~kornellapacz/gmnigit

ref: 9cdc82885cf4286f621f8cb7f26c45aa4e513ad6 gmnigit/files.go -rw-r--r-- 2.9 KiB
9cdc8288Korneliusz Łapacz specify url by command line argument 6 months ago
                                                                                
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package main

import (
	"fmt"
	"io/fs"
	"io/ioutil"
	"log"
	"os"
	"path/filepath"
	"strings"

	gemini "git.tdem.in/tdemin/gmnhg"
	"github.com/gabriel-vasile/mimetype"
	"github.com/go-git/go-git/v5"
)

type fileType int

const (
	dir fileType = iota
	txt
	bin
)

func createLink(file fs.FileInfo, t fileType) string {
	var link, perm string

	switch t {
	case txt:
		link = "%s.txt%s %s"
	case dir:
		link = "%s/%s %s/"
	case bin:
		link = "%s%s %s"
	}

	if showPermissions {
		perm = " " + file.Mode().String()
	}

	return fmt.Sprintf("=> "+link+"\n", file.Name(), perm, file.Name())
}

func isBinary(detectedMIME *mimetype.MIME) bool {
	for mime := detectedMIME; mime != nil; mime = mime.Parent() {
		if mime.Is("text/plain") {
			return false
		}
	}

	return true
}

func arrangeDirectory(root, path string) {
	var indexContent string

	files, err := ioutil.ReadDir(filepath.Join(root, path))
	check(err)

	indexContent += fmt.Sprintf("# Tree\n\nPath: %s/\n\n", path)

	for _, file := range files {
		if file.IsDir() {
			indexContent += createLink(file, dir)
			arrangeDirectory(root, filepath.Join(path, file.Name()))
			continue
		}

		filePath := filepath.Join(root, path, file.Name())

		if file.Mode()&os.ModeSymlink != 0 {
			dest, err := os.Readlink(filePath)
			check(err)

			symlink, err := os.Create(filePath + ".txt")
			check(err)
			symlink.WriteString("symlink to: " + dest)

			check(symlink.Close())
			indexContent += createLink(file, txt)
			continue
		}

		detectedMIME, err := mimetype.DetectFile(filePath)
		check(err)

		if isBinary(detectedMIME) {
			indexContent += createLink(file, bin)
			continue
		}

		check(os.Rename(filePath, filePath+".txt"))
		indexContent += createLink(file, txt)
	}

	index, err := os.Create(filepath.Join(root, path, "index.gmi"))
	check(err)
	index.WriteString(indexContent)
	check(index.Close())
}

func createBrowsableTree() {
	treePath := filepath.Join(distPath, treeSubPath)

	_, err := git.PlainClone(treePath, false, &git.CloneOptions{
		URL: repositoryPath,
	})

	check(err)
	check(os.RemoveAll(filepath.Join(treePath, ".git")))

	arrangeDirectory(treePath, "")
}

func createIndexFile() {
	indexFile, err := os.Create(filepath.Join(distPath, "index.gmi"))
	check(err)

	if cloneURL != "" {
		indexFile.WriteString("```\ngit clone " + strings.TrimSpace(cloneURL) + "\n```\n\n")
	}

	indexFile.WriteString("=> " + commitsSubPath + "/\n")
	indexFile.WriteString("=> " + treeSubPath + "/\n\n")

	// convert README.md to gemini and write it to index.gmi in repository root
	text, err := os.ReadFile(filepath.Join(distPath, treeSubPath, "README.md.txt"))

	if err != nil {
		if os.IsNotExist(err) {
			log.Println("README.md not found in your repository")

			check(indexFile.Close())
			return
		}

		log.Fatal(err)
	}

	check(err)
	geminiContent, _, err := gemini.RenderMarkdown(text, gemini.WithMetadata)
	check(err)

	indexFile.Write(geminiContent)

	check(indexFile.Close())
}