`embassy-time`: add release automation using `cargo-release`

this requires you to install [`cargo-release`].
note that this does not include a URL pointing to the diff on GitHub as
is usually done in changelogs since `embassy` is a mono-repo and the GH
UI doesn't offer a commit view per folder (see the [GH feature request]
for this).

[`cargo-release`]: https://crates.io/crates/cargo-release
[GH feature request]: https://github.com/orgs/community/discussions/162131

2 files changed, 7 insertions, 1 deletions

diff --git a/embassy-time/CHANGELOG.md b/embassy-time/CHANGELOG.md
index 49b3b4586..a0c1abe8d 100644
--- a/embassy-time/CHANGELOG.md
+++ b/embassy-time/CHANGELOG.md
@@ -5,7 +5,8 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
-## Unreleased
+<!-- next-header -->
+## Unreleased - ReleaseDate
 
 - Allow inlining on time driver boundary
 - Add `saturating_add` and `saturating_sub` to `Instant`
diff --git a/embassy-time/release.toml b/embassy-time/release.toml
new file mode 100644
index 000000000..fb6feaf21
--- /dev/null
+++ b/embassy-time/release.toml
@@ -0,0 +1,5 @@
+pre-release-replacements = [
+    {file="CHANGELOG.md", search="Unreleased", replace="{{version}}", min=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},
+]