feat: add plugin build command (medusajs#10935)

Fixes: FRMW-2863

Adds the `plugin:build` command that is used to compile the source code of a plugin for publishing it to a package registry. The command is similar to the `build` command, except it does not copy the `package.json` and the `lock` files to the build output

.changeset/calm-cameras-unite.md

@@ -0,0 +1,7 @@
+---
+"@medusajs/medusa": patch
+"@medusajs/framework": patch
+"@medusajs/cli": patch
+---
+
+feat: add plugin build command

packages/cli/medusa-cli/src/create-cli.ts

@@ -254,10 +254,20 @@ function buildLocalCommands(cli, isLocalProject) {
         })
       ),
     })
+    .command({
+      command: "plugin:build",
+      desc: "Build plugin source for publishing to a package registry",
+      handler: handlerP(
+        getCommandHandler("plugin/build", (args, cmd) => {
+          process.env.NODE_ENV = process.env.NODE_ENV || `development`
+          cmd(args)
+          return new Promise((resolve) => {})
+        })
+      ),
+    })
     .command({
       command: "plugin:develop",
       desc: "Start plugin development process in watch mode. Changes will be re-published to the local packages registry",
-      builder: (builder) => {},
       handler: handlerP(
         getCommandHandler("plugin/develop", (args, cmd) => {
           process.env.NODE_ENV = process.env.NODE_ENV || `development`

packages/core/framework/src/build-tools/compiler.ts

@@ -382,8 +382,55 @@ export class Compiler {
     }
   }
 
-  // @todo
-  buildPluginBackend() {}
+  /**
+   * Compiles the plugin source code to JavaScript using the
+   * TypeScript's official compiler
+   */
+  async buildPluginBackend(tsConfig: tsStatic.ParsedCommandLine) {
+    const tracker = this.#trackDuration()
+    const dist = ".medusa/server"
+    this.#logger.info("Compiling plugin source...")
+
+    /**
+     * Step 1: Cleanup existing build output
+     */
+    this.#logger.info(
+      `Removing existing "${path.relative(this.#projectRoot, dist)}" folder`
+    )
+    await this.#clean(dist)
+
+    /**
+     * Step 2: Compile TypeScript source code
+     */
+    const { emitResult, diagnostics } = await this.#emitBuildOutput(
+      tsConfig,
+      ["integration-tests", "test", "unit-tests", "src/admin"],
+      dist
+    )
+
+    /**
+     * Exit early if no output is written to the disk
+     */
+    if (emitResult.emitSkipped) {
+      this.#logger.warn("Plugin build completed without emitting any output")
+      return false
+    }
+
+    /**
+     * Notify about the state of build
+     */
+    if (diagnostics.length) {
+      this.#logger.warn(
+        `Plugin build completed with errors (${tracker.getSeconds()}s)`
+      )
+    } else {
+      this.#logger.info(
+        `Plugin build completed successfully (${tracker.getSeconds()}s)`
+      )
+    }
+
+    return true
+  }
 
   /**
    * Compiles the backend source code of a plugin project in watch

packages/medusa/src/commands/plugin/build.ts

@@ -0,0 +1,22 @@
+import { logger } from "@medusajs/framework/logger"
+import { Compiler } from "@medusajs/framework/build-tools"
+
+export default async function build({
+  directory,
+  adminOnly,
+}: {
+  directory: string
+  adminOnly: boolean
+}): Promise<boolean> {
+  logger.info("Starting build...")
+  const compiler = new Compiler(directory, logger)
+
+  const tsConfig = await compiler.loadTSConfigFile()
+  if (!tsConfig) {
+    logger.error("Unable to compile plugin")
+    return false
+  }
+
+  await compiler.buildPluginBackend(tsConfig)
+  return true
+}