hugo/tpl/tplimpl/shortcodes.go

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// Copyright 2019 The Hugo Authors. All rights reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package tplimpl
import (
"strings"
"github.com/gohugoio/hugo/tpl"
)
// Currently lang, outFormat, suffix
const numTemplateVariants = 3
type shortcodeVariant struct {
// The possible variants: lang, outFormat, suffix
// gtag
// gtag.html
// gtag.no.html
// gtag.no.amp.html
// A slice of length numTemplateVariants.
variants []string
tpl/tplimpl: Rework template management to get rid of concurrency issues This more or less completes the simplification of the template handling code in Hugo started in v0.62. The main motivation was to fix a long lasting issue about a crash in HTML content files without front matter. But this commit also comes with a big functional improvement. As we now have moved the base template evaluation to the build stage we now use the same lookup rules for `baseof` as for `list` etc. type of templates. This means that in this simple example you can have a `baseof` template for the `blog` section without having to duplicate the others: ``` layouts ├── _default │   ├── baseof.html │   ├── list.html │   └── single.html └── blog └── baseof.html ``` Also, when simplifying code, you often get rid of some double work, as shown in the "site building" benchmarks below. These benchmarks looks suspiciously good, but I have repeated the below with ca. the same result. Compared to master: ``` name old time/op new time/op delta SiteNew/Bundle_with_image-16 13.1ms ± 1% 10.5ms ± 1% -19.34% (p=0.029 n=4+4) SiteNew/Bundle_with_JSON_file-16 13.0ms ± 0% 10.7ms ± 1% -18.05% (p=0.029 n=4+4) SiteNew/Tags_and_categories-16 46.4ms ± 2% 43.1ms ± 1% -7.15% (p=0.029 n=4+4) SiteNew/Canonify_URLs-16 52.2ms ± 2% 47.8ms ± 1% -8.30% (p=0.029 n=4+4) SiteNew/Deep_content_tree-16 77.9ms ± 1% 70.9ms ± 1% -9.01% (p=0.029 n=4+4) SiteNew/Many_HTML_templates-16 43.0ms ± 0% 37.2ms ± 1% -13.54% (p=0.029 n=4+4) SiteNew/Page_collections-16 58.2ms ± 1% 52.4ms ± 1% -9.95% (p=0.029 n=4+4) name old alloc/op new alloc/op delta SiteNew/Bundle_with_image-16 3.81MB ± 0% 2.22MB ± 0% -41.70% (p=0.029 n=4+4) SiteNew/Bundle_with_JSON_file-16 3.60MB ± 0% 2.01MB ± 0% -44.20% (p=0.029 n=4+4) SiteNew/Tags_and_categories-16 19.3MB ± 1% 14.1MB ± 0% -26.91% (p=0.029 n=4+4) SiteNew/Canonify_URLs-16 70.7MB ± 0% 69.0MB ± 0% -2.40% (p=0.029 n=4+4) SiteNew/Deep_content_tree-16 37.1MB ± 0% 31.2MB ± 0% -15.94% (p=0.029 n=4+4) SiteNew/Many_HTML_templates-16 17.6MB ± 0% 10.6MB ± 0% -39.92% (p=0.029 n=4+4) SiteNew/Page_collections-16 25.9MB ± 0% 21.2MB ± 0% -17.99% (p=0.029 n=4+4) name old allocs/op new allocs/op delta SiteNew/Bundle_with_image-16 52.3k ± 0% 26.1k ± 0% -50.18% (p=0.029 n=4+4) SiteNew/Bundle_with_JSON_file-16 52.3k ± 0% 26.1k ± 0% -50.16% (p=0.029 n=4+4) SiteNew/Tags_and_categories-16 336k ± 1% 269k ± 0% -19.90% (p=0.029 n=4+4) SiteNew/Canonify_URLs-16 422k ± 0% 395k ± 0% -6.43% (p=0.029 n=4+4) SiteNew/Deep_content_tree-16 401k ± 0% 313k ± 0% -21.79% (p=0.029 n=4+4) SiteNew/Many_HTML_templates-16 247k ± 0% 143k ± 0% -42.17% (p=0.029 n=4+4) SiteNew/Page_collections-16 282k ± 0% 207k ± 0% -26.55% (p=0.029 n=4+4) ``` Fixes #6716 Fixes #6760 Fixes #6768 Fixes #6778
2020-01-15 14:59:56 +00:00
ts *templateState
}
type shortcodeTemplates struct {
variants []shortcodeVariant
}
func (s *shortcodeTemplates) indexOf(variants []string) int {
L:
for i, v1 := range s.variants {
for i, v2 := range v1.variants {
if v2 != variants[i] {
continue L
}
}
return i
}
return -1
}
func (s *shortcodeTemplates) fromVariants(variants tpl.TemplateVariants) (shortcodeVariant, bool) {
return s.fromVariantsSlice([]string{
variants.Language,
strings.ToLower(variants.OutputFormat.Name),
variants.OutputFormat.MediaType.Suffix(),
})
}
func (s *shortcodeTemplates) fromVariantsSlice(variants []string) (shortcodeVariant, bool) {
var (
bestMatch shortcodeVariant
bestMatchWeight int
)
for _, variant := range s.variants {
w := s.compareVariants(variants, variant.variants)
if bestMatchWeight == 0 || w > bestMatchWeight {
bestMatch = variant
bestMatchWeight = w
}
}
return bestMatch, true
}
2019-07-31 12:36:36 +00:00
// calculate a weight for two string slices of same length.
// higher value means "better match".
func (s *shortcodeTemplates) compareVariants(a, b []string) int {
weight := 0
k := len(a)
for i, av := range a {
bv := b[i]
if av == bv {
// Add more weight to the left side (language...).
weight = weight + k - i
} else {
weight--
}
}
return weight
}
func templateVariants(name string) []string {
_, variants := templateNameAndVariants(name)
return variants
}
func templateNameAndVariants(name string) (string, []string) {
variants := make([]string, numTemplateVariants)
parts := strings.Split(name, ".")
if len(parts) <= 1 {
// No variants.
return name, variants
}
name = parts[0]
parts = parts[1:]
lp := len(parts)
start := len(variants) - lp
for i, j := start, 0; i < len(variants); i, j = i+1, j+1 {
variants[i] = parts[j]
}
if lp > 1 && lp < len(variants) {
for i := lp - 1; i > 0; i-- {
variants[i-1] = variants[i]
}
}
if lp == 1 {
// Suffix only. Duplicate it into the output format field to
// make HTML win over AMP.
variants[len(variants)-2] = variants[len(variants)-1]
}
return name, variants
}
func resolveTemplateType(name string) templateType {
if isShortcode(name) {
return templateShortcode
}
if strings.Contains(name, "partials/") {
return templatePartial
}
return templateUndefined
}
func isShortcode(name string) bool {
return strings.Contains(name, shortcodesPathPrefix)
}
func isInternal(name string) bool {
return strings.HasPrefix(name, internalPathPrefix)
}