Use cli-argv-util to parse flags

bin/cli.js

@@ -20,56 +20,50 @@
 //    $ node bin/cli.js --cd=spec/fixtures source target/cd --summary
 
 // Imports
+import { cliArgvUtil } from 'cli-argv-util';
 import { imgSrcPlaceholder } from '../dist/img-src-placeholder.js';
 import chalk from 'chalk';
 import fs    from 'fs';
 import log   from 'fancy-log';
 import path  from 'path';
 
-// Parameters
-const validFlags =  ['cd', 'ext', 'note', 'quiet', 'summary'];
-const args =        process.argv.slice(2);
-const flags =       args.filter(arg => /^--/.test(arg));
-const flagMap =     Object.fromEntries(flags.map(flag => flag.replace(/^--/, '').split('=')));
-const flagOn =      Object.fromEntries(validFlags.map(flag => [flag, flag in flagMap]));
-const invalidFlag = Object.keys(flagMap).find(key => !validFlags.includes(key));
-const params =      args.filter(arg => !/^--/.test(arg));
-
-// Data
-const source = params[0];  //origin file or folder
-const target = params[1];  //destination folder
+// Parameters and flags
+const validFlags = ['cd', 'ext', 'note', 'quiet', 'summary'];
+const cli =        cliArgvUtil.parse(validFlags);
+const source =     cli.params[0];  //origin file or folder
+const target =     cli.params[1];  //destination folder
 
 // Reporting
 const printReport = (results) => {
    const name =      chalk.gray('img-src-placeholder');
    const source =    chalk.blue.bold(results.source);
    const target =    chalk.magenta(results.target);
-   const arrow =     { big: chalk.gray.bold('➤➤➤'), little: chalk.gray.bold(' ⟹  ') };  //extra space for alignment
+   const arrow =     { big: chalk.gray.bold(' ⟹  '), little: chalk.gray.bold('→') };
    const infoColor = results.count ? chalk.white : chalk.red.bold;
    const info =      infoColor(`(files: ${results.count}, ${results.duration}ms)`);
    const logFile =   (file) => log(name, chalk.white(file.origin), arrow.little, chalk.green(file.dest));
    log(name, source, arrow.big, target, info);
-   if (!flagOn.summary)
+   if (!cli.flagOn.summary)
       results.files.forEach(logFile);
    };
 
 // Transform Files
 const error =
-   invalidFlag ?       'Invalid flag: ' + invalidFlag :
-   !source ?           'Missing source folder.' :
-   !target ?           'Missing target folder.' :
-   params.length > 2 ? 'Extraneous parameter: ' + params[2] :
+   cli.invalidFlag ?     cli.invalidFlagMsg :
+   !source ?             'Missing source folder.' :
+   !target ?             'Missing target folder.' :
+   cli.paramsCount > 2 ? 'Extraneous parameter: ' + cli.params[2] :
    null;
 if (error)
    throw Error('[img-src-placeholder] ' + error);
-const sourceFile =   path.join(flagMap.cd ?? '', source);
+const sourceFile =   path.join(cli.flagMap.cd ?? '', source);
 const isFile =       fs.existsSync(sourceFile) && fs.statSync(sourceFile).isFile();
 const sourceFolder = isFile ? path.dirname(source) : source;
 const options = {
-   cd:         flagMap.cd ?? null,
-   extensions: flagMap.ext?.split(',') ?? [],
+   cd:         cli.flagMap.cd ?? null,
+   extensions: cli.flagMap.ext?.split(',') ?? [],
    filename:   isFile ? path.basename(source) : null,
    };
 const results = imgSrcPlaceholder.transform(sourceFolder, target, options);
-if (!flagOn.quiet)
+if (!cli.flagOn.quiet)
    printReport(results);

package.json

@@ -83,6 +83,7 @@
    },
    "dependencies": {
       "chalk": "~5.1",
+      "cli-argv-util": "~0.1",
       "fancy-log": "~2.0",
       "glob": "~8.0",
       "istextorbinary": "~6.0",
@@ -92,18 +93,18 @@
    "devDependencies": {
       "@types/fancy-log": "~2.0",
       "@types/node": "~18.11",
-      "@typescript-eslint/eslint-plugin": "~5.42",
-      "@typescript-eslint/parser": "~5.42",
+      "@typescript-eslint/eslint-plugin": "~5.43",
+      "@typescript-eslint/parser": "~5.43",
       "add-dist-header": "~0.3",
       "assert-deep-strict-equal": "~1.0",
       "copy-file-util": "~0.1",
-      "eslint": "~8.27",
+      "eslint": "~8.28",
       "jshint": "~2.13",
       "mocha": "~10.1",
       "rev-web-assets": "~0.1",
       "rimraf": "~3.0",
       "run-scripts-util": "~0.1",
-      "typescript": "~4.8",
+      "typescript": "~4.9",
       "w3c-html-validator": "~1.2"
    }
 }