/
build.go
257 lines (218 loc) · 6.43 KB
/
build.go
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package egen
import (
"bytes"
"errors"
"fmt"
"html/template"
"os"
"path"
"github.com/alecthomas/chroma"
chromaHTML "github.com/alecthomas/chroma/formatters/html"
"github.com/alecthomas/chroma/styles"
)
// BuildConfig is the config used to build a blog.
type BuildConfig struct {
InPath, OutPath string
TemplateFuncs template.FuncMap
ChromaStyle *chroma.Style
}
// Build builds the blog.
func Build(bc BuildConfig) error {
if bc.InPath == "" {
return errors.New("InPath not provided")
}
if bc.OutPath == "" {
return errors.New("OutPath not provided")
}
// deletes bc.OutPath if it already exists
if _, err := os.Stat(bc.OutPath); err != nil {
if !os.IsNotExist(err) {
return err
}
} else {
err := os.RemoveAll(bc.OutPath)
if err != nil {
return fmt.Errorf("removing %v and its contents: %v", bc.OutPath, err)
}
}
// creates bc.OutPath
err := os.Mkdir(bc.OutPath, os.ModeDir|os.ModePerm)
if err != nil {
return err
}
// config file
c, err := readConfigFile(bc.InPath)
if err != nil {
return err
}
// assets in
assetsPath := path.Join(bc.InPath, "assets")
gat, err := generateAssetsTree(assetsPath, nil)
if err != nil {
return fmt.Errorf("reading %v: %v", assetsPath, err)
}
// chroma styles
var chromaStylesBuff bytes.Buffer
if bc.ChromaStyle == nil {
bc.ChromaStyle = styles.Get("swapoff")
}
if err := chromaHTML.New().WriteCSS(&chromaStylesBuff, bc.ChromaStyle); err != nil {
return err
}
chromaNode := gat.addChild(FILENODE, "chroma.css")
chromaNode.setContent(chromaStylesBuff.Bytes())
// assets out
assetsOutPath := path.Join(bc.OutPath, "assets")
err = os.Mkdir(assetsOutPath, os.ModeDir|os.ModePerm)
if err != nil {
return fmt.Errorf("creating %v: %v", assetsOutPath, err)
}
// process gat
err = gat.processCSSFileNodes()
if err != nil {
return err
}
err = gat.process(assetsOutPath, false)
if err != nil {
return err
}
// posts
postsLists, err := generatePostsLists(
generatePostsListsInput{
bc: &bc,
c: c,
gat: gat,
assetsOutPath: assetsOutPath,
},
)
if err != nil {
return err
}
// base template
baseTemplate, err := createBaseTemplateWithIncludes(
bc.TemplateFuncs,
path.Join(bc.InPath, "includes"),
postsLists.invisiblePostsByLangTag,
gat,
c.URL,
c.ResponsiveImgSizes,
)
if err != nil {
return err
}
pagesInPath := path.Join(bc.InPath, "pages")
// home page
homePageTemplate, err := createPageTemplate(pagesInPath, baseTemplate, "home")
if err != nil {
return err
}
// post page
postPageTemplate, err := createPageTemplate(pagesInPath, baseTemplate, "post")
if err != nil {
return err
}
// 404 page
notFoundPageTemplate, err := createPageTemplate(pagesInPath, baseTemplate, "404")
if err != nil {
return err
}
// executing templates per lang
for _, l := range c.Langs {
langOutPath := bc.OutPath
if !l.Default {
langOutPath = path.Join(langOutPath, l.Tag)
if err := os.Mkdir(langOutPath, os.ModeDir|os.ModePerm); err != nil {
return err
}
}
// home page
homePageTemplateData := TemplateData{
Posts: postsLists.visiblePostsByLangTag[l.Tag],
Lang: l,
Author: c.Author,
Color: c.Color,
ResponsiveImgMediaQueries: c.ResponsiveImgMediaQueries,
Title: c.Title,
Description: c.Description[l.Tag],
Page: "home",
Img: c.defaultImgByLangTag[l.Tag],
}
homePageTemplateData.AlternateLinks = generateAlternateLinks(nil, nil, c.Langs)
if l.Default {
homePageTemplateData.URL = "/"
} else {
homePageTemplateData.URL = "/" + l.Tag
}
err := executeMinifyAndWriteTemplate(homePageTemplate, homePageTemplateData, path.Join(langOutPath, "index.html"))
if err != nil {
return err
}
// 404 page
// only execute the 404 page's template if it's the default language.
if l.Default {
notFoundPageTemplateData := TemplateData{
Color: c.Color,
Author: c.Author,
Description: c.Description[l.Tag],
Img: c.defaultImgByLangTag[l.Tag],
Lang: l,
Page: "404",
Posts: postsLists.visiblePostsByLangTag[l.Tag],
Title: fmt.Sprintf("Not found - %v", c.Title),
ResponsiveImgMediaQueries: c.ResponsiveImgMediaQueries,
URL: "/404.html",
}
err := executeMinifyAndWriteTemplate(notFoundPageTemplate, notFoundPageTemplateData, path.Join(langOutPath, "404.html"))
if err != nil {
return err
}
}
// post page
if len(postsLists.visiblePostsByLangTag) > 0 || len(postsLists.invisiblePostsByLangTag) > 0 {
postsDirOutPath := path.Join(langOutPath, "posts")
err = os.Mkdir(postsDirOutPath, os.ModeDir|os.ModePerm)
if err != nil {
return err
}
for _, p := range postsLists.allPostsByLangTag[l.Tag] {
postDirPath := path.Join(postsDirOutPath, p.Slug)
err := os.Mkdir(postDirPath, os.ModeDir|os.ModePerm)
if err != nil {
return err
}
postPageTemplateData := TemplateData{
Title: fmt.Sprintf("%v - %v", p.Title, c.Title),
Description: p.Excerpt,
Page: "post",
Color: c.Color,
Post: p,
Lang: l,
Author: c.Author,
ResponsiveImgMediaQueries: c.ResponsiveImgMediaQueries,
Posts: postsLists.visiblePostsByLangTag[l.Tag],
}
postPageTemplateData.AlternateLinks = generateAlternateLinks(nil, []string{"posts", p.Slug}, c.Langs)
if l.Default {
postPageTemplateData.URL = "/posts/" + p.Slug
} else {
postPageTemplateData.URL = "/" + l.Tag + "/posts/" + p.Slug
}
if p.Img != nil {
postPageTemplateData.Img = p.Img
} else {
postPageTemplateData.Img = c.defaultImgByLangTag[l.Tag]
}
postPageTemplate.Funcs(map[string]interface{}{
"assetLink": generateAssetsLinkFn(gat, p.pat, p.Slug),
"srcSetValue": generateSrcSetValueFn(gat, p.pat, p.Slug, c.ResponsiveImgSizes),
"hasAsset": generateHasAsset(gat, p.pat, p.Slug),
})
err = executeMinifyAndWriteTemplate(postPageTemplate, postPageTemplateData, path.Join(postDirPath, "index.html"))
if err != nil {
return err
}
}
}
}
return nil
}