build: use subshells when changing directories

This prevents being left in the wrong directory in case of error.

aio/aio-builds-setup/scripts/test.sh

@@ -5,7 +5,8 @@ set -eux -o pipefail
 source "`dirname $0`/_env.sh"
 
 # Test `scripts-js/`
+(
   cd "$SCRIPTS_JS_DIR"
   yarn install
   yarn test
-cd -
+)

aio/aio-builds-setup/scripts/travis-preverify-pr.sh

@@ -5,10 +5,11 @@ set -eux -o pipefail
 source "`dirname $0`/_env.sh"
 
 # Build `scripts-js/`
+(
   cd "$SCRIPTS_JS_DIR"
   yarn install
   yarn build
-cd -
+)
 
 # Preverify PR
 AIO_GITHUB_ORGANIZATION="angular" \

aio/scripts/deploy-preview.sh

@@ -15,6 +15,7 @@ readonly PREVERIFY_SCRIPT=aio-builds-setup/scripts/travis-preverify-pr.sh
 readonly skipBuild=$([[ "$1" == "--skip-build" ]] && echo "true" || echo "");
 readonly relevantChangedFilesCount=$(git diff --name-only $TRAVIS_COMMIT_RANGE | grep -P "^(?:aio|packages)/(?!.*[._]spec\.[jt]s$)" | wc -l)
 
+(
   cd "`dirname $0`/.."
 
   # Do not deploy unless this PR has touched relevant files: `aio/` or `packages/` (except for spec files)
@@ -69,5 +70,4 @@ fi
 
   # Run PWA-score tests
   yarn test-pwa-score -- "$DEPLOYED_URL" "$MIN_PWA_SCORE"
-
+)
-cd -

aio/scripts/deploy-staging.sh

@@ -7,6 +7,7 @@ set +x -eu -o pipefail
 FIREBASE_PROJECT_ID=aio-staging
 DEPLOYED_URL=https://$FIREBASE_PROJECT_ID.firebaseapp.com
 
+(
   cd "`dirname $0`/.."
 
   # Build the app
@@ -20,5 +21,4 @@ firebase deploy --message "Commit: $TRAVIS_COMMIT" --non-interactive --token "$F
   # TODO(gkalpak): Figure out why this fails and re-enable.
   sleep 10
   yarn test-pwa-score -- "$DEPLOYED_URL" "$MIN_PWA_SCORE" || true
-
+)
-cd -

build.sh

@@ -362,6 +362,7 @@ if [[ ${BUILD_ALL} == true && ${TYPECHECK_ALL} == true ]]; then
   travisFoldStart "copy e2e files" "no-xtrace"
     mkdir -p ./dist/all/
 
+    (
       echo "====== Copying files needed for e2e tests ====="
       cp -r ./modules/playground ./dist/all/
       cp -r ./modules/playground/favicon.ico ./dist/
@@ -377,8 +378,9 @@ if [[ ${BUILD_ALL} == true && ${TYPECHECK_ALL} == true ]]; then
       ln -s ../../../../node_modules/rxjs .
       ln -s ../../../../node_modules/angular/angular.js .
       ln -s ../../../../node_modules/hammerjs/hammer.js .
-    cd -
+    )
 
+    (
       echo "====== Copying files needed for benchmarks ====="
       cp -r ./modules/benchmarks ./dist/all/
       cp -r ./modules/benchmarks/favicon.ico ./dist/
@@ -393,7 +395,7 @@ if [[ ${BUILD_ALL} == true && ${TYPECHECK_ALL} == true ]]; then
       ln -s ../../../../node_modules/angular/angular.js .
       ln -s ../../../../bower_components/polymer .
       ln -s ../../../../node_modules/incremental-dom/dist/incremental-dom-cjs.js
-    cd -
+    )
   travisFoldEnd "copy e2e files"
 
   TSCONFIG="packages/tsconfig.json"

scripts/ci/build.sh

@@ -40,6 +40,7 @@ travisFoldEnd "tsc a bunch of useless stuff"
 # Build angular.io
 if [[ ${CI_MODE:-} == "aio" ]]; then
   travisFoldStart "build.aio"
+  (
     cd "`dirname $0`/../../aio"
     yarn build
 
@@ -52,7 +53,6 @@ if [[ ${CI_MODE:-} == "aio" ]]; then
         yarn deploy-preview -- --skip-build
       travisFoldEnd "deploy.aio.pr-preview"
     fi
-
+  )
-    cd -
   travisFoldEnd "build.aio"
 fi

tools/code.angularjs.org/publish.sh

@@ -30,11 +30,12 @@ function prepare {
 
 
   if [ -d "$REPO_DIR" ]; then
+    (
       cd $REPO_DIR
       git fetch --update-shallow origin
       git checkout master
       git merge --ff-only origin/master
-    cd -
+    )
   else
     echo "-- Cloning code.angularjs.org into $REPO_DIR"
     git clone git@github.com:angular/code.angularjs.org.git $REPO_DIR --depth=1