mirror of
https://github.com/gohugoio/hugo.git
synced 2024-11-21 20:46:30 -05:00
80 lines
1.9 KiB
Go
80 lines
1.9 KiB
Go
// Copyright 2018 The Hugo Authors. All rights reserved.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package filecache
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import (
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"io"
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"os"
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"github.com/pkg/errors"
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"github.com/spf13/afero"
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)
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// Prune removes expired and unused items from this cache.
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// The last one requires a full build so the cache usage can be tracked.
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// Note that we operate directly on the filesystem here, so this is not
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// thread safe.
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func (c Caches) Prune() (int, error) {
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counter := 0
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for k, cache := range c {
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err := afero.Walk(cache.Fs, "", func(name string, info os.FileInfo, err error) error {
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if info == nil {
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return nil
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}
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name = cleanID(name)
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if info.IsDir() {
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f, err := cache.Fs.Open(name)
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if err != nil {
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// This cache dir may not exist.
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return nil
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}
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defer f.Close()
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_, err = f.Readdirnames(1)
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if err == io.EOF {
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// Empty dir.
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return cache.Fs.Remove(name)
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}
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return nil
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}
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shouldRemove := cache.isExpired(info.ModTime())
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if !shouldRemove && len(cache.nlocker.seen) > 0 {
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// Remove it if it's not been touched/used in the last build.
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_, seen := cache.nlocker.seen[name]
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shouldRemove = !seen
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}
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if shouldRemove {
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err := cache.Fs.Remove(name)
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if err == nil {
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counter++
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}
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return err
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}
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return nil
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})
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if err != nil {
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return counter, errors.Wrapf(err, "failed to prune cache %q", k)
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}
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}
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return counter, nil
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}
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