install.sh: Fix up the Rosetta workaround

Looks like we're running into the env vars disappearing thing again.
Just re-launch the whole script...

Signed-off-by: Hector Martin <[email protected]>

Author: marcan

src/install.sh

@@ -3,6 +3,8 @@
 
 set -e
 
+cd "$(dirname "$0")"
+
 export LC_ALL=UTF-8
 export LANG=UTF-8
 
@@ -14,8 +16,6 @@ export SSL_CERT_FILE=$PWD/Frameworks/Python.framework/Versions/Current/etc/opens
 # so do it again for good measure.
 export PATH="$PWD/bin:/usr/bin:/bin:/usr/sbin:/sbin:$PATH"
 
-arch=
-
 if ! arch -arm64 ls >/dev/null 2>/dev/null; then
     echo
     echo "Looks like this is an Intel Mac!"
@@ -28,8 +28,10 @@ if [ $(arch) != "arm64" ]; then
     echo
     echo "You're running the installer in Intel mode under Rosetta!"
     echo "Don't worry, we can fix that for you. Switching to ARM64 mode..."
-    arch="arch -arm64"
+
+    # This loses env vars in some security states, so just re-launch ourselves
+    exec arch -arm64 ./install.sh
 fi
 
 exec </dev/tty >/dev/tty 2>/dev/tty
-exec $arch $python main.py "$@"
+exec $python main.py "$@"