deno-export-markdown-posts.ts

#!/usr/bin/env deno run

/**
 * Copy markdown posts from org folders to publishing folder
 *
 * Usage:
 * deno run --allow-read --allow-write deno-export-markdown-posts.ts ~/org/blogging/mattermind/ ~/github/crucialfelix.github.io/content/posts
 */

import { join } from "https://deno.land/std@0.122.0/path/mod.ts";

if (Deno.args.length !== 2) {
  console.error(
    "Usage: deno-export-markdown-posts.ts <input-dir> <output-dir>"
  );
  Deno.exit(1);
}

const [inputDir, outputDir] = Deno.args;

const dirEntries = Deno.readDirSync(inputDir);
const preExistingFiles = new Set(
  [...Deno.readDirSync(outputDir)].map((entry) => entry.name)
);

let numFiles = 0;
for (const dirEntry of dirEntries) {
  if (dirEntry.isFile && !dirEntry.name.startsWith("_")) {
    const filepath = join(inputDir, dirEntry.name);
    const file = Deno.readFileSync(filepath);
    const content = new TextDecoder("utf-8").decode(file);
    // replace internal links [[...]]
    const contentReplaced = content.replace(
      /\[\[([^\]]+)\]\]/g,
      (match, p1) => {
        return p1;
      }
    );
    // set all as draft
    // https://dotland-fresh.deno.dev/x/frontmatter@v0.1.4

    console.log("Saving", dirEntry.name);
    Deno.writeFileSync(
      join(outputDir, dirEntry.name),
      new TextEncoder().encode(contentReplaced)
    );
    numFiles++;
    preExistingFiles.delete(dirEntry.name);
  }
}

if (preExistingFiles.size > 0) {
  console.log("Removing previous files:", preExistingFiles);
  for (const file of preExistingFiles) {
    Deno.removeSync(join(outputDir, file));
  }
}

console.log("Copied", numFiles, "files to", outputDir);