mirror of
https://github.com/danog/gojekyll.git
synced 2024-12-11 17:19:39 +01:00
104 lines
2.9 KiB
Go
104 lines
2.9 KiB
Go
// Package plugins holds emulated Jekyll plugins.
|
|
//
|
|
// Unlike Jekyll, these are baked into the executable -- both because as of 2017.07 package "plugin' currently
|
|
// works only on Linux, but also because the gojekyll implementation is immature and any possible interfaces
|
|
// are far from baked.
|
|
package plugins
|
|
|
|
import (
|
|
"fmt"
|
|
|
|
"github.com/osteele/gojekyll/config"
|
|
"github.com/osteele/gojekyll/pages"
|
|
"github.com/osteele/liquid"
|
|
"github.com/osteele/liquid/render"
|
|
)
|
|
|
|
// Site is the site interface that is available to a plugin.
|
|
type Site interface {
|
|
AddDocument(pages.Document, bool)
|
|
Config() *config.Config
|
|
Pages() []pages.Page
|
|
}
|
|
|
|
// Plugin describes the hooks that a plugin can override.
|
|
type Plugin interface {
|
|
ConfigureTemplateEngine(liquid.Engine) error
|
|
Initialize(Site) error
|
|
PostRead(site Site) error
|
|
}
|
|
|
|
type plugin struct{}
|
|
|
|
func (p plugin) ConfigureTemplateEngine(liquid.Engine) error { return nil }
|
|
func (p plugin) Initialize(Site) error { return nil }
|
|
func (p plugin) PostRead(Site) error { return nil }
|
|
|
|
// Lookup returns a plugin if it has been registered.
|
|
func Lookup(name string) (Plugin, bool) {
|
|
p, found := directory[name]
|
|
return p, found
|
|
}
|
|
|
|
// Install installs a plugin from the plugin directory.
|
|
func Install(names []string, site Site) {
|
|
for _, name := range names {
|
|
p, found := directory[name]
|
|
if found {
|
|
if err := p.Initialize(site); err != nil {
|
|
panic(err)
|
|
}
|
|
} else {
|
|
fmt.Printf("warning: gojekyll does not emulate the %s plugin.\n", name)
|
|
}
|
|
}
|
|
}
|
|
|
|
var directory = map[string]Plugin{}
|
|
|
|
// register installs a plugin in the plugin directory.
|
|
func register(name string, p Plugin) {
|
|
directory[name] = p
|
|
}
|
|
|
|
func init() {
|
|
register("jekyll-feed", jekyllFeedPlugin{})
|
|
register("jekyll-seo-tag", jekyllSEOTagPlugin{})
|
|
|
|
// the following plugins are always active
|
|
// no warning but effect; the server runs in this mode anyway
|
|
register("jekyll-live-reload", plugin{})
|
|
register("jekyll-sass-converter", plugin{})
|
|
}
|
|
|
|
type jekyllFeedPlugin struct{ plugin }
|
|
|
|
func (p jekyllFeedPlugin) ConfigureTemplateEngine(e liquid.Engine) error {
|
|
p.stubbed("jekyll-feed")
|
|
e.RegisterTag("feed_meta", p.makeUnimplementedTag("jekyll-feed"))
|
|
return nil
|
|
}
|
|
|
|
type jekyllSEOTagPlugin struct{ plugin }
|
|
|
|
func (p jekyllSEOTagPlugin) ConfigureTemplateEngine(e liquid.Engine) error {
|
|
p.stubbed("jekyll-seo-tag")
|
|
e.RegisterTag("seo", p.makeUnimplementedTag("jekyll-seo-tag"))
|
|
return nil
|
|
}
|
|
|
|
func (p plugin) stubbed(name string) {
|
|
fmt.Printf("warning: gojekyll does not emulate the %s plugin. Some tags have been stubbed to prevent errors.\n", name)
|
|
}
|
|
|
|
func (p plugin) makeUnimplementedTag(pluginName string) liquid.Renderer {
|
|
warned := false
|
|
return func(ctx render.Context) (string, error) {
|
|
if !warned {
|
|
fmt.Printf("The %q tag in the %q plugin has not been implemented.\n", ctx.TagName(), pluginName)
|
|
warned = true
|
|
}
|
|
return fmt.Sprintf(`<!-- unimplemented tag: %q -->`, ctx.TagName()), nil
|
|
}
|
|
}
|