chore: improve passing environment variables to the container

scripts/release_scripts/run_macaron.sh

@@ -351,9 +351,10 @@ if [[ -f "$HOME/.m2/settings.xml" ]]; then
 fi
 
 # Set up proxy.
-# We respect the host machine's proxy environment variables.
-# For Maven and Gradle projects that Macaron needs to analyzes, the proxy configuration
-# for Maven wrapper `mvnw` and Gradle wrapper `gradlew` are set using `MAVEN_OPTS` and
+# - We respect the host machine's proxy environment variables.
+# - For Maven, proxy configuration can be set through the `MAVEN_OPTS`
+# environment variable.
+# - For Gradle, proxy configuration can be set through the `JAVA_OPTS` or
 # `GRADLE_OPTS` environment variables.
 proxy_var_names=(
     "http_proxy"
@@ -365,11 +366,12 @@ proxy_var_names=(
     "FTP_PROXY"
     "NO_PROXY"
     "MAVEN_OPTS"
+    "JAVA_OPTS"
     "GRADLE_OPTS"
 )
 
 for v in "${proxy_var_names[@]}"; do
-    [[ -n ${!v:-} ]] && proxy_vars+=("-e" "${v}=${!v}")
+    proxy_vars+=("-e" "${v}")
 done
 
 prod_vars=(
@@ -434,9 +436,9 @@ ${DOCKER_EXEC} run \
     --rm -i "${tty[@]}" \
     -e "USER_UID=${USER_UID}" \
     -e "USER_GID=${USER_GID}" \
-    -e "GITHUB_TOKEN=${GITHUB_TOKEN:-}" \
-    -e "MCN_GITLAB_TOKEN=${MCN_GITLAB_TOKEN:-}" \
-    -e "MCN_SELF_HOSTED_GITLAB_TOKEN=${MCN_SELF_HOSTED_GITLAB_TOKEN:-}" \
+    -e "GITHUB_TOKEN" \
+    -e "MCN_GITLAB_TOKEN" \
+    -e "MCN_SELF_HOSTED_GITLAB_TOKEN" \
     "${proxy_vars[@]}" \
     "${prod_vars[@]}" \
     "${mounts[@]}" \