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Use a general approach to access custom/static/builtin assets (#24022)

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The idea is to use a Layered Asset File-system (modules/assetfs/layered.go)

For example: when there are 2 layers: "custom", "builtin", when access
to asset "my/page.tmpl", the Layered Asset File-system will first try to
use "custom" assets, if not found, then use "builtin" assets.

This approach will hugely simplify a lot of code, make them testable.

Other changes:

* Simplify the AssetsHandlerFunc code
* Simplify the `gitea embedded` sub-command code

---------

Co-authored-by: Jason Song <i@wolfogre.com>
Co-authored-by: Lunny Xiao <xiaolunwen@gmail.com>
This commit is contained in:
wxiaoguang
2023-04-12 18:16:45 +08:00
committed by GitHub
parent 42919ccb7c
commit 50a72e7a83
36 changed files with 689 additions and 1055 deletions
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63
modules/templates/mailer.go
View File

@@ -6,15 +6,12 @@ package templates
import (
"context"
"html/template"
"io/fs"
"os"
"strings"
texttmpl "text/template"
"code.gitea.io/gitea/modules/base"
"code.gitea.io/gitea/modules/log"
"code.gitea.io/gitea/modules/setting"
"code.gitea.io/gitea/modules/watcher"
)
// mailSubjectTextFuncMap returns functions for injecting to text templates, it's only used for mail subject
@@ -62,54 +59,23 @@ func Mailer(ctx context.Context) (*texttmpl.Template, *template.Template) {
bodyTemplates.Funcs(funcs)
}
assetFS := AssetFS()
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)
assetPaths, err := ListMailTemplateAssetNames(assetFS)
if err != nil {
log.Error("Failed to list mail templates: %v", err)
return
}
if err := walkMailerTemplates(func(path, name string, d fs.DirEntry, err error) error {
for _, assetPath := range assetPaths {
content, layerName, err := assetFS.ReadLayeredFile(assetPath)
if err != nil {
return err
log.Warn("Failed to read mail template %s by %s: %v", assetPath, layerName, err)
continue
}
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)
tmplName := strings.TrimPrefix(strings.TrimSuffix(assetPath, ".tmpl"), "mail/")
log.Trace("Adding mail template %s: %s by %s", tmplName, assetPath, layerName)
buildSubjectBodyTemplate(subjectTemplates, bodyTemplates, tmplName, content)
}
}
@@ -118,10 +84,7 @@ func Mailer(ctx context.Context) (*texttmpl.Template, *template.Template) {
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,
})
go assetFS.WatchLocalChanges(ctx, refreshTemplates)
}
return subjectTemplates, bodyTemplates