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#legacyCode #remote #conference
@pbourgau is starting the game with a live refactoring of Legacy Code with "Golden Master" and the @mikadomethod https://abs.twimg.com/emoji/v2/... draggable="false" alt="💪" title="Flexed biceps" aria-label="Emoji: Flexed biceps">
"Golden Master" takeaways:

- enforces to distinct refactoring and new features
- don& #39;t push them in your CI
- they& #39;re here to help you refactor
The @mikadomethod helps you not getting lost when you& #39;re working with Legacy Code.

It& #39;s a recipe you can follow to get your way out.

Now @pbourgau is about to show a live demo of it https://abs.twimg.com/emoji/v2/... draggable="false" alt="⛳" title="Flag in hole" aria-label="Emoji: Flag in hole">
Philippe uses https://coggle.it/ ">https://coggle.it/">... to build his Mikado map.

It seems simple and powerful https://abs.twimg.com/emoji/v2/... draggable="false" alt="👌" title="Ok hand" aria-label="Emoji: Ok hand">
"The Parking technique"

A place to put things you think you could improve w/ the code, but that are not related to your current goal

Helps you stay focus and get things out of your head
Things are starting to get crossed off the list.

We& #39;re getting out of the tunnel!

Also: commit frequently https://abs.twimg.com/emoji/v2/... draggable="false" alt="😉" title="Winking face" aria-label="Emoji: Winking face">
Key takeaways from the Mikado Method:

- you can cut refactoring in parts small enough so you don& #39;t need to ask permission
- you can share the graph with others
Next up is @afilina https://abs.twimg.com/emoji/v2/... draggable="false" alt="🎙" title="Studio microphone" aria-label="Emoji: Studio microphone">

She& #39;ll share her amazing expertise in working with very old Legacy codebases!

#legacyCode
Beware the full rewrite.

It& #39;s a trap.
"Let& #39;s rewrite this old Legacy system!"

Pick 10 new technologies to try out on the new system

Fail because of too many moving parts https://abs.twimg.com/emoji/v2/... draggable="false" alt="☠" title="Skull and crossbones" aria-label="Emoji: Skull and crossbones">

https://abs.twimg.com/emoji/v2/... draggable="false" alt="💡" title="Electric light bulb" aria-label="Emoji: Electric light bulb"> Don& #39;t try too many things at once
2 useful tools to work with Legacy PHP codebases:

- PHP CodeSniffer https://github.com/squizlabs/PHP_CodeSniffer
-">https://github.com/squizlabs... Rector https://github.com/rectorphp/rector">https://github.com/rectorphp...
rectorphp/rector

Instant Upgrades and Instant Refactoring of any PHP 5.3+ code - rectorphp/rector

https://github.com/squizlabs/PHP_CodeSniffer
A more sustainable approach to migrate a codebase: a *progressive* rewrite

Don& #39;t freeze developments

Do this by module

The URL is an interface which can be implemented by different applications (modules)
Refactor code when you need to change it

@martinfowler "Refactoring" book is a gold mine: https://martinfowler.com/books/refactoring.html">https://martinfowler.com/books/ref...
Unused endpoints are dead code. It slows you down.

Spot abandoned code and get rid of it.
Remote conferences have their own set of challenges.

Currently dealing with technical issues so we can get @ToF_ started https://abs.twimg.com/emoji/v2/... draggable="false" alt="😅" title="Smiling face with open mouth and cold sweat" aria-label="Emoji: Smiling face with open mouth and cold sweat">

Thanks @adibolb is on it!

#legacyOfSocrates
And we& #39;re back!

@ToF_ is now speaking: "Stop managing technical debt and start solving problems again"

Let& #39;s focus on the end-users a bit https://abs.twimg.com/emoji/v2/... draggable="false" alt="❤️" title="Red heart" aria-label="Emoji: Red heart">

#legacyOfSocrates
It& #39;s an worthy exercise to deconstruct the heuristics, context and objectives behind a conflict

#legacyOfSocrates
"Why did they put the POC in production?"

Well, that& #39;s a typical conflict of objectives

#legacyOfSocrates
Align your state of the art

Bring all people together, give & #39;em post-its and discover the hidden conflicts

#legacyOfSocrates
Great books to read https://abs.twimg.com/emoji/v2/... draggable="false" alt="👌" title="Ok hand" aria-label="Emoji: Ok hand">

#legacyOfSocrates
Our next great speaker is @alexboly

He& #39;ll present a way to refactor Legacy Code using pure functions https://abs.twimg.com/emoji/v2/... draggable="false" alt="🎩" title="Top hat" aria-label="Emoji: Top hat">

#legacyOfSocrates
Slides are available here:  https://www.slideshare.net/alexboly/refactor-legacy-code-through-pure-functions

https://www.slideshare.net/alexboly/... href="https://twtext.com//hashtag/legacyOfSocrates"> #legacyOfSocrates
Alex is mentioning the Strangler Pattern

As a reminder, @w3ltraumpirat did a great talk on this in the last edition: https://www.youtube.com/watch?v=jm_ZBc5z6B0">https://www.youtube.com/watch...
Alex& #39;s approach follows 3 steps:

1. Refactor code to pure functions
2. Write data-driven or property-based tests on the pure functions
3. Refactor pure functions to classes (or something else)

#legacyOfSocrates
It& #39;s nice when functions are boring

When you go back home, you don& #39;t expect side-effects when you turn the lights on https://abs.twimg.com/emoji/v2/... draggable="false" alt="💡" title="Electric light bulb" aria-label="Emoji: Electric light bulb">

#legacyOfSocrates
"Any program can be used as a combination of pure functions & I/O functions"

Yes!

Domain vs. Infra => keep them separated

#legacyOfSocrates
Finally, @WoodyZuill is talking about #MobProgramming and how that can help you work with Legacy Code

Which is, to be honest, most of the code we need to work with https://abs.twimg.com/emoji/v2/... draggable="false" alt="😉" title="Winking face" aria-label="Emoji: Winking face">

#legacyOfSocrates
Optimize for the flow of the work, not individual outputs

That& #39;s a mindset shift

#legacyOfSocrates
"The driver is a smart input device" to the computer

Like, a smart keyboard

The rest of the team thinks, navigates

#legacyOfSocrates
Navigators share the cognitive load

You can relax: front-end experts will catch the front-end issues, SQL experts will remember the database exports, etc.

You don& #39;t have to keep everything in YOUR mind

#legacyOfSocrates
Typical scenario where mob programming shines

@WoodyZuill speaks from experience here
It started with a team of 6 and:

- pair-programming
- refactoring
- introducing tests

Learning to do "solo" work as a team

#legacyOfSocrates
A few reasons why teams still work in mob programming

#legacyOfSocrates
And we& #39;re off!

That was great. We& #39;ll take some rest, publish the videos and plan a 3rd edition some time later https://abs.twimg.com/emoji/v2/... draggable="false" alt="👍" title="Thumbs up" aria-label="Emoji: Thumbs up">

Thank you @adibolb for dealing with the tech side and @pbourgau @afilina @ToF_ @alexboly @WoodyZuill for the amazing talks https://abs.twimg.com/emoji/v2/... draggable="false" alt="🙏" title="Folded hands" aria-label="Emoji: Folded hands">https://abs.twimg.com/emoji/v2/... draggable="false" alt="❤️" title="Red heart" aria-label="Emoji: Red heart">

#legacyOfSocrates
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