Addded better Go agent upgradation support

backend/src/routes/hostRoutes.js

@@ -123,35 +123,97 @@ router.get("/agent/download", async (req, res) => {
 });
 
 // Version check endpoint for agents
-router.get("/agent/version", async (_req, res) => {
+router.get("/agent/version", async (req, res) => {
 	try {
 		const fs = require("node:fs");
 		const path = require("node:path");
+		const { exec } = require("node:child_process");
+		const { promisify } = require("node:util");
+		const execAsync = promisify(exec);
 
-		// Read version directly from agent script file
-		const agentPath = path.join(__dirname, "../../../agents/patchmon-agent.sh");
+		// Get architecture parameter (default to amd64 for Go agents)
+		const architecture = req.query.arch || "amd64";
+		const agentType = req.query.type || "go"; // "go" or "legacy"
 
-		if (!fs.existsSync(agentPath)) {
-			return res.status(404).json({ error: "Agent script not found" });
+		if (agentType === "legacy") {
+			// Legacy agent version check (bash script)
+			const agentPath = path.join(
+				__dirname,
+				"../../../agents/patchmon-agent.sh",
+			);
+
+			if (!fs.existsSync(agentPath)) {
+				return res.status(404).json({ error: "Legacy agent script not found" });
+			}
+
+			const scriptContent = fs.readFileSync(agentPath, "utf8");
+			const versionMatch = scriptContent.match(/AGENT_VERSION="([^"]+)"/);
+
+			if (!versionMatch) {
+				return res
+					.status(500)
+					.json({ error: "Could not extract version from agent script" });
+			}
+
+			const currentVersion = versionMatch[1];
+
+			res.json({
+				currentVersion: currentVersion,
+				downloadUrl: `/api/v1/hosts/agent/download`,
+				releaseNotes: `PatchMon Agent v${currentVersion}`,
+				minServerVersion: null,
+			});
+		} else {
+			// Go agent version check (binary)
+			const binaryName = `patchmon-agent-linux-${architecture}`;
+			const binaryPath = path.join(__dirname, "../../../agents", binaryName);
+
+			if (!fs.existsSync(binaryPath)) {
+				return res.status(404).json({
+					error: `Go agent binary not found for architecture: ${architecture}`,
+				});
+			}
+
+			// Execute the binary to get its version
+			try {
+				const { stdout } = await execAsync(`${binaryPath} --help`, {
+					timeout: 10000,
+				});
+
+				// Parse version from help output (e.g., "PatchMon Agent v1.3.1")
+				const versionMatch = stdout.match(
+					/PatchMon Agent v([0-9]+\.[0-9]+\.[0-9]+)/i,
+				);
+
+				if (!versionMatch) {
+					return res.status(500).json({
+						error: "Could not extract version from agent binary",
+					});
+				}
+
+				const serverVersion = versionMatch[1];
+				const agentVersion = req.query.currentVersion || serverVersion;
+
+				// Simple version comparison (assuming semantic versioning)
+				const hasUpdate = agentVersion !== serverVersion;
+
+				res.json({
+					currentVersion: agentVersion,
+					latestVersion: serverVersion,
+					hasUpdate: hasUpdate,
+					downloadUrl: `/api/v1/hosts/agent/download?arch=${architecture}`,
+					releaseNotes: `PatchMon Agent v${serverVersion}`,
+					minServerVersion: null,
+					architecture: architecture,
+					agentType: "go",
+				});
+			} catch (execError) {
+				console.error("Failed to execute agent binary:", execError.message);
+				return res.status(500).json({
+					error: "Failed to get version from agent binary",
+				});
+			}
 		}
-
-		const scriptContent = fs.readFileSync(agentPath, "utf8");
-		const versionMatch = scriptContent.match(/AGENT_VERSION="([^"]+)"/);
-
-		if (!versionMatch) {
-			return res
-				.status(500)
-				.json({ error: "Could not extract version from agent script" });
-		}
-
-		const currentVersion = versionMatch[1];
-
-		res.json({
-			currentVersion: currentVersion,
-			downloadUrl: `/api/v1/hosts/agent/download`,
-			releaseNotes: `PatchMon Agent v${currentVersion}`,
-			minServerVersion: null,
-		});
 	} catch (error) {
 		console.error("Version check error:", error);
 		res.status(500).json({ error: "Failed to get agent version" });

backend/src/services/agentVersionService.js

@@ -410,11 +410,26 @@ class AgentVersionService {
 	async getVersionInfo() {
 		let hasUpdate = false;
 		let updateStatus = "unknown";
+		let effectiveLatestVersion = this.currentVersion; // Always use local version if available
 
-		if (this.currentVersion && this.latestVersion) {
+		// If we have a local version, use it as the latest regardless of GitHub
+		if (this.currentVersion) {
+			effectiveLatestVersion = this.currentVersion;
+			console.log(
+				`🔄 Using local agent version ${this.currentVersion} as latest`,
+			);
+		} else if (this.latestVersion) {
+			// Fallback to GitHub version only if no local version
+			effectiveLatestVersion = this.latestVersion;
+			console.log(
+				`🔄 No local version found, using GitHub version ${this.latestVersion}`,
+			);
+		}
+
+		if (this.currentVersion && effectiveLatestVersion) {
 			const comparison = compareVersions(
 				this.currentVersion,
-				this.latestVersion,
+				effectiveLatestVersion,
 			);
 			if (comparison < 0) {
 				hasUpdate = true;
@@ -426,25 +441,25 @@ class AgentVersionService {
 				hasUpdate = false;
 				updateStatus = "up-to-date";
 			}
-		} else if (this.latestVersion && !this.currentVersion) {
+		} else if (effectiveLatestVersion && !this.currentVersion) {
 			hasUpdate = true;
 			updateStatus = "no-agent";
-		} else if (this.currentVersion && !this.latestVersion) {
+		} else if (this.currentVersion && !effectiveLatestVersion) {
 			// We have a current version but no latest version (GitHub API unavailable)
 			hasUpdate = false;
 			updateStatus = "github-unavailable";
-		} else if (!this.currentVersion && !this.latestVersion) {
+		} else if (!this.currentVersion && !effectiveLatestVersion) {
 			updateStatus = "no-data";
 		}
 
 		return {
 			currentVersion: this.currentVersion,
-			latestVersion: this.latestVersion,
+			latestVersion: effectiveLatestVersion,
 			hasUpdate: hasUpdate,
 			updateStatus: updateStatus,
 			lastChecked: this.lastChecked,
 			supportedArchitectures: this.supportedArchitectures,
-			status: this.latestVersion ? "ready" : "no-releases",
+			status: effectiveLatestVersion ? "ready" : "no-releases",
 		};
 	}
 
@@ -511,6 +526,32 @@ class AgentVersionService {
 
 	async getBinaryInfo(version, architecture) {
 		try {
+			// Always use local version if it matches the requested version
+			if (version === this.currentVersion && this.currentVersion) {
+				const binaryPath = await this.getBinaryPath(
+					this.currentVersion,
+					architecture,
+				);
+				const stats = await fs.stat(binaryPath);
+
+				// Calculate file hash
+				const fileBuffer = await fs.readFile(binaryPath);
+				const hash = crypto
+					.createHash("sha256")
+					.update(fileBuffer)
+					.digest("hex");
+
+				return {
+					version: this.currentVersion,
+					architecture,
+					size: stats.size,
+					hash,
+					lastModified: stats.mtime,
+					path: binaryPath,
+				};
+			}
+
+			// For other versions, try to find them in the agents folder
 			const binaryPath = await this.getBinaryPath(version, architecture);
 			const stats = await fs.stat(binaryPath);