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tpl/tplimpl: Handle late transformation of templates

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Fixes #5865
This commit is contained in:
Bjørn Erik Pedersen 2019-04-16 09:13:55 +02:00
parent 56550d1e44
commit 2957795f52
7 changed files with 150 additions and 62 deletions
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2
tpl/template.go
View file

@ -52,7 +52,7 @@ type TemplateHandler interface {
NewTextTemplate() TemplateParseFinder
MarkReady()
MarkReady() error
RebuildClone()
}

6
tpl/tplimpl/ace.go
View file

@ -53,15 +53,15 @@ func (t *templateHandler) addAceTemplate(name, basePath, innerPath string, baseC
typ := resolveTemplateType(name)
info, err := applyTemplateTransformersToHMLTTemplate(typ, templ)
c, err := applyTemplateTransformersToHMLTTemplate(typ, templ)
if err != nil {
return err
}
if typ == templateShortcode {
t.addShortcodeVariant(name, info, templ)
t.addShortcodeVariant(name, c.Info, templ)
} else {
t.templateInfo[name] = info
t.templateInfo[name] = c.Info
}
return nil

118
tpl/tplimpl/template.go
View file

@ -18,6 +18,7 @@ import (
"html/template"
"strings"
texttemplate "text/template"
"text/template/parse"
"github.com/gohugoio/hugo/hugofs"
"github.com/gohugoio/hugo/tpl/tplimpl/embedded"
@ -51,7 +52,6 @@ var (
_ tpl.TemplateFinder = (*textTemplates)(nil)
_ templateLoader = (*htmlTemplates)(nil)
_ templateLoader = (*textTemplates)(nil)
_ templateLoader = (*templateHandler)(nil)
_ templateFuncsterTemplater = (*htmlTemplates)(nil)
_ templateFuncsterTemplater = (*textTemplates)(nil)
)
@ -66,7 +66,7 @@ type templateErr struct {
type templateLoader interface {
handleMaster(name, overlayFilename, masterFilename string, onMissing func(filename string) (templateInfo, error)) error
addTemplate(name, tpl string) error
addTemplate(name, tpl string) (*templateContext, error)
addLateTemplate(name, tpl string) error
}
@ -329,6 +329,7 @@ func (t *templateHandler) clone(d *deps.Deps) *templateHandler {
func newTemplateAdapter(deps *deps.Deps) *templateHandler {
common := &templatesCommon{
nameBaseTemplateName: make(map[string]string),
transformNotFound: make(map[string]bool),
}
htmlT := &htmlTemplates{
@ -364,6 +365,10 @@ type templatesCommon struct {
// Used to get proper filenames in errors
nameBaseTemplateName map[string]string
// Holds names of the templates not found during the first AST transformation
// pass.
transformNotFound map[string]bool
}
type htmlTemplates struct {
mu sync.RWMutex
@ -491,37 +496,42 @@ func (t *templateHandler) LoadTemplates(prefix string) error {
}
func (t *htmlTemplates) addTemplateIn(tt *template.Template, name, tpl string) error {
func (t *htmlTemplates) addTemplateIn(tt *template.Template, name, tpl string) (*templateContext, error) {
t.mu.Lock()
defer t.mu.Unlock()
templ, err := tt.New(name).Parse(tpl)
if err != nil {
return err
return nil, err
}
typ := resolveTemplateType(name)
info, err := applyTemplateTransformersToHMLTTemplate(typ, templ)
c, err := applyTemplateTransformersToHMLTTemplate(typ, templ)
if err != nil {
return err
return nil, err
}
for k, _ := range c.notFound {
t.transformNotFound[k] = true
}
if typ == templateShortcode {
t.handler.addShortcodeVariant(name, info, templ)
t.handler.addShortcodeVariant(name, c.Info, templ)
} else {
t.handler.templateInfo[name] = info
t.handler.templateInfo[name] = c.Info
}
return nil
return c, nil
}
func (t *htmlTemplates) addTemplate(name, tpl string) error {
func (t *htmlTemplates) addTemplate(name, tpl string) (*templateContext, error) {
return t.addTemplateIn(t.t, name, tpl)
}
func (t *htmlTemplates) addLateTemplate(name, tpl string) error {
return t.addTemplateIn(t.clone, name, tpl)
_, err := t.addTemplateIn(t.clone, name, tpl)
return err
}
type textTemplate struct {
@ -556,41 +566,91 @@ func (t *textTemplate) parseIn(tt *texttemplate.Template, name, tpl string) (*te
return templ, nil
}
func (t *textTemplates) addTemplateIn(tt *texttemplate.Template, name, tpl string) error {
func (t *textTemplates) addTemplateIn(tt *texttemplate.Template, name, tpl string) (*templateContext, error) {
name = strings.TrimPrefix(name, textTmplNamePrefix)
templ, err := t.parseIn(tt, name, tpl)
if err != nil {
return err
return nil, err
}
typ := resolveTemplateType(name)
info, err := applyTemplateTransformersToTextTemplate(typ, templ)
c, err := applyTemplateTransformersToTextTemplate(typ, templ)
if err != nil {
return err
return nil, err
}
for k, _ := range c.notFound {
t.transformNotFound[k] = true
}
if typ == templateShortcode {
t.handler.addShortcodeVariant(name, info, templ)
t.handler.addShortcodeVariant(name, c.Info, templ)
} else {
t.handler.templateInfo[name] = info
t.handler.templateInfo[name] = c.Info
}
return nil
return c, nil
}
func (t *textTemplates) addTemplate(name, tpl string) error {
func (t *textTemplates) addTemplate(name, tpl string) (*templateContext, error) {
return t.addTemplateIn(t.t, name, tpl)
}
func (t *textTemplates) addLateTemplate(name, tpl string) error {
return t.addTemplateIn(t.clone, name, tpl)
_, err := t.addTemplateIn(t.clone, name, tpl)
return err
}
func (t *templateHandler) addTemplate(name, tpl string) error {
return t.AddTemplate(name, tpl)
}
func (t *templateHandler) postTransform() error {
if len(t.html.transformNotFound) == 0 && len(t.text.transformNotFound) == 0 {
return nil
}
defer func() {
t.text.transformNotFound = make(map[string]bool)
t.html.transformNotFound = make(map[string]bool)
}()
for _, s := range []struct {
lookup func(name string) *parse.Tree
transformNotFound map[string]bool
}{
// html templates
{func(name string) *parse.Tree {
templ := t.html.lookup(name)
if templ == nil {
return nil
}
return templ.Tree
}, t.html.transformNotFound},
// text templates
{func(name string) *parse.Tree {
templT := t.text.lookup(name)
if templT == nil {
return nil
}
return templT.Tree
}, t.text.transformNotFound},
} {
for name, _ := range s.transformNotFound {
templ := s.lookup(name)
if templ != nil {
_, err := applyTemplateTransformers(templateUndefined, templ, s.lookup)
if err != nil {
return err
}
}
}
}
return nil
}
func (t *templateHandler) addLateTemplate(name, tpl string) error {
return t.AddLateTemplate(name, tpl)
}
@ -608,9 +668,11 @@ func (t *templateHandler) AddLateTemplate(name, tpl string) error {
// AddTemplate parses and adds a template to the collection.
// Templates with name prefixed with "_text" will be handled as plain
// text templates.
// TODO(bep) clean up these addTemplate variants
func (t *templateHandler) AddTemplate(name, tpl string) error {
h := t.getTemplateHandler(name)
if err := h.addTemplate(name, tpl); err != nil {
_, err := h.addTemplate(name, tpl)
if err != nil {
return err
}
return nil
@ -620,7 +682,11 @@ func (t *templateHandler) AddTemplate(name, tpl string) error {
// after this is set.
// TODO(bep) if this proves to be resource heavy, we could detect
// earlier if we really need this, or make it lazy.
func (t *templateHandler) MarkReady() {
func (t *templateHandler) MarkReady() error {
if err := t.postTransform(); err != nil {
return err
}
if t.html.clone == nil {
t.html.clone = template.Must(t.html.t.Clone())
t.html.cloneClone = template.Must(t.html.clone.Clone())
@ -629,6 +695,8 @@ func (t *templateHandler) MarkReady() {
t.text.clone = texttemplate.Must(t.text.t.Clone())
t.text.cloneClone = texttemplate.Must(t.text.clone.Clone())
}
return nil
}
// RebuildClone rebuilds the cloned templates. Used for live-reloads.
@ -890,15 +958,15 @@ func (t *templateHandler) addTemplateFile(name, baseTemplatePath, path string) e
typ := resolveTemplateType(name)
info, err := applyTemplateTransformersToHMLTTemplate(typ, templ)
c, err := applyTemplateTransformersToHMLTTemplate(typ, templ)
if err != nil {
return err
}
if typ == templateShortcode {
t.addShortcodeVariant(templateName, info, templ)
t.addShortcodeVariant(templateName, c.Info, templ)
} else {
t.templateInfo[name] = info
t.templateInfo[name] = c.Info
}
return nil

7
tpl/tplimpl/templateProvider.go
View file

@ -46,9 +46,7 @@ func (*TemplateProvider) Update(deps *deps.Deps) error {
}
newTmpl.MarkReady()
return nil
return newTmpl.MarkReady()
}
@ -60,7 +58,6 @@ func (*TemplateProvider) Clone(d *deps.Deps) error {
d.Tmpl = clone
clone.MarkReady()
return clone.MarkReady()
return nil
}

25
tpl/tplimpl/template_ast_transformers.go
View file

@ -50,6 +50,7 @@ const (
type templateContext struct {
decl decl
visited map[string]bool
notFound map[string]bool
lookupFn func(name string) *parse.Tree
// The last error encountered.
@ -72,7 +73,15 @@ func (c templateContext) getIfNotVisited(name string) *parse.Tree {
return nil
}
c.visited[name] = true
return c.lookupFn(name)
templ := c.lookupFn(name)
if templ == nil {
// This may be a inline template defined outside of this file
// and not yet parsed. Unusual, but it happens.
// Store the name to try again later.
c.notFound[name] = true
}
return templ
}
func newTemplateContext(lookupFn func(name string) *parse.Tree) *templateContext {
@ -80,8 +89,8 @@ func newTemplateContext(lookupFn func(name string) *parse.Tree) *templateContext
Info: tpl.Info{Config: tpl.DefaultConfig},
lookupFn: lookupFn,
decl: make(map[string]string),
visited: make(map[string]bool)}
visited: make(map[string]bool),
notFound: make(map[string]bool)}
}
func createParseTreeLookup(templ *template.Template) func(nn string) *parse.Tree {
@ -94,11 +103,11 @@ func createParseTreeLookup(templ *template.Template) func(nn string) *parse.Tree
}
}
func applyTemplateTransformersToHMLTTemplate(typ templateType, templ *template.Template) (tpl.Info, error) {
func applyTemplateTransformersToHMLTTemplate(typ templateType, templ *template.Template) (*templateContext, error) {
return applyTemplateTransformers(typ, templ.Tree, createParseTreeLookup(templ))
}
func applyTemplateTransformersToTextTemplate(typ templateType, templ *texttemplate.Template) (tpl.Info, error) {
func applyTemplateTransformersToTextTemplate(typ templateType, templ *texttemplate.Template) (*templateContext, error) {
return applyTemplateTransformers(typ, templ.Tree,
func(nn string) *parse.Tree {
tt := templ.Lookup(nn)
@ -109,9 +118,9 @@ func applyTemplateTransformersToTextTemplate(typ templateType, templ *texttempla
})
}
func applyTemplateTransformers(typ templateType, templ *parse.Tree, lookupFn func(name string) *parse.Tree) (tpl.Info, error) {
func applyTemplateTransformers(typ templateType, templ *parse.Tree, lookupFn func(name string) *parse.Tree) (*templateContext, error) {
if templ == nil {
return tpl.Info{}, errors.New("expected template, but none provided")
return nil, errors.New("expected template, but none provided")
}
c := newTemplateContext(lookupFn)
@ -125,7 +134,7 @@ func applyTemplateTransformers(typ templateType, templ *parse.Tree, lookupFn fun
templ.Root = c.wrapInPartialReturnWrapper(templ.Root)
}
return c.Info, err
return c, err
}
const (

50
tpl/tplimpl/template_ast_transformers_test.go
View file

@ -26,10 +26,6 @@ import (
"github.com/stretchr/testify/require"
)
type handler interface {
addTemplate(name, tpl string) error
}
var (
testFuncs = map[string]interface{}{
"getif": func(v interface{}) interface{} { return v },
@ -413,7 +409,7 @@ func TestInsertIsZeroFunc(t *testing.T) {
"T": &T{NonEmptyInterfaceTypedNil: (*T)(nil)},
}
templ = `
templ1 = `
{{ if .True }}.True: TRUE{{ else }}.True: FALSE{{ end }}
{{ if .TimeZero }}.TimeZero1: TRUE{{ else }}.TimeZero1: FALSE{{ end }}
{{ if (.TimeZero) }}.TimeZero2: TRUE{{ else }}.TimeZero2: FALSE{{ end }}
@ -423,31 +419,49 @@ func TestInsertIsZeroFunc(t *testing.T) {
{{ template "mytemplate" . }}
{{ if .T.NonEmptyInterfaceTypedNil }}.NonEmptyInterfaceTypedNil: TRUE{{ else }}.NonEmptyInterfaceTypedNil: FALSE{{ end }}
{{ template "other-file-template" . }}
{{ define "mytemplate" }}
{{ if .TimeZero }}.TimeZero1: mytemplate: TRUE{{ else }}.TimeZero1: mytemplate: FALSE{{ end }}
{{ end }}
`
// https://github.com/gohugoio/hugo/issues/5865
templ2 = `{{ define "other-file-template" }}
{{ if .TimeZero }}.TimeZero1: other-file-template: TRUE{{ else }}.TimeZero1: other-file-template: FALSE{{ end }}
{{ end }}
`
)
d := newD(assert)
h := d.Tmpl.(handler)
h := d.Tmpl.(tpl.TemplateHandler)
assert.NoError(h.addTemplate("mytemplate.html", templ))
// HTML templates
assert.NoError(h.AddTemplate("mytemplate.html", templ1))
assert.NoError(h.AddTemplate("othertemplate.html", templ2))
tt, _ := d.Tmpl.Lookup("mytemplate.html")
result, err := tt.(tpl.TemplateExecutor).ExecuteToString(ctx)
assert.NoError(err)
// Text templates
assert.NoError(h.AddTemplate("_text/mytexttemplate.txt", templ1))
assert.NoError(h.AddTemplate("_text/myothertexttemplate.txt", templ2))
assert.Contains(result, ".True: TRUE")
assert.Contains(result, ".TimeZero1: FALSE")
assert.Contains(result, ".TimeZero2: FALSE")
assert.Contains(result, ".TimeZero3: TRUE")
assert.Contains(result, ".Now: TRUE")
assert.Contains(result, "TimeZero1 with: FALSE")
assert.Contains(result, ".TimeZero1: mytemplate: FALSE")
assert.Contains(result, ".NonEmptyInterfaceTypedNil: FALSE")
assert.NoError(h.MarkReady())
for _, name := range []string{"mytemplate.html", "mytexttemplate.txt"} {
tt, _ := d.Tmpl.Lookup(name)
result, err := tt.(tpl.TemplateExecutor).ExecuteToString(ctx)
assert.NoError(err)
assert.Contains(result, ".True: TRUE")
assert.Contains(result, ".TimeZero1: FALSE")
assert.Contains(result, ".TimeZero2: FALSE")
assert.Contains(result, ".TimeZero3: TRUE")
assert.Contains(result, ".Now: TRUE")
assert.Contains(result, "TimeZero1 with: FALSE")
assert.Contains(result, ".TimeZero1: mytemplate: FALSE")
assert.Contains(result, ".TimeZero1: other-file-template: FALSE")
assert.Contains(result, ".NonEmptyInterfaceTypedNil: FALSE")
}
}

4
tpl/tplimpl/template_info_test.go
View file

@ -24,9 +24,9 @@ import (
func TestTemplateInfoShortcode(t *testing.T) {
assert := require.New(t)
d := newD(assert)
h := d.Tmpl.(handler)
h := d.Tmpl.(tpl.TemplateHandler)
assert.NoError(h.addTemplate("shortcodes/mytemplate.html", `
assert.NoError(h.AddTemplate("shortcodes/mytemplate.html", `
{{ .Inner }}
`))
tt, found, _ := d.Tmpl.LookupVariant("mytemplate", tpl.TemplateVariants{})