Fix Shellcheck SC2086: Quote to prevent splitting

Double quote to prevent globbing and word splitting.

https://github.com/koalaman/shellcheck/wiki/SC2086

Signed-off-by: Dan Callahan <danc@element.io>

13 files changed, 42 insertions, 42 deletions

diff --git a/.ci/scripts/test_export_data_command.sh b/.ci/scripts/test_export_data_command.sh
index 2180072c06..468a9d61ff 100755
--- a/.ci/scripts/test_export_data_command.sh
+++ b/.ci/scripts/test_export_data_command.sh
@@ -3,7 +3,7 @@
 # Test for the export-data admin command against sqlite and postgres
 
 set -xe
-cd "`dirname $0`/../.."
+cd "`dirname "$0"`/../.."
 
 echo "--- Install dependencies"
 
diff --git a/.ci/scripts/test_synapse_port_db.sh b/.ci/scripts/test_synapse_port_db.sh
index 7bcbe63654..3926a17eab 100755
--- a/.ci/scripts/test_synapse_port_db.sh
+++ b/.ci/scripts/test_synapse_port_db.sh
@@ -7,7 +7,7 @@
 
 
 set -xe
-cd "`dirname $0`/../.."
+cd "`dirname "$0"`/../.."
 
 echo "--- Install dependencies"
 
diff --git a/debian/build_virtualenv b/debian/build_virtualenv
index e006b48849..575c2e016d 100755
--- a/debian/build_virtualenv
+++ b/debian/build_virtualenv
@@ -98,7 +98,7 @@ esac
         --output-file="${PACKAGE_BUILD_DIR}/etc/matrix-synapse/log.yaml"
 
 # add a dependency on the right version of python to substvars.
-PYPKG=`basename $SNAKE`
+PYPKG=`basename "$SNAKE"`
 echo "synapse:pydepends=$PYPKG" >> debian/matrix-synapse-py3.substvars
 
 
diff --git a/demo/clean.sh b/demo/clean.sh
index 99482e87d3..e9b440d90d 100755
--- a/demo/clean.sh
+++ b/demo/clean.sh
@@ -6,14 +6,14 @@ DIR="$( cd "$( dirname "$0" )" && pwd )"
 
 PID_FILE="$DIR/servers.pid"
 
-if [ -f $PID_FILE ]; then
+if [ -f "$PID_FILE" ]; then
     echo "servers.pid exists!"
     exit 1
 fi
 
 for port in 8080 8081 8082; do
-    rm -rf ${DIR:?}/$port
-    rm -rf $DIR/media_store.$port
+    rm -rf "${DIR:?}/$port"
+    rm -rf "$DIR/media_store.$port"
 done
 
-rm -rf ${DIR:?}/etc
+rm -rf "${DIR:?}/etc"
diff --git a/demo/start.sh b/demo/start.sh
index 245e9d777b..03c3b375cf 100755
--- a/demo/start.sh
+++ b/demo/start.sh
@@ -12,7 +12,7 @@ PYTHONPATH=$(readlink -f "$(pwd)")
 export PYTHONPATH
 
 
-echo $PYTHONPATH
+echo "$PYTHONPATH"
 
 for port in 8080 8081 8082; do
     echo "Starting server on port $port... "
@@ -28,12 +28,12 @@ for port in 8080 8081 8082; do
         --config-path "$DIR/etc/$port.config" \
         --report-stats no
 
-    if ! grep -F "Customisation made by demo/start.sh" -q  $DIR/etc/$port.config; then
-        printf '\n\n# Customisation made by demo/start.sh\n' >> $DIR/etc/$port.config
+    if ! grep -F "Customisation made by demo/start.sh" -q "$DIR/etc/$port.config"; then
+        printf '\n\n# Customisation made by demo/start.sh\n' >> "$DIR/etc/$port.config"
 
-        echo "public_baseurl: http://localhost:$port/" >> $DIR/etc/$port.config
+        echo "public_baseurl: http://localhost:$port/" >> "$DIR/etc/$port.config"
 
-        echo 'enable_registration: true' >> $DIR/etc/$port.config
+        echo 'enable_registration: true' >> "$DIR/etc/$port.config"
 
         # Warning, this heredoc depends on the interaction of tabs and spaces. Please don't
         # accidentaly bork me with your fancy settings.
@@ -57,26 +57,26 @@ for port in 8080 8081 8082; do
 		        compress: false
 		PORTLISTENERS
 		)
-        echo "${listeners}" >> $DIR/etc/$port.config
+        echo "${listeners}" >> "$DIR/etc/$port.config"
 
         # Disable tls for the servers
-        printf '\n\n# Disable tls on the servers.' >> $DIR/etc/$port.config
-        echo '# DO NOT USE IN PRODUCTION' >> $DIR/etc/$port.config
-        echo 'use_insecure_ssl_client_just_for_testing_do_not_use: true' >> $DIR/etc/$port.config
-        echo 'federation_verify_certificates: false' >> $DIR/etc/$port.config
+        printf '\n\n# Disable tls on the servers.' >> "$DIR/etc/$port.config"
+        echo '# DO NOT USE IN PRODUCTION' >> "$DIR/etc/$port.config"
+        echo 'use_insecure_ssl_client_just_for_testing_do_not_use: true' >> "$DIR/etc/$port.config"
+        echo 'federation_verify_certificates: false' >> "$DIR/etc/$port.config"
 
         # Set tls paths
-        echo "tls_certificate_path: \"$DIR/etc/localhost:$https_port.tls.crt\"" >> $DIR/etc/$port.config
-        echo "tls_private_key_path: \"$DIR/etc/localhost:$https_port.tls.key\"" >> $DIR/etc/$port.config
+        echo "tls_certificate_path: \"$DIR/etc/localhost:$https_port.tls.crt\"" >> "$DIR/etc/$port.config"
+        echo "tls_private_key_path: \"$DIR/etc/localhost:$https_port.tls.key\"" >> "$DIR/etc/$port.config"
 
         # Generate tls keys
-        openssl req -x509 -newkey rsa:4096 -keyout $DIR/etc/localhost:$https_port.tls.key -out $DIR/etc/localhost:$https_port.tls.crt -days 365 -nodes -subj "/O=matrix"
+        openssl req -x509 -newkey rsa:4096 -keyout "$DIR/etc/localhost:$https_port.tls.key" -out "$DIR/etc/localhost:$https_port.tls.crt" -days 365 -nodes -subj "/O=matrix"
 
         # Ignore keys from the trusted keys server
-        echo '# Ignore keys from the trusted keys server' >> $DIR/etc/$port.config
-        echo 'trusted_key_servers:' >> $DIR/etc/$port.config
-        echo '  - server_name: "matrix.org"' >> $DIR/etc/$port.config
-        echo '    accept_keys_insecurely: true' >> $DIR/etc/$port.config
+        echo '# Ignore keys from the trusted keys server' >> "$DIR/etc/$port.config"
+        echo 'trusted_key_servers:' >> "$DIR/etc/$port.config"
+        echo '  - server_name: "matrix.org"' >> "$DIR/etc/$port.config"
+        echo '    accept_keys_insecurely: true' >> "$DIR/etc/$port.config"
 
         # Reduce the blacklist
         blacklist=$(cat <<-BLACK
@@ -91,12 +91,12 @@ for port in 8080 8081 8082; do
 		  - 'fc00::/7'
 		BLACK
 		)
-        echo "${blacklist}" >> $DIR/etc/$port.config
+        echo "${blacklist}" >> "$DIR/etc/$port.config"
     fi
 
     # Check script parameters
     if [ $# -eq 1 ]; then
-        if [ $1 = "--no-rate-limit" ]; then
+        if [ "$1" = "--no-rate-limit" ]; then
 
             # Disable any rate limiting
             ratelimiting=$(cat <<-RC
@@ -138,15 +138,15 @@ for port in 8080 8081 8082; do
 			    burst_count: 1000
 			RC
 			)
-            echo "${ratelimiting}" >> $DIR/etc/$port.config
+            echo "${ratelimiting}" >> "$DIR/etc/$port.config"
         fi
     fi
 
-    if ! grep -F "full_twisted_stacktraces" -q  $DIR/etc/$port.config; then
-        echo "full_twisted_stacktraces: true" >> $DIR/etc/$port.config
+    if ! grep -F "full_twisted_stacktraces" -q  "$DIR/etc/$port.config"; then
+        echo "full_twisted_stacktraces: true" >> "$DIR/etc/$port.config"
     fi
-    if ! grep -F "report_stats" -q  $DIR/etc/$port.config ; then
-        echo "report_stats: false" >> $DIR/etc/$port.config
+    if ! grep -F "report_stats" -q  "$DIR/etc/$port.config" ; then
+        echo "report_stats: false" >> "$DIR/etc/$port.config"
     fi
 
     python3 -m synapse.app.homeserver \
diff --git a/demo/stop.sh b/demo/stop.sh
index f9dddc5914..c97e4b8d00 100755
--- a/demo/stop.sh
+++ b/demo/stop.sh
@@ -8,7 +8,7 @@ for pid_file in $FILES; do
     pid=$(cat "$pid_file")
     if [[ $pid ]]; then
         echo "Killing $pid_file with $pid"
-        kill $pid
+        kill "$pid"
     fi
 done
 
diff --git a/docker/build_debian.sh b/docker/build_debian.sh
index 1d0be42cfc..32ad07a0cc 100644
--- a/docker/build_debian.sh
+++ b/docker/build_debian.sh
@@ -5,7 +5,7 @@
 set -ex
 
 # Get the codename from distro env
-DIST=`cut -d ':' -f2 <<< ${distro:?}`
+DIST=`cut -d ':' -f2 <<< "${distro:?}"`
 
 # we get a read-only copy of the source: make a writeable copy
 cp -aT /synapse/source /synapse/build
diff --git a/scripts-dev/check-newsfragment b/scripts-dev/check-newsfragment
index 56600de0ad..5fc68e3213 100755
--- a/scripts-dev/check-newsfragment
+++ b/scripts-dev/check-newsfragment
@@ -44,8 +44,8 @@ echo
 matched=0
 for f in `git diff --name-only FETCH_HEAD... -- changelog.d`; do
     # check that any modified newsfiles on this branch end with a full stop.
-    lastchar=`tr -d '\n' < $f | tail -c 1`
-    if [ $lastchar != '.' ] && [ $lastchar != '!' ]; then
+    lastchar=`tr -d '\n' < "$f" | tail -c 1`
+    if [ "$lastchar" != '.' ] && [ "$lastchar" != '!' ]; then
         echo -e "\e[31mERROR: newsfragment $f does not end with a '.' or '!'\e[39m" >&2
         echo -e "$CONTRIBUTING_GUIDE_TEXT" >&2
         exit 1
diff --git a/scripts-dev/check_line_terminators.sh b/scripts-dev/check_line_terminators.sh
index 068f157ea1..b48fb88b07 100755
--- a/scripts-dev/check_line_terminators.sh
+++ b/scripts-dev/check_line_terminators.sh
@@ -25,7 +25,7 @@
 # terminators are found, 0 otherwise.
 
 # cd to the root of the repository
-cd "`dirname $0`/.." || exit
+cd "`dirname "$0"`/.." || exit
 
 # Find and print files with non-unix line terminators
 if find . -path './.git/*' -prune -o -type f -print0 | xargs -0 grep -I -l $'\r$'; then
diff --git a/scripts-dev/complement.sh b/scripts-dev/complement.sh
index 89af7a4fde..7d38b39e90 100755
--- a/scripts-dev/complement.sh
+++ b/scripts-dev/complement.sh
@@ -24,7 +24,7 @@
 set -e
 
 # Change to the repository root
-cd "$(dirname $0)/.."
+cd "$(dirname "$0")/.."
 
 # Check for a user-specified Complement checkout
 if [[ -z "$COMPLEMENT_DIR" ]]; then
@@ -61,8 +61,8 @@ cd "$COMPLEMENT_DIR"
 EXTRA_COMPLEMENT_ARGS=""
 if [[ -n "$1" ]]; then
   # A test name regex has been set, supply it to Complement
-  EXTRA_COMPLEMENT_ARGS+="-run $1 "
+  EXTRA_COMPLEMENT_ARGS=(-run "$1")
 fi
 
 # Run the tests!
-go test -v -tags synapse_blacklist,msc2946,msc3083,msc2403,msc2716 -count=1 $EXTRA_COMPLEMENT_ARGS ./tests/...
+go test -v -tags synapse_blacklist,msc2946,msc3083,msc2403,msc2716 -count=1 "${EXTRA_COMPLEMENT_ARGS[@]}" ./tests/...
diff --git a/scripts-dev/config-lint.sh b/scripts-dev/config-lint.sh
index 15c8c2f93a..7fb6ab68ef 100755
--- a/scripts-dev/config-lint.sh
+++ b/scripts-dev/config-lint.sh
@@ -3,7 +3,7 @@
 # Exits with 0 if there are no problems, or another code otherwise.
 
 # cd to the root of the repository
-cd "`dirname $0`/.." || exit
+cd "`dirname "$0"`/.." || exit
 
 # Restore backup of sample config upon script exit
 trap "mv docs/sample_config.yaml.bak docs/sample_config.yaml" EXIT
diff --git a/scripts-dev/docker_update_debian_changelog.sh b/scripts-dev/docker_update_debian_changelog.sh
index 14c155aee5..729f8fc467 100755
--- a/scripts-dev/docker_update_debian_changelog.sh
+++ b/scripts-dev/docker_update_debian_changelog.sh
@@ -60,5 +60,5 @@ DEBIAN_FRONTEND=noninteractive apt-get install -y devscripts
 
 # Update the Debian changelog.
 ver=${1}
-dch -M -v "$(sed -Ee 's/(rc|a|b|c)/~\1/' <<<$ver)" "New synapse release $ver."
+dch -M -v "$(sed -Ee 's/(rc|a|b|c)/~\1/' <<<"$ver")" "New synapse release $ver."
 dch -M -r -D stable ""
diff --git a/scripts-dev/generate_sample_config b/scripts-dev/generate_sample_config
index 06e4c8c669..69d0b632df 100755
--- a/scripts-dev/generate_sample_config
+++ b/scripts-dev/generate_sample_config
@@ -4,7 +4,7 @@
 
 set -e
 
-cd "`dirname $0`/.."
+cd "`dirname "$0"`/.."
 
 SAMPLE_CONFIG="docs/sample_config.yaml"
 SAMPLE_LOG_CONFIG="docs/sample_log_config.yaml"