🎉 Improved documentation and logs for better system understanding & maintenance

backend/node_modules/@pkgjs/parseargs/examples/is-default-value.js

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+'use strict';
+
+// This example shows how to understand if a default value is used or not.
+
+// 1. const { parseArgs } = require('node:util'); // from node
+// 2. const { parseArgs } = require('@pkgjs/parseargs'); // from package
+const { parseArgs } = require('..'); // in repo
+
+const options = {
+  file: { short: 'f', type: 'string', default: 'FOO' },
+};
+
+const { values, tokens } = parseArgs({ options, tokens: true });
+
+const isFileDefault = !tokens.some((token) => token.kind === 'option' &&
+ token.name === 'file'
+);
+
+console.log(values);
+console.log(`Is the file option [${values.file}] the default value? ${isFileDefault}`);
+
+// Try the following:
+//    node is-default-value.js
+//    node is-default-value.js -f FILE
+//    node is-default-value.js --file FILE

backend/node_modules/@pkgjs/parseargs/examples/limit-long-syntax.js

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+'use strict';
+
+// This is an example of using tokens to add a custom behaviour.
+//
+// Require the use of `=` for long options and values by blocking
+// the use of space separated values.
+// So allow `--foo=bar`, and not allow `--foo bar`.
+//
+// Note: this is not a common behaviour, most CLIs allow both forms.
+
+// 1. const { parseArgs } = require('node:util'); // from node
+// 2. const { parseArgs } = require('@pkgjs/parseargs'); // from package
+const { parseArgs } = require('..'); // in repo
+
+const options = {
+  file: { short: 'f', type: 'string' },
+  log: { type: 'string' },
+};
+
+const { values, tokens } = parseArgs({ options, tokens: true });
+
+const badToken = tokens.find((token) => token.kind === 'option' &&
+  token.value != null &&
+  token.rawName.startsWith('--') &&
+  !token.inlineValue
+);
+if (badToken) {
+  throw new Error(`Option value for '${badToken.rawName}' must be inline, like '${badToken.rawName}=VALUE'`);
+}
+
+console.log(values);
+
+// Try the following:
+//    node limit-long-syntax.js -f FILE --log=LOG
+//    node limit-long-syntax.js --file FILE

backend/node_modules/@pkgjs/parseargs/examples/negate.js

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+'use strict';
+
+// This example is used in the documentation.
+
+// How might I add my own support for --no-foo?
+
+// 1. const { parseArgs } = require('node:util'); // from node
+// 2. const { parseArgs } = require('@pkgjs/parseargs'); // from package
+const { parseArgs } = require('..'); // in repo
+
+const options = {
+  'color': { type: 'boolean' },
+  'no-color': { type: 'boolean' },
+  'logfile': { type: 'string' },
+  'no-logfile': { type: 'boolean' },
+};
+const { values, tokens } = parseArgs({ options, tokens: true });
+
+// Reprocess the option tokens and overwrite the returned values.
+tokens
+  .filter((token) => token.kind === 'option')
+  .forEach((token) => {
+    if (token.name.startsWith('no-')) {
+      // Store foo:false for --no-foo
+      const positiveName = token.name.slice(3);
+      values[positiveName] = false;
+      delete values[token.name];
+    } else {
+      // Resave value so last one wins if both --foo and --no-foo.
+      values[token.name] = token.value ?? true;
+    }
+  });
+
+const color = values.color;
+const logfile = values.logfile ?? 'default.log';
+
+console.log({ logfile, color });
+
+// Try the following:
+//    node negate.js
+//    node negate.js --no-logfile --no-color
+//    negate.js --logfile=test.log --color
+//    node negate.js --no-logfile --logfile=test.log --color --no-color

backend/node_modules/@pkgjs/parseargs/examples/no-repeated-options.js

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+'use strict';
+
+// This is an example of using tokens to add a custom behaviour.
+//
+// Throw an error if an option is used more than once.
+
+// 1. const { parseArgs } = require('node:util'); // from node
+// 2. const { parseArgs } = require('@pkgjs/parseargs'); // from package
+const { parseArgs } = require('..'); // in repo
+
+const options = {
+  ding: { type: 'boolean', short: 'd' },
+  beep: { type: 'boolean', short: 'b' }
+};
+const { values, tokens } = parseArgs({ options, tokens: true });
+
+const seenBefore = new Set();
+tokens.forEach((token) => {
+  if (token.kind !== 'option') return;
+  if (seenBefore.has(token.name)) {
+    throw new Error(`option '${token.name}' used multiple times`);
+  }
+  seenBefore.add(token.name);
+});
+
+console.log(values);
+
+// Try the following:
+//    node no-repeated-options --ding --beep
+//    node no-repeated-options --beep -b
+//    node no-repeated-options -ddd

backend/node_modules/@pkgjs/parseargs/examples/ordered-options.mjs

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+// This is an example of using tokens to add a custom behaviour.
+//
+// This adds a option order check so that --some-unstable-option
+// may only be used after --enable-experimental-options
+//
+// Note: this is not a common behaviour, the order of different options
+// does not usually matter.
+
+import { parseArgs } from '../index.js';
+
+function findTokenIndex(tokens, target) {
+  return tokens.findIndex((token) => token.kind === 'option' &&
+    token.name === target
+  );
+}
+
+const experimentalName = 'enable-experimental-options';
+const unstableName = 'some-unstable-option';
+
+const options = {
+  [experimentalName]: { type: 'boolean' },
+  [unstableName]: { type: 'boolean' },
+};
+
+const { values, tokens } = parseArgs({ options, tokens: true });
+
+const experimentalIndex = findTokenIndex(tokens, experimentalName);
+const unstableIndex = findTokenIndex(tokens, unstableName);
+if (unstableIndex !== -1 &&
+  ((experimentalIndex === -1) || (unstableIndex < experimentalIndex))) {
+  throw new Error(`'--${experimentalName}' must be specified before '--${unstableName}'`);
+}
+
+console.log(values);
+
+/* eslint-disable max-len */
+// Try the following:
+//    node ordered-options.mjs
+//    node ordered-options.mjs --some-unstable-option
+//    node ordered-options.mjs --some-unstable-option --enable-experimental-options
+//    node ordered-options.mjs --enable-experimental-options --some-unstable-option

backend/node_modules/@pkgjs/parseargs/examples/simple-hard-coded.js

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+'use strict';
+
+// This example is used in the documentation.
+
+// 1. const { parseArgs } = require('node:util'); // from node
+// 2. const { parseArgs } = require('@pkgjs/parseargs'); // from package
+const { parseArgs } = require('..'); // in repo
+
+const args = ['-f', '--bar', 'b'];
+const options = {
+  foo: {
+    type: 'boolean',
+    short: 'f'
+  },
+  bar: {
+    type: 'string'
+  }
+};
+const {
+  values,
+  positionals
+} = parseArgs({ args, options });
+console.log(values, positionals);
+
+// Try the following:
+//    node simple-hard-coded.js