mirror of
https://github.com/gohugoio/hugo.git
synced 2024-11-29 14:42:09 -05:00
02eaddc2fb
Before this commit, due to a bug in Go's `text/template` package, this would print different output for typed nil interface values:
```
{{ if .AuthenticatedUser }}User is authenticated!{{ else }}{{ end }}
{{ if not .AuthenticatedUser }}{{ else }}}User is authenticated!{{ end }}
```
This commit works around this by wrapping every `if` and `with` with a custom `getif` template func with truth logic that matches `not`, `and` and `or`.
Those 3 template funcs from Go's stdlib are now pulled into Hugo's source tree and adjusted to support custom zero values, e.g. types that implement `IsZero`.
This means that you can now do:
```
{{ with .Date }}{{ . }}{{ end }}
```
And it would work as expected.
Fixes #5738
107 lines
2.3 KiB
Go
107 lines
2.3 KiB
Go
// Copyright 2017 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 compare
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import (
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"github.com/gohugoio/hugo/deps"
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"github.com/gohugoio/hugo/tpl/internal"
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)
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const name = "compare"
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func init() {
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f := func(d *deps.Deps) *internal.TemplateFuncsNamespace {
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ctx := New()
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ns := &internal.TemplateFuncsNamespace{
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Name: name,
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Context: func(args ...interface{}) interface{} { return ctx },
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}
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ns.AddMethodMapping(ctx.Default,
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[]string{"default"},
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[][2]string{
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{`{{ "Hugo Rocks!" | default "Hugo Rules!" }}`, `Hugo Rocks!`},
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{`{{ "" | default "Hugo Rules!" }}`, `Hugo Rules!`},
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},
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)
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ns.AddMethodMapping(ctx.Eq,
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[]string{"eq"},
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[][2]string{
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{`{{ if eq .Section "blog" }}current{{ end }}`, `current`},
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},
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)
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ns.AddMethodMapping(ctx.Ge,
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[]string{"ge"},
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[][2]string{
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{`{{ if ge .Hugo.Version "0.36" }}Reasonable new Hugo version!{{ end }}`, `Reasonable new Hugo version!`},
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},
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)
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ns.AddMethodMapping(ctx.Gt,
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[]string{"gt"},
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[][2]string{},
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)
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ns.AddMethodMapping(ctx.Le,
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[]string{"le"},
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[][2]string{},
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)
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ns.AddMethodMapping(ctx.Lt,
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[]string{"lt"},
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[][2]string{},
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)
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ns.AddMethodMapping(ctx.Ne,
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[]string{"ne"},
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[][2]string{},
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)
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ns.AddMethodMapping(ctx.And,
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[]string{"and"},
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[][2]string{},
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)
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ns.AddMethodMapping(ctx.Or,
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[]string{"or"},
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[][2]string{},
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)
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// getif is used internally by Hugo. Do not document.
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ns.AddMethodMapping(ctx.getIf,
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[]string{"getif"},
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[][2]string{},
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)
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ns.AddMethodMapping(ctx.Not,
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[]string{"not"},
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[][2]string{},
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)
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ns.AddMethodMapping(ctx.Conditional,
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[]string{"cond"},
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[][2]string{
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{`{{ cond (eq (add 2 2) 4) "2+2 is 4" "what?" | safeHTML }}`, `2+2 is 4`},
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},
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)
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return ns
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}
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internal.AddTemplateFuncsNamespace(f)
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}
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