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forgejo/modules/templates/mailer.go
zeripath bb0ff77e46
Share HTML template renderers and create a watcher framework (#20218)
The recovery, API, Web and package frameworks all create their own HTML
Renderers. This increases the memory requirements of Gitea
unnecessarily with duplicate templates being kept in memory.

Further the reloading framework in dev mode for these involves locking
and recompiling all of the templates on each load. This will potentially
hide concurrency issues and it is inefficient.

This PR stores the templates renderer in the context and stores this
context in the NormalRoutes, it then creates a fsnotify.Watcher
framework to watch files.

The watching framework is then extended to the mailer templates which
were previously not being reloaded in dev.

Then the locales are simplified to a similar structure.

Fix #20210 
Fix #20211
Fix #20217

Signed-off-by: Andrew Thornton <art27@cantab.net>
2022-08-28 10:43:25 +01:00

92 lines
2.3 KiB
Go

// Copyright 2022 The Gitea Authors. All rights reserved.
// Use of this source code is governed by a MIT-style
// license that can be found in the LICENSE file.
package templates
import (
"context"
"html/template"
"io/fs"
"os"
"strings"
texttmpl "text/template"
"code.gitea.io/gitea/modules/log"
"code.gitea.io/gitea/modules/setting"
"code.gitea.io/gitea/modules/watcher"
)
// Mailer provides the templates required for sending notification mails.
func Mailer(ctx context.Context) (*texttmpl.Template, *template.Template) {
for _, funcs := range NewTextFuncMap() {
subjectTemplates.Funcs(funcs)
}
for _, funcs := range NewFuncMap() {
bodyTemplates.Funcs(funcs)
}
refreshTemplates := func() {
for _, assetPath := range BuiltinAssetNames() {
if !strings.HasPrefix(assetPath, "mail/") {
continue
}
if !strings.HasSuffix(assetPath, ".tmpl") {
continue
}
content, err := BuiltinAsset(assetPath)
if err != nil {
log.Warn("Failed to read embedded %s template. %v", assetPath, err)
continue
}
assetName := strings.TrimPrefix(strings.TrimSuffix(assetPath, ".tmpl"), "mail/")
log.Trace("Adding built-in mailer template for %s", assetName)
buildSubjectBodyTemplate(subjectTemplates,
bodyTemplates,
assetName,
content)
}
if err := walkMailerTemplates(func(path, name string, d fs.DirEntry, err error) error {
if err != nil {
return err
}
if d.IsDir() {
return nil
}
content, err := os.ReadFile(path)
if err != nil {
log.Warn("Failed to read custom %s template. %v", path, err)
return nil
}
assetName := strings.TrimSuffix(name, ".tmpl")
log.Trace("Adding mailer template for %s from %q", assetName, path)
buildSubjectBodyTemplate(subjectTemplates,
bodyTemplates,
assetName,
content)
return nil
}); err != nil && !os.IsNotExist(err) {
log.Warn("Error whilst walking mailer templates directories. %v", err)
}
}
refreshTemplates()
if !setting.IsProd {
// Now subjectTemplates and bodyTemplates are both synchronized
// thus it is safe to call refresh from a different goroutine
watcher.CreateWatcher(ctx, "Mailer Templates", &watcher.CreateWatcherOpts{
PathsCallback: walkMailerTemplates,
BetweenCallback: refreshTemplates,
})
}
return subjectTemplates, bodyTemplates
}