How Drupal use Composer and how Composer will make you a better developer

1. Drupal & Composer
The romance recalibration

2. Summary
- Semver Notation
- Update Path Strategy with Drupal
- What should be updated
- Which version to choose
- Coder Strategy
- Composer Update
- Minor version
- Major version
- How to deal with unusable patch
- How to deal with composer.lock conflict

3. Semantic
Versioning

4. - MAJOR when you make incompatible API changes
- MINOR when you add functionality backwards compatible
- PATCH when you make backwards compatible bug fixes
Structure
1 0 7
. .
MAJOR MINOR PATCH
MAJOR.MINOR.PATCH-LABEL (eg. 1.1.0-beta1)

5. Symboles
^
~
*
~1.0
~1.1.0
1.*
1.1.*
^1.0
^1.1.0
<
<1.0
<1.1.0
>=1.0 <2.0.0
>=1.1.0 <1.2.0
>=1.0 <2.0.0
>=1.1.0 <2.0.0
>=1.0 <2.0.0
>=1.1.0 <1.2.0
allows the last digit
to go up
maximum
interoperability w/
backwards compatibility

6. Strict constraint are those constraints matching only one
version.
- Won't ever get bug fixes
- Dependency management harder when having a dependency in
common with another package
Why using strict constraint is bad

7. Let’s practice
drupal/core:^8.9 8.9.100
8.10.0
9.0-beta1
8.8
drupal/core:~8.9 8.9.1
8.10.0
drupal/core:~8.9.0 8.9.1
8.10.0
✅
🚫
✅
🚫
✅
✅
✅
🚫

8. Update Path Strategy
with Drupal

9. What should be updated
- composer outdated 'drupal/*'
- Access to the Report Dashboard “admin/reports/updates”

10. Which version to choose
- One rule, read the Release Notes

11. Which version to choose

12. Which version to choose

13. Composer
Update

14. Coder Strategy
- Check modules available
updates (composer outdated
& dashboard)
- Update each modules one
by one (with updatedb &
cex > then commit)
- Update Drupal Core /
Core-Recommended (with
updatedb & cex > then
commit)

15. Minor vs Major updates

16. How to …

17. … deal with unusable patch
Go to the Issue using Patch name: https://www.drupal.org/
project/bamboo_twig/issues/3125699
- Someone has already rerolled the patch, then use the
new one
- Has been merged
- You need to create a rerolled patch

18. … deal with unusable patch

19. … deal with composer.lock conflict

20. Thanks 🍺😘
!
" wengerk
wengerk