Merge pull request #571 from flowforge/fix-stack-installer

Fix stack installer

docs/install/local/stacks.md

@@ -19,7 +19,32 @@ FlowForge is installed.
 As new versions of Node-RED are released, the following steps can be used to
 make them available within FlowForge.
 
-For example, to add Node-RED 2.2.2:
+### Development
+
+If you are developing FlowForge having checked it out from GitHub then you can run 
+the following command in the project root
+
+```bash
+npm run install-stack --vers=2.2.2
+```
+
+### Production
+
+If you are running a version from the installer then you can run the following 
+commands where `bin` is in the FlowForge Home directory 
+(e.g. `/opt/flowforge`)
+
+Linux/Mac
+```
+bin/install-stack.sh 2.2.2
+```
+
+Windows:
+```
+bin\install-stack.bat 2.2.2
+```
+
+These scripts will automate the following steps
 
 1. In the `var` directory in your FlowForge home directory, create a directory
    called `stacks`

package.json

@@ -19,10 +19,11 @@
         "cover:system": "nyc --silent --no-clean npm run test:system",
         "cover:report": "nyc report --reporter=text --reporter html",
         "dev:local": "cd ../flowforge-nr-launcher && npm install ../flowforge-nr-storage ../flowforge-nr-auth ../flowforge-nr-audit-logger && cd ../flowforge-driver-localfs && npm install ../flowforge-nr-launcher && cd ../flowforge && npm install ../flowforge-driver-localfs ../forge-ui-components",
-        "install-stack": "node forge/install-stack.js --"
+        "install-stack": "node scripts/install-stack.js --"
     },
     "bin": {
-        "flowforge": "./forge/app.js"
+        "flowforge": "./forge/app.js",
+        "ff-install-stack": "./scripts/install-stack.js"
     },
     "repository": {
         "type": "git",

scripts/install-stack.js

@@ -0,0 +1,35 @@
+const { exec } = require('child_process')
+const { log, error } = require('console')
+const fs = require('fs')
+const path = require('path')
+
+const flowforgeHome = process.env.FLOWFORGE_HOME
+
+let vers = process.env.npm_config_vers
+if (!vers) {
+    vers = process.argv[process.argv.length - 1]
+    if (!vers) {
+        throw new Error('command line arg vars is missing')
+    }
+}
+
+if (!/^(0|[1-9]\d*)\.(0|[1-9]\d*)\.(0|[1-9]\d*)(?:-((?:0|[1-9]\d*|\d*[a-zA-Z-][0-9a-zA-Z-]*)(?:\.(?:0|[1-9]\d*|\d*[a-zA-Z-][0-9a-zA-Z-]*))*))?(?:\+([0-9a-zA-Z-]+(?:\.[0-9a-zA-Z-]+)*))?$/.test(vers)) {
+    throw new Error('version not valid semantic version')
+}
+
+const p = path.join('var', 'stacks', vers)
+if (flowforgeHome) {
+    path.join(flowforgeHome, p)
+}
+fs.mkdirSync(p, { recursive: true })
+
+log(`installing stack node-red@${vers}`)
+const npmCmd = `npm install --prefix ${p} node-red@${vers}`
+
+exec(npmCmd, (err, stdout, stderr) => {
+    if (err) {
+        error(err)
+    } else {
+        log(`installed stack node-red@${vers}`)
+    }
+})