Fix Rustup installation on Windows

Author: Xanewok

.travis.yml

@@ -12,16 +12,17 @@ language: node_js
 
 node_js:
   # - 10.2 # Lock to the version shipped with VSCode 1.31+
-  # ... except we need to work around https://github.com/nodejs/node/issues/20498
+  # ...except we need to work around https://github.com/nodejs/node/issues/20498
   # and include the newer version which unbreaks our testing flow
   - 10.5
 
 services:
   - xvfb # Required for VSCode extension tests
 
 before_install:
-  - curl https://sh.rustup.rs -sSf -m 60 | sh -s -- --no-modify-path -y -v --default-toolchain stable
-  - source $HOME/.cargo/env
+  - curl https://sh.rustup.rs -sSf -m 60 | sh -s -- -y -v --default-toolchain stable
+  - if [[ "$TRAVIS_OS_NAME" == "windows" ]]; then HOME="/c/Users/travis"; fi
+  - export PATH="$HOME/.cargo/bin:$PATH"
 
 script:
   - npm run compile