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Rework template handling for function and map lookups

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This is a big commit, but it deletes lots of code and simplifies a lot.

* Resolving the template funcs at execution time means we don't have to create template clones per site
* Having a custom map resolver means that we can remove the AST lower case transformation for the special lower case Params map

Not only is the above easier to reason about, it's also faster, especially if you have more than one language, as in the benchmark below:

```
name                          old time/op    new time/op    delta
SiteNew/Deep_content_tree-16    53.7ms ± 0%    48.1ms ± 2%  -10.38%  (p=0.029 n=4+4)

name                          old alloc/op   new alloc/op   delta
SiteNew/Deep_content_tree-16    41.0MB ± 0%    36.8MB ± 0%  -10.26%  (p=0.029 n=4+4)

name                          old allocs/op  new allocs/op  delta
SiteNew/Deep_content_tree-16      481k ± 0%      410k ± 0%  -14.66%  (p=0.029 n=4+4)
```

This should be even better if you also have lots of templates.

Closes #6594
This commit is contained in:
Bjørn Erik Pedersen 2019-12-10 19:56:44 +01:00
parent 167c01530b
commit a03c631c42
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GPG key ID: 330E6E2BD4859D8F
41 changed files with 1194 additions and 1898 deletions
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4
create/content_template_handler.go
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@ -129,7 +129,7 @@ func executeArcheTypeAsTemplate(s *hugolib.Site, name, kind, targetPath, archety
archetypeTemplate = []byte(archetypeShortcodeReplacementsPre.Replace(string(archetypeTemplate)))
// Reuse the Hugo template setup to get the template funcs properly set up.
templateHandler := s.Deps.Tmpl.(tpl.TemplateHandler)
templateHandler := s.Deps.Tmpl.(tpl.TemplateManager)
templateName := "_text/" + helpers.Filename(archetypeFilename)
if err := templateHandler.AddTemplate(templateName, string(archetypeTemplate)); err != nil {
return nil, errors.Wrapf(err, "Failed to parse archetype file %q:", archetypeFilename)
@ -138,7 +138,7 @@ func executeArcheTypeAsTemplate(s *hugolib.Site, name, kind, targetPath, archety
templ, _ := templateHandler.Lookup(templateName)
var buff bytes.Buffer
if err := templ.Execute(&buff, data); err != nil {
if err := templateHandler.Execute(templ, &buff, data); err != nil {
return nil, errors.Wrapf(err, "Failed to process archetype file %q:", archetypeFilename)
}