added emsdk patched installer

.github/workflows/docs.yml

@@ -39,10 +39,11 @@ jobs:
         run: |
           playwright install
 
+
       - name: Setup emsdk
+        shell: bash -el {0}
         run: |
-          micromamba activate pyjs-wasm
-          emsdk install ${{matrix.emsdk_ver}}
+          ./emsdk/setup_emsdk.sh ${{ matrix.emsdk_ver }} $(pwd)/emsdk_install
 
       - name: create wasm build environment
         run: |
@@ -61,9 +62,8 @@ jobs:
 
       - name: Build pyjs
         run: |
-    
-          emsdk activate ${{matrix.emsdk_ver}}
-          source $CONDA_EMSDK_DIR/emsdk_env.sh
+
+          source $(pwd)/emsdk_install/emsdk_env.sh
         
           mkdir build
           pushd build
@@ -88,8 +88,7 @@ jobs:
       - name: Build xeus-python
         run: |
 
-          emsdk activate ${{matrix.emsdk_ver}}
-          source $CONDA_EMSDK_DIR/emsdk_env.sh
+          source $(pwd)/emsdk_install/emsdk_env.sh
         
           git clone [email protected]:jupyter-xeus/xeus-python.git 
           pushd xeus-python

.github/workflows/main.yml

@@ -40,16 +40,16 @@ jobs:
           playwright install
 
       - name: Setup emsdk
+        shell: bash -el {0}
         run: |
-          micromamba activate pyjs-wasm
-          emsdk install ${{matrix.emsdk_ver}}
+          ./emsdk/setup_emsdk.sh ${{ matrix.emsdk_ver }} $(pwd)/emsdk_install
 
       - name: Build pyjs
         run: |
           micromamba activate pyjs-wasm
 
           emsdk activate ${{matrix.emsdk_ver}}
-          source $CONDA_EMSDK_DIR/emsdk_env.sh
+          source $(pwd)/emsdk_install/emsdk_env.sh
 
           micromamba create -n pyjs-build-wasm \
             --platform=emscripten-32 \

emsdk/patches/0001-Add-back-fs.findObject-and-fs.readFile-in-loadLibDat.patch

@@ -0,0 +1,44 @@
+From 0170462a78e86de9ee95017bfa7e4a3dd620a375 Mon Sep 17 00:00:00 2001
+From: Hood Chatham <[email protected]>
+Date: Fri, 2 Jun 2023 11:59:32 -0700
+Subject: [PATCH] Add back fs.findObject and fs.readFile in loadLibData
+
+See upstream PR:
+https://github.com/emscripten-core/emscripten/pull/19513
+---
+ src/library_dylink.js | 13 +++++++++++--
+ 1 file changed, 11 insertions(+), 2 deletions(-)
+
+diff --git a/src/library_dylink.js b/src/library_dylink.js
+index d7676cdc2..f616d230d 100644
+--- a/src/library_dylink.js
++++ b/src/library_dylink.js
+@@ -993,14 +993,23 @@ var LibraryDylink = {
+ #endif
+
+       // for wasm, we can use fetch for async, but for fs mode we can only imitate it
++      var libData;
+       if (handle) {
+         var data = {{{ makeGetValue('handle', C_STRUCTS.dso.file_data, '*') }}};
+         var dataSize = {{{ makeGetValue('handle', C_STRUCTS.dso.file_data_size, '*') }}};
+         if (data && dataSize) {
+-          var libData = HEAP8.slice(data, data + dataSize);
+-          return flags.loadAsync ? Promise.resolve(libData) : libData;
++          libData = HEAP8.slice(data, data + dataSize);
+         }
+       }
++      if (!libData && flags.fs && flags.fs.findObject(libName)) {
++        libData = flags.fs.readFile(libName, {encoding: 'binary'});
++        if (!(libData instanceof Uint8Array)) {
++          libData = new Uint8Array(libData);
++        }
++      }
++      if (libData) {
++        return flags.loadAsync ? Promise.resolve(libData) : libData;
++      }
+
+       var libFile = locateFile(libName);
+       if (flags.loadAsync) {
+-- 
+2.25.1
+

emsdk/patches/0001-Add-useful-error-when-symbol-resolution-fails.patch

@@ -0,0 +1,37 @@
+From a8bdb50a29062ee70c8667e4fd94dde47917f8fa Mon Sep 17 00:00:00 2001
+From: Hood Chatham <[email protected]>
+Date: Fri, 19 May 2023 12:19:00 -0700
+Subject: [PATCH] Add useful error when symbol resolution fails
+
+Currently if symbol resolution fails, we get:
+```js
+TypeError: Cannot read properties of undefined (reading 'apply')
+```
+It is very hard for newcomers to Emscripten to recognize this as a
+symbol resolution error. Even for people experienced with this message,
+it has the annoyance that it doesn't give any hint as to which symbol
+went missing.
+
+This adds a descriptive error message with the name of the missing
+symbol.
+---
+ src/library_dylink.js | 3 +++
+ 1 file changed, 3 insertions(+)
+
+diff --git a/src/library_dylink.js b/src/library_dylink.js
+index d96e6b425..7f63b5c5e 100644
+--- a/src/library_dylink.js
++++ b/src/library_dylink.js
+@@ -727,6 +727,9 @@ var LibraryDylink = {
+             var resolved;
+             stubs[prop] = function() {
+               if (!resolved) resolved = resolveSymbol(prop);
++              if (!resolved) {
++                throw new Error(`Dynamic linking error: cannot resolve symbol ${prop}`);
++              }
+               return resolved.apply(null, arguments);
+             };
+           }
+-- 
+2.25.1
+