Kovid has agreed to publish "preview" versions of calibre on Fridays when there isn't an official release. The first preview is there, at
https://download.calibre-ebook.com/preview/.
Notes:
- Making the previews isn't completely automatic so he might forget or feel the changes since the last release/preview don't justify the time. For example, changes to news sources are automatically downloaded so don't require a release.
- He might publish a preview on some other day if he considers having it available for testing worth the work.
- The third part of the preview's version number will be greater than or equal to 100, as in 7.6.100. No calibre standard or point release will have a version number that large.
- There isn't a change log. See the calibre commits on github to see what is in the preview. The preview version number commit will be visible in the list of commits. All changes before that commit are included in the preview. Previews are cumulative; they contain all the logged changes since the previous regular release, visible in the log with a version number less than 100. Note: the first preview (09-Mar-2024 09:07) doesn't have this commit.
- These previews contain changes that will be in the next release. The changes aren't considered risky or they wouldn't be queued for release.
- If you are concerned about overwriting your calibre install, the portable version is in the preview folder.
- There shouldn't be any problem with reinstalling a previous version. If you are concerned then use the portable version.
- If you report problems then it is very important that you tell us if you are running a preview, and if so which version.