Add Android ARM64 platform support

Co-authored-by: grand151 <86811297+grand151@users.noreply.github.com>

Author: Copilot

README.md

@@ -61,6 +61,18 @@ nix run nixpkgs#opencode           # or github:anomalyco/opencode for latest dev
 > [!TIP]
 > Remove versions older than 0.1.x before installing.
 
+#### Android/Termux
+
+OpenCode can be installed on Android ARM64 devices using Termux:
+
+```bash
+# In Termux
+curl -fsSL https://opencode.ai/install | bash
+```
+
+> [!NOTE]
+> The Android build is based on the Linux ARM64 binary and may require proot-distro for full compatibility. Direct execution in Termux may have limitations due to Android's security model. For best results, consider using proot-distro with Alpine Linux.
+
 ### Desktop App (BETA)
 
 OpenCode is also available as a desktop application. Download directly from the [releases page](https://github.com/anomalyco/opencode/releases) or [opencode.ai/download](https://opencode.ai/download).

install

@@ -78,9 +78,22 @@ if [ -n "$binary_path" ]; then
 else
     raw_os=$(uname -s)
     os=$(echo "$raw_os" | tr '[:upper:]' '[:lower:]')
+    
+    # Check if running on Android (e.g., Termux)
+    is_android=false
+    if [ -d /system/app ] && [ -d /system/priv-app ]; then
+      is_android=true
+    fi
+    
     case "$raw_os" in
       Darwin*) os="darwin" ;;
-      Linux*) os="linux" ;;
+      Linux*) 
+        if [ "$is_android" = "true" ]; then
+          os="android"
+        else
+          os="linux"
+        fi
+        ;;
       MINGW*|MSYS*|CYGWIN*) os="windows" ;;
     esac
 
@@ -101,16 +114,19 @@ else
 
     combo="$os-$arch"
     case "$combo" in
-      linux-x64|linux-arm64|darwin-x64|darwin-arm64|windows-x64)
+      linux-x64|linux-arm64|darwin-x64|darwin-arm64|windows-x64|android-arm64)
         ;;
       *)
         echo -e "${RED}Unsupported OS/Arch: $os/$arch${NC}"
+        if [ "$is_android" = "true" ] && [ "$arch" != "arm64" ]; then
+          echo -e "${MUTED}Note: OpenCode on Android/Termux currently only supports ARM64 architecture.${NC}"
+        fi
         exit 1
         ;;
     esac
 
     archive_ext=".zip"
-    if [ "$os" = "linux" ]; then
+    if [ "$os" = "linux" ] || [ "$os" = "android" ]; then
       archive_ext=".tar.gz"
     fi
 
@@ -158,17 +174,20 @@ else
     fi
 
     target="$os-$arch"
-    if [ "$needs_baseline" = "true" ]; then
-      target="$target-baseline"
-    fi
-    if [ "$is_musl" = "true" ]; then
-      target="$target-musl"
+    # Android doesn't need baseline or musl variants
+    if [ "$os" != "android" ]; then
+      if [ "$needs_baseline" = "true" ]; then
+        target="$target-baseline"
+      fi
+      if [ "$is_musl" = "true" ]; then
+        target="$target-musl"
+      fi
     fi
 
     filename="$APP-$target$archive_ext"
 
 
-    if [ "$os" = "linux" ]; then
+    if [ "$os" = "linux" ] || [ "$os" = "android" ]; then
         if ! command -v tar >/dev/null 2>&1; then
              echo -e "${RED}Error: 'tar' is required but not installed.${NC}"
              exit 1
@@ -334,7 +353,7 @@ download_and_install() {
         curl -# -L -o "$tmp_dir/$filename" "$url"
     fi
 
-    if [ "$os" = "linux" ]; then
+    if [ "$os" = "linux" ] || [ "$os" = "android" ]; then
         tar -xzf "$tmp_dir/$filename" -C "$tmp_dir"
     else
         unzip -q "$tmp_dir/$filename" -d "$tmp_dir"

packages/opencode/script/build.ts

@@ -60,11 +60,17 @@ const allTargets: {
   arch: "arm64" | "x64"
   abi?: "musl"
   avx2?: false
+  android?: boolean
 }[] = [
   {
     os: "linux",
     arch: "arm64",
   },
+  {
+    os: "linux",
+    arch: "arm64",
+    android: true,
+  },
   {
     os: "linux",
     arch: "x64",
@@ -146,7 +152,7 @@ for (const item of targets) {
   const name = [
     pkg.name,
     // changing to win32 flags npm for some reason
-    item.os === "win32" ? "windows" : item.os,
+    item.os === "win32" ? "windows" : item.android ? "android" : item.os,
     item.arch,
     item.avx2 === false ? "baseline" : undefined,
     item.abi === undefined ? undefined : item.abi,
@@ -163,6 +169,9 @@ for (const item of targets) {
   const bunfsRoot = item.os === "win32" ? "B:/~BUN/root/" : "/$bunfs/root/"
   const workerRelativePath = path.relative(dir, parserWorker).replaceAll("\\", "/")
 
+  // For Android, use the linux-arm64 target as Bun doesn't have native Android support
+  const buildTarget = item.android ? "bun-linux-arm64" : name.replace(pkg.name, "bun")
+
   await Bun.build({
     conditions: ["browser"],
     tsconfig: "./tsconfig.json",
@@ -174,7 +183,7 @@ for (const item of targets) {
       //@ts-ignore (bun types aren't up to date)
       autoloadTsconfig: true,
       autoloadPackageJson: true,
-      target: name.replace(pkg.name, "bun") as any,
+      target: buildTarget as any,
       outfile: `dist/${name}/bin/opencode`,
       execArgv: [`--user-agent=opencode/${Script.version}`, "--use-system-ca", "--"],
       windows: {},