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https://github.com/go-gitea/gitea
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6913053223
Before:
* `{{.locale.Tr ...}}`
* `{{$.locale.Tr ...}}`
* `{{$.root.locale.Tr ...}}`
* `{{template "sub" .}}`
* `{{template "sub" (dict "locale" $.locale)}}`
* `{{template "sub" (dict "root" $)}}`
* .....
With context function: only need to `{{ctx.Locale.Tr ...}}`
The "ctx" could be considered as a super-global variable for all
templates including sub-templates.
To avoid potential risks (any bug in the template context function
package), this PR only starts using "ctx" in "head.tmpl" and
"footer.tmpl" and it has a "DataRaceCheck". If there is anything wrong,
the code can be fixed or reverted easily.
49 lines
1.3 KiB
Go
49 lines
1.3 KiB
Go
// Copyright 2023 The Gitea Authors. All rights reserved.
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// SPDX-License-Identifier: MIT
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package context
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import (
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"context"
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"errors"
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"time"
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"code.gitea.io/gitea/modules/log"
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)
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var _ context.Context = TemplateContext(nil)
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func NewTemplateContext(ctx context.Context) TemplateContext {
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return TemplateContext{"_ctx": ctx}
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}
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func (c TemplateContext) parentContext() context.Context {
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return c["_ctx"].(context.Context)
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}
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func (c TemplateContext) Deadline() (deadline time.Time, ok bool) {
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return c.parentContext().Deadline()
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}
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func (c TemplateContext) Done() <-chan struct{} {
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return c.parentContext().Done()
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}
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func (c TemplateContext) Err() error {
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return c.parentContext().Err()
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}
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func (c TemplateContext) Value(key any) any {
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return c.parentContext().Value(key)
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}
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// DataRaceCheck checks whether the template context function "ctx()" returns the consistent context
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// as the current template's rendering context (request context), to help to find data race issues as early as possible.
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// When the code is proven to be correct and stable, this function should be removed.
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func (c TemplateContext) DataRaceCheck(dataCtx context.Context) (string, error) {
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if c.parentContext() != dataCtx {
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log.Error("TemplateContext.DataRaceCheck: parent context mismatch\n%s", log.Stack(2))
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return "", errors.New("parent context mismatch")
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}
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return "", nil
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}
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