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dea71670c0
Before this commit, you would have to use page bundles to do image processing etc. in Hugo.
This commit adds
* A new `/assets` top-level project or theme dir (configurable via `assetDir`)
* A new template func, `resources.Get` which can be used to "get a resource" that can be further processed.
This means that you can now do this in your templates (or shortcodes):
```bash
{{ $sunset := (resources.Get "images/sunset.jpg").Fill "300x200" }}
```
This also adds a new `extended` build tag that enables powerful SCSS/SASS support with source maps. To compile this from source, you will also need a C compiler installed:
```
HUGO_BUILD_TAGS=extended mage install
```
Note that you can use output of the SCSS processing later in a non-SCSSS-enabled Hugo.
The `SCSS` processor is a _Resource transformation step_ and it can be chained with the many others in a pipeline:
```bash
{{ $css := resources.Get "styles.scss" | resources.ToCSS | resources.PostCSS | resources.Minify | resources.Fingerprint }}
<link rel="stylesheet" href="{{ $styles.RelPermalink }}" integrity="{{ $styles.Data.Digest }}" media="screen">
```
The transformation funcs above have aliases, so it can be shortened to:
```bash
{{ $css := resources.Get "styles.scss" | toCSS | postCSS | minify | fingerprint }}
<link rel="stylesheet" href="{{ $styles.RelPermalink }}" integrity="{{ $styles.Data.Digest }}" media="screen">
```
A quick tip would be to avoid the fingerprinting part, and possibly also the not-superfast `postCSS` when you're doing development, as it allows Hugo to be smarter about the rebuilding.
Documentation will follow, but have a look at the demo repo in https://github.com/bep/hugo-sass-test
New functions to create `Resource` objects:
* `resources.Get` (see above)
* `resources.FromString`: Create a Resource from a string.
New `Resource` transformation funcs:
* `resources.ToCSS`: Compile `SCSS` or `SASS` into `CSS`.
* `resources.PostCSS`: Process your CSS with PostCSS. Config file support (project or theme or passed as an option).
* `resources.Minify`: Currently supports `css`, `js`, `json`, `html`, `svg`, `xml`.
* `resources.Fingerprint`: Creates a fingerprinted version of the given Resource with Subresource Integrity..
* `resources.Concat`: Concatenates a list of Resource objects. Think of this as a poor man's bundler.
* `resources.ExecuteAsTemplate`: Parses and executes the given Resource and data context (e.g. .Site) as a Go template.
Fixes #4381
Fixes #4903
Fixes #4858
77 lines
2.2 KiB
Go
77 lines
2.2 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 create contains functions for to create Resource objects. This will
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// typically non-files.
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package create
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import (
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"io"
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"path/filepath"
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"github.com/spf13/afero"
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"github.com/dsnet/golib/memfile"
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"github.com/gohugoio/hugo/resource"
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)
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// Client contains methods to create Resource objects.
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// tasks to Resource objects.
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type Client struct {
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rs *resource.Spec
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}
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// New creates a new Client with the given specification.
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func New(rs *resource.Spec) *Client {
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return &Client{rs: rs}
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}
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type memFileCloser struct {
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*memfile.File
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io.Closer
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}
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func (m *memFileCloser) Close() error {
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return nil
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}
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// Get creates a new Resource by opening the given filename in the given filesystem.
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func (c *Client) Get(fs afero.Fs, filename string) (resource.Resource, error) {
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filename = filepath.Clean(filename)
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return c.rs.ResourceCache.GetOrCreate(resource.ResourceKeyPartition(filename), filename, func() (resource.Resource, error) {
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return c.rs.NewForFs(fs,
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resource.ResourceSourceDescriptor{
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LazyPublish: true,
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SourceFilename: filename})
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})
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}
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// FromString creates a new Resource from a string with the given relative target path.
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func (c *Client) FromString(targetPath, content string) (resource.Resource, error) {
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return c.rs.ResourceCache.GetOrCreate(resource.CACHE_OTHER, targetPath, func() (resource.Resource, error) {
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return c.rs.NewForFs(
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c.rs.BaseFs.Resources.Fs,
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resource.ResourceSourceDescriptor{
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LazyPublish: true,
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OpenReadSeekCloser: func() (resource.ReadSeekCloser, error) {
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return &memFileCloser{
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File: memfile.New([]byte(content)),
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}, nil
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},
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RelTargetFilename: filepath.Clean(targetPath)})
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})
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}
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