148 lines
3.3 KiB
Go
148 lines
3.3 KiB
Go
package main
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import (
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"context"
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"fmt"
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"log"
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"os"
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"path/filepath"
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"strings"
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"text/template"
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"github.com/google/go-github/v58/github"
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"golang.org/x/oauth2"
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"golang.org/x/sync/errgroup"
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"github.com/make-go-great/netrc-go"
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)
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const (
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postFilesPath = "posts"
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templatePostPath = "templates/post.html"
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generatedPath = "docs"
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extHTML = ".html"
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netrcPath = "~/.netrc"
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netrcMachineGitHub = "github.com"
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)
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type templatePostData struct {
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Index string
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Body string
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}
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func main() {
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ctx := context.Background()
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// Cleanup generated path
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if err := os.RemoveAll(generatedPath); err != nil {
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log.Fatalln("Failed to remove all", generatedPath, err)
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}
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if err := os.MkdirAll(generatedPath, 0o777); err != nil {
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log.Fatalln("Failed to mkdir all", generatedPath)
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}
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// Read post files directory
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postFiles, err := os.ReadDir(postFilesPath)
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if err != nil {
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log.Fatalln("Failed to read dir", postFilesPath)
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}
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// Prepare template
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templatePostBytes, err := os.ReadFile(templatePostPath)
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if err != nil {
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log.Fatalln("Failed to read file", templatePostPath, err)
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}
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templatePost, err := template.New("post").Parse(string(templatePostBytes))
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if err != nil {
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log.Fatalln("Failed to parse template", err)
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}
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// Prepare GitHub
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netrcData, err := netrc.ParseFile(netrcPath)
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if err != nil {
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log.Fatalln("Failed to read file netrc", err)
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}
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var ghAccessToken string
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for _, machine := range netrcData.Machines {
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if machine.Name == netrcMachineGitHub {
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ghAccessToken = machine.Password
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break
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}
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}
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if ghAccessToken == "" {
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log.Fatalln("Empty GitHub token in netrc")
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}
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ghTokenSrc := oauth2.StaticTokenSource(
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&oauth2.Token{
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AccessToken: strings.TrimSpace(ghAccessToken),
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},
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)
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ghHTTPClient := oauth2.NewClient(ctx, ghTokenSrc)
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ghClient := github.NewClient(ghHTTPClient)
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eg := new(errgroup.Group)
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// Generate post files
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for _, postFile := range postFiles {
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if postFile.IsDir() {
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continue
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}
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postFilename := postFile.Name()
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eg.Go(func() error {
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// Prepare post file
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mdFilename := filepath.Join(postFilesPath, postFilename)
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mdFileBytes, err := os.ReadFile(mdFilename)
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if err != nil {
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return fmt.Errorf("os: failed to read file %s: %w", mdFilename, err)
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}
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ghMarkdown, _, err := ghClient.Markdown.Render(ctx, string(mdFileBytes), nil)
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if err != nil {
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return fmt.Errorf("github: failed to markdown: %w", err)
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}
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// Prepare html file
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htmlFilename := strings.TrimSuffix(postFilename, filepath.Ext(postFilename)) + extHTML
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htmlFilepath := filepath.Join(generatedPath, htmlFilename)
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htmlFile, err := os.OpenFile(htmlFilepath, os.O_RDWR|os.O_CREATE, 0o600)
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if err != nil {
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return fmt.Errorf("os: failed to open file %s: %w", htmlFilepath, err)
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}
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defer htmlFile.Close()
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// Ignore index in index file
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indexHTML := `<h2><a href="index.html"><code>~</code></a></h2>`
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if strings.Contains(postFilename, "index") {
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indexHTML = ""
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}
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if err := templatePost.Execute(htmlFile, templatePostData{
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Index: indexHTML,
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Body: ghMarkdown,
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}); err != nil {
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return fmt.Errorf("template: failed to execute: %w", err)
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}
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return nil
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})
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}
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// Wait for all HTTP fetches to complete.
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if err := eg.Wait(); err != nil {
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log.Fatalln("I am sorry :(", err)
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} else {
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log.Println("Build successfully. Are you happy now?")
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}
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}
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