hugo/resource/create/create.go
Bjørn Erik Pedersen f7aeaa6129 Add a consolidated file cache
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
2018-11-13 14:19:42 +01:00

64 lines
2.1 KiB
Go

// Copyright 2018 The Hugo Authors. All rights reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
// Package create contains functions for to create Resource objects. This will
// typically non-files.
package create
import (
"path/filepath"
"github.com/spf13/afero"
"github.com/gohugoio/hugo/common/hugio"
"github.com/gohugoio/hugo/resource"
)
// Client contains methods to create Resource objects.
// tasks to Resource objects.
type Client struct {
rs *resource.Spec
}
// New creates a new Client with the given specification.
func New(rs *resource.Spec) *Client {
return &Client{rs: rs}
}
// Get creates a new Resource by opening the given filename in the given filesystem.
func (c *Client) Get(fs afero.Fs, filename string) (resource.Resource, error) {
filename = filepath.Clean(filename)
return c.rs.ResourceCache.GetOrCreate(resource.ResourceKeyPartition(filename), filename, func() (resource.Resource, error) {
return c.rs.NewForFs(fs,
resource.ResourceSourceDescriptor{
LazyPublish: true,
SourceFilename: filename})
})
}
// FromString creates a new Resource from a string with the given relative target path.
func (c *Client) FromString(targetPath, content string) (resource.Resource, error) {
return c.rs.ResourceCache.GetOrCreate(resource.CACHE_OTHER, targetPath, func() (resource.Resource, error) {
return c.rs.NewForFs(
c.rs.FileCaches.AssetsCache().Fs,
resource.ResourceSourceDescriptor{
LazyPublish: true,
OpenReadSeekCloser: func() (hugio.ReadSeekCloser, error) {
return hugio.NewReadSeekerNoOpCloserFromString(content), nil
},
RelTargetFilename: filepath.Clean(targetPath)})
})
}