Our nightly says -b chromium -b firefox -b webkit. I noticed --project-matrix in the flag list and it looks like it does the same thing. Is one of them preferred, and what happens if I pass both?
asked by Sergio Alcaraz415 ·
--project-matrix or three -b flags? What is the difference in practice?
Asked 4,900 views3 answers
3 answers
Accepted answer
--project-matrixmeans "every browser declared in the project YAML". Your three-bflags mean "these three, whatever the project says".Prefer the matrix flag for a nightly: when someone adds a browser to the project, the nightly picks it up without an edit to your CI file. Prefer explicit
-bwhere the point is that this job runs one specific engine — a pull request check on chromium, say.Note that
-bis checked against the project's allow-list either way:textBrowser "webkit" is not enabled for project demo-shop (browsers: chromium, firefox).Exit 2, before anything runs.
answered by Sunita Kale982 ·If you pass both,
--project-matrixwins — it is read first and the-bvalues are ignored. Not an error, which is arguably too quiet, so do not write both and expect an intersection.The full precedence for browsers is:
--project-matrix, then explicit-b, then the browsers of a--process, then the project default.answered by Reeta Nandalmaintainer41,280 ·From the release side: put the browser list in the process rather than in either flag.
release-gatenames its browsers in YAML, so the gate cannot drift because someone edited a workflow, and the list is reviewable in the same place as the pass-rate gate.answered by Rasha Halabi572 ·
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