-color = ["dep:termcolor"]
-auto-color = ["dep:is-terminal", "color"]
+color = ["dep:anstream", "dep:anstyle"]
+auto-color = ["color", "anstream/auto"]
 humantime = ["dep:humantime"]
 regex = ["dep:regex"]
 
 [dependencies]
 log = { version = "0.4.8", features = ["std"] }
 regex = { version = "1.0.3", optional = true, default-features=false, features=["std", "perf"] }
-termcolor = { version = "1.1.1", optional = true }
 humantime = { version = "2.0.0", optional = true }
-is-terminal = { version = "0.4.0", optional = true }
+anstream = { version = "0.6.11", default-features = false, features = ["wincon"], optional = true }
+anstyle = { version = "1.0.4", optional = true }
 
 [[test]]
 name = "regexp_filter"

examples/custom_format.rs

@@ -19,7 +19,7 @@ If you want to control the logging output completely, see the `custom_logger` ex
 
 #[cfg(all(feature = "color", feature = "humantime"))]
 fn main() {
-    use env_logger::{fmt::Color, Builder, Env};
+    use env_logger::{Builder, Env};
 
     use std::io::Write;
 
@@ -30,16 +30,17 @@ fn main() {
 
         Builder::from_env(env)
             .format(|buf, record| {
-                let mut style = buf.style();
-                style.set_bg(Color::Yellow).set_bold(true);
-
+                // We are reusing `anstyle` but there are `anstyle-*` crates to adapt it to your
+                // preferred styling crate.
+                let warn_style = buf.default_level_style(log::Level::Warn);
+                let reset = warn_style.render_reset();
+                let warn_style = warn_style.render();
                 let timestamp = buf.timestamp();
 
                 writeln!(
                     buf,
-                    "My formatted log ({}): {}",
-                    timestamp,
-                    style.value(record.args())
+                    "My formatted log ({timestamp}): {warn_style}{}{reset}",
+                    record.args()
                 )
             })
             .init();