docs: add WSL setup guide for Windows users with troubleshooting notes

README.md

@@ -118,6 +118,10 @@ the project ```build``` directory (```xargs rm < install_manifest.txt```).
 
 Then, you may delete the ```build``` directory to remove the built project.
 
+#### Windows via WSL
+
+_Check the [WSL setup guide](wsl-setup-guide.md) for setting up NSB on Windows using WSL2 with Ubuntu._
+
 #### Windows via vcpkg
 _Coming soon._
 

wsl-setup-guide.md

@@ -0,0 +1,196 @@
+# Setup for Windows via WSL (Ubuntu 24.04)
+
+This guide covers setting up NSB on **Windows** using **Windows Subsystem for Linux (WSL2)** with Ubuntu 24.04. Since NSB currently does not have native Windows support, WSL is the recommended way to run NSB on Windows.
+
+> **Note:** This guide assumes you have WSL2 already installed. If not, open PowerShell as Administrator and run:  
+> ```powershell
+> wsl --install -d Ubuntu-24.04
+> ```
+
+---
+
+## 0. Configure WSL Memory
+
+Building Protobuf from source requires sufficient memory. The default WSL memory allocation may cause the build to be terminated. Before starting, create or edit the file `C:\Users\<YourUsername>\.wslconfig` with the following content:
+
+```ini
+[wsl2]
+memory=4GB
+swap=4GB
+```
+
+After saving, restart WSL from PowerShell:
+```powershell
+wsl --shutdown
+```
+
+Then reopen your Ubuntu terminal.
+
+---
+
+## 1. Install System Packages
+
+```bash
+sudo apt update
+sudo apt install -y \
+  build-essential \
+  cmake \
+  pkg-config \
+  libsqlite3-dev \
+  libyaml-cpp-dev \
+  libhiredis-dev \
+  python3 \
+  python3-pip \
+  redis-server \
+  git \
+  wget
+```
+
+---
+
+## 2. Build & Install Abseil (LTS 20240116.0)
+
+```bash
+cd ~
+git clone --depth 1 --branch 20240116.0 https://github.com/abseil/abseil-cpp.git
+cd abseil-cpp
+mkdir build && cd build
+cmake .. \
+  -DCMAKE_POSITION_INDEPENDENT_CODE=ON \
+  -DCMAKE_CXX_STANDARD=17 \
+  -DCMAKE_BUILD_TYPE=Release \
+  -DABSL_ENABLE_INSTALL=ON \
+  -DBUILD_TESTING=OFF
+cmake --build . --parallel 2
+sudo cmake --install .
+sudo ldconfig
+```
+
+> **Note:** You may see a warning about `/usr/lib/wsl/lib/libcuda.so.1 is not a symbolic link` after running `ldconfig`. This is a known WSL issue and can be safely ignored.
+
+#### Sanity Check
+```bash
+ls /usr/local/lib/libabsl_log* /usr/local/lib/libabsl_base* 2>/dev/null
+```
+
+---
+
+## 3. Build & Install Protobuf v27.5
+
+```bash
+cd ~
+wget https://github.com/protocolbuffers/protobuf/releases/download/v27.5/protobuf-27.5.tar.gz
+tar -xvf protobuf-27.5.tar.gz
+cd protobuf-27.5
+mkdir build && cd build
+cmake .. \
+  -DCMAKE_BUILD_TYPE=Release \
+  -DCMAKE_POSITION_INDEPENDENT_CODE=ON \
+  -Dprotobuf_BUILD_SHARED_LIBS=ON \
+  -Dprotobuf_BUILD_TESTS=OFF \
+  -Dprotobuf_ABSL_PROVIDER=package \
+  -DCMAKE_CXX_STANDARD=17 \
+  -DCMAKE_INSTALL_PREFIX=/usr/local
+cmake --build . --parallel 2
+sudo cmake --install .
+sudo ldconfig
+```
+
+> **Important:** If the build is terminated during `cmake --build`, your WSL instance likely does not have enough memory. See [Step 0](#0-configure-wsl-memory) to increase the allocation. You can also try building with `--parallel 1` to reduce memory usage.
+
+#### Sanity Check
+```bash
+which protoc
+protoc --version      # Expect libprotoc 27.5
+ls /usr/local/lib/libprotobuf.so*
+```
+
+---
+
+## 4. Clone NSB
+
+```bash
+cd ~
+git clone https://github.com/nsb-ucsc/nsb_beta.git
+cd nsb_beta
+```
+
+---
+
+## 5. Configure & Build NSB
+
+```bash
+mkdir build && cd build
+cmake -DProtobuf_PROTOC_EXECUTABLE=/usr/local/bin/protoc ..
+cmake --build . --parallel 2
+```
+
+> **Known Issue:** On some systems, the generated protobuf files may be placed in a nested subdirectory (e.g., `cpp/proto/proto/` instead of `cpp/proto/`). If the build fails with `fatal error: nsb.pb.h: No such file or directory`, run:
+> ```bash
+> cp ~/nsb_beta/cpp/proto/proto/* ~/nsb_beta/cpp/proto/
+> cmake --build . --parallel 2
+> ```
+
+---
+
+## 6. Install NSB (Optional but Recommended)
+
+```bash
+sudo cmake --install .
+sudo ldconfig
+```
+
+Install locations:
+- Lib: `/usr/local/nsb/lib/libnsb.so`
+- Headers: `/usr/local/nsb/include/...`
+- Binary: `/usr/local/nsb/bin/nsb_daemon`
+
+---
+
+## 7. Set Up Python Environment
+
+Install the required Python packages:
+```bash
+pip3 install protobuf redis --break-system-packages
+```
+
+Copy the generated proto files to the Python source directory:
+```bash
+cp ~/nsb_beta/python/proto/proto/* ~/nsb_beta/python/proto/ 2>/dev/null
+```
+
+#### Test
+```bash
+cd ~/nsb_beta/python
+python3 -c "import proto.nsb_pb2; print('Python proto: OK')"
+```
+
+---
+
+## 8. Start Redis on Port 5050
+
+```bash
+redis-server --port 5050 --daemonize yes
+```
+
+#### Verify
+```bash
+redis-cli -p 5050 ping  # Should return: PONG
+```
+
+---
+
+## 9. Run NSB Daemon
+
+```bash
+cd ~/nsb_beta/build
+./nsb_daemon ../config.yaml
+```
+
+You should see output like:
+```
+[HH:MM:SS]    (info) Starting daemon...
+[HH:MM:SS]    (info) Server started on port 65432
+```
+
+NSB is now running and ready for use. You can connect clients from another terminal using the Python or C++ client APIs.