chore(tools): create a script to publish npm packages

re #121

tools/scripts/publish.mjs

@@ -0,0 +1,62 @@
+/**
+ * This is a minimal script to publish your package to "npm".
+ * This is meant to be used as-is or customize as you see fit.
+ *
+ * This script is executed on "dist/path/to/library" as "cwd" by default.
+ *
+ * You might need to authenticate with NPM before running this script.
+ */
+
+import { readCachedProjectGraph } from "@nrwl/devkit"
+import { execSync } from "child_process"
+import { readFileSync, writeFileSync } from "fs"
+import chalk from "chalk"
+
+function invariant(condition, message) {
+    if (!condition) {
+        console.error(chalk.bold.red(message))
+        process.exit(1)
+    }
+}
+
+// Executing publish script: node path/to/publish.mjs {name} --version {version}
+const [, , name, version] = process.argv
+
+// A simple SemVer validation to validate the version
+const validVersion = /^\d+\.\d+\.\d(-\w+\.\d+)?/
+invariant(
+    version && validVersion.test(version),
+    `No version provided or version did not match Semantic Versioning, expected: #.#.#, got ${version}.`
+)
+
+const graph = readCachedProjectGraph()
+const project = graph.nodes[name]
+
+invariant(
+    project,
+    `Could not find project "${name}" in the workspace. Is the project.json configured correctly?`
+)
+
+const outputPath = project.data?.targets?.build?.options?.outputPath
+invariant(
+    outputPath,
+    `Could not find "build.options.outputPath" of project "${name}". Is project.json configured  correctly?`
+)
+
+process.chdir(outputPath)
+
+// Updating the version in "package.json" before publishing
+try {
+    const json = JSON.parse(readFileSync(`package.json`).toString())
+    json.version = version
+    writeFileSync(`package.json`, JSON.stringify(json, null, 2))
+} catch (e) {
+    console.error(
+        chalk.bold.red(
+            `Error reading package.json file from library build output.`
+        )
+    )
+}
+
+// Execute "npm publish" to publish
+execSync(`npm publish --access public`)