Use IPv4 on WSL machines (#2729)

WSL has issues when handling IPv6 ips. In order to resolve this, on dev machines, we now check if it's a WSL environment. If yes, we default to using IPv4 instead of IPv6.

app/client/start-https.sh

@@ -63,24 +63,18 @@ client_proxy_pass="${default_client_proxy}"
 network_mode="bridge"
 case "${uname_out}" in
     Linux*)     machine=Linux
-
-        proc_version="$(cat /proc/version)"
-        case "$proc_version" in
-        *icrosoft*)
-            # ignore to continue using host.docker.internal
-        ;;
-        *WSL*)
+
+        source ../util/is_wsl.sh
+	      if [ $IS_WSL ]; then
             # ignore to continue using host.docker.internal
-        ;;
-        *)
+	      else
             network_mode="host"
             client_proxy_pass=$default_linux_client_proxy
             # if no server was passed
             if [[ -z $1 ]]; then
                 server_proxy_pass=$default_linux_server_proxy
             fi
-            ;;
-        esac
+	      fi
                 echo "
     Starting nginx for Linux...
     "

app/server/scripts/start-dev-server.sh

@@ -10,4 +10,9 @@ if [[ -f .env ]]; then
   source .env
 fi
 
+source ../util/is_wsl.sh
+if [ $IS_WSL ]; then
+  _JAVA_OPTIONS="-Djava.net.preferIPv4Stack=true $_JAVA_OPTIONS"
+fi
+
 (cd dist && exec java -jar server-*.jar)

app/util/is_wsl.sh

@@ -0,0 +1,13 @@
+#!/usr/bin/env bash
+
+IS_WSL=
+
+proc_version="$(cat /proc/version)"
+case "$proc_version" in
+*icrosoft*)
+    IS_WSL=true
+;;
+*WSL*)
+    IS_WSL=true
+;;
+esac

app/util/is_wsl_test.sh

@@ -0,0 +1,44 @@
+#!/usr/bin/env bash
+
+set -e
+
+DIR="$(cd "$(dirname "$0")" && pwd)"
+
+distro=
+
+cat() {
+  echo $distro
+}
+
+fail() {
+  local reason=$1
+
+  echo "${reason}
+  context: ${distro}"
+
+  exit 1
+}
+
+stub_distro() {
+  local name=$1
+
+  distro=$name
+  source $DIR/is_wsl.sh
+}
+
+stub_distro "Linux Computer 4.19.104-microsoft-standard #1 SMP Wed Feb 19 06:37:35 UTC 2020 x86_64 x86_64 x86_64 GNU/Linux"
+if [ ! $IS_WSL ]; then
+  fail "Failed: Detected lack of WSL where it should have."
+fi
+
+stub_distro "Linux Computer 4.19.104-WSL-standard #1 SMP Wed Feb 19 06:37:35 UTC 2020 x86_64 x86_64 x86_64 GNU/Linux"
+if [ ! $IS_WSL ]; then
+  fail "Failed: Detected lack of WSL where it should have."
+fi
+
+stub_distro "Linux pop-os 5.3.0-22-generic #24+system76~1573659475~19.04~26b2022-Ubuntu SMP Wed Nov 13 20:0 x86_64 x86_64 x86_64 GNU/Linux"
+if [ $IS_WSL ]; then
+  fail "Failed: Detected WSL where it shouldn't have."
+fi
+
+echo "All Tests Pass!"