Fix wasm build instructions (#230)

Author: mcbarton

CONTRIBUTING.md

@@ -68,23 +68,21 @@ git clone https://github.com/<your-github-username>/xeus-cpp.git
 cd ./xeus-cpp
 ```
 
-You'll now want to make sure you're using emsdk version "3.1.45" and activate it. You can get this by executing the following
+You'll now want to make sure you are using the same emsdk as the rest of our dependencies. This can be achieved by executing 
+the following
 ```bash
-cd $HOME
-git clone https://github.com/emscripten-core/emsdk.git
-cd emsdk
-./emsdk install 3.1.45
-./emsdk activate 3.1.45
-source $HOME/emsdk/emsdk_env.sh
+micromamba create -f environment-wasm-build.yml -y
+micromamba activate xeus-cpp-wasm-build
 ```
 
 You are now in a position to build the xeus-cpp kernel. You build it by executing the following
 ```bash
 micromamba create -f environment-wasm-host.yml --platform=emscripten-wasm32
 mkdir build
-pushd build
-export PREFIX=$MAMBA_ROOT_PREFIX/envs/xeus-cpp-wasm-host 
-export SYSROOT_PATH=$HOME/emsdk/upstream/emscripten/cache/sysroot
+cd build
+export BUILD_TOOLS_PREFIX=$MAMBA_ROOT_PREFIX/envs/xeus-cpp-wasm-build
+export PREFIX=$MAMBA_ROOT_PREFIX/envs/xeus-cpp-wasm-host
+export SYSROOT_PATH=$BUILD_TOOLS_PREFIX/opt/emsdk/upstream/emscripten/cache/sysroot
 
 emcmake cmake \
         -DCMAKE_BUILD_TYPE=Release                        \
@@ -98,7 +96,7 @@ emmake make install
 
 To build Jupyter Lite with this kernel without creating a website you can execute the following
 ```bash
-micromamba create -n xeus-lite-host jupyterlite-core
+micromamba create -n xeus-lite-host jupyterlite-core -c conda-forge
 micromamba activate xeus-lite-host
 python -m pip install jupyterlite-xeus
 jupyter lite build --XeusAddon.prefix=$PREFIX

README.md

@@ -69,23 +69,21 @@ git clone --depth=1 https://github.com/compiler-research/xeus-cpp.git
 cd ./xeus-cpp
 ```
 
-You'll now want to make sure you're using emsdk version "3.1.45" and activate it. You can get this by executing the following
+You'll now want to make sure you are using the same emsdk as the rest of our dependencies. This can be achieved by executing 
+the following
 ```bash
-cd $HOME
-git clone https://github.com/emscripten-core/emsdk.git
-cd emsdk
-./emsdk install 3.1.45
-./emsdk activate 3.1.45
-source $HOME/emsdk/emsdk_env.sh
+micromamba create -f environment-wasm-build.yml -y
+micromamba activate xeus-cpp-wasm-build
 ```
 
 You are now in a position to build the xeus-cpp kernel. You build it by executing the following
 ```bash
 micromamba create -f environment-wasm-host.yml --platform=emscripten-wasm32
 mkdir build
-pushd build
-export PREFIX=$MAMBA_ROOT_PREFIX/envs/xeus-cpp-wasm-host 
-export SYSROOT_PATH=$HOME/emsdk/upstream/emscripten/cache/sysroot
+cd build
+export BUILD_TOOLS_PREFIX=$MAMBA_ROOT_PREFIX/envs/xeus-cpp-wasm-build
+export PREFIX=$MAMBA_ROOT_PREFIX/envs/xeus-cpp-wasm-host
+export SYSROOT_PATH=$BUILD_TOOLS_PREFIX/opt/emsdk/upstream/emscripten/cache/sysroot
 
 emcmake cmake \
         -DCMAKE_BUILD_TYPE=Release                        \
@@ -99,7 +97,7 @@ emmake make install
 
 To build Jupyter Lite with this kernel without creating a website you can execute the following
 ```bash
-micromamba create -n xeus-lite-host jupyterlite-core
+micromamba create -n xeus-lite-host jupyterlite-core -c conda-forge
 micromamba activate xeus-lite-host
 python -m pip install jupyterlite-xeus
 jupyter lite build --XeusAddon.prefix=$PREFIX

docs/source/InstallationAndUsage.rst

@@ -53,27 +53,25 @@ These instructions will assume you have cmake installed on your system. First cl
     cd ./xeus-cpp
 
 
-You'll now want to make sure you're using emsdk version "3.1.45" and activate it. You can get this by executing the following
+You'll now want to make sure you are using the same emsdk as the rest of our dependencies. This can be achieved by executing 
+the following
 
 .. code-block:: bash
 
-    cd $HOME
-    git clone https://github.com/emscripten-core/emsdk.git
-    cd emsdk
-    ./emsdk install 3.1.45
-    ./emsdk activate 3.1.45
-    source $HOME/emsdk/emsdk_env.sh
 
+    micromamba create -f environment-wasm-build.yml -y
+    micromamba activate xeus-cpp-wasm-build
 
 You are now in a position to build the xeus-cpp kernel. You build it by executing the following
 
 .. code-block:: bash
 
     micromamba create -f environment-wasm-host.yml --platform=emscripten-wasm32
     mkdir build
-    pushd build
-    export PREFIX=$MAMBA_ROOT_PREFIX/envs/xeus-cpp-wasm-host 
-    export SYSROOT_PATH=$HOME/emsdk/upstream/emscripten/cache/sysroot
+    cd build
+    export BUILD_TOOLS_PREFIX=$MAMBA_ROOT_PREFIX/envs/xeus-cpp-wasm-build
+    export PREFIX=$MAMBA_ROOT_PREFIX/envs/xeus-cpp-wasm-host
+    export SYSROOT_PATH=$BUILD_TOOLS_PREFIX/opt/emsdk/upstream/emscripten/cache/sysroot
     emcmake cmake \
             -DCMAKE_BUILD_TYPE=Release                        \
             -DCMAKE_INSTALL_PREFIX=$PREFIX                    \
@@ -88,7 +86,7 @@ To build Jupyter Lite with this kernel without creating a website you can execut
 
 .. code-block:: bash
 
-    micromamba create -n xeus-lite-host jupyterlite-core
+    micromamba create -n xeus-lite-host jupyterlite-core -c conda-forge
     micromamba activate xeus-lite-host
     python -m pip install jupyterlite-xeus
     jupyter lite build --XeusAddon.prefix=$PREFIX