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Specbee: Things you need for a Drupal 8 to Drupal 9 Upgrade – A Checklist
Chaitanya R Dessai
29 Nov, 2022
Since Drupal 8, upgrades to the subsequent versions are meant to be way easier than in the past. And by all accounts, that’s been accomplished! Even though Drupal 8 to Drupal 9 is a major release and upgrade, it almost feels like a minor release upgrade. There’s no rebuild that needs to be done when updating from Drupal 8.9 to Drupal 9.0 because they are almost the same. Only deprecated code should be removed and dependency libraries (Symfony, PHP, etc.) should be upgraded to the latest version.
If you’re looking for a quick, no-frills checklist article to guide you through your Drupal 8 to Drupal 9 upgrade, you have arrived just at the right place. Take a look!
Tools you will need for an effective upgrade
- Upgrade Status: Install tools like Upgrade Status will give you a list of modules and themes that need to be worked on or are up-to-date.
- Drupal-Check: This one’s a very useful analysis tool that checks for the correctness of classes and reports errors found in deprecated core or contributed modules.
- Upgrade Rector: Install the Upgrade Rector modules as it helps in fixing deprecation errors for the modules installed. It provides code fix suggestions and makes it easy to generate patches for them.
A Compatible Hosting Environment
Now here’s what you need for a compatible hosting environment to welcome your brand new Drupal 9 site:
- Apache version must be 2.4.7
- Php version should be 7.4 or 8
- MySQL version should be 5.7.8+
Using the Upgrade Status Module
Using the Upgrade status module, you can find out what changes you need to make to make your website compatible with Drupal 9.
Go to Admin -> Reports -> Upgrade status. Now select the modules/themes and click on the Scan selected button.
Checklist for a Quick Drupal 8 to 9 Upgrade
- Make sure the current core version of your website is updated. It should be 8.8.x or 8.9.x.
- Document the libraries and themes installed on the website. List all the contributed and custom themes that are installed on the website.
- Document contributed and custom modules installed on the website. The Upgrade Status module can assist in identifying the modules. This module inspects the website, gives information about the modules compatible with Drupal 9, and suggests updating them to the latest version if any of them have been released. Upgrade Status also suggests removing modules that have been disabled.
- Identify deprecated code. The Drupal-check module can be used to identify the deprecations for modules and themes.
- Update the contributed modules. Update contributed modules to the latest compatible version of Drupal 9.
- Update the custom modules. You will need to manually update the code to make custom modules compatible with Drupal 9. Add the core version requirement key in info.yml file.
- Update the contributed themes. Update contributed themes to the latest compatible version of Drupal 9.
- Update the custom themes. To make custom themes compatible with Drupal 9, any deprecation code needs to be removed/updated. Add the core version requirement key in info.yml file.
- Make sure that the libraries are compatible with Drupal 9. For example, if your website is using the jquery timepicker library then it should be upgraded to the latest version which is 1.14.0 in the composer.json file.
- Make sure that the unused modules are uninstalled. Remove unused modules using composer.
- Update the core codebase to Drupal 9. Once all the modules, themes and libraries are compatible with Drupal 9, add drupal/core-composer-scaffold, drupal/core-recommended specifying the Drupal version in composer.json and run the composer update.
"drupal/core-composer-scaffold" : "^9.2" ,
"drupal/core-recommended" : "^9.2" ,
Final Thoughts
And that’s it! You have successfully upgraded your Drupal 8 website to Drupal 9. Wasn’t that easy? If you’re looking for further assistance with your Drupal site, talk to our Drupal experts today.
Keep DB schema clean and consistent between branches
How to verify Mastodon users with cryptography
Use open source GPG key pairs and Keyoxide to prove your identity on Mastodon. Read More at Enable Sysadmin
The post How to verify Mastodon users with cryptography appeared first on Linux.com.
Andy Wingo: are ephemerons primitive?
Good evening 🙂 A quick note, tonight: I’ve long thought that
ephemerons
are primitive and can’t be implemented with mark functions and/or
finalizers, but today I think I have a counterexample.
For context, one of the goals of the GC implementation I have been
working on on is to replace
Guile‘s current use of the Boehm-Demers-Weiser (BDW) conservative
collector. Of course, changing a
garbage collector for a production language runtime is risky, and for Guile one of the mitigation
strategies for this work is that the new collector is behind an abstract API
whose implementation can be chosen at compile-time, without requiring
changes to user code. That way we can first switch to
BDW-implementing-the-new-GC-API, then switch the implementation behind
that API to something else.
Abstracting GC is a tricky problem to get right, and I thank the MMTk
project for showing that this is possible — you
have user-facing APIs that need to be implemented by concrete collectors,
but also extension points so that the user can provide some compile-time
configuration too, for example to provide field-tracing visitors that take into account how a user wants to lay out objects.
Anyway. As we discussed last time, ephemerons are usually have explicit
support from the GC, so we need an ephemeron abstraction as part of the
abstract GC API. The question is, can BDW-GC provide an implementation of
this API?
I think the answer is “yes, but it’s very gnarly and will kill
performance so bad that you won’t want to do it.”
the contenders
Consider that the primitives that you get with BDW-GC are custom mark
functions, run on objects when they are found to be live by the mark
workers; disappearing links, a kind of weak reference; and finalizers, which receive the object being finalized, can allocate, and indeed can resurrect the object.
BDW-GC’s finalizers are a powerful
primitive, but not one that is useful for implementing the “conjunction”
aspect of ephemerons, as they cannot constrain the marker’s idea of
graph connectivity: a finalizer can only prolong the life of an object subgraph,
not cut it short. So let’s put finalizers aside.
Weak references have a tantalizingly close kind of conjunction property:
if the weak reference itself is alive, and the referent is also
otherwise reachable, then the weak reference can be dereferenced.
However this primitive only involves the two objects E and K; there’s no
way to then condition traceability of a third object V to E and K.
We are left with mark functions. These are an extraordinarily powerful
interface in BDW-GC, but somewhat expensive also: not inlined, and going
against the grain of what BDW-GC is really about (heaps in which the
majority of all references are conservative). But, OK. They way they
work is, your program allocates a number of GC “kinds”, and associates
mark functions with those kinds. Then when you allocate objects, you
use those kinds. BDW-GC will call your mark functions when tracing an object of those kinds.
Let’s assume firstly that you have a kind for ephemerons; then when you
go to mark an ephemeron E, you mark the value V only if the key K has
been marked. Problem solved, right? Only halfway: you also have to
handle the case in which E is marked first, then K. So you publish E to
a global hash table, and… well. You would mark V when you mark a K for
which there is a published E. But, for that you need a hook into
marking V, and V can be any object…
So now we assume additionally that all objects are allocated with
user-provided custom mark functions, and that all mark functions check
if the marked object is in the published table of pending ephemerons,
and if so marks values. This is essentially what a proper ephemeron
implementation would do, though there are some optimizations one can do
to avoid checking the table for each object before the mark stack runs
empty for the first time. In this case, yes you can do it!
Additionally if you register disappearing links for the K field in each
E, you can know if an ephemeron E was marked dead in a previous
collection. Add a pre-mark hook (something BDW-GC provides) to clear
the pending ephemeron table, and you are in business.
yes, but no
So, it is possible to implement ephemerons with just custom mark
functions. I wouldn’t want to do it, though: missing the
mostly-avoid-pending-ephemeron-check optimization would be devastating,
and really what you want is support in the GC implementation. I think
that for the BDW-GC implementation in
whippet I’ll just implement
weak-key associations, in which the value is always marked strongly
unless the key was dead on a previous collection, using disappearing
links on the key field. That way a (possibly indirect) reference from a
value V to a key K can indeed keep K alive, but oh well: it’s a
conservative approximation of what should happen, and not worse than
what Guile has currently.
Good night and happy hacking!
Introducing WebStorm 2022.3!
We’ve just released WebStorm 2022.3, the third major update of the year for our JavaScript IDE. We hope that the new functionality, along with the other enhancements we’ve added to it, will make your coding experience with WebStorm more productive and enjoyable.
Here are the highlights:
- Updated new project templates
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- Updates for Vue
- Angular type narrowing and fixes
- Code Vision for JavaScript and TypeScript
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- Improvements for Docker
Visit our website to learn more and start using WebStorm 2022.3 today.
Ubuntu Touch OTA-24 released for Ubuntu Phone users
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