add package.json and other files

Signed-off-by: coolguy284 <coolguy284v64@gmail.com>

hash_backup.js

@@ -0,0 +1,109 @@
+// whether to check for file equality when hash compares equal
+let CHECK_HASH_COLLISION = true;
+
+let fs = require('fs');
+let path = require('path');
+
+async function getUserInput() {
+  let prompt = 'Choice (y/n, default n): ';
+  let choices = new Map([
+    ['y', true],
+    ['n', false],
+  ]);
+
+  let choice;
+  do {
+    process.stdout.write(prompt);
+    choice = choices.get(await new Promise(r => {
+      process.stdin.once('data', c => r(c.toString().trim()));
+    }));
+  } while (choice == null);
+
+  return choice;
+}
+
+async function getAllFilesInDir(path, excludeDirs) {
+  if (!Array.isArray(excludeDirs)) excludeDirs = [];
+
+  var entries = [];
+
+  return entries;
+}
+
+async function runIfMain() {
+  let argvSliced = process.argv.slice(2);
+
+  if (argvSliced.length == 0 || argvSliced[0] == '--help') {
+    console.log(
+      'Node Hash Backup Tool\n' +
+      '\n' +
+      'Usage: node hash_backup.js [command] [arguments]\n' +
+      '\n' +
+      'Command `init`:\n' +
+      '  Usage: node hash_backup.js init <backupDir>\n' +
+      '  Initalizes empty hash backup in backup dir\n' +
+      '\n' +
+      'Command `delete`:\n' +
+      '  Usage: node hash_backup.js delete <backupDir>\n' +
+      '  Removes hash backup at backup dir'
+    );
+  } else {
+    let commandArgs = argvSliced.slice(1);
+
+    switch (argvSliced[0]) {
+      case 'init': {
+        let backupDir = commandArgs[0];
+
+        if (backupDir == null || backupDir == '') backupDir = '.';
+
+        let backupDirStats;
+        try {
+          backupDirStats = await fs.promises.stat(backupDir);
+        } catch (e) {
+          if (e.code != 'ENOENT') throw e;
+        }
+
+        if (backupDirStats == null) {
+          console.log(`Error: ${backupDir} does not exist.`);
+          return;
+        }
+
+        if (!backupDirStats.isDirectory()) {
+          console.log(`Error: ${backupDir} not a directory.`);
+          return;
+        }
+
+        let backupDirContents = await fs.promises.readdir(backupDir, { withFileTypes: true });
+
+        if (backupDirContents.length != 0) {
+          console.log(
+            `Directory ${backupDir} is not empty, proceed anyway?\n` +
+            'WARNING: This will remove all files in the directory!'
+          );
+          let proceed = await getUserInput();
+          if (!proceed) return;
+
+          for (let backupDirContent of backupDirContents)
+            await fs.promises.rm(path.join(backupDir, backupDirContent.name), { recursive: true });
+        }
+
+        await fs.promises.mkdir(path.join(backupDir, 'files'));
+        break;
+      }
+
+      case 'delete':
+        break;
+    }
+  }
+}
+
+module.exports = exports = {
+  runIfMain,
+};
+
+if (require.main === module) {
+  (async () => {
+    await runIfMain();
+    process.exit();
+  })();
+}

package.json

@@ -0,0 +1,19 @@
+{
+  "name": "hash-backup",
+  "version": "0.0.0a",
+  "description": "A hash based incremental file backupper.",
+  "main": "hash_backup.js",
+  "scripts": {
+    "test": "echo \"Error: no test specified\" && exit 1"
+  },
+  "repository": {
+    "type": "git",
+    "url": "git+https://github.com/coolguy284/node-hash-backup.git"
+  },
+  "author": "coolguy284 <coolguy284v64@gmail.com> (https://github.com/coolguy284)",
+  "license": "ISC",
+  "bugs": {
+    "url": "https://github.com/coolguy284/node-hash-backup/issues"
+  },
+  "homepage": "https://github.com/coolguy284/node-hash-backup#readme"
+}