fix: use committer timestamp for commit_duration_days calculation

Signed-off-by: Shingo OKAWA <shingo.okawa.g.h.c@gmail.com>

Author: ognis1205

git-cliff-core/src/commit.rs

@@ -123,8 +123,6 @@ impl Range {
 pub struct Commit<'a> {
 	/// Commit ID.
 	pub id:            String,
-	/// Timestamp of the commit in seconds, from epoch.
-	pub timestamp:     i64,
 	/// Commit message including title, description and summary.
 	pub message:       String,
 	/// Conventional commit.
@@ -202,7 +200,6 @@ impl From<&GitCommit<'_>> for Commit<'_> {
 	fn from(commit: &GitCommit<'_>) -> Self {
 		Commit {
 			id: commit.id().to_string(),
-			timestamp: commit.time().seconds(),
 			message: commit.message().unwrap_or_default().trim_end().to_string(),
 			author: commit.author().into(),
 			committer: commit.committer().into(),
@@ -467,7 +464,6 @@ impl Serialize for Commit<'_> {
 
 		let mut commit = serializer.serialize_struct("Commit", 20)?;
 		commit.serialize_field("id", &self.id)?;
-		commit.serialize_field("timestamp", &self.timestamp)?;
 		if let Some(conv) = &self.conv {
 			commit.serialize_field("message", conv.description())?;
 			commit.serialize_field("body", &conv.body())?;

git-cliff-core/src/release.rs

@@ -147,12 +147,12 @@ impl Release<'_> {
 		} else {
 			self.commits
 				.iter()
-				.min_by_key(|c| c.timestamp)
-				.zip(self.commits.iter().max_by_key(|c| c.timestamp))
+				.min_by_key(|c| c.committer.timestamp)
+				.zip(self.commits.iter().max_by_key(|c| c.committer.timestamp))
 				.and_then(|(first, last)| {
-					Utc.timestamp_opt(first.timestamp, 0)
+					Utc.timestamp_opt(first.committer.timestamp, 0)
 						.single()
-						.zip(Utc.timestamp_opt(last.timestamp, 0).single())
+						.zip(Utc.timestamp_opt(last.committer.timestamp, 0).single())
 						.map(|(start, end)| {
 							(end.date_naive() - start.date_naive()).num_days() as i32
 						})