refactor(changelog): use timestamp for release dates

Signed-off-by: orhun <orhunparmaksiz@gmail.com>

Cargo.lock

@@ -317,7 +317,6 @@ dependencies = [
 name = "gitolith-cli"
 version = "0.1.0"
 dependencies = [
- "chrono",
  "gitolith-core",
  "log",
  "pretty_env_logger",

gitolith-cli/Cargo.toml

@@ -16,7 +16,6 @@ edition = "2018"
 gitolith-core = { path = "../gitolith-core" }
 pretty_env_logger = "0.4.0"
 log = "0.4.14"
-chrono = "0.4.19"
 
 [dependencies.structopt]
 version = "0.3"

gitolith-cli/src/main.rs

@@ -1,11 +1,6 @@
 mod args;
 
 use args::Opt;
-use chrono::{
-	DateTime,
-	NaiveDateTime,
-	Utc,
-};
 use gitolith_core::changelog::Changelog;
 use gitolith_core::commit::Commit;
 use gitolith_core::config::Config;
@@ -50,14 +45,8 @@ fn main() -> Result<()> {
 		if let Some(tag) = tags.get(&commit_id) {
 			release_root.releases[release_index].version = Some(tag.to_string());
 			release_root.releases[release_index].commit_id = Some(commit_id);
-			release_root.releases[release_index].date = Some(
-				DateTime::<Utc>::from_utc(
-					NaiveDateTime::from_timestamp(git_commit.time().seconds(), 0),
-					Utc,
-				)
-				.format(&config.changelog.date_format)
-				.to_string(),
-			);
+			release_root.releases[release_index].timestamp =
+				git_commit.time().seconds();
 			release_index += 1;
 		}
 	}

gitolith-core/src/config.rs

@@ -29,7 +29,6 @@ pub struct ChangelogConfig {
 	pub group_parsers: Vec<GroupParser>,
 	pub filter_group:  bool,
 	pub tag_pattern:   String,
-	pub date_format:   String,
 }
 
 /// Parser for grouping commits.

gitolith-core/src/release.rs

@@ -29,5 +29,5 @@ pub struct Release<'a> {
 	pub commits:   Vec<Commit<'a>>,
 	#[serde(rename = "commit_id")]
 	pub commit_id: Option<String>,
-	pub date:      Option<String>,
+	pub timestamp: i64,
 }

gitolith.toml

@@ -11,7 +11,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 # template for the changelog body
 # https://tera.netlify.app/docs/#introduction
 body = """
-## {% if version %}[{{ version }}] - {{ date }}{% else %}[unreleased]{% endif %}
+## {% if version %}[{{ version }}] - {{ timestamp | date(format="%Y-%m-%d") }}{% else %}[unreleased]{% endif %}
 {% for group, commits in commits | group_by(attribute="group") %}
 ### {{ group | capitalize}}
 {% for commit in commits %}
@@ -34,6 +34,3 @@ filter_group = false
 
 # glob pattern for matching tags
 tag_pattern = "v[0-9]*"
-
-# https://docs.rs/chrono/latest/chrono/format/strftime/index.html
-date_format = "%Y-%m-%d"