mirror of
https://github.com/gohugoio/hugo.git
synced 2024-11-21 20:46:30 -05:00
281 lines
7.1 KiB
Go
281 lines
7.1 KiB
Go
// Copyright 2019 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 page_generate
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import (
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"bytes"
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"fmt"
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"os"
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"path/filepath"
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"reflect"
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"github.com/pkg/errors"
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"github.com/gohugoio/hugo/common/maps"
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"github.com/gohugoio/hugo/codegen"
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"github.com/gohugoio/hugo/resources/page"
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"github.com/gohugoio/hugo/source"
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)
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const header = `// Copyright 2019 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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// This file is autogenerated.
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`
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var (
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fileInterfaceDeprecated = reflect.TypeOf((*source.FileWithoutOverlap)(nil)).Elem()
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pageInterfaceDeprecated = reflect.TypeOf((*page.DeprecatedWarningPageMethods)(nil)).Elem()
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pageInterface = reflect.TypeOf((*page.Page)(nil)).Elem()
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packageDir = filepath.FromSlash("resources/page")
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)
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func Generate(c *codegen.Inspector) error {
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if err := generateMarshalJSON(c); err != nil {
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return errors.Wrap(err, "failed to generate JSON marshaler")
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}
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if err := generateDeprecatedWrappers(c); err != nil {
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return errors.Wrap(err, "failed to generate deprecate wrappers")
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}
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if err := generateFileIsZeroWrappers(c); err != nil {
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return errors.Wrap(err, "failed to generate file wrappers")
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}
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return nil
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}
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func generateMarshalJSON(c *codegen.Inspector) error {
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filename := filepath.Join(c.ProjectRootDir, packageDir, "page_marshaljson.autogen.go")
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f, err := os.Create(filename)
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if err != nil {
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return err
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}
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defer f.Close()
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includes := []reflect.Type{pageInterface}
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// Exclude these methods
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excludes := []reflect.Type{
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// We need to evaluate the deprecated vs JSON in the future,
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// but leave them out for now.
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pageInterfaceDeprecated,
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// Leave this out for now. We need to revisit the author issue.
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reflect.TypeOf((*page.AuthorProvider)(nil)).Elem(),
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// navigation.PageMenus
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// Prevent loops.
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reflect.TypeOf((*page.SitesProvider)(nil)).Elem(),
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reflect.TypeOf((*page.Positioner)(nil)).Elem(),
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reflect.TypeOf((*page.ChildCareProvider)(nil)).Elem(),
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reflect.TypeOf((*page.TreeProvider)(nil)).Elem(),
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reflect.TypeOf((*page.InSectionPositioner)(nil)).Elem(),
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reflect.TypeOf((*page.PaginatorProvider)(nil)).Elem(),
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reflect.TypeOf((*maps.Scratcher)(nil)).Elem(),
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}
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methods := c.MethodsFromTypes(
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includes,
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excludes)
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if len(methods) == 0 {
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return errors.New("no methods found")
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}
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marshalJSON, pkgImports := methods.ToMarshalJSON(
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"Page",
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"github.com/gohugoio/hugo/resources/page",
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// Exclusion regexps. Matches method names.
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`\bPage\b`,
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)
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fmt.Fprintf(f, `%s
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package page
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%s
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%s
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`, header, importsString(pkgImports), marshalJSON)
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return nil
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}
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func generateDeprecatedWrappers(c *codegen.Inspector) error {
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filename := filepath.Join(c.ProjectRootDir, packageDir, "page_wrappers.autogen.go")
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f, err := os.Create(filename)
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if err != nil {
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return err
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}
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defer f.Close()
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// Generate a wrapper for deprecated page methods
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reasons := map[string]string{
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"IsDraft": "Use .Draft.",
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"Hugo": "Use the global hugo function.",
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"LanguagePrefix": "Use .Site.LanguagePrefix.",
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"GetParam": "Use .Param or .Params.myParam.",
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"RSSLink": `Use the Output Format's link, e.g. something like:
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{{ with .OutputFormats.Get "RSS" }}{{ .RelPermalink }}{{ end }}`,
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"URL": "Use .Permalink or .RelPermalink. If what you want is the front matter URL value, use .Params.url",
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}
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deprecated := func(name string, tp reflect.Type) string {
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var alternative string
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if tp == fileInterfaceDeprecated {
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alternative = "Use .File." + name
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} else {
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var found bool
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alternative, found = reasons[name]
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if !found {
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panic(fmt.Sprintf("no deprecated reason found for %q", name))
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}
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}
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return fmt.Sprintf("helpers.Deprecated(%q, %q, false)", "Page."+name, alternative)
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}
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var buff bytes.Buffer
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methods := c.MethodsFromTypes([]reflect.Type{fileInterfaceDeprecated, pageInterfaceDeprecated}, nil)
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for _, m := range methods {
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fmt.Fprint(&buff, m.Declaration("*pageDeprecated"))
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fmt.Fprintln(&buff, " {")
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fmt.Fprintf(&buff, "\t%s\n", deprecated(m.Name, m.Owner))
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fmt.Fprintf(&buff, "\t%s\n}\n", m.Delegate("p", "p"))
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}
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pkgImports := append(methods.Imports(), "github.com/gohugoio/hugo/helpers")
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fmt.Fprintf(f, `%s
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package page
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%s
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// NewDeprecatedWarningPage adds deprecation warnings to the given implementation.
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func NewDeprecatedWarningPage(p DeprecatedWarningPageMethods) DeprecatedWarningPageMethods {
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return &pageDeprecated{p: p}
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}
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type pageDeprecated struct {
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p DeprecatedWarningPageMethods
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}
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%s
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`, header, importsString(pkgImports), buff.String())
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return nil
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}
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func generateFileIsZeroWrappers(c *codegen.Inspector) error {
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filename := filepath.Join(c.ProjectRootDir, packageDir, "zero_file.autogen.go")
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f, err := os.Create(filename)
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if err != nil {
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return err
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}
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defer f.Close()
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// Generate warnings for zero file access
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warning := func(name string, tp reflect.Type) string {
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msg := fmt.Sprintf(".File.%s on zero object. Wrap it in if or with: {{ with .File }}{{ .%s }}{{ end }}", name, name)
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return fmt.Sprintf("z.log.Println(%q)", msg)
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}
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var buff bytes.Buffer
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methods := c.MethodsFromTypes([]reflect.Type{reflect.TypeOf((*source.File)(nil)).Elem()}, nil)
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for _, m := range methods {
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if m.Name == "IsZero" {
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continue
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}
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fmt.Fprint(&buff, m.DeclarationNamed("zeroFile"))
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fmt.Fprintln(&buff, " {")
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fmt.Fprintf(&buff, "\t%s\n", warning(m.Name, m.Owner))
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if len(m.Out) > 0 {
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fmt.Fprintln(&buff, "\treturn")
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}
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fmt.Fprintln(&buff, "}")
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}
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pkgImports := append(methods.Imports(), "github.com/gohugoio/hugo/common/loggers", "github.com/gohugoio/hugo/source")
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fmt.Fprintf(f, `%s
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package page
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%s
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// ZeroFile represents a zero value of source.File with warnings if invoked.
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type zeroFile struct {
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log loggers.Logger
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}
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func NewZeroFile(log loggers.Logger) source.File {
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return zeroFile{log: log}
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}
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func (zeroFile) IsZero() bool {
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return true
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}
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%s
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`, header, importsString(pkgImports), buff.String())
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return nil
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}
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func importsString(imps []string) string {
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if len(imps) == 0 {
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return ""
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}
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if len(imps) == 1 {
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return fmt.Sprintf("import %q", imps[0])
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}
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impsStr := "import (\n"
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for _, imp := range imps {
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impsStr += fmt.Sprintf("%q\n", imp)
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}
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return impsStr + ")"
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}
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