The pluginNameRe was a basic regular expression, effectively only checking
if the name consisted of lowercase alphanumeric characters. Replace it
with a minimal utility to do the same, without having to use regular
expressions (or the "lazyregexp" package).
Some quick benchmarking (not committed) show that the non-regex approach
is ~25x faster:
BenchmarkIsValidPluginName_Regex_Valid-10 13956240 81.39 ns/op 0 B/op 0 allocs/op
BenchmarkIsValidPluginName_Manual_Valid-10 360003060 3.318 ns/op 0 B/op 0 allocs/op
BenchmarkIsValidPluginName_Regex_Invalid-10 35281794 33.74 ns/op 0 B/op 0 allocs/op
BenchmarkIsValidPluginName_Manual_Invalid-10 906072663 1.320 ns/op 0 B/op 0 allocs/op
BenchmarkIsValidPluginName_Regex_Parallel-10 96595677 12.04 ns/op 0 B/op 0 allocs/op
BenchmarkIsValidPluginName_Manual_Parallel-10 1000000000 0.4541 ns/op 0 B/op 0 allocs/op
Signed-off-by: Sebastiaan van Stijn <github@gone.nl>
2351f5b915