From 09a33fb156d51e436f263d48c5d954a2c775680f Mon Sep 17 00:00:00 2001
From: Hexagon <hexagon@56k.guru>
Date: Fri, 24 May 2024 23:58:39 +0200
Subject: [PATCH] Add sysinfo module. Update deps.

---
 deno.json        |   9 ++--
 mod.ts           |   8 ++++
 utils/sysinfo.ts | 112 +++++++++++++++++++++++++++++++++++++++++++++++
 3 files changed, 125 insertions(+), 4 deletions(-)
 create mode 100644 utils/sysinfo.ts

diff --git a/deno.json b/deno.json
index 772d5b7..ba64948 100644
--- a/deno.json
+++ b/deno.json
@@ -1,6 +1,6 @@
 {
   "name": "@cross/utils",
-  "version": "0.12.0",
+  "version": "0.13.0",
   "exports": {
     ".": "./mod.ts",
     "./ansi": "./utils/ansi.ts",
@@ -9,13 +9,14 @@
     "./pid": "./utils/pid.ts",
     "./spawn": "./utils/spawn.ts",
     "./table": "./utils/table.ts",
-    "./execpath": "./utils/execpath.ts"
+    "./execpath": "./utils/execpath.ts",
+    "./sysinfo": "./utils/sysinfo.ts"
   },
   "imports": {
-    "@cross/fs": "jsr:@cross/fs@^0.0.8",
+    "@cross/fs": "jsr:@cross/fs@^0.1.11",
     "@cross/runtime": "jsr:@cross/runtime@^1.0.0",
     "@cross/test": "jsr:@cross/test@^0.0.9",
-    "@std/assert": "jsr:@std/assert@^0.221.0"
+    "@std/assert": "jsr:@std/assert@^0.225.3"
   },
   "publish": {
     "exclude": [".github", "*.test.ts"]
diff --git a/mod.ts b/mod.ts
index c4a5abc..489099b 100644
--- a/mod.ts
+++ b/mod.ts
@@ -5,3 +5,11 @@ export { Colors, Cursor, stripAnsi } from "./utils/ansi.ts";
 export { spawn } from "./utils/spawn.ts";
 export type { SpawnResult } from "./utils/spawn.ts";
 export { execPath, resolvedExecPath } from "./utils/execpath.ts";
+export {
+  loadAvg,
+  memoryUsage,
+  type ProcessMemoryInfo,
+  type SystemMemoryInfo,
+  systemMemoryInfo,
+  uptime,
+} from "./utils/sysinfo.ts";
diff --git a/utils/sysinfo.ts b/utils/sysinfo.ts
new file mode 100644
index 0000000..a99f6f4
--- /dev/null
+++ b/utils/sysinfo.ts
@@ -0,0 +1,112 @@
+import { CurrentRuntime, Runtime } from "@cross/runtime";
+import { freemem, loadavg, totalmem, uptime as nodeUptime } from "node:os";
+
+export interface ProcessMemoryInfo {
+  external?: number;
+  heapTotal: number;
+  heapUsed: number;
+  rss: number;
+}
+/** Based on Deno.SystemMemoryInfo */
+export interface SystemMemoryInfo {
+  /** Total installed memory in bytes. */
+  total: number;
+  /** Unused memory in bytes. */
+  free: number;
+  /** Estimation of how much memory, in bytes, is available for starting new
+   * applications, without swapping. Unlike the data provided by the cache or
+   * free fields, this field takes into account page cache and also that not
+   * all reclaimable memory will be reclaimed due to items being in use.
+   */
+  available: number;
+  /** Memory used by kernel buffers. */
+  buffers: number;
+  /** Memory used by the page cache and slabs. */
+  cached: number;
+  /** Total swap memory. */
+  swapTotal: number;
+  /** Unused swap memory. */
+  swapFree: number;
+}
+
+export function memoryUsage(): ProcessMemoryInfo {
+  let memoryUsageResult: ProcessMemoryInfo;
+  if (CurrentRuntime === Runtime.Deno) {
+    //@ts-ignore cross-runtime
+    const { external, heapTotal, heapUsed, rss } = Deno.memoryUsage();
+    memoryUsageResult = { external, heapTotal, heapUsed, rss };
+  } else if (
+    CurrentRuntime === Runtime.Node || CurrentRuntime === Runtime.Bun
+  ) {
+    //@ts-ignore cross-runtime
+    const { external = 0, heapTotal, heapUsed, rss } = process.memoryUsage();
+    memoryUsageResult = { external, heapTotal, heapUsed, rss };
+  } else {
+    memoryUsageResult = { external: 0, heapTotal: 0, heapUsed: 0, rss: 0 };
+  }
+  return memoryUsageResult;
+}
+
+export function loadAvg(): number[] {
+  let loadAvgResult: number[];
+  if (CurrentRuntime === Runtime.Deno) {
+    loadAvgResult = Deno.loadavg();
+  } else if (
+    CurrentRuntime === Runtime.Node || CurrentRuntime === Runtime.Bun
+  ) {
+    // Node.js and Bun provide os module for loadAvg
+    loadAvgResult = loadavg();
+  } else {
+    // Unsupported runtime
+    loadAvgResult = [];
+  }
+  return loadAvgResult;
+}
+
+export function uptime(): number {
+  let uptimeResult: number;
+  if (CurrentRuntime === Runtime.Deno) {
+    uptimeResult = Deno.osUptime();
+  } else if (
+    CurrentRuntime === Runtime.Node || CurrentRuntime === Runtime.Bun
+  ) {
+    // Node.js and Bun provide os module for uptime
+    uptimeResult = nodeUptime();
+  } else {
+    uptimeResult = -1;
+  }
+  return uptimeResult;
+}
+
+export function systemMemoryInfo(): SystemMemoryInfo {
+  let memoryInfoResult: SystemMemoryInfo;
+  if (CurrentRuntime === Runtime.Deno) {
+    memoryInfoResult = Deno.systemMemoryInfo();
+  } else if (
+    CurrentRuntime === Runtime.Node || CurrentRuntime === Runtime.Bun
+  ) {
+    // Node.js and Bun don't have a direct equivalent to Deno.systemMemoryInfo
+    // We can try to approximate values using os module (limited information)
+    memoryInfoResult = {
+      total: totalmem(),
+      free: freemem(),
+      available: -1, // Not directly available
+      buffers: -1, // Not directly available
+      cached: -1, // Not directly available
+      swapTotal: -1, // Approximate swap total
+      swapFree: -1, // Not directly available
+    };
+  } else {
+    // Unsupported runtime
+    memoryInfoResult = {
+      total: -1,
+      free: -1,
+      available: -1,
+      buffers: -1,
+      cached: -1,
+      swapTotal: -1,
+      swapFree: -1,
+    };
+  }
+  return memoryInfoResult;
+}