fix: baseline CPU detection (#13371)

packages/opencode/bin/opencode

@@ -47,20 +47,109 @@ if (!arch) {
 const base = "opencode-" + platform + "-" + arch
 const binary = platform === "windows" ? "opencode.exe" : "opencode"
 
+function supportsAvx2() {
+  if (arch !== "x64") return false
+
+  if (platform === "linux") {
+    try {
+      return /(^|\s)avx2(\s|$)/i.test(fs.readFileSync("/proc/cpuinfo", "utf8"))
+    } catch {
+      return false
+    }
+  }
+
+  if (platform === "darwin") {
+    try {
+      const result = childProcess.spawnSync("sysctl", ["-n", "hw.optional.avx2_0"], {
+        encoding: "utf8",
+        timeout: 1500,
+      })
+      if (result.status !== 0) return false
+      return (result.stdout || "").trim() === "1"
+    } catch {
+      return false
+    }
+  }
+
+  if (platform === "windows") {
+    const cmd =
+      '(Add-Type -MemberDefinition "[DllImport(""kernel32.dll"")] public static extern bool IsProcessorFeaturePresent(int ProcessorFeature);" -Name Kernel32 -Namespace Win32 -PassThru)::IsProcessorFeaturePresent(40)'
+
+    for (const exe of ["powershell.exe", "pwsh.exe", "pwsh", "powershell"]) {
+      try {
+        const result = childProcess.spawnSync(exe, ["-NoProfile", "-NonInteractive", "-Command", cmd], {
+          encoding: "utf8",
+          timeout: 3000,
+          windowsHide: true,
+        })
+        if (result.status !== 0) continue
+        const out = (result.stdout || "").trim().toLowerCase()
+        if (out === "true" || out === "1") return true
+        if (out === "false" || out === "0") return false
+      } catch {
+        continue
+      }
+    }
+
+    return false
+  }
+
+  return false
+}
+
+const names = (() => {
+  const avx2 = supportsAvx2()
+  const baseline = arch === "x64" && !avx2
+
+  if (platform === "linux") {
+    const musl = (() => {
+      try {
+        if (fs.existsSync("/etc/alpine-release")) return true
+      } catch {
+        // ignore
+      }
+
+      try {
+        const result = childProcess.spawnSync("ldd", ["--version"], { encoding: "utf8" })
+        const text = ((result.stdout || "") + (result.stderr || "")).toLowerCase()
+        if (text.includes("musl")) return true
+      } catch {
+        // ignore
+      }
+
+      return false
+    })()
+
+    if (musl) {
+      if (arch === "x64") {
+        if (baseline) return [`${base}-baseline-musl`, `${base}-musl`, `${base}-baseline`, base]
+        return [`${base}-musl`, `${base}-baseline-musl`, base, `${base}-baseline`]
+      }
+      return [`${base}-musl`, base]
+    }
+
+    if (arch === "x64") {
+      if (baseline) return [`${base}-baseline`, base, `${base}-baseline-musl`, `${base}-musl`]
+      return [base, `${base}-baseline`, `${base}-musl`, `${base}-baseline-musl`]
+    }
+    return [base, `${base}-musl`]
+  }
+
+  if (arch === "x64") {
+    if (baseline) return [`${base}-baseline`, base]
+    return [base, `${base}-baseline`]
+  }
+  return [base]
+})()
+
 function findBinary(startDir) {
   let current = startDir
   for (;;) {
     const modules = path.join(current, "node_modules")
     if (fs.existsSync(modules)) {
-      const entries = fs.readdirSync(modules)
-      for (const entry of entries) {
-        if (!entry.startsWith(base)) {
-          continue
-        }
-        const candidate = path.join(modules, entry, "bin", binary)
-        if (fs.existsSync(candidate)) {
-          return candidate
-        }
+      for (const name of names) {
+        const candidate = path.join(modules, name, "bin", binary)
+        if (fs.existsSync(candidate)) return candidate
       }
     }
     const parent = path.dirname(current)
@@ -74,9 +163,9 @@ function findBinary(startDir) {
 const resolved = findBinary(scriptDir)
 if (!resolved) {
   console.error(
-    'It seems that your package manager failed to install the right version of the opencode CLI for your platform. You can try manually installing the "' +
-      base +
-      '" package',
+    "It seems that your package manager failed to install the right version of the opencode CLI for your platform. You can try manually installing " +
+      names.map((n) => `\"${n}\"`).join(" or ") +
+      " package",
   )
   process.exit(1)
 }