From 2a4c795d5a165f995e9f7dc84e07465b140f3770 Mon Sep 17 00:00:00 2001 From: Alan Pearce Date: Sat, 27 Apr 2024 21:18:03 +0200 Subject: implement live-reloading dev server Squashed commit of the following: commit 02f077432202af4d633eb2cad81dfdaa6921317f Author: Alan Pearce Date: Sat Apr 27 21:09:14 2024 +0200 builder: only remove output directory if set and in dev mode commit 47001e01c55fa6e74aafeda04ebc3e4e7c47eba0 Author: Alan Pearce Date: Sat Apr 27 21:03:37 2024 +0200 implement live reload on dev server commit 411ec969f61e4b73439f1c54ea29f75135ecc618 Author: Alan Pearce Date: Sat Apr 27 20:59:26 2024 +0200 server: implement graceful shutdown commit 5400132eb6eb1b638e0b3fd4265f51611c92d473 Author: Alan Pearce Date: Sat Apr 27 20:41:07 2024 +0200 add some debug logs commit 3c9b678197c044603950232d222f501ef74d7873 Author: Alan Pearce Date: Sat Apr 27 20:39:09 2024 +0200 prefix log output with executable name commit 300e24c179e390e9d3f5aeab4471c97f17f1fa64 Author: Alan Pearce Date: Sat Apr 27 20:29:42 2024 +0200 don't panic inside internal packages, return error instead commit fe2715d330402ad67fe866471bed89c7238ad2ec Author: Alan Pearce Date: Fri Apr 26 01:18:29 2024 +0200 config: use a table to configure CSP headers commit d012553aaf78a436fa8871830b5d720a9e292d4b Author: Alan Pearce Date: Thu Apr 25 17:13:39 2024 +0200 dev: create basic dev server to build and serve from a temporary directory commit a1d11d3e69650d9b43ca1b1d7b7ccc05a808d5c1 Author: Alan Pearce Date: Thu Apr 25 13:02:22 2024 +0200 remove unused redirect_other_hostnames config option commit fd67b19b5c7f76f0c3579e8a05ef20a618e90be7 Author: Alan Pearce Date: Thu Apr 25 12:58:53 2024 +0200 server: make port a string, which is what go uses commit c798e8e736c0649008cade337158399470a9099b Author: Alan Pearce Date: Thu Apr 25 12:58:33 2024 +0200 config: remove unused port variable commit f94882b9001f3b0855e26b26b4a84b96e3deb22b Author: Alan Pearce Date: Thu Apr 25 12:49:10 2024 +0200 re-organise module layout --- internal/builder/posts.go | 121 ++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 121 insertions(+) create mode 100644 internal/builder/posts.go (limited to 'internal/builder/posts.go') diff --git a/internal/builder/posts.go b/internal/builder/posts.go new file mode 100644 index 0000000..223531b --- /dev/null +++ b/internal/builder/posts.go @@ -0,0 +1,121 @@ +package builder + +import ( + "bytes" + "log/slog" + "os" + "path" + "path/filepath" + "slices" + "strings" + "time" + + "github.com/adrg/frontmatter" + mapset "github.com/deckarep/golang-set/v2" + "github.com/pkg/errors" + "github.com/yuin/goldmark" + "github.com/yuin/goldmark/extension" + htmlrenderer "github.com/yuin/goldmark/renderer/html" +) + +type PostMatter struct { + Date time.Time `toml:"date"` + Description string `toml:"description"` + Title string `toml:"title"` + Taxonomies struct { + Tags []string `toml:"tags"` + } `toml:"taxonomies"` +} + +type Post struct { + Input string + Output string + Basename string + URL string + Content string + PostMatter +} + +type Tags mapset.Set[string] + +var markdown = goldmark.New( + goldmark.WithRendererOptions( + htmlrenderer.WithUnsafe(), + ), + goldmark.WithExtensions( + extension.GFM, + extension.Footnote, + extension.Typographer, + ), +) + +func getPost(filename string) (*PostMatter, []byte, error) { + matter := PostMatter{} + content, err := os.Open(filename) + defer content.Close() + if err != nil { + return nil, nil, errors.WithMessagef(err, "could not open post %s", filename) + } + rest, err := frontmatter.MustParse(content, &matter) + if err != nil { + return nil, nil, errors.WithMessagef(err, "could not parse front matter of post %s", filename) + } + + return &matter, rest, nil +} + +func renderMarkdown(content []byte) (string, error) { + var buf bytes.Buffer + if err := markdown.Convert(content, &buf); err != nil { + return "", errors.WithMessage(err, "could not convert markdown content") + } + return buf.String(), nil +} + +func readPosts(root string, inputDir string, outputDir string) ([]Post, Tags, error) { + tags := mapset.NewSet[string]() + posts := []Post{} + subdir := filepath.Join(root, inputDir) + files, err := os.ReadDir(subdir) + if err != nil { + return nil, nil, errors.WithMessagef(err, "could not read post directory %s", subdir) + } + outputReplacer := strings.NewReplacer(root, outputDir, ".md", "/index.html") + urlReplacer := strings.NewReplacer(root, "", ".md", "/") + for _, f := range files { + pathFromRoot := filepath.Join(subdir, f.Name()) + if !f.IsDir() && path.Ext(pathFromRoot) == ".md" { + output := outputReplacer.Replace(pathFromRoot) + url := urlReplacer.Replace(pathFromRoot) + slog.Debug("reading post", "post", pathFromRoot) + matter, content, err := getPost(pathFromRoot) + if err != nil { + return nil, nil, err + } + + for _, tag := range matter.Taxonomies.Tags { + tags.Add(strings.ToLower(tag)) + } + + slog.Debug("rendering markdown in post", "post", pathFromRoot) + html, err := renderMarkdown(content) + if err != nil { + return nil, nil, err + } + post := Post{ + Input: pathFromRoot, + Output: output, + Basename: filepath.Base(url), + URL: url, + PostMatter: *matter, + Content: html, + } + + posts = append(posts, post) + } + } + slices.SortFunc(posts, func(a, b Post) int { + return b.Date.Compare(a.Date) + }) + return posts, tags, nil +} -- cgit 1.4.1