jolheiser
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overlay
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Add cache purge (#7)
continuous-integration/woodpecker the build was successful Details 

Reviewed-on: #7
Co-authored-by: jolheiser <john.olheiser@gmail.com>
Co-committed-by: jolheiser <john.olheiser@gmail.com>
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jolheiser 2021-10-08 21:26:02 +00:00
parent 99bf189237
commit eefdce7b03
2 changed files with 9 additions and 14 deletions
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9
bench.txt
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@ -1,9 +0,0 @@
go test -benchmem -bench=.
goos: linux
goarch: amd64
pkg: go.jolheiser.com/overlay
cpu: Intel(R) Core(TM) i7-4700MQ CPU @ 2.40GHz
BenchmarkCache-8 134959974 9.003 ns/op 0 B/op 0 allocs/op
BenchmarkNoCache-8 897212 1369 ns/op 280 B/op 4 allocs/op
PASS
ok go.jolheiser.com/overlay 3.360s

14
overlay.go
View File

@ -18,12 +18,17 @@ type FS struct {
cache map[string]bool cache map[string]bool
} }
// PurgeCache purges the cache
func (f *FS) PurgeCache() {
f.cache = make(map[string]bool)
}
func (f *FS) apn(name string) string { func (f *FS) apn(name string) string {
return path.Join(f.root, name) return path.Join(f.root, name)
} }
func (f *FS) exists(name string) bool { func (f *FS) exists(name string) bool {
if has, ok := f.cache[name]; ok && f.doCache { if has, ok := f.cache[name]; ok {
return has return has
} }
_, err := os.Stat(f.apn(name)) _, err := os.Stat(f.apn(name))
@ -63,10 +68,9 @@ type Option func(*FS) error
// New returns a new FS // New returns a new FS
func New(root string, fs fs.FS, opts ...Option) (*FS, error) { func New(root string, fs fs.FS, opts ...Option) (*FS, error) {
x := &FS{ x := &FS{
fs: fs, fs: fs,
root: root, root: root,
doCache: true, cache: make(map[string]bool),
cache: make(map[string]bool),
} }
for _, opt := range opts { for _, opt := range opts {