feat: read config, read history, hash files

most of the functionality exists now

index.js

@@ -1,3 +0,0 @@
-const mod = require('./src/index.js');
-
-module.exports = mod;

package.json

@@ -2,7 +2,10 @@
   "name": "pkgcomp",
   "version": "0.0.0",
   "description": "Node package compare and change runner",
-  "main": "index.js",
+  "bin": {
+    "pkgcomp": "src/cli.js"
+  },
+  "main": "src/index.js",
   "scripts": {
     "lint": "eslint '*.{js,mjs}' 'src/**/*.{js,mjs}'",
     "version": "npm-auto-version",
@@ -50,18 +53,22 @@
     "singleQuote": true,
     "trailingComma": "es5"
   },
-  "dependencies": {},
+  "dependencies": {
+    "joycon": "^2.2.4",
+    "md5-file": "^4.0.0",
+    "mkdirp": "^0.5.1"
+  },
   "devDependencies": {
     "@w33ble/npm-auto-tools": "*",
     "eslint": "^5.15.3",
+    "eslint-config-airbnb": "^17.1.0",
     "eslint-config-prettier": "^4.1.0",
     "eslint-plugin-import": "^2.14.0",
+    "eslint-plugin-jsx-a11y": "^6.1.1",
     "eslint-plugin-prettier": "^3.0.1",
+    "eslint-plugin-react": "^7.11.0",
     "husky": "^1.3.1",
     "lint-staged": "^8.1.4",
-    "eslint-config-airbnb": "^17.1.0",
-    "eslint-plugin-jsx-a11y": "^6.1.1",
-    "eslint-plugin-react": "^7.11.0",
     "prettier": "^1.16.4"
   }
 }

src/args.js

@@ -0,0 +1,13 @@
+module.exports = () => {
+  const args = process.argv.slice(2);
+
+  return args.reduce(
+    (acc, arg) => {
+      if (arg === '--verbose') acc.verbose = true;
+      return acc;
+    },
+    {
+      verbose: false,
+    }
+  );
+};

src/cli.js

@@ -0,0 +1,32 @@
+#!/usr/bin/env node
+
+const utils = require('./utils');
+const pkgcomp = require('./');
+
+function parseArgs() {
+  const args = process.argv.slice(2);
+
+  return args.reduce(
+    (acc, arg) => {
+      if (arg === '--verbose') acc.verbose = true;
+      if (arg === '--use-yarn') acc.useYarn = true;
+      return acc;
+    },
+    {
+      verbose: false,
+      useYarn: false,
+    }
+  );
+}
+
+function buildConfig(args) {
+  // build config object, mixing in CLI overrides
+  const configOverrides = {};
+  if (args.useYarn) configOverrides.cmd = 'yarn';
+  return Object.assign({}, utils.getConfig(), configOverrides);
+}
+
+// parse args from CLI
+const args = parseArgs();
+
+pkgcomp(buildConfig(args), utils.getIdent(), args);

src/data.js

@@ -0,0 +1,34 @@
+const fs = require('fs');
+const path = require('path');
+const mkdirp = require('mkdirp');
+
+const CONFIG_FILENAME = 'pkgcomp.json';
+
+exports.read = (fileRoot, ident) => {
+  const stats = fs.statSync(fileRoot);
+  const filePath = path.join(fileRoot, CONFIG_FILENAME);
+
+  // throw if pointing to a file
+  if (stats.isFile()) throw new Error(`getData expects a directory, got a file; ${fileRoot}`);
+
+  // create file if it's missing
+  if (!stats.isDirectory()) {
+    mkdirp.sync(fileRoot);
+  }
+
+  try {
+    const data = JSON.parse(fs.readFileSync(filePath));
+    return data[ident] || {};
+  } catch (err) {
+    if (err.code === 'ENOENT') {
+      fs.writeFileSync(filePath, JSON.stringify({}));
+      return {};
+    }
+    throw err;
+  }
+};
+
+exports.write = (fileRoot, ident, payload) => {
+  console.log('WRITE', { fileRoot, ident, payload });
+  throw new Error('Data write not implemented');
+};

src/index.js

@@ -1,3 +1,30 @@
-module.exports = function mod() {
+const md5File = require('md5-file');
-  // module code goes here
+const data = require('./data');
+// const utils = require('./utils');
+
+function getFileHash(file, verbose = false) {
+  try {
+    return md5File.sync(file);
+  } catch (e) {
+    // eslint-disable-next-line no-console
+    if (verbose) console.warn(`File not found: ${file}`);
+    return null;
+  }
+}
+
+module.exports = function mod(config, ident, opts = {}) {
+  const packageData = data.read(config.dataDir, ident);
+  const firstRun = Object.keys(packageData).length === 0;
+
+  // create file hash object
+  const hashes = config.checkFiles.reduce((acc, file) => {
+    acc[file] = getFileHash(file, opts.verbose);
+    return acc;
+  }, {});
+
+  console.log('First run?', firstRun);
+
+  data.write(config.dataDir, ident, {
+    hashes,
+  });
 };

src/utils.js

@@ -0,0 +1,64 @@
+const path = require('path');
+const fs = require('fs');
+const os = require('os');
+const JoyCon = require('joycon');
+
+exports.getRootPath = () => process.cwd();
+
+exports.getHomeDir = () => os.homedir();
+
+exports.getDataDir = () => path.join(exports.getHomeDir(), '.local/share');
+
+exports.canAccessFile = (p, flag) => {
+  try {
+    fs.accessSync(p, flag || fs.constants.R_OK);
+    return true;
+  } catch (e) {
+    return false;
+  }
+};
+
+exports.getFileContents = (filePath, opts = {}) => {
+  if (!exports.canAccessFile(filePath)) throw new Error(`File not found: ${filePath}`);
+
+  const content = fs.readFileSync(filePath);
+  if (opts.format === 'json') return JSON.parse(content);
+  if (opts.format === 'text') return content.toString();
+  return content;
+};
+
+exports.getRootFileContents = (filename, opts = {}) => {
+  return exports.getFileContents(path.join(exports.getRootPath(), filename), opts);
+};
+
+exports.getIdent = () => {
+  const { name } = exports.getRootFileContents('package.json', { format: 'json' });
+  return name;
+};
+
+exports.getBranch = () => {
+  const headPath = path.join(exports.getRootPath(), '.git/HEAD');
+  if (!exports.canAccessFile(headPath)) throw new Error(`Git HEAD not found: ${headPath}`);
+
+  const head = fs.readFileSync(headPath);
+  const match = /ref: refs\/heads\/([^\n]+)/.exec(head);
+  if (!match) throw new Error(`Unable to read branch from ${headPath}`);
+  return match[1];
+};
+
+exports.getConfig = (overrides = {}) => {
+  const joycon = new JoyCon();
+  const defaults = {
+    checkFiles: ['package-lock.json', 'yarn.lock'],
+    rootDir: process.cwd(),
+    dataDir: exports.getDataDir(),
+    cmd: 'npm',
+  };
+
+  const result = joycon.loadSync({
+    packageKey: 'pkgcomp',
+    files: ['.config/pkgcomp.json', 'pkgcomp.json', 'package.json'],
+  });
+
+  return Object.assign(defaults, result.data, overrides);
+};

yarn.lock

@@ -1432,6 +1432,11 @@ isobject@^3.0.0, isobject@^3.0.1:
   resolved "https://registry.yarnpkg.com/isobject/-/isobject-3.0.1.tgz#4e431e92b11a9731636aa1f9c8d1ccbcfdab78df"
   integrity sha1-TkMekrEalzFjaqH5yNHMvP2reN8=
 
+joycon@^2.2.4:
+  version "2.2.4"
+  resolved "https://registry.yarnpkg.com/joycon/-/joycon-2.2.4.tgz#ac4119d2673dfaa89b41efe5d6d670208e348bc6"
+  integrity sha512-Z4G7ZPovoSfAHCSEKznWV4IjyyUxzTY78Sgtr8inbnRxaZMAQGwqNJ46BDwcH3WgIwk0Xt1kpCsC/DFAioRtBA==
+
 "js-tokens@^3.0.0 || ^4.0.0", js-tokens@^4.0.0:
   version "4.0.0"
   resolved "https://registry.yarnpkg.com/js-tokens/-/js-tokens-4.0.0.tgz#19203fb59991df98e3a287050d4647cdeaf32499"
@@ -1659,6 +1664,11 @@ matcher@^1.0.0:
   dependencies:
     escape-string-regexp "^1.0.4"
 
+md5-file@^4.0.0:
+  version "4.0.0"
+  resolved "https://registry.yarnpkg.com/md5-file/-/md5-file-4.0.0.tgz#f3f7ba1e2dd1144d5bf1de698d0e5f44a4409584"
+  integrity sha512-UC0qFwyAjn4YdPpKaDNw6gNxRf7Mcx7jC1UGCY4boCzgvU2Aoc1mOGzTtrjjLKhM5ivsnhoKpQVxKPp+1j1qwg==
+
 micromatch@^3.1.8:
   version "3.1.10"
   resolved "https://registry.yarnpkg.com/micromatch/-/micromatch-3.1.10.tgz#70859bc95c9840952f359a068a3fc49f9ecfac23"