🦀 - initial commit

Author: manuschillerdev

.gitignore

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+# compiled output
+/dist
+/node_modules
+
+# Logs
+logs
+*.log
+npm-debug.log*
+pnpm-debug.log*
+yarn-debug.log*
+yarn-error.log*
+lerna-debug.log*
+
+# OS
+.DS_Store
+
+# Tests
+/coverage
+/.nyc_output
+
+# IDEs and editors
+/.idea
+.project
+.classpath
+.c9/
+*.launch
+.settings/
+*.sublime-workspace
+
+# IDE - VSCode
+.vscode/*
+!.vscode/settings.json
+!.vscode/tasks.json
+!.vscode/launch.json
+!.vscode/extensions.json

.swcrc

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+{
+  "sourceMaps": true,
+  "module": {
+    "type": "commonjs",
+    "strict": true
+  },
+  "jsc": {
+    "target": "es2020",
+    "parser": {
+      "syntax": "typescript",
+      "decorators": true
+    },
+    "transform": {
+      "legacyDecorator": true,
+      "decoratorMetadata": true
+    },
+    "keepClassNames": true
+  }
+}

README.md

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+# Using NestJS with SWC
+
+This experimental project aims to explore the possibilities of using `swc` with `NestJS`.
+Tries to mimic a non-trivial project with `TypeORM`, `nestjsx/crud`, and dynamically loaded entities.
+
+foo
+
+## Features
+
+- dev-server with
+  - experimental "hot-reloading"
+  - transpiled by `swc` instead of `ts-loader`
+  - does not write transpiled files to disk (no `dist` folder in dev)
+  - supports source-maps (correct mappings of line numbers in errors to Typescript source files)
+- alternative webpack setup (disclaimer: totally not happy with this)
+  - uses `swc-loader` instead of `ts-loader`
+  - removes `ForkTsCheckerWebpackPlugin`
+  - uses a HMR config based on the docs
+  - ⚠️ does not seem reliable (code changes are sometimes not reflected in responses). Unclear if `swc-loader` might cause or if the setup is wrong.
+  - ⚠️ does not have proper source-map support
+  - ⚠️ does not support generic glob references to entities
+- testing (`jest`)
+  - uses `@swc/jest` for transforms
+  - supports coverage reports
+  - supports watch mode
+  - supports e2e-test. ⚠️ needed to change `import * as request from "supertest";` to `import request from "supertest";` to make it work
+
+## Benchmarks
+
+### jest
+
+```bash
+❯ hyperfine "npm run test" # with ts-jest
+Benchmark #1: npm run test
+  Time (mean ± σ):      3.436 s ±  0.349 s    [User: 4.680 s, System: 0.543 s]
+  Range (min … max):    3.156 s …  4.211 s    10 runs
+
+❯ hyperfine "npm run test" # with @swc/jest
+Benchmark #1: npm run test
+  Time (mean ± σ):      1.447 s ±  0.020 s    [User: 1.268 s, System: 0.323 s]
+  Range (min … max):    1.428 s …  1.500 s
+```
+
+## Caveats
+
+- Sometimes, TypeORM does not close the connection properly. In this case, the server needs to be restarted manually
+- HMR is 100% experimental. Open to any ideas on how this could be implemented better.

nest-cli.json

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+{
+  "collection": "@nestjs/schematics",
+  "sourceRoot": "src"
+}