Fix build:wasm:dev for --dev builds (#6038)

This is useful since it preserves Rust backtraces in WASM.

package.json

@@ -94,9 +94,11 @@
     "fetch:wasm": "./scripts/get-latest-wasm-bundle.sh",
     "fetch:wasm:windows": "./scripts/get-latest-wasm-bundle.ps1",
     "fetch:samples": "rm -rf public/kcl-samples* && curl -L -o public/kcl-samples.zip https://github.com/KittyCAD/kcl-samples/archive/refs/heads/achalmers/kw-args-xylineto.zip && unzip -o public/kcl-samples.zip -d public && mv public/kcl-samples-* public/kcl-samples",
-    "build:wasm-dev": "yarn wasm-prep && (cd rust && wasm-pack build kcl-wasm-lib --dev --target web --out-dir pkg && cargo test -p kcl-lib export_bindings) && yarn isomorphic-copy-wasm && yarn fmt:generated",
     "build:wasm": "./scripts/build-wasm.sh",
     "build:wasm:windows": "./scripts/build-wasm.ps1",
+    "build:wasm-dev": "yarn build:wasm:dev",
+    "build:wasm:dev": "./scripts/build-wasm-dev.sh",
+    "build:wasm:dev:windows": "./scripts/build-wasm-dev.ps1",
     "remove-importmeta": "sed -i 's/import.meta.url/window.location.origin/g' \"./rust/kcl-wasm-lib/pkg/kcl_wasm_lib.js\"; sed -i '' 's/import.meta.url/window.location.origin/g' \"./rust/kcl-wasm-lib/pkg/kcl_wasm_lib.js\" || echo \"sed for both mac and linux\"",
     "lint-fix": "eslint --fix --ext .ts --ext .tsx src e2e packages/codemirror-lsp-client/src rust/kcl-language-server/client/src",
     "lint": "eslint --max-warnings 0 --ext .ts --ext .tsx src e2e packages/codemirror-lsp-client/src rust/kcl-language-server/client/src",

scripts/build-wasm-dev.ps1

@@ -0,0 +1,18 @@
+# Stop the script when a cmdlet or a native command fails
+# from https://www.meziantou.net/stop-the-script-when-an-error-occurs-in-powershell.htm
+$ErrorActionPreference = 'Stop'
+$PSNativeCommandUseErrorActionPreference = $true
+
+rm -Recurse -Force rust/kcl-wasm-lib/pkg
+mkdir -p rust/kcl-wasm-lib/pkg
+rm -Recurse -Force rust/kcl-lib/bindings
+
+cd rust
+$env:RUSTFLAGS='--cfg getrandom_backend="wasm_js"'
+wasm-pack build kcl-wasm-lib --dev --target web --out-dir pkg
+$env:RUSTFLAGS=''
+cargo test -p kcl-lib export_bindings
+cd ..
+
+copy rust\kcl-wasm-lib\pkg\kcl_wasm_lib_bg.wasm public
+yarn fmt:generated

scripts/build-wasm-dev.sh

@@ -0,0 +1,16 @@
+#!/bin/bash
+set -euo pipefail
+
+rm -rf rust/kcl-wasm-lib/pkg
+mkdir -p rust/kcl-wasm-lib/pkg
+rm -rf rust/kcl-lib/bindings
+
+cd rust
+export RUSTFLAGS='--cfg getrandom_backend="wasm_js"'
+wasm-pack build kcl-wasm-lib --dev --target web --out-dir pkg
+export RUSTFLAGS=''
+cargo test -p kcl-lib export_bindings
+cd ..
+
+cp rust/kcl-wasm-lib/pkg/kcl_wasm_lib_bg.wasm public
+yarn fmt:generated