The `auto-changelog.js` script has been refactoring into various
different modules. This was done in preparation for migrating this to
a separate repository, where it can be used in our libraries as well.
Functionally this should act _mostly_ the same way, but there have been
some changes. It was difficult to make this a pure refactor because of
the strategy used to validate the changelog and ensure each addition
remained valid. Instead of being updated in-place, the changelog is now
parsed upfront and stored as a "Changelog" instance, which is a new
class that was written to allow only valid changes. The new changelog
is then stringified and completely overwrites the old one.
The parsing had to be much more strict, as any unanticipated content
would otherwise be erased unintentionally. This script now also
normalizes the formatting of the changelog (though the individual
change descriptions are still unformatted).
The changelog stringification now accommodates non-linear releases as
well. For example, you can now release v1.0.1 *after* v2.0.0, and it
will be listed in chronological order while also correctly constructing
the `compare` URLs for each release.
The changelog script now accepts an `--rc` flag to tell it whether to
add new changes to `Unreleased` or to the header for the current
version.
Previously this was inferred from whether the current version matched
the most recent tag. However this method only works for the first
update. Using a flag simplifies this logic, and makes it possible to
manually re-run this for further updates to a release candidate.
Each changelog release now has category headers. The standard "keep a
changelog" [1] categories are used, along with the addition of
"Uncategorized" for any changes that have not yet been categorized.
The changelog script has been updated to add this "Uncategorized"
header if it isn't already present, and to place any new commits under
this header.
The changelog has been updated to property categorize each change in
recent releases, and to place changes in older releases under the
header "Uncategorized".
[1]: https://keepachangelog.com/en/1.0.0/
Each release header now includes a link to the range of commits
included with that release. These links are at the end of the document,
in accordance with the "keep a changelog" [1] format.
For the purpose of this changelog, the "previous release" is the most
recent release mentioned in the changelogs. The diffs ignore any
releases that were omitted from the changelog. This is mainly an issue
with older releases, so it seemed acceptable. All releases have been
documented for a couple of years now, and will be going forward as
well.
The name of the "Current Develop Branch" section was changed to
"Unreleased" to confirm with "keep a changelog".
The `auto-changelog.js` script has been updated to update/add these
links whenever adding a new release header as well.
[1]: https://keepachangelog.com/en/1.0.0/
The changelog release header format has been updated to match the "keep
a changelog" [1] format. Each header is now the bracketed version
number followed by a dash, then the release date in ISO-8601 format.
The release dates in each header were also updated to match the date of
the corresponding GitHub Release [2]. Many of these dates were
incorrect because they were set on the day we created the release
candidate, rather than on the day of release.
Any changelog release entries without a corresponding GitHub release
was left with the date already specified.
The three oldest release headers were missing dates. For the first two,
I used the date of the version bump commit. For the third, I removed it
since no changes were listed anyway, and it represented a range of
releases rather than a single one.
The `auto-changelog.js` script has been updated to account for this new
format as well.
[1]: https://keepachangelog.com/en/1.0.0/
[2]: https://github.com/MetaMask/metamask-extension/releases
The changelog update script now prevents duplicate entries from being
added. Specifically, it will ensure that if a PR has been referenced
already in an entry, it will not add it again.
This should prevent it from adding duplicate entries for changes that
were cherry-picked into hotfix releases.
Note that this duplication prevention only works for entries containing
a PR number. We don't have any way to prevent duplicate entries yet in
cases where we don't know the associated PR. We will be preventing this
possibility entirely pretty soon in some upcoming release automation
changes though, so I'm not concerned about this omission.
Instead of always placing new changelog entries under the "Current
Develop Branch" header, the changelog script now places them under the
header for the current release if that release has not yet been tagged.
This eliminates one manual step from the release process.
Relates to #10752
Mark Stacey