go
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cmd/go: add 'go generate -skip'
We currently have the -run flag, but I believe it is currently impossible to supply a regular expression that would allow for excluding a certain expression (due to no lookaheads in Go's regex syntax). Being able to exclude expressions would be useful if we want to exclude certain directives that are time-consuming and are not needed in the moment, and we want to run a large amount of other directives, so that it would be impractical to simply run go generate multiple times with different -run flags.
I think one way to implement this could be an additional flag. Similar to grep's --invert-match flag, we could do something like:
go generate -invertmatch -run="my excluded pattern" ./...
Alternatively, we could also have a different flag that is used instead of -run, like:
go generate -runexcept="my excluded pattern" ./...
Here, supplying both -runexcept and -run would be invalid.
I'm not sure we should do anything here, but if we did, it should apply to the other -run flags too.
#41583 is an accepted proposal for a go test -skip flag that sounds similar. What about bringing that to go generate?
This proposal has been added to the active column of the proposals project and will now be reviewed at the weekly proposal review meetings. — rsc for the proposal review group
Based on the discussion above, this proposal seems like a likely accept. — rsc for the proposal review group
No change in consensus, so accepted. 🎉 This issue now tracks the work of implementing the proposal. — rsc for the proposal review group
Change https://go.dev/cl/421440 mentions this issue: cmd/go: add go generate -skip flag
