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Add Hugo Piper with SCSS support and much more

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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
This commit is contained in:
Bjørn Erik Pedersen
2018-02-20 10:02:14 +01:00
parent a5d0a57e6b
commit dea71670c0
90 changed files with 4685 additions and 1125 deletions
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10
tpl/tplimpl/templateFuncster.go
View File

@@ -51,12 +51,12 @@ func (t *templateFuncster) partial(name string, contextList ...interface{}) (int
}
for _, n := range []string{"partials/" + name, "theme/partials/" + name} {
templ := t.Tmpl.Lookup(n)
if templ == nil {
templ, found := t.Tmpl.Lookup(n)
if !found {
// For legacy reasons.
templ = t.Tmpl.Lookup(n + ".html")
templ, found = t.Tmpl.Lookup(n + ".html")
}
if templ != nil {
if found {
b := bp.GetBuffer()
defer bp.PutBuffer(b)
@@ -64,7 +64,7 @@ func (t *templateFuncster) partial(name string, contextList ...interface{}) (int
return "", err
}
if _, ok := templ.Template.(*texttemplate.Template); ok {
if _, ok := templ.(*texttemplate.Template); ok {
return b.String(), nil
}