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https://github.com/gohugoio/hugo.git
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e27fd4c1b8
Before this commit you would typically use `.Scratch.Add` to manually create slices in a loop.
With variable overwrite in Go 1.11, we can do better. This commit adds the `append` template func.
A made-up example:
```bash
{{ $p1 := index .Site.RegularPages 0 }}{{ $p2 := index .Site.RegularPages 1 }}
{{ $pages := slice }}
{{ if true }}
{{ $pages = $pages | append $p2 $p1 }}
{{ end }}
```
Note that with 2 slices as arguments, the two examples below will give the same result:
```bash
{{ $s1 := slice "a" "b" | append (slice "c" "d") }}
{{ $s2 := slice "a" "b" | append "c" "d" }}
```
Both of the above will give `[]string{a, b, c, d}`.
This commit also improves the type handling in the `slice` template function. Now `slice "a" "b"` will give a `[]string` slice. The old behaviour was to return a `[]interface{}`.
Fixes #5190
142 lines
4.3 KiB
Go
142 lines
4.3 KiB
Go
// Copyright 2018 The Hugo Authors. All rights reserved.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package hugolib
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import (
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"fmt"
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"testing"
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"github.com/stretchr/testify/require"
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)
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func TestGroupFunc(t *testing.T) {
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assert := require.New(t)
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pageContent := `
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---
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title: "Page"
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---
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`
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b := newTestSitesBuilder(t)
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b.WithSimpleConfigFile().
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WithContent("page1.md", pageContent, "page2.md", pageContent).
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WithTemplatesAdded("index.html", `
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{{ $cool := .Site.RegularPages | group "cool" }}
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{{ $cool.Key }}: {{ len $cool.Pages }}
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`)
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b.CreateSites().Build(BuildCfg{})
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assert.Equal(1, len(b.H.Sites))
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require.Len(t, b.H.Sites[0].RegularPages, 2)
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b.AssertFileContent("public/index.html", "cool: 2")
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}
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func TestSliceFunc(t *testing.T) {
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assert := require.New(t)
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pageContent := `
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---
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title: "Page"
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tags: ["blue", "green"]
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tags_weight: %d
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---
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`
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b := newTestSitesBuilder(t)
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b.WithSimpleConfigFile().
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WithContent("page1.md", fmt.Sprintf(pageContent, 10), "page2.md", fmt.Sprintf(pageContent, 20)).
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WithTemplatesAdded("index.html", `
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{{ $cool := first 1 .Site.RegularPages | group "cool" }}
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{{ $blue := after 1 .Site.RegularPages | group "blue" }}
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{{ $weightedPages := index (index .Site.Taxonomies "tags") "blue" }}
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{{ $p1 := index .Site.RegularPages 0 }}{{ $p2 := index .Site.RegularPages 1 }}
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{{ $wp1 := index $weightedPages 0 }}{{ $wp2 := index $weightedPages 1 }}
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{{ $pages := slice $p1 $p2 }}
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{{ $pageGroups := slice $cool $blue }}
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{{ $weighted := slice $wp1 $wp2 }}
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{{ printf "pages:%d:%T:%v/%v" (len $pages) $pages (index $pages 0) (index $pages 1) }}
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{{ printf "pageGroups:%d:%T:%v/%v" (len $pageGroups) $pageGroups (index (index $pageGroups 0).Pages 0) (index (index $pageGroups 1).Pages 0)}}
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{{ printf "weightedPages:%d::%T:%v" (len $weighted) $weighted $weighted | safeHTML }}
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`)
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b.CreateSites().Build(BuildCfg{})
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assert.Equal(1, len(b.H.Sites))
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require.Len(t, b.H.Sites[0].RegularPages, 2)
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b.AssertFileContent("public/index.html",
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"pages:2:hugolib.Pages:Page(/page1.md)/Page(/page2.md)",
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"pageGroups:2:hugolib.PagesGroup:Page(/page1.md)/Page(/page2.md)",
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`weightedPages:2::hugolib.WeightedPages:[WeightedPage(10,"Page") WeightedPage(20,"Page")]`)
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}
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func TestAppendFunc(t *testing.T) {
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assert := require.New(t)
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pageContent := `
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---
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title: "Page"
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tags: ["blue", "green"]
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tags_weight: %d
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---
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`
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b := newTestSitesBuilder(t)
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b.WithSimpleConfigFile().
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WithContent("page1.md", fmt.Sprintf(pageContent, 10), "page2.md", fmt.Sprintf(pageContent, 20)).
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WithTemplatesAdded("index.html", `
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{{ $p1 := index .Site.RegularPages 0 }}{{ $p2 := index .Site.RegularPages 1 }}
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{{ $pages := slice }}
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{{ if true }}
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{{ $pages = $pages | append $p2 $p1 }}
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{{ end }}
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{{ $appendPages := .Site.Pages | append .Site.RegularPages }}
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{{ $appendStrings := slice "a" "b" | append "c" "d" "e" }}
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{{ $appendStringsSlice := slice "a" "b" "c" | append (slice "c" "d") }}
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{{ printf "pages:%d:%T:%v/%v" (len $pages) $pages (index $pages 0) (index $pages 1) }}
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{{ printf "appendPages:%d:%T:%v/%v" (len $appendPages) $appendPages (index $appendPages 0).Kind (index $appendPages 8).Kind }}
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{{ printf "appendStrings:%T:%v" $appendStrings $appendStrings }}
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{{ printf "appendStringsSlice:%T:%v" $appendStringsSlice $appendStringsSlice }}
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{{/* add some slightly related funcs to check what types we get */}}
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{{ $u := $appendStrings | union $appendStringsSlice }}
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{{ $i := $appendStrings | intersect $appendStringsSlice }}
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{{ printf "union:%T:%v" $u $u }}
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{{ printf "intersect:%T:%v" $i $i }}
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`)
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b.CreateSites().Build(BuildCfg{})
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assert.Equal(1, len(b.H.Sites))
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require.Len(t, b.H.Sites[0].RegularPages, 2)
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b.AssertFileContent("public/index.html",
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"pages:2:hugolib.Pages:Page(/page2.md)/Page(/page1.md)",
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"appendPages:9:hugolib.Pages:home/page",
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"appendStrings:[]string:[a b c d e]",
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"appendStringsSlice:[]string:[a b c c d]",
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"union:[]string:[a b c d e]",
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"intersect:[]string:[a b c d]",
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)
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}
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