refactor: Split out env_filter package

Fixes #193

Cargo.toml

@@ -1,5 +1,6 @@
 [workspace]
 resolver = "2"
+members = ["crates/*"]
 
 [workspace.package]
 license = "MIT OR Apache-2.0"
@@ -50,11 +51,11 @@ default = ["auto-color", "humantime", "regex"]
 color = ["dep:anstream", "dep:anstyle"]
 auto-color = ["color", "anstream/auto"]
 humantime = ["dep:humantime"]
-regex = ["dep:regex"]
+regex = ["env_filter/regex"]
 
 [dependencies]
 log = { version = "0.4.8", features = ["std"] }
-regex = { version = "1.0.3", optional = true, default-features=false, features=["std", "perf"] }
+env_filter = { version = "0.1.0", path = "crates/env_filter", default-features = false }
 humantime = { version = "2.0.0", optional = true }
 anstream = { version = "0.6.11", default-features = false, features = ["wincon"], optional = true }
 anstyle = { version = "1.0.4", optional = true }

crates/env_filter/CHANGELOG.md

@@ -0,0 +1,11 @@
+# Change Log
+All notable changes to this project will be documented in this file.
+
+The format is based on [Keep a Changelog](http://keepachangelog.com/)
+and this project adheres to [Semantic Versioning](http://semver.org/).
+
+<!-- next-header -->
+## [Unreleased] - ReleaseDate
+
+<!-- next-url -->
+[Unreleased]: https://github.com/rust-cli/env_logger/compare/b4a2c304c16d1db4a2998f24c00e00c0f776113b...HEAD

crates/env_filter/Cargo.toml

@@ -0,0 +1,34 @@
+[package]
+name = "env_filter"
+version = "0.1.0"
+description = """
+Filter log events using environment variables
+"""
+repository = "https://github.com/rust-cli/env_logger"
+categories = ["development-tools::debugging"]
+keywords = ["logging", "log", "logger"]
+license.workspace = true
+edition.workspace = true
+rust-version.workspace = true
+include.workspace = true
+
+[package.metadata.docs.rs]
+all-features = true
+rustdoc-args = ["--cfg", "docsrs"]
+
+[package.metadata.release]
+pre-release-replacements = [
+  {file="CHANGELOG.md", search="Unreleased", replace="{{version}}", min=1},
+  {file="CHANGELOG.md", search="\\.\\.\\.HEAD", replace="...{{tag_name}}", exactly=1},
+  {file="CHANGELOG.md", search="ReleaseDate", replace="{{date}}", min=1},
+  {file="CHANGELOG.md", search="<!-- next-header -->", replace="<!-- next-header -->\n## [Unreleased] - ReleaseDate\n", exactly=1},
+  {file="CHANGELOG.md", search="<!-- next-url -->", replace="<!-- next-url -->\n[Unreleased]: https://github.com/rust-cli/env_logger/compare/{{tag_name}}...HEAD", exactly=1},
+]
+
+[features]
+default = ["regex"]
+regex = ["dep:regex"]
+
+[dependencies]
+log = { version = "0.4.8", features = ["std"] }
+regex = { version = "1.0.3", optional = true, default-features=false, features=["std", "perf"] }

crates/env_filter/LICENSE-APACHE

@@ -0,0 +1 @@
+../../LICENSE-APACHE

crates/env_filter/LICENSE-MIT

@@ -0,0 +1 @@
+../../LICENSE-MIT

crates/env_filter/README.md

@@ -0,0 +1,6 @@
+# env_filter
+
+[![crates.io](https://img.shields.io/crates/v/env_filter.svg)](https://crates.io/crates/env_filter)
+[![Documentation](https://docs.rs/env_filter/badge.svg)](https://docs.rs/env_filter)
+
+> Filter log events using environment variables

src/filter/mod.rs → crates/env_filter/src/lib.rs

@@ -1,21 +1,17 @@
 //! Filtering for log records.
 //!
-//! This module contains the log filtering used by `env_logger` to match records.
-//! You can use the `Filter` type in your own logger implementation to use the same
-//! filter parsing and matching as `env_logger`. For more details about the format
-//! for directive strings see [Enabling Logging].
+//! You can use the [`Filter`] type in your own logger implementation to use the same
+//! filter parsing and matching as `env_logger`.
 //!
-//! ## Using `env_logger` in your own logger
+//! ## Using `env_filter` in your own logger
 //!
-//! You can use `env_logger`'s filtering functionality with your own logger.
+//! You can use `env_filter`'s filtering functionality with your own logger.
 //! Call [`Builder::parse`] to parse directives from a string when constructing
 //! your logger. Call [`Filter::matches`] to check whether a record should be
 //! logged based on the parsed filters when log records are received.
 //!
 //! ```
-//! extern crate log;
-//! extern crate env_logger;
-//! use env_logger::filter::Filter;
+//! use env_filter::Filter;
 //! use log::{Log, Metadata, Record};
 //!
 //! struct MyLogger {
@@ -24,7 +20,7 @@
 //!
 //! impl MyLogger {
 //!     fn new() -> MyLogger {
-//!         use env_logger::filter::Builder;
+//!         use env_filter::Builder;
 //!         let mut builder = Builder::new();
 //!
 //!         // Parse a directives string from an environment variable
@@ -53,10 +49,6 @@
 //!     fn flush(&self) {}
 //! }
 //! ```
-//!
-//! [Enabling Logging]: ../index.html#enabling-logging
-//! [`Builder::parse`]: struct.Builder.html#method.parse
-//! [`Filter::matches`]: struct.Filter.html#method.matches
 
 use log::{Level, LevelFilter, Metadata, Record};
 use std::env;
@@ -79,9 +71,8 @@ mod inner;
 /// ## Example
 ///
 /// ```
-/// # #[macro_use] extern crate log;
 /// # use std::env;
-/// use env_logger::filter::Builder;
+/// use env_filter::Builder;
 ///
 /// let mut builder = Builder::new();
 ///
@@ -92,8 +83,6 @@ mod inner;
 ///
 /// let filter = builder.build();
 /// ```
-///
-/// [`Filter`]: struct.Filter.html
 pub struct Builder {
     directives: Vec<Directive>,
     filter: Option<inner::Filter>,
@@ -248,7 +237,7 @@ impl Filter {
     ///
     /// ```rust
     /// use log::LevelFilter;
-    /// use env_logger::filter::Builder;
+    /// use env_filter::Builder;
     ///
     /// let mut builder = Builder::new();
     /// builder.filter(Some("module1"), LevelFilter::Info);

src/filter/regex.rs → crates/env_filter/src/regex.rs

@@ -1,8 +1,6 @@
-extern crate regex;
-
 use std::fmt;
 
-use self::regex::Regex;
+use regex::Regex;
 
 #[derive(Debug)]
 pub struct Filter {

src/lib.rs

@@ -277,7 +277,8 @@
 
 mod logger;
 
-pub mod filter;
+#[doc(inline)]
+pub use ::env_filter as filter;
 pub mod fmt;
 
 pub use self::fmt::{Target, TimestampPrecision, WriteStyle};