a-c-m · December 13, 2023 15:05 · Dec 13, 2023 · Dec 13, 2023
diff --git a/caret-or-tilde.js b/caret-or-tilde.js
@@ -1,5 +1,6 @@
 /*
 Custom ESLint rule to disallow the use of '^' or '~' in dependencies' versions in package.json files.
+(--fix works and will remove the '^' or '~' characters from the package.json file!)
 
 eslint-plugin-package-json-dependencies/index.js
 module.exports = {

diff --git a/caret-or-tilde.js b/caret-or-tilde.js
@@ -0,0 +1,73 @@
+/*
+Custom ESLint rule to disallow the use of '^' or '~' in dependencies' versions in package.json files.
+
+eslint-plugin-package-json-dependencies/index.js
+module.exports = {
+  rules: {
+    'caret-or-tilde': require('./caret-or-tilde'),
+  },
+};
+
+.estlint.rc.js
+{
+  files: ['package.json'],
+  parserOptions: {
+    project: null, // unset parserOptions.project for this file
+  },
+  plugins: ['package-json-dependencies'],
+  rules: {
+    '@typescript-eslint/no-unused-expressions': 'off',
+    '@typescript-eslint/no-unused-vars': 'off',
+    '@typescript-eslint/no-var-requires': 'off',
+    quotes: ['warn', 'double'],
+    'object-curly-spacing': ['warn', 'always'],
+    indent: ['warn', 2],
+    'package-json-dependencies/caret-or-tilde': 'warn',
+  },
+},
+*/
+
+module.exports = {
+  meta: {
+    type: 'suggestion',
+    docs: {
+      description: "Disallow the use of '^' or '~' in dependencies' versions",
+      category: 'Best Practices',
+      recommended: true,
+    },
+    fixable: 'code',
+  },
+
+  create(context) {
+    function reportError(node, message, fix) {
+      context.report({
+        node,
+        message,
+        fix,
+      });
+    }
+
+    return {
+      Property(node) {
+        const allowedKeys = ['dependencies', 'devDependencies'];
+        const parent = node.parent.parent.key?.value;
+
+        if (parent && allowedKeys.includes(parent)) {
+          const package = node.key.value;
+          const version = node.value.value;
+
+          if (version.startsWith('^') || version.startsWith('~')) {
+            reportError(
+              node,
+              `Use exact versions instead of '^' or '~' for ${package} in ${parent}.`,
+              (fixer) => {
+                const fixedVersion = version.replace(/[\^~]/g, '');
+                return fixer.replaceTextRange(node.value.range, JSON.stringify(fixedVersion));
+              },
+            );
+          }
+        }
+      },
+    };
+  },
+};