refactor(lib)!: move changelog module to git-cliff-core

This will reduce the number of pulled dependencies if you want to
use git-cliff as a library in your Rust project.

Cargo.lock

@@ -486,6 +486,7 @@ dependencies = [
  "glob",
  "indexmap",
  "lazy-regex",
+ "log",
  "pretty_assertions",
  "regex",
  "rust-embed",

Cargo.toml

@@ -1,12 +1,10 @@
 [workspace]
-members = [
-    "git-cliff-core",
-    "git-cliff",
-]
+members = ["git-cliff-core", "git-cliff"]
 
 [workspace.dependencies]
 regex = "1.6.0"
 glob = "0.3.0"
+log = "0.4.17"
 
 [profile.dev]
 opt-level = 0

git-cliff-core/Cargo.toml

@@ -13,6 +13,7 @@ rust-version = "1.60.0"
 [dependencies]
 glob.workspace = true
 regex.workspace = true
+log.workspace = true
 thiserror = "1.0.38"
 serde = { version = "1.0.152", features = ["derive"] }
 serde_json = "1.0.91"

git-cliff-core/src/changelog.rs

@@ -1,11 +1,11 @@
-use git_cliff_core::commit::Commit;
-use git_cliff_core::config::Config;
-use git_cliff_core::error::Result;
-use git_cliff_core::release::{
+use crate::commit::Commit;
+use crate::config::Config;
+use crate::error::Result;
+use crate::release::{
 	Release,
 	Releases,
 };
-use git_cliff_core::template::Template;
+use crate::template::Template;
 use std::io::Write;
 
 /// Changelog generator.
@@ -176,7 +176,7 @@ impl<'a> Changelog<'a> {
 #[cfg(test)]
 mod test {
 	use super::*;
-	use git_cliff_core::config::{
+	use crate::config::{
 		ChangelogConfig,
 		CommitParser,
 		CommitPreprocessor,

git-cliff-core/src/lib.rs

@@ -1,6 +1,8 @@
 //! A highly customizable changelog generator
 #![warn(missing_docs, clippy::unwrap_used)]
 
+/// Changelog generator.
+pub mod changelog;
 /// Command runner.
 pub mod command;
 /// Git commit.
@@ -18,5 +20,8 @@ pub mod repo;
 /// Template engine.
 pub mod template;
 
+#[macro_use]
+extern crate log;
+
 /// Default configuration file.
 pub const DEFAULT_CONFIG: &str = "cliff.toml";

git-cliff/Cargo.toml

@@ -28,8 +28,8 @@ default = ["update-informer"]
 [dependencies]
 glob.workspace = true
 regex.workspace = true
+log.workspace = true
 pretty_env_logger = "0.4.0"
-log = "0.4.17"
 dirs-next = "2.0.0"
 clap_complete = "4.1.1"
 clap_mangen = "0.2.7"

git-cliff/src/lib.rs

@@ -1,7 +1,5 @@
 /// Command-line argument parser.
 pub mod args;
-/// Changelog generator.
-pub mod changelog;
 
 #[macro_use]
 extern crate log;
@@ -11,8 +9,8 @@ use args::{
 	Sort,
 	Strip,
 };
-use changelog::Changelog;
 use clap::ValueEnum;
+use git_cliff_core::changelog::Changelog;
 use git_cliff_core::commit::Commit;
 use git_cliff_core::config::Config;
 use git_cliff_core::embed::EmbeddedConfig;