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tpl: Rework to handle both text and HTML templates

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Before this commit, Hugo used `html/template` for all Go templates.

While this is a fine choice for HTML and maybe also RSS feeds, it is painful for plain text formats such as CSV, JSON etc.

This commit fixes that by using the `IsPlainText` attribute on the output format to decide what to use.

A couple of notes:

* The above requires a nonambiguous template name to type mapping. I.e. `/layouts/_default/list.json` will only work if there is only one JSON output format, `/layouts/_default/list.mytype.json` will always work.
* Ambiguous types will fall back to HTML.
* Partials inherits the text vs HTML identificator of the container template. This also means that plain text templates can only include plain text partials.
* Shortcode templates are, by definition, currently HTML templates only.

Fixes #3221
This commit is contained in:
Bjørn Erik Pedersen
2017-03-27 20:43:49 +02:00
parent 73c1c7b69d
commit 5c5efa03d2
31 changed files with 1208 additions and 840 deletions
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12
tpl/tplimpl/template_ast_transformers_test.go
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@@ -115,13 +115,13 @@ F3: {{ Echo (printf "themes/%s-theme" .Site.Params.LOWER) }}
func TestParamsKeysToLower(t *testing.T) {
t.Parallel()
require.Error(t, applyTemplateTransformers(nil))
require.Error(t, applyTemplateTransformers(nil, nil))
templ, err := template.New("foo").Funcs(testFuncs).Parse(paramsTempl)
require.NoError(t, err)
c := newTemplateContext(templ)
c := newTemplateContext(createParseTreeLookup(templ))
require.Equal(t, -1, c.decl.indexOfReplacementStart([]string{}))
@@ -185,7 +185,7 @@ func BenchmarkTemplateParamsKeysToLower(b *testing.B) {
b.ResetTimer()
for i := 0; i < b.N; i++ {
c := newTemplateContext(templates[i])
c := newTemplateContext(createParseTreeLookup(templates[i]))
c.paramsKeysToLower(templ.Tree.Root)
}
}
@@ -214,7 +214,7 @@ Blue: {{ $__amber_1.Blue}}
require.NoError(t, err)
c := newTemplateContext(templ)
c := newTemplateContext(createParseTreeLookup(templ))
c.paramsKeysToLower(templ.Tree.Root)
@@ -254,7 +254,7 @@ P2: {{ .Params.LOWER }}
require.NoError(t, err)
overlayTpl = overlayTpl.Lookup(overlayTpl.Name())
c := newTemplateContext(overlayTpl)
c := newTemplateContext(createParseTreeLookup(overlayTpl))
c.paramsKeysToLower(overlayTpl.Tree.Root)
@@ -284,7 +284,7 @@ func TestTransformRecursiveTemplate(t *testing.T) {
templ, err := template.New("foo").Parse(recursive)
require.NoError(t, err)
c := newTemplateContext(templ)
c := newTemplateContext(createParseTreeLookup(templ))
c.paramsKeysToLower(templ.Tree.Root)
}