mirror of
https://github.com/gohugoio/hugo.git
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f7aeaa6129
This commits reworks how file caching is performed in Hugo. Now there is only one way, and it can be configured.
This is the default configuration:
```toml
[caches]
[caches.getjson]
dir = ":cacheDir"
maxAge = -1
[caches.getcsv]
dir = ":cacheDir"
maxAge = -1
[caches.images]
dir = ":resourceDir/_gen"
maxAge = -1
[caches.assets]
dir = ":resourceDir/_gen"
maxAge = -1
```
You can override any of these cache setting in your own `config.toml`.
The placeholders explained:
`:cacheDir`: This is the value of the `cacheDir` config option if set (can also be set via OS env variable `HUGO_CACHEDIR`). It will fall back to `/opt/build/cache/hugo_cache/` on Netlify, or a `hugo_cache` directory below the OS temp dir for the others.
`:resourceDir`: This is the value of the `resourceDir` config option.
`maxAge` is the time in seconds before a cache entry will be evicted, -1 means forever and 0 effectively turns that particular cache off.
This means that if you run your builds on Netlify, all caches configured with `:cacheDir` will be saved and restored on the next build. For other CI vendors, please read their documentation. For an CircleCI example, see 6c3960a8f4/.circleci/config.yml
Fixes #5404
123 lines
3.1 KiB
Go
123 lines
3.1 KiB
Go
// Copyright 2016 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 data
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import (
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"io/ioutil"
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"net/http"
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"path/filepath"
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"time"
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"github.com/pkg/errors"
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"github.com/gohugoio/hugo/cache/filecache"
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"github.com/gohugoio/hugo/config"
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"github.com/gohugoio/hugo/helpers"
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"github.com/spf13/afero"
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)
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var (
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resSleep = time.Second * 2 // if JSON decoding failed sleep for n seconds before retrying
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resRetries = 1 // number of retries to load the JSON from URL
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)
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// getRemote loads the content of a remote file. This method is thread safe.
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func (ns *Namespace) getRemote(cache *filecache.Cache, unmarshal func([]byte) (error, bool), req *http.Request) error {
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url := req.URL.String()
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id := helpers.MD5String(url)
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var handled bool
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var retry bool
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_, b, err := cache.GetOrCreateBytes(id, func() ([]byte, error) {
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var err error
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handled = true
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for i := 0; i <= resRetries; i++ {
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ns.deps.Log.INFO.Printf("Downloading: %s ...", url)
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var res *http.Response
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res, err = ns.client.Do(req)
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if err != nil {
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return nil, err
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}
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if isHTTPError(res) {
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return nil, errors.Errorf("Failed to retrieve remote file: %s", http.StatusText(res.StatusCode))
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}
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var b []byte
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b, err = ioutil.ReadAll(res.Body)
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if err != nil {
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return nil, err
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}
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res.Body.Close()
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err, retry = unmarshal(b)
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if err == nil {
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// Return it so it can be cached.
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return b, nil
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}
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if !retry {
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return nil, err
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}
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ns.deps.Log.INFO.Printf("Cannot read remote resource %s: %s", url, err)
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ns.deps.Log.INFO.Printf("Retry #%d for %s and sleeping for %s", i+1, url, resSleep)
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time.Sleep(resSleep)
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}
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return nil, err
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})
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if !handled {
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// This is cached content and should be correct.
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err, _ = unmarshal(b)
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}
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return err
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}
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// getLocal loads the content of a local file
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func getLocal(url string, fs afero.Fs, cfg config.Provider) ([]byte, error) {
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filename := filepath.Join(cfg.GetString("workingDir"), url)
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if e, err := helpers.Exists(filename, fs); !e {
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return nil, err
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}
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return afero.ReadFile(fs, filename)
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}
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// getResource loads the content of a local or remote file and returns its content and the
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// cache ID used, if relevant.
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func (ns *Namespace) getResource(cache *filecache.Cache, unmarshal func(b []byte) (error, bool), req *http.Request) error {
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switch req.URL.Scheme {
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case "":
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b, err := getLocal(req.URL.String(), ns.deps.Fs.Source, ns.deps.Cfg)
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if err != nil {
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return err
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}
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err, _ = unmarshal(b)
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return err
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default:
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return ns.getRemote(cache, unmarshal, req)
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}
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}
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func isHTTPError(res *http.Response) bool {
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return res.StatusCode < 200 || res.StatusCode > 299
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}
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