From d80084bfb7f87d359ce01b2820f63e4aeeefa0c1 Mon Sep 17 00:00:00 2001
From: Daniel <daniel.hutzel@sap.com>
Date: Tue, 17 Nov 2020 17:41:55 +0100
Subject: [PATCH] Added @capire:registry

---
 .registry/server.js | 71 +++++++++++++++++++++++++++++++++++++++++++++
 README.md           | 16 ++++++++++
 package.json        |  1 +
 3 files changed, 88 insertions(+)
 create mode 100644 .registry/server.js

diff --git a/.registry/server.js b/.registry/server.js
new file mode 100644
index 00000000..c1461016
--- /dev/null
+++ b/.registry/server.js
@@ -0,0 +1,71 @@
+const { exec } = require ('child_process')
+const express = require ('express')
+const fs = require ('fs')
+const app = express()
+
+const { PORT=4444 } = process.env
+const [,,port=PORT] = process.argv
+
+app.use('/-/:tarball', (req,res,next) => {
+  const url = decodeURIComponent(req.url)
+  console.debug ('GET', req.params)
+  try {
+    const { tarball } = req.params
+    const [, pkg ] = /^capire-(\w+)/.exec(tarball)
+    fs.lstat(tarball,(err => {
+      if (err) exec(`npm pack ../${pkg}`,next)
+      else next()
+    }))
+  } catch (e) {
+    console.error(e)
+    res.sendStatus(500)
+  }
+})
+
+app.use('/-', express.static(__dirname))
+
+app.get('/*', (req,res)=>{
+  const url = decodeURIComponent(req.url)
+  console.debug ('GET',url)
+  try {
+    const [, capire, pkg ] = /^\/(@capire)\/(\w+)/.exec(url)
+    const package = require (`${capire}/${pkg}/package.json`)
+    const tarball = `capire-${pkg}-${package.version}.tgz`
+    // https://github.com/npm/registry/blob/master/docs/responses/package-metadata.md
+    res.json({
+      "name": package.name,
+      "dist-tags": {
+        "latest": package.version
+      },
+      "versions": {
+        [package.version]: {
+          "name": package.name,
+          "version": package.version,
+          "dist": {
+            "tarball": `http://localhost:${port}/-/${tarball}`
+          },
+        }
+      },
+    })
+  } catch (e) {
+    console.error(e)
+    res.sendStatus(404)
+  }
+})
+
+app.listen(port, ()=>{
+  console.log (`npm set @capire:registry=http://localhost:${port}`)
+  console.log (`@capire registry listening on http://localhost:${port}`)
+  exec(`npm set @capire:registry=http://localhost:${port}`)
+})
+
+const _exit = ()=>{
+  console.log ('\nnpm conf rm @capire:registry')
+  exec('npm conf rm @capire:registry')
+  exec('rm *.tgz')
+  process.exit()
+}
+process.on ('SIGTERM',_exit)
+process.on ('SIGHUP',_exit)
+process.on ('SIGINT',_exit)
+process.on ('SIGUSR2',_exit)
diff --git a/README.md b/README.md
index 01d8fdf1..9f7773c4 100644
--- a/README.md
+++ b/README.md
@@ -48,6 +48,22 @@ npx jest
 > While mocha is a bit smaller and faster, jest runs tests in parallel and isolation, which allows to run all tests.
 
 
+### Serve `npm` 
+
+We've simple npm registry mock included which allows you to do an `npm install @capire/<package>` anywhere locally. Use it as follows:
+
+1. Start the @capire registry:
+```sh
+npm run registry
+```
+> While running this will have `@capire:registry=http://localhost:4444` set with npmrc. 
+
+2. Install one of the @capire packages wherever you like, e.g.:
+```sh
+npm add @capire/common @capire/bookshop
+```
+
+
 ## Get Support
 
 Check out the documentation at [https://cap.cloud.sap](https://cap.cloud.sap). <br>
diff --git a/package.json b/package.json
index b783f428..21fbea51 100644
--- a/package.json
+++ b/package.json
@@ -20,6 +20,7 @@
     "sqlite3": "^5"
   },
   "scripts": {
+    "registry": "cd .registry && node server.js",
     "bookshop": "cds watch bookshop",
     "fiori": "cds watch fiori",
     "media": "cds watch media",