fix: add crossplatform `prei18n-extract` script (#3728)

* fix: 🐛 add crossplatform `prei18n-extract` script

* fix: 🚨 add newline

* Revert "fix: 🐛 add crossplatform `prei18n-extract` script"

This reverts commit 201bd2308a3caf648368b3945d5b73d8cb46c816.

* build: 📦 add `shx` as dev dep, use it in `prei18n:extract` script

* fix: 🐛 use platform-specific commands for prei18n-extract

package.json

@@ -9,7 +9,7 @@
     "contracts:compile:v3": "typechain --target ethers-v5 --out-dir src/types/v3 \"./node_modules/@uniswap/**/artifacts/contracts/**/*[!dbg].json\"",
     "contracts:compile": "yarn contracts:compile:abi && yarn contracts:compile:v3",
     "graphql:generate": "graphql-codegen --config codegen.yml",
-    "prei18n:extract": "touch src/locales/en-US.po",
+    "prei18n:extract": "node prei18n-extract.js",
     "i18n:extract": "lingui extract --locale en-US",
     "i18n:compile": "yarn i18n:extract && lingui compile",
     "i18n:pseudo": "lingui extract --locale pseudo && lingui compile",

prei18n-extract.js

+// eslint-disable-next-line @typescript-eslint/no-var-requires
+const exec = require('child_process').exec
+const isWindows = process.platform === 'win32' || /^(msys|cygwin)$/.test(process.env.OSTYPE)
+
+if (isWindows) {
+  exec(`type nul > src/locales/en-US.po`)
+} else {
+  exec(`touch src/locales/en-US.po`)
+}