[Client] Raspberry-Pi support

[EmmaVye]

A clear and concise description of what the problem is.
I would like to be able to bridge my raspberry pi with my network to broadcast a relay from Ethernet to Wi-Fi, I currently have the bridge working but I was looking forward that the appimage would work on the Raspberry-Pi but it does not
A clear and concise description of what you want to happen.

A clear and concise description of any alternative solutions or features you've considered.
Ive considered other vpn options but I alredy have a outline server running in the cloud so that would mean I would need to restart all over

Add any other context or screenshots about the feature request here.
not really it does output a garbled filename with nothing in it so I guess that is a bug?

[ghost]

+1.
Need this.

[nafanz]

It's been 4 years already, I wonder if there's any movement in this direction?

I really miss the Raspberry support.

[q4a]

HUGE note: I'm mostly C++ dev and this instruction may contain mistakes.

There is no any problems with adding arm64 support. I don't have any Raspberry Pi, but have other arm64 SBC - Rock 5B.
Here is my changes, that required to build arm64 AppImage:

diff --git a/client/electron/electron-builder.json b/client/electron/electron-builder.json
index b2227c1e..1631f6b9 100644
--- a/client/electron/electron-builder.json
+++ b/client/electron/electron-builder.json
@@ -37,12 +37,9 @@
     "maintainer": "Jigsaw LLC",
     "target": [{
       "arch": [
-        "x64"
+        "arm64"
       ],
       "target": "AppImage"
-    }, {
-      "arch": "x64",
-      "target": "deb"
     }]
   },
 
diff --git a/client/go/Taskfile.yml b/client/go/Taskfile.yml
index 5994e02e..67f30f16 100644
--- a/client/go/Taskfile.yml
+++ b/client/go/Taskfile.yml
@@ -63,7 +63,7 @@ tasks:
 
   linux:
     desc: "Build the tun2socks binary and library for Linux"
-    cmds: [{task: electron, vars: {TARGET_OS: "linux", TARGET_ARCH: "amd64"}}]
+    cmds: [{task: electron, vars: {TARGET_OS: "linux", TARGET_ARCH: "arm64"}}]
 
   android:
     desc: "Build the tun2socks.aar library for Android"

deb target was removed because of this bug:
electron-userland/electron-builder#3901
I hope that @sbruens or @jyyi1 can check my changes and make it better/add cross compilation.
There is another option - use github arm64 CI, when it will be available:
github/roadmap#970
Until then I'll save arm64 debug build here:
https://github.com/q4a/outline-apps/releases/download/arm64-debug-2025-01-02/Outline-Client-arm64.AppImage
And write my build steps performed on the arm64 Ubuntu 24.10:

$ sudo apt install git curl golang-go gcc make libboost1.83-dev libboost-json1.83-dev libboost-regex1.83-dev libboost-program-options1.83-dev libboost-filesystem1.83-dev libboost-coroutine1.83-dev
$ git clone https://github.com/Jigsaw-Code/outline-apps
$ cd outline-apps
<apply arm64 changes>
$ curl -o- https://raw.githubusercontent.com/nvm-sh/nvm/v0.40.1/install.sh | bash
$ source ~/.bashrc
$ nvm install --latest-npm
$ npm -v
10.9.2
$ node -v
v18.20.5
$ npm ci
$ mkdir client/electron/linux_proxy_controller/build
$ cd client/electron/linux_proxy_controller/build
$ cmake .. -DCMAKE_BUILD_TYPE=Release -DCMAKE_CXX_FLAGS="-static -static-libgcc -static-libstdc++"
$ make -j$(nproc)
$ cp OutlineProxyController ../dist/
$ file ../dist/OutlineProxyController && ldd ../dist/OutlineProxyController
../dist/OutlineProxyController: ELF 64-bit LSB executable, ARM aarch64, version 1 (GNU/Linux), statically linked, BuildID[sha1]=4c4b3d4f52d7d73893bcda6546d0c51dda493565, for GNU/Linux 3.7.0, with debug_info, not stripped
        not a dynamic executable
$ cd ../../../../../outline-apps
$ npm run action client/electron/build linux
<check output/client/electron/build/Outline-Client.AppImage>

UPD: looks like OutlineProxyController in linux_proxy_controller/dist is x64_86 and you need to rebuild it too. So, I updated my build steps.

[nafanz]

@q4a
Thanks for your help, it works.
I hope to make the arm64 build official in the near future.

Information about the board and software:

Raspberry Pi 4 Model B Rev 1.4
PRETTY_NAME="Debian GNU/Linux 12 (bookworm)"
NAME="Debian GNU/Linux"
VERSION_ID="12"
VERSION="12 (bookworm)"

[q4a]

Gitbub Фctions now support free arm64 Linux runners - that allow to build and test arm64 version:
https://github.blog/changelog/2025-01-16-linux-arm64-hosted-runners-now-available-for-free-in-public-repositories-public-preview/
So I made PR to add arm64 Linux support: #2342