Uses lerna

Author: Mike Solomon

.gitignore

@@ -1,4 +1,7 @@
 node_modules
 dist
 .unmock
-.env
+.env
+tsconfig.tsbuildinfo
+.vscode
+coverage

.prettierignore

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+*.json
+*.md
+*.snap
+
+dist/

.prettierrc.js

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+module.exports = {
+  // Unfortunately, prettierrc doesn't support explicitly enumerating the files
+  // we wish to "prettify", instead relying on them being passed as a glob on
+  // the CLI.  See https://github.com/prettier/prettier/issues/3764.
+  //
+  // Unfortunately, that complicates the `package.json` scripts since it
+  // requires duplicating globs in multiple places, and also prevents
+  // Prettier-enabled editors from knowing what files are to be covered.
+  //
+  // We can DRY this up a bit by leveraging "requirePragma", an instruction
+  // that tells prettier to only prettify files which contain `@prettier`
+  // (which none of the files in this repository have) and then specifying the
+  // exact files to be prettified.  As the issue above notes, this should become
+  // more succinct in Prettier 2.x.
+  requirePragma: true,
+  overrides: [
+    {
+      files: '{docs/{,source/**},.,packages/**,test}/{*.js,*.ts}',
+      options: {
+        requirePragma: false,
+        trailingComma: 'all',
+        singleQuote: false,
+      },
+    },
+  ],
+};

jest.config.base.js

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+const { defaults } = require("jest-config");
+
+module.exports = {
+  testEnvironment: "node",
+  preset: "ts-jest",
+  testMatch: null,
+  testRegex: "/__tests__/.*\\.test\\.(js|ts)$",
+  testPathIgnorePatterns: ["/node_modules/", "/dist/"],
+  moduleFileExtensions: [...defaults.moduleFileExtensions, "ts", "tsx"],
+  moduleNameMapper: {
+    "^(unmock|unmock-cli|unmock-jsdom|unmock-node)(?:/dist)?((?:/.*)|$)":
+      "<rootDir>/../../packages/$1/src$2"
+  },
+  clearMocks: true,
+  globals: {
+    "ts-jest": {
+      tsConfig: "<rootDir>/src/__tests__/tsconfig.json",
+      diagnostics: false
+    }
+  }
+};

jest.config.js

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+{
+  "packages": [
+    "packages/**"
+  ],
+  "version": "0.0.41"
+}