var golang.org/x/tools/internal/gocommand.modFlagRegexp
2 uses
golang.org/x/tools/internal/gocommand (current package)
vendor.go#L35: var modFlagRegexp = regexp.MustCompile(`-mod[ =](\w+)`)
vendor.go#L55: matches := modFlagRegexp.FindStringSubmatch(goflags)
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