From 9f60feaba2bbd2618265f985dcf5cef9071b9c9e Mon Sep 17 00:00:00 2001
From: Ben Hardill <ben@flowforge.com>
Date: Mon, 7 Mar 2022 14:02:42 +0000
Subject: [PATCH 1/4] Use a specific NR version

---
 index.js | 15 ++++++++++-----
 1 file changed, 10 insertions(+), 5 deletions(-)

diff --git a/index.js b/index.js
index 2dd6802..ba63469 100755
--- a/index.js
+++ b/index.js
@@ -25,11 +25,16 @@ options.logBufferMax = options.logBufferMax || 1000
 const ext = process.platform === 'win32' ? '.cmd' : ''
 
 options.execPath = undefined
-for (let i = 0; i < require.main.paths.length; i++) {
-    const execPath = path.join(require.main.paths[i], '.bin', `node-red${ext}`)
-    if (fs.existsSync(execPath)) {
-        options.execPath = execPath
-        break
+if (process.env.FORGE_NR_PATH) {
+    options.execPath = path.join(process.env.FORGE_NR_PATH, 'node_modules', '.bin', `node-red${ext}`)
+} else {
+    // Find the bundled version
+    for (let i = 0; i < require.main.paths.length; i++) {
+        const execPath = path.join(require.main.paths[i], '.bin', `node-red${ext}`)
+        if (fs.existsSync(execPath)) {
+            options.execPath = execPath
+            break
+        }
     }
 }
 

From ac5a100ca608bb4d798efea6d9d56c5aa6acfc67 Mon Sep 17 00:00:00 2001
From: Ben Hardill <ben@flowforge.com>
Date: Mon, 7 Mar 2022 14:37:52 +0000
Subject: [PATCH 2/4] Add fallback if NR version not found

---
 index.js | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/index.js b/index.js
index ba63469..9fcf246 100755
--- a/index.js
+++ b/index.js
@@ -27,7 +27,11 @@ const ext = process.platform === 'win32' ? '.cmd' : ''
 options.execPath = undefined
 if (process.env.FORGE_NR_PATH) {
     options.execPath = path.join(process.env.FORGE_NR_PATH, 'node_modules', '.bin', `node-red${ext}`)
-} else {
+    if (!fs.existsSync(options.execPath)) {
+        options.execPath = undefined
+    }
+}
+if (!options.execPath) {
     // Find the bundled version
     for (let i = 0; i < require.main.paths.length; i++) {
         const execPath = path.join(require.main.paths[i], '.bin', `node-red${ext}`)

From 1b4da6c08c9ab23b8c10b957c13a0ed24984b818 Mon Sep 17 00:00:00 2001
From: Ben Hardill <ben@flowforge.com>
Date: Mon, 7 Mar 2022 14:42:38 +0000
Subject: [PATCH 3/4] Make NR Path a cmd line argument

---
 README.md | 3 ++-
 index.js  | 8 +++++---
 2 files changed, 7 insertions(+), 4 deletions(-)

diff --git a/README.md b/README.md
index e6b552c..42fdb87 100644
--- a/README.md
+++ b/README.md
@@ -8,5 +8,6 @@ Custom laucher to start Node-RED is a loadale set of settings and to capture log
 - --port port to listen on for management interface
 - --project FlowForge project id UUID
 - --token Bearer Token to access Forge platfrom
+- --nodeRedPath path to dir with a `node_modules` directory container a version of Node-RED
 
-FORGE_URL, FORGE_PROJECT_ID & FORGE_PROJECT_TOKEN and be used as env vars instead of the cmd line args if not set (cmd line args take preceident)
\ No newline at end of file
+FORGE_URL, FORGE_PROJECT_ID, FORGE_PROJECT_TOKEN & FORGE_NR_PATH and be used as env vars instead of the cmd line args if not set (cmd line args take preceident)
\ No newline at end of file
diff --git a/index.js b/index.js
index 9fcf246..eee175e 100755
--- a/index.js
+++ b/index.js
@@ -12,7 +12,8 @@ const cmdLineOptions = [
     { name: 'forgeURL', type: String },
     { name: 'project', type: String },
     { name: 'token', type: String },
-    { name: 'buffer', alias: 'b', type: Number }
+    { name: 'buffer', alias: 'b', type: Number },
+    { name: 'nodeRedPath', alias: 'n', type: String }
 ]
 
 const options = commandLineArgs(cmdLineOptions)
@@ -21,12 +22,13 @@ options.forgeURL = options.forgeURL || process.env.FORGE_URL
 options.project = options.project || process.env.FORGE_PROJECT_ID
 options.token = options.token || process.env.FORGE_PROJECT_TOKEN
 options.logBufferMax = options.logBufferMax || 1000
+options.nodeRedPath = options.nodeRedPath || process.env.FORGE_NR_PATH
 
 const ext = process.platform === 'win32' ? '.cmd' : ''
 
 options.execPath = undefined
-if (process.env.FORGE_NR_PATH) {
-    options.execPath = path.join(process.env.FORGE_NR_PATH, 'node_modules', '.bin', `node-red${ext}`)
+if (options.nodeRedPath) {
+    options.execPath = path.join(options.nodeRedPath, 'node_modules', '.bin', `node-red${ext}`)
     if (!fs.existsSync(options.execPath)) {
         options.execPath = undefined
     }

From 13598e44238d765ff60d7332417ded35377437ff Mon Sep 17 00:00:00 2001
From: Ben Hardill <ben@flowforge.com>
Date: Fri, 11 Mar 2022 11:05:04 +0000
Subject: [PATCH 4/4] Add --max-oldspace to launched Node-RED

This is set to 75% of the max memory for the project to get GC to
kick in before the limit is reached
---
 lib/launcher.js | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/lib/launcher.js b/lib/launcher.js
index a503b4d..ee5f017 100644
--- a/lib/launcher.js
+++ b/lib/launcher.js
@@ -129,7 +129,8 @@ class Launcher {
         ]
 
         if (this.settings.stack?.['memory'] && /^[1-9]\d*$/.test(this.settings.stack['memory'])) {
-            processArguments.push(`--max-old-space-size=${this.settings.stack['memory']}`)
+            const memLimit = Math.round(this.settings.stack['memory'] * 0.75)
+            processArguments.push(`--max-old-space-size=${memLimit}`)
         }
 
         this.proc = childProcess.spawn(