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cmd/go: print offending -mod value in workspace mode

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Workspace mode only allows -mod to be set to 'readonly'. When returning
the error for other values of -mod, specify the the value in the error
so it's easier to see what's going on when the go command is invoked
through another tool.

For #45713, #48186

Change-Id: I3ba206a71c7a20c18aeccfa48f3c9dc935a180a4
Reviewed-on: https://go-review.googlesource.com/c/go/+/347593
Trust: Michael Matloob <matloob@golang.org>
Trust: Daniel Martí <mvdan@mvdan.cc>
Run-TryBot: Michael Matloob <matloob@golang.org>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Jay Conrod <jayconrod@google.com>
Reviewed-by: Daniel Martí <mvdan@mvdan.cc>
Reviewed-by: Bryan C. Mills <bcmills@google.com>
This commit is contained in:
Michael Matloob 2021-09-03 18:11:00 -04:00
parent 37c9552e06
commit 65f0d24f73
1 changed files with 3 additions and 3 deletions
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6
src/cmd/go/internal/modload/init.go
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@ -976,9 +976,9 @@ func requirementsFromModFiles(ctx context.Context, modFiles []*modfile.File) *Re
func setDefaultBuildMod() {
if cfg.BuildModExplicit {
if inWorkspaceMode() && cfg.BuildMod != "readonly" {
base.Fatalf("go: -mod may only be set to readonly when in workspace mode." +
"\n\tRemove the -mod flag to use the default readonly value," +
"\n\tor set -workfile=off to disable workspace mode.")
base.Fatalf("go: -mod may only be set to readonly when in workspace mode, but it is set to %q"+
"\n\tRemove the -mod flag to use the default readonly value,"+
"\n\tor set -workfile=off to disable workspace mode.", cfg.BuildMod)
}
// Don't override an explicit '-mod=' argument.
return