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| author | Lars Wirzenius <lwirzenius@wikimedia.org> | 2019-05-02 20:09:11 +0300 |
|---|---|---|
| committer | Lars Wirzenius <lwirzenius@wikimedia.org> | 2019-05-02 20:09:11 +0300 |
| commit | 90edeaa1871ff2ab806ea9e93d7a6eef570a2146 (patch) | |
| tree | c90b0e8aa2d0019285f3dfab285843df1e1a1433 | |
| parent | 45d9a6ffa2fa4bf7a1f98a6f3f5a758402c4b65d (diff) | |
| download | wmf-ci-arch-90edeaa1871ff2ab806ea9e93d7a6eef570a2146.tar.gz | |
Change: clarify interdep changes
| -rw-r--r-- | ci-arch.mdwn | 15 |
1 files changed, 14 insertions, 1 deletions
diff --git a/ci-arch.mdwn b/ci-arch.mdwn index 8e1ace6..9ce72dc 100644 --- a/ci-arch.mdwn +++ b/ci-arch.mdwn @@ -323,11 +323,24 @@ we plan CI to implement them. * this is the simplest possible use case for CI -## interdependent changes +## Interdependent changes * changes to two or more components that must all be applied at once or not at all, e.g., to mediawiki core and an extension +* in this scenario the change to MediaWiki core and the change to an + extension may depend on each other, so that if either is deployed + without the other, the system as a whole breaks; thus, either both + changes get deployed, or neither + +* Lars's opinion: this seems like a bad way of managing development. + It seems better to be careful with such changes so that they can be + disabled behind a feature flag in the configuration, or by + autodetection of the other component, so that if only one component + has been changed, it can stillbe deployed. Only when both components + have been changed in production is the feature flag enabled, and the + new feature works. + ## Security embargoed change * change can't be public until it's deployed or manually made public |