diff --git a/.github/workflows/build-and-publish.yaml b/.github/workflows/build-and-publish.yaml
new file mode 100644
index 0000000..50dd639
--- /dev/null
+++ b/.github/workflows/build-and-publish.yaml
@@ -0,0 +1,60 @@
+name: Build and Publish Docker Image
+
+on:
+  workflow_call:
+    inputs:
+      service_name: { required: true, type: string }
+      docker_tags: { required: true, type: string }
+      build_args: { required: false, type: string }
+      image_title: { required: true, type: string }
+      image_description: { required: true, type: string }
+
+jobs:
+  build-and-push:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+
+      - name: Validate context
+        run: |
+          [ -d "./${{ inputs.service_name }}" ] || { echo "Directory missing"; exit 1; }
+          [ -f "./${{ inputs.service_name }}/Dockerfile" ] || { echo "Dockerfile missing"; exit 1; }
+
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v3
+
+      - name: Build local image
+        uses: docker/build-push-action@v6
+        with:
+          context: ./${{ inputs.service_name }}
+          load: true # Loads image into local Docker daemon for scanning
+          tags: local_scan_target:latest
+          build-args: ${{ inputs.build_args }}
+
+#      - name: Scan image with Anchore
+#        uses: anchore/scan-action@v3
+#        with:
+#          image: "local_scan_target:latest"
+#          fail-build: true
+#          severity-cutoff: high # Fails on High or Critical
+#          auto-update: true
+#          # extra-args: "--skip-db-update-check"
+
+      - name: Log in to GHCR
+        if: github.event_name != 'pull_request'
+        uses: docker/login-action@v3
+        with:
+          registry: ghcr.io
+          username: ${{ github.repository_owner }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Build and push
+        uses: docker/build-push-action@v6
+        with:
+          context: ./${{ inputs.service_name }}
+          push: ${{ github.event_name != 'pull_request' }}
+          tags: ${{ inputs.docker_tags }}
+          build-args: ${{ inputs.build_args }}
+          cache-from: type=gha
+          cache-to: type=gha,mode=max
\ No newline at end of file
diff --git a/.github/workflows/hms.yaml b/.github/workflows/hms.yaml
new file mode 100644
index 0000000..8f16ec3
--- /dev/null
+++ b/.github/workflows/hms.yaml
@@ -0,0 +1,43 @@
+name: Build and Publish auto-fpt-hms Image
+
+on:
+  push:
+    branches: ["main"]
+    tags: ["v*"]
+    paths: ["hms/**", ".github/workflows/hms.yaml", ".github/workflows/build-and-publish.yaml"]
+  pull_request:
+    branches: ["main"]
+    paths: ["hms/**", ".github/workflows/hms.yaml", ".github/workflows/build-and-publish.yaml"]
+
+jobs:
+  prepare:
+    runs-on: ubuntu-latest
+    outputs:
+      owner_lc: ${{ steps.set_owner.outputs.owner_lc }}
+    steps:
+      - id: set_owner
+        run: echo "owner_lc=${OWNER,,}" >> $GITHUB_OUTPUT
+        env:
+          OWNER: ${{ github.repository_owner }}
+
+  build-and-push:
+    needs: prepare
+    strategy:
+      matrix:
+        hms_version:
+          - { version: '4.12', tag_suffix: '4.12', is_latest: false }
+          - { version: '4.13', tag_suffix: '4.13', is_latest: true }
+          - { version: '4.13-beta.6', tag_suffix: '4.13-beta.6', is_latest: false }
+          - { version: '4.14-beta.1', tag_suffix: '4.14-beta.1', is_latest: false }
+    uses: ./.github/workflows/build-and-publish.yaml
+    with:
+      service_name: hms
+      docker_tags: |
+        ghcr.io/${{ needs.prepare.outputs.owner_lc }}/auto-fpt-hms:${{ matrix.hms_version.tag_suffix }}
+        ${{ matrix.hms_version.is_latest && format('ghcr.io/{0}/auto-fpt-hms:latest', needs.prepare.outputs.owner_lc) || '' }}
+      build_args: HMS_VERSION=${{ matrix.hms_version.version }}
+      image_title: auto-fpt-hms
+      image_description: Docker container for running HEC-HMS hydrological simulations
+    permissions:
+      contents: read
+      packages: write
\ No newline at end of file
diff --git a/CODE_OF_CONDUCT.md b/CODE_OF_CONDUCT.md
new file mode 100644
index 0000000..79dcecd
--- /dev/null
+++ b/CODE_OF_CONDUCT.md
@@ -0,0 +1,36 @@
+# Code of Conduct
+
+## Our Pledge
+
+We as members, contributors, and leaders pledge to make participation in our community a
+harassment-free experience for everyone.
+
+## Our Standards
+
+Examples of behavior that contributes to a positive environment:
+
+- Using welcoming and inclusive language
+- Being respectful of differing viewpoints and experiences
+- Gracefully accepting constructive criticism
+- Focusing on what is best for the community
+- Showing empathy towards other community members
+
+Examples of unacceptable behavior:
+
+- The use of sexualized language or imagery
+- Trolling, insulting/derogatory comments, and personal or political attacks
+- Public or private harassment
+- Publishing others' private information without explicit permission
+- Other conduct which could reasonably be considered inappropriate in a professional
+    setting
+
+## Enforcement
+
+Instances of abusive, harassing, or otherwise unacceptable behavior may be reported to
+the project maintainers. All complaints will be reviewed and investigated promptly and
+fairly.
+
+## Attribution
+
+This Code of Conduct is adapted from the
+[Contributor Covenant](https://www.contributor-covenant.org), version 2.1.
diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
new file mode 100644
index 0000000..9d2ae1b
--- /dev/null
+++ b/CONTRIBUTING.md
@@ -0,0 +1,61 @@
+# Contributing
+
+Thank you for your interest in contributing!
+
+## Commit Messages
+
+This project uses [Conventional Commits](https://www.conventionalcommits.org/en/v1.0.0/).
+All commit messages **must** follow this format:
+
+```
+<type>[optional scope]: <description>
+
+[optional body]
+
+[optional footer(s)]
+```
+
+### Types
+
+| Type | When to use | Changelog section |
+|---|---|---|
+| `feat` | A new feature | Added |
+| `fix` | A bug fix | Fixed |
+| `perf` | A performance improvement | Changed |
+| `refactor` | Code restructuring, no behavior change | Changed |
+| `revert` | Reverting a previous commit | Fixed |
+| `docs` | Documentation only | _(skipped)_ |
+| `test` | Adding or updating tests | _(skipped)_ |
+| `chore` | Maintenance, dependencies, tooling | _(skipped)_ |
+| `ci` | CI/CD changes | _(skipped)_ |
+
+### Breaking Changes
+
+Append `!` after the type, or add `BREAKING CHANGE:` in the footer:
+
+```
+feat!: drop support for Python 3.11
+```
+
+```
+feat: new API
+
+BREAKING CHANGE: `old_function` has been removed.
+```
+
+### Examples
+
+```
+feat(io): add support for GeoParquet output
+fix: handle missing CRS in raster inputs
+chore: bump ruff to v0.15.5
+docs: add example notebook for elevation grid
+```
+
+## Submitting Changes
+
+1. Fork the repository.
+1. Create a feature branch.
+1. Make your changes with tests.
+1. Ensure all checks pass.
+1. Submit a pull request.
diff --git a/LICENSE b/LICENSE
new file mode 100644
index 0000000..5808e69
--- /dev/null
+++ b/LICENSE
@@ -0,0 +1,21 @@
+MIT License
+
+Copyright (c) 2026 Dewberry
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
diff --git a/README.md b/README.md
index 6be4411..0c62cb5 100644
--- a/README.md
+++ b/README.md
@@ -1,2 +1,6 @@
 # auto-fpt
 Automated Flood Prediction Tools
+
+## Directories
+
+- **hms/** - HEC-HMS runner application. Contains Gradle build configuration and Dockerfile for containerized HEC-HMS (Hydrologic Engineering Center's Hydrologic Modeling System) execution.
diff --git a/hms/.dockerignore b/hms/.dockerignore
new file mode 100644
index 0000000..c262d5a
--- /dev/null
+++ b/hms/.dockerignore
@@ -0,0 +1,15 @@
+.git
+.gitignore
+.gitattributes
+.vscode
+.idea
+*.md
+.DS_Store
+.gradle
+build/
+*.iml
+.classpath
+.project
+.settings/
+.miniodata/
+*.log
diff --git a/hms/.gitignore b/hms/.gitignore
new file mode 100644
index 0000000..da4f499
--- /dev/null
+++ b/hms/.gitignore
@@ -0,0 +1,47 @@
+# Compiled class file
+*.class
+
+# Log file
+*.log
+
+# BlueJ files
+*.ctxt
+
+# Mobile Tools for Java (J2ME)
+.mtj.tmp/
+
+# Package Files #
+*.jar
+*.war
+*.nar
+*.ear
+*.zip
+*.tar.gz
+*.rar
+
+# virtual machine crash logs, see http://www.java.com/en/download/help/error_hotspot.xml
+hs_err_pid*
+replay_pid*
+
+# Gradle
+.gradle/
+build/
+
+# IDE
+.idea/
+.vscode/
+*.iml
+.classpath
+.project
+.settings/
+
+# OS
+.DS_Store
+Thumbs.db
+
+# Environment & Local
+.env
+.env.local
+.miniodata/
+main
+model/
\ No newline at end of file
diff --git a/hms/Dockerfile b/hms/Dockerfile
new file mode 100644
index 0000000..86d74f4
--- /dev/null
+++ b/hms/Dockerfile
@@ -0,0 +1,194 @@
+# Build arguments
+ARG HMS_VERSION=4.12
+
+# First stage: Build the jar for calling hms compute
+FROM eclipse-temurin:17-jdk-jammy AS javabuilder
+
+ARG HMS_VERSION
+
+RUN apt update && apt -y install wget unzip
+RUN mkdir /app
+WORKDIR /app
+
+# Java and Gradle setup
+RUN wget https://services.gradle.org/distributions/gradle-7.3.1-bin.zip && \
+    mkdir /opt/gradle && \
+    unzip -d /opt/gradle gradle-7.3.1-bin.zip && \
+    rm gradle-7.3.1-bin.zip
+ENV PATH=$PATH:/opt/gradle/gradle-7.3.1/bin
+
+# Install dependencies for HMS and build
+RUN apt -y install libxrender1 libxtst6 libxi6 libfreetype6 libgfortran5 libfontconfig1
+
+# Download and extract HMS once (large layer, cached separately)
+# Use tar --exclude to skip unnecessary files during extraction
+# Note: HMS 4.13 has a malformed filename with duplicate -linux64 suffix
+RUN set -e && \
+    mkdir -p /tmp/hms-extract && \
+    FILE1="hec-hms-${HMS_VERSION}-linux64.tar.gz" && \
+    FILE2="hec-hms-${HMS_VERSION}-linux64-linux64.tar.gz" && \
+    URL1="https://www.hec.usace.army.mil/nexus/repository/maven-public/mil/army/usace/hec/hec-hms/${HMS_VERSION}-linux64/${FILE1}" && \
+    URL2="https://www.hec.usace.army.mil/nexus/repository/maven-public/mil/army/usace/hec/hec-hms/${HMS_VERSION}-linux64/${FILE2}" && \
+    (wget "${URL1}" -P /tmp 2>/dev/null) || wget "${URL2}" -P /tmp && \
+    if [ -f /tmp/${FILE1} ]; then TARFILE=${FILE1}; else TARFILE=${FILE2}; fi && \
+    tar -xzf /tmp/${TARFILE} -C /tmp/hms-extract \
+      --exclude='*.zip' \
+      --exclude='*.exe' \
+      --exclude='*.bat' \
+      --exclude='*.cmd' \
+      --exclude='*/samples' \
+      --exclude='*/docs' \
+      --exclude='*/examples' \
+      --exclude='*/vortex' && \
+    mkdir -p /hec-hms && \
+    echo "Contents of /tmp/hms-extract:" && ls -la /tmp/hms-extract && \
+    # Find the main HMS directory (could be HEC-HMS-* or hec-hms-*)
+    HMS_DIR=$(find /tmp/hms-extract -maxdepth 1 -type d -name "*HEC-HMS*" -o -name "*hec-hms*" | head -1) && \
+    if [ -z "$HMS_DIR" ]; then \
+      echo "ERROR: Could not find HMS directory in extracted files"; \
+      ls -la /tmp/hms-extract; \
+      exit 1; \
+    fi && \
+    echo "Found HMS directory: $HMS_DIR" && \
+    mv "$HMS_DIR" /hec-hms/HEC-HMS-${HMS_VERSION} && \
+    rm -rf /tmp/hms-extract /tmp/${TARFILE}
+
+# Copy and build source (separate layer allows better caching of HMS deps)
+COPY ./build.gradle ./gradlew /app/
+RUN gradle --version
+
+RUN mkdir -p /app/src/main/java/dewberry
+COPY ./RunHMS.java /app/src/main/java/dewberry/RunHMS.java
+RUN gradle build --no-daemon -PhmsVersion=${HMS_VERSION} && chmod +x /app/build/libs/hms-compute.jar
+
+
+# Final stage: create the production container
+FROM debian:bookworm-slim AS prod
+
+ARG HMS_VERSION=4.12
+ENV HMS_VERSION=${HMS_VERSION}
+
+LABEL org.opencontainers.image.title="HEC-HMS Container" \
+      org.opencontainers.image.description="Docker container for running HEC-HMS hydrological simulations" \
+      org.opencontainers.image.source="https://github.com/Dewberry/autp-fpt" \
+      org.opencontainers.image.version="${HMS_VERSION}"
+
+RUN apt-get update && apt-get install -y --no-install-recommends \
+    libxrender1 libxtst6 libxi6 libfreetype6 libgfortran5 libfontconfig1 \
+    && rm -rf /var/lib/apt/lists/*
+
+# Create non-root user
+RUN useradd -m -u 1000 hms
+
+COPY --from=javabuilder /hec-hms /hec-hms
+RUN rm -f /hec-hms/lib && mkdir -p /hec-hms/lib
+COPY --from=javabuilder /app/build/libs/hms-compute.jar /hec-hms/lib/hms-compute.jar
+
+# Verify HMS directory structure
+RUN echo "=== HMS Directory Structure ===" && \
+    ls -la /hec-hms/ && \
+    echo "=== HEC-HMS subdirectories ===" && \
+    find /hec-hms -maxdepth 2 -type d | head -20 && \
+    echo "=== Checking for hms.jar ===" && \
+    find /hec-hms -name "hms.jar" && \
+    echo "=== Checking for lib directory ===" && \
+    ls -la /hec-hms/HEC-HMS-* 2>/dev/null | head -20 || echo "HEC-HMS directory not found with expected naming" && \
+    echo "=== Searching for GDAL native libraries ===" && \
+    find /hec-hms -name "*gdal*jni*" -o -name "libgdal*" | head -20 && \
+    echo "=== Checking bin directories ===" && \
+    find /hec-hms -type d -name "bin" -exec ls -la {} \;
+
+# Create logging configuration files to suppress verbose output
+RUN mkdir -p /etc/hms-logging && \
+    cat > /etc/hms-logging/logging.properties <<'EOF'
+handlers= java.util.logging.ConsoleHandler
+.level= INFO
+java.util.logging.ConsoleHandler.level = INFO
+java.util.logging.ConsoleHandler.formatter = java.util.logging.SimpleFormatter
+java.util.logging.SimpleFormatter.format=%1$tY-%1$tm-%1$td %1$tH:%1$tM:%1$tS %4$s: %5$s%n
+EOF
+
+RUN cat > /etc/hms-logging/logback.xml <<'EOF'
+<configuration>
+  <root level="ERROR"/>
+</configuration>
+EOF
+
+RUN cat > /etc/hms-logging/log4j2.xml <<'EOF'
+<Configuration status="WARN">
+  <Loggers>
+    <Root level="error"/>
+  </Loggers>
+</Configuration>
+EOF
+
+ENV HMS_HOME=/hec-hms/HEC-HMS-${HMS_VERSION}
+ENV JAVA_EXE=$HMS_HOME/jre/bin/java
+ENV JAVA_HOME=$HMS_HOME/jre
+ENV PROG=hms.hms
+ENV PATH=$HMS_HOME/bin/taudem:$HMS_HOME/bin/mpi:$HMS_HOME/bin:$HMS_HOME/jre/bin/:$HMS_HOME/bin/:$HMS_HOME/jre/lib/:$PATH
+ENV GDAL_DATA=$HMS_HOME/bin/gdal/gdal-data
+ENV PROJ_LIB=$HMS_HOME/bin/gdal/proj
+ENV CLASSPATH=$HMS_HOME/*:$HMS_HOME/lib/*:$HMS_HOME/lib/hec/*:$HMS_HOME/jre/lib/*
+ENV HDF5_DISABLE_ERROR_STACK=1
+
+RUN chmod +x $HMS_HOME/jre/bin/java && chown -R hms:hms /hec-hms
+
+# Create a shell wrapper for proper variable expansion at build time (before USER hms)
+RUN cat > /usr/local/bin/run-hms.sh <<'SCRIPT'
+#!/bin/bash
+set -e
+HMS_VERSION=${HMS_VERSION:-4.12}
+HMS_HOME=/hec-hms/HEC-HMS-${HMS_VERSION}
+JAVA_EXE=${HMS_HOME}/jre/bin/java
+
+if [ ! -f "$JAVA_EXE" ]; then
+  echo "ERROR: Java executable not found at $JAVA_EXE"
+  ls -la ${HMS_HOME}/jre/bin/ 2>/dev/null || echo "JRE bin directory not found"
+  exit 1
+fi
+
+# Build library path by finding all potential library locations
+LIBRARY_PATH="${HMS_HOME}/bin:${HMS_HOME}/lib:${HMS_HOME}/jre/lib/server"
+
+# Add any gdal-related directories
+if [ -d "${HMS_HOME}/bin/gdal" ]; then
+  LIBRARY_PATH="${LIBRARY_PATH}:${HMS_HOME}/bin/gdal"
+fi
+
+# Search for native libraries recursively
+for libdir in $(find ${HMS_HOME} -type d -name "lib*" 2>/dev/null); do
+  LIBRARY_PATH="${LIBRARY_PATH}:${libdir}"
+done
+
+# Add /hec-hms bin directories
+LIBRARY_PATH="${LIBRARY_PATH}:/hec-hms/bin"
+if [ -d "/hec-hms/bin/gdal" ]; then
+  LIBRARY_PATH="${LIBRARY_PATH}:/hec-hms/bin/gdal"
+fi
+
+exec $JAVA_EXE \
+  -XX:+ExitOnOutOfMemoryError \
+  -XX:MaxRAMPercentage=75 \
+  -XX:+UseContainerSupport \
+  -Djava.library.path=${LIBRARY_PATH} \
+  -Djava.util.logging.config.file=/etc/hms-logging/logging.properties \
+  -Dorg.slf4j.simpleLogger.defaultLogLevel=error \
+  -Dorg.slf4j.simpleLogger.showDateTime=false \
+  -Dorg.slf4j.simpleLogger.showThreadName=false \
+  -Dlogback.configurationFile=/etc/hms-logging/logback.xml \
+  -Dlog4j.configurationFile=/etc/hms-logging/log4j2.xml \
+  -Dlog4j2.configurationFile=/etc/hms-logging/log4j2.xml \
+  -Dlog4j2.statusLoggerLevel=OFF \
+  -Djava.awt.headless=true \
+  -cp "/hec-hms/lib/*:${HMS_HOME}/*:${HMS_HOME}/lib/*:${HMS_HOME}/lib/hec/*" \
+  dewberry.RunHMS "$@"
+SCRIPT
+
+RUN chmod +x /usr/local/bin/run-hms.sh
+
+WORKDIR /app
+RUN chown hms:hms /app
+USER hms
+
+ENTRYPOINT ["/usr/local/bin/run-hms.sh"]
\ No newline at end of file
diff --git a/hms/README.md b/hms/README.md
new file mode 100644
index 0000000..d999450
--- /dev/null
+++ b/hms/README.md
@@ -0,0 +1,60 @@
+# auto-fpt-hms
+
+Docker container for running HEC-HMS hydrological simulations.
+
+## Image Size
+
+~1.88GB - Primarily HMS binaries, libraries, and bundled Java runtime. Image size cannot be significantly reduced without removing essential HMS components.
+
+## Supported Versions
+
+**Stable Release (Tested & Working):**
+- HMS 4.13 (default)
+
+**Previous Stable Release:**
+- HMS 4.12
+
+**Beta Versions (Tested & Working):**
+- HMS 4.13-beta.6
+- HMS 4.14-beta.1
+
+**Legacy (Not Tested):**
+- HMS 4.11, 4.9, 4.10 (available but not actively supported)
+
+## Usage
+
+Run an HMS simulation by passing the HMS project file path and simulation name as arguments:
+
+```bash
+docker run -v /path/to/models:/mnt/model hms-docker /mnt/model/project.hms simulation_name
+```
+
+### Arguments
+
+- `filepath`: Path to the HMS project file (`.hms`)
+- `simname`: Name of the simulation to run within the project
+
+### Volume Mounts
+
+Mount your HMS model files at `/mnt/model` in the container. The container expects to find `.hms` project files at this location.
+
+## Building
+
+Build the Docker image with a specific HMS version:
+
+```bash
+# Build with default version (4.13)
+docker build -t hms-docker .
+
+# Build with specific versions
+docker build --build-arg HMS_VERSION=4.12 -t hms-docker:4.12 .
+docker build --build-arg HMS_VERSION=4.13 -t hms-docker:4.13 .
+docker build --build-arg HMS_VERSION=4.13-beta.6 -t hms-docker:4.13-beta .
+docker build --build-arg HMS_VERSION=4.14-beta.1 -t hms-docker:4.14-beta .
+```
+
+The build process:
+1. Compiles the Java HMS runner application using reflection-based API detection
+2. Downloads HEC-HMS binaries and dependencies for the specified version (excludes samples/docs)
+3. Creates a minimal production image with all required libraries and non-root user execution
+4. Single `RunHMS` class supports all versions through runtime API detection
\ No newline at end of file
diff --git a/hms/RunHMS.java b/hms/RunHMS.java
new file mode 100644
index 0000000..2999df3
--- /dev/null
+++ b/hms/RunHMS.java
@@ -0,0 +1,488 @@
+package dewberry;
+
+import java.io.ByteArrayOutputStream;
+import java.io.PrintStream;
+import java.lang.reflect.InvocationTargetException;
+import java.lang.reflect.Method;
+import java.util.logging.Logger;
+import java.util.logging.ConsoleHandler;
+import java.util.logging.SimpleFormatter;
+
+public class RunHMS {
+    private static final Logger logger = Logger.getLogger(RunHMS.class.getName());
+
+    static {
+        // Configure logger with timestamp format
+        logger.setUseParentHandlers(false);
+        ConsoleHandler handler = new ConsoleHandler();
+        handler.setFormatter(new SimpleFormatter());
+        logger.addHandler(handler);
+        logger.setLevel(java.util.logging.Level.INFO);
+    }
+
+    public static void main(String[] args) {
+        if (args.length < 2) {
+            logger.severe("Error: You must provide both `hmsFilePath` and `simulationName` as command-line arguments.");
+            System.exit(1);
+        }
+
+        String hmsFilePath = args[0];
+        String simulationName = args[1];
+
+        logger.info("Starting HMS simulation: model='" + hmsFilePath + "', simulation='" + simulationName + "'");
+
+        try {
+            // Try multiple API versions in order of preference
+
+            // Try 4.14+ API first (static factory method)
+            int result = tryStaticOpen(hmsFilePath, simulationName);
+            if (result == 0) {
+                // Success
+                System.exit(0);
+            } else if (result == 1) {
+                // Errors detected in simulation
+                System.exit(1);
+            }
+            // result == 2 means API not available, try next
+
+            // Fall back to 4.12-4.13 API (constructor pattern)
+            result = tryConstructorOpen(hmsFilePath, simulationName);
+            if (result == 0) {
+                // Success
+                System.exit(0);
+            } else if (result == 1) {
+                // Errors detected in simulation
+                System.exit(1);
+            }
+            // result == 2 means API not available
+
+            // If we get here, no compatible API was found
+            throw new Exception("No compatible HMS API found in classpath");
+
+        } catch (Exception e) {
+            logger.severe("Error running HMS: " + e.getMessage());
+            System.exit(1);
+        }
+    }
+
+    /**
+     * Print available runs in the project for debugging
+     */
+    private static void printAvailableRuns(Class<?> projectClass, Object project) {
+        try {
+            // Try various method names to get list of runs
+            String[] methodNames = {"getRunNames", "getRuns", "getSimulations", "getComputeRuns",
+                                   "getComputeRunManager", "getRunManager", "getSimulationManager"};
+
+            // First, try to get runs directly
+            for (String methodName : methodNames) {
+                try {
+                    Method method = projectClass.getMethod(methodName);
+                    Object result = method.invoke(project);
+
+                    if (result != null) {
+                        System.err.println("Available runs in project:");
+                        if (result instanceof java.util.Collection) {
+                            java.util.Collection<?> collection = (java.util.Collection<?>) result;
+                            if (collection.isEmpty()) {
+                                System.err.println("  (none - project has no runs)");
+                            } else {
+                                for (Object run : collection) {
+                                    System.err.println("  - " + run);
+                                }
+                            }
+                            return;
+                        } else if (result.getClass().isArray()) {
+                            Object[] array = (Object[]) result;
+                            if (array.length == 0) {
+                                System.err.println("  (none - project has no runs)");
+                            } else {
+                                for (Object run : array) {
+                                    System.err.println("  - " + run);
+                                }
+                            }
+                            return;
+                        } else {
+                            // Try to get runs from the manager object
+                            System.err.println("Attempting to get runs from manager...");
+                            printAvailableRunsFromManager(result.getClass(), result);
+                            return;
+                        }
+                    }
+                } catch (NoSuchMethodException e) {
+                    // Try next method
+                    continue;
+                }
+            }
+
+            System.err.println("Could not retrieve available runs - method not found");
+            System.err.println("  Available methods on Project:");
+            // List all available methods to help with debugging
+            for (Method m : projectClass.getMethods()) {
+                if (m.getName().toLowerCase().contains("run") ||
+                    m.getName().toLowerCase().contains("simul") ||
+                    m.getName().toLowerCase().contains("compute")) {
+                    System.err.println("    - " + m.getName());
+                }
+            }
+        } catch (Exception e) {
+            System.err.println("Error while trying to list available runs: " + e.getMessage());
+        }
+    }
+
+    /**
+     * Try to get runs from a manager object
+     */
+    private static void printAvailableRunsFromManager(Class<?> managerClass, Object manager) {
+        try {
+            System.err.println("Manager class: " + managerClass.getName());
+            String[] methodNames = {"getRunNames", "getNames", "getAll", "getAllRuns", "listAll", "values",
+                                   "getRuns", "getSimulations", "getComputeRuns", "elements", "toArray"};
+
+            boolean foundMethod = false;
+            for (String methodName : methodNames) {
+                try {
+                    Method method = managerClass.getMethod(methodName);
+                    foundMethod = true;
+                    Object result = method.invoke(manager);
+
+                    if (result != null) {
+                        System.err.println("Available runs in project (via " + methodName + "):");
+                        if (result instanceof java.util.Collection) {
+                            java.util.Collection<?> collection = (java.util.Collection<?>) result;
+                            if (collection.isEmpty()) {
+                                System.err.println("  (none)");
+                            } else {
+                                for (Object run : collection) {
+                                    System.err.println("  - " + run);
+                                }
+                            }
+                            return;
+                        } else if (result.getClass().isArray()) {
+                            Object[] array = (Object[]) result;
+                            if (array.length == 0) {
+                                System.err.println("  (none)");
+                            } else {
+                                for (Object run : array) {
+                                    System.err.println("  - " + run);
+                                }
+                            }
+                            return;
+                        }
+                    }
+                } catch (NoSuchMethodException e) {
+                    // Method doesn't exist, try next
+                    continue;
+                } catch (Exception e) {
+                    System.err.println("Error calling " + methodName + ": " + e.getMessage());
+                }
+            }
+
+            // Fallback: list all available methods on the manager
+            if (!foundMethod) {
+                System.err.println("None of the standard run-listing methods were found.");
+            }
+            System.err.println("Available methods on manager (" + managerClass.getName() + "):");
+            Method[] allMethods = managerClass.getMethods();
+            int count = 0;
+            for (Method m : allMethods) {
+                String methodName = m.getName();
+                if (!methodName.startsWith("wait") && !methodName.equals("getClass") && !methodName.equals("hashCode") &&
+                    !methodName.equals("equals") && !methodName.equals("toString") && !methodName.equals("notify") &&
+                    !methodName.equals("notifyAll")) {
+                    System.err.println("  - " + methodName);
+                    count++;
+                }
+            }
+            if (count == 0) {
+                System.err.println("  (no public methods found)");
+            }
+        } catch (Exception e) {
+            System.err.println("Exception in printAvailableRunsFromManager: " + e.getMessage());
+        }
+    }
+
+    /**
+     * Additional error checking via reflection (fallback if stderr capture misses errors)
+     */
+    private static boolean hasProjectErrors(Class<?> projectClass, Object project) {
+        try {
+            // Try common error checking methods on the project
+            String[] errorMethodNames = {"getErrorCount", "hasErrors", "getErrors", "getMessageCount", "getMessages"};
+
+            for (String methodName : errorMethodNames) {
+                try {
+                    Method method = projectClass.getMethod(methodName);
+                    Object result = method.invoke(project);
+
+                    if (result instanceof Integer) {
+                        int count = (Integer) result;
+                        if (count > 0) {
+                            System.err.println("Project has " + count + " errors");
+                            return true;
+                        }
+                    } else if (result instanceof Boolean) {
+                        boolean hasErrors = (Boolean) result;
+                        if (hasErrors) {
+                            System.err.println("Project reports errors");
+                            return true;
+                        }
+                    }
+                } catch (NoSuchMethodException e) {
+                    // Method doesn't exist, try next one
+                    continue;
+                }
+            }
+
+            return false;
+        } catch (Exception e) {
+            // If we can't check for errors via API, stderr capture should have caught them
+            return false;
+        }
+    }
+
+    /**
+     * Try HMS 4.14+ API using static Project.open(String) method
+     * Returns: 0=success, 1=errors detected, 2=API not available
+     */
+    private static int tryStaticOpen(String hmsFilePath, String simulationName) {
+        Class<?> projectClass = null;
+        Object project = null;
+
+        try {
+            projectClass = Class.forName("hms.model.Project");
+            Method openMethod = projectClass.getMethod("open", String.class);
+            Method computeRunMethod = projectClass.getMethod("computeRun", String.class);
+            Method closeMethod = projectClass.getMethod("close");
+
+
+            project = openMethod.invoke(null, hmsFilePath);
+
+            // Capture both stdout and stderr to check for HMS errors
+            PrintStream originalOut = System.out;
+            PrintStream originalErr = System.err;
+            ByteArrayOutputStream capturedOut = new ByteArrayOutputStream();
+            ByteArrayOutputStream capturedErr = new ByteArrayOutputStream();
+            PrintStream outStream = new PrintStream(capturedOut);
+            PrintStream errStream = new PrintStream(capturedErr);
+            System.setOut(outStream);
+            System.setErr(errStream);
+
+            boolean hasErrors = false;
+            Object result = null;
+
+            try {
+                result = computeRunMethod.invoke(project, simulationName);
+            } finally {
+                // Always restore stdout and stderr
+                System.setOut(originalOut);
+                System.setErr(originalErr);
+                outStream.flush();
+                errStream.flush();
+                String stdoutOutput = capturedOut.toString();
+                String stderrOutput = capturedErr.toString();
+
+                // Print all captured output
+                if (!stdoutOutput.isEmpty()) {
+                    System.out.print(stdoutOutput);
+                }
+                if (!stderrOutput.isEmpty()) {
+                    System.err.print(stderrOutput);
+                }
+
+                // Check for HMS error patterns in either output
+                String allOutput = stdoutOutput + stderrOutput;
+                if (allOutput.contains("ERROR") && (allOutput.contains("ERROR 2") || allOutput.contains("Could not find") || allOutput.contains("does not exist"))) {
+                    hasErrors = true;
+                }
+            }
+
+            // If HMS errors were detected, fail
+            if (hasErrors) {
+                logger.warning("HMS simulation failed - errors detected in output");
+                closeMethod.invoke(project);
+                return 1;
+            }
+
+            // Check if computeRun returned a status code (usually 0 for success)
+            if (result instanceof Integer) {
+                int status = (Integer) result;
+                if (status != 0) {
+                    logger.warning("HMS simulation failed with status code: " + status);
+                    closeMethod.invoke(project);
+                    return 1;
+                }
+            }
+
+            // Check for errors in the project after simulation
+            if (hasProjectErrors(projectClass, project)) {
+                logger.warning("HMS simulation completed but with errors");
+                closeMethod.invoke(project);
+                return 1;
+            }
+
+            closeMethod.invoke(project);
+
+            logger.info("Completed HMS simulation: model='" + hmsFilePath + "', simulation='" + simulationName + "'");
+            return 0;
+
+        } catch (NoSuchMethodException e) {
+            logger.severe("4.14+ API not available: method not found - " + e.getMessage());
+            return 2;
+        } catch (ClassNotFoundException e) {
+            logger.severe("4.14+ API not available: class not found - " + e.getMessage());
+            return 2;
+        } catch (InvocationTargetException e) {
+            Throwable cause = e.getCause();
+            String errorMsg = cause != null ? cause.getMessage() : e.getMessage();
+            logger.severe("4.14+ API method invocation failed: " + errorMsg);
+            if (cause != null) {
+            } else {
+            }
+            // "Invalid run" and similar errors are simulation failures, not API incompatibility
+            if (errorMsg != null && (errorMsg.contains("Invalid run") || errorMsg.contains("not found") ||
+                                     errorMsg.contains("does not exist") || errorMsg.contains("Could not") ||
+                                     errorMsg.contains("error") || errorMsg.toLowerCase().contains("failed"))) {
+                // Provide debugging info for invalid run
+                if (errorMsg.contains("Invalid run")) {
+                    logger.severe("ERROR: Invalid run name: '" + simulationName + "'");
+                    logger.info("Hint: The run name '" + simulationName + "' was not found in the HMS project.");
+                    logger.info("Verify that:");
+                    logger.info("  1. The run exists in the .hms file");
+                    logger.info("  2. The spelling/capitalization matches exactly");
+                    logger.info("  3. The file path '" + hmsFilePath + "' is correct");
+                } else if (errorMsg.contains("does not exist")) {
+                    logger.severe("ERROR: HMS model file not found: '" + hmsFilePath + "'");
+                    logger.info("Hint: The HMS project file could not be opened.");
+                    logger.info("Verify that:");
+                    logger.info("  1. The file path is correct: '" + hmsFilePath + "'");
+                    logger.info("  2. The file exists and is readable");
+                    logger.info("  3. If using Docker, the volume mount is correct: -v LOCAL_PATH:CONTAINER_PATH");
+                    logger.info("  4. Ensure LOCAL_MODEL_DIR exists and contains the .hms file");
+                }
+                return 1;
+            }
+            return 2;
+        } catch (Exception e) {
+            logger.severe("4.14+ API failed: " + e.getMessage());
+            return 2;
+        }
+    }
+
+    /**
+     * Try HMS 4.12-4.13 API using Project constructor
+     * Returns: 0=success, 1=errors detected, 2=API not available
+     */
+    private static int tryConstructorOpen(String hmsFilePath, String simulationName) {
+        Class<?> projectClass = null;
+        Object project = null;
+
+        try {
+            projectClass = Class.forName("hms.model.Project");
+            Method computeRunMethod = projectClass.getMethod("computeRun", String.class);
+            Method closeMethod = projectClass.getMethod("close");
+
+
+            project = projectClass.getConstructor(String.class).newInstance(hmsFilePath);
+
+            // Capture both stdout and stderr to check for HMS errors
+            PrintStream originalOut = System.out;
+            PrintStream originalErr = System.err;
+            ByteArrayOutputStream capturedOut = new ByteArrayOutputStream();
+            ByteArrayOutputStream capturedErr = new ByteArrayOutputStream();
+            PrintStream outStream = new PrintStream(capturedOut);
+            PrintStream errStream = new PrintStream(capturedErr);
+            System.setOut(outStream);
+            System.setErr(errStream);
+
+            boolean hasErrors = false;
+            Object result = null;
+
+            try {
+                result = computeRunMethod.invoke(project, simulationName);
+            } finally {
+                // Always restore stdout and stderr
+                System.setOut(originalOut);
+                System.setErr(originalErr);
+                outStream.flush();
+                errStream.flush();
+                String stdoutOutput = capturedOut.toString();
+                String stderrOutput = capturedErr.toString();
+
+                // Print all captured output
+                if (!stdoutOutput.isEmpty()) {
+                    System.out.print(stdoutOutput);
+                }
+                if (!stderrOutput.isEmpty()) {
+                    System.err.print(stderrOutput);
+                }
+
+                // Check for HMS error patterns in either output
+                String allOutput = stdoutOutput + stderrOutput;
+                if (allOutput.contains("ERROR") && (allOutput.contains("ERROR 2") || allOutput.contains("Could not find") || allOutput.contains("does not exist"))) {
+                    hasErrors = true;
+                }
+            }
+
+            // If HMS errors were detected, fail
+            if (hasErrors) {
+                logger.warning("HMS simulation failed - errors detected in output");
+                closeMethod.invoke(project);
+                return 1;
+            }
+
+            // Check for errors in the project after simulation
+            if (hasProjectErrors(projectClass, project)) {
+                logger.warning("HMS simulation completed but with errors");
+                closeMethod.invoke(project);
+                return 1;
+            }
+
+            closeMethod.invoke(project);
+
+            logger.info("Completed HMS simulation: model='" + hmsFilePath + "', simulation='" + simulationName + "'");
+            return 0;
+
+        } catch (NoSuchMethodException e) {
+            logger.severe("4.12-4.13 API not available: method not found - " + e.getMessage());
+            return 2;
+        } catch (ClassNotFoundException e) {
+            logger.severe("4.12-4.13 API not available: class not found - " + e.getMessage());
+            return 2;
+        } catch (InvocationTargetException e) {
+            Throwable cause = e.getCause();
+            String errorMsg = cause != null ? cause.getMessage() : e.getMessage();
+            logger.severe("4.12-4.13 API method invocation failed: " + errorMsg);
+            if (cause != null) {
+            } else {
+            }
+            // "Invalid run" and similar errors are simulation failures, not API incompatibility
+            if (errorMsg != null && (errorMsg.contains("Invalid run") || errorMsg.contains("not found") ||
+                                     errorMsg.contains("does not exist") || errorMsg.contains("Could not") ||
+                                     errorMsg.contains("error") || errorMsg.toLowerCase().contains("failed"))) {
+                // Provide debugging info for invalid run
+                if (errorMsg.contains("Invalid run")) {
+                    logger.severe("ERROR: Invalid run name: '" + simulationName + "'");
+                    logger.info("Hint: The run name '" + simulationName + "' was not found in the HMS project.");
+                    logger.info("Verify that:");
+                    logger.info("  1. The run exists in the .hms file");
+                    logger.info("  2. The spelling/capitalization matches exactly");
+                    logger.info("  3. The file path '" + hmsFilePath + "' is correct");
+                } else if (errorMsg.contains("does not exist")) {
+                    logger.severe("ERROR: HMS model file not found: '" + hmsFilePath + "'");
+                    logger.info("Hint: The HMS project file could not be opened.");
+                    logger.info("Verify that:");
+                    logger.info("  1. The file path is correct: '" + hmsFilePath + "'");
+                    logger.info("  2. The file exists and is readable");
+                    logger.info("  3. If using Docker, the volume mount is correct: -v LOCAL_PATH:CONTAINER_PATH");
+                    logger.info("  4. Ensure LOCAL_MODEL_DIR exists and contains the .hms file");
+                }
+                return 1;
+            }
+            return 2;
+        } catch (Exception e) {
+            logger.severe("4.12-4.13 API failed: " + e.getMessage());
+            return 2;
+        }
+    }
+}
diff --git a/hms/build.gradle b/hms/build.gradle
new file mode 100644
index 0000000..0087ada
--- /dev/null
+++ b/hms/build.gradle
@@ -0,0 +1,36 @@
+plugins {
+    id 'java-library'
+}
+
+repositories {
+    mavenCentral()
+}
+
+sourceCompatibility = JavaVersion.VERSION_1_8
+targetCompatibility = JavaVersion.VERSION_1_8
+
+// Allow HMS version to be passed as gradle property (-PhmsVersion=4.12)
+// Default to 4.12 for local builds
+ext.hmsVersion = project.hasProperty('hmsVersion') ? project.hmsVersion : '4.12'
+
+configurations {
+    linux_x64
+}
+
+dependencies {
+    // HMS libraries are provided at runtime by the Docker container
+    compileOnly files("/hec-hms/HEC-HMS-${hmsVersion}/hms.jar")
+    compileOnly fileTree(dir: "/hec-hms/HEC-HMS-${hmsVersion}/lib", include: '*.jar')
+}
+
+jar {
+    zip64 = true
+    manifest {
+        attributes 'Main-Class': 'dewberry.RunHMS'
+    }
+    archiveFileName = 'hms-compute.jar'
+}
+
+group 'dewberry'
+version '0.1.0'
+
diff --git a/hms/example-usage.sh b/hms/example-usage.sh
new file mode 100755
index 0000000..d7ab9f2
--- /dev/null
+++ b/hms/example-usage.sh
@@ -0,0 +1,23 @@
+#!/bin/bash
+
+# HMS_VERSION=${1:-4.12}
+HMS_VERSION=${1:-4.13}
+# HMS_VERSION=${1:-4.13-beta.6}
+# HMS_VERSION=${1:-4.14-beta.1}
+
+IMAGE=auto-fpt-hms:$HMS_VERSION
+
+docker build -t $IMAGE --build-arg HMS_VERSION=$HMS_VERSION .
+# docker pull ghcr.io/dewberry/auto-fpt-hms:$HMS_VERSION || true
+
+LOCAL_MODEL_DIR=/home/username/samples/castro
+HMS_MODEL_NAME=castro.hms
+SIMULATION='Current'
+
+CONTAINER_MODEL_DIR=/mnt/model
+s
+docker run \
+    -v $LOCAL_MODEL_DIR:$CONTAINER_MODEL_DIR \
+    $IMAGE \
+    $CONTAINER_MODEL_DIR/$HMS_MODEL_NAME \
+    $SIMULATION
diff --git a/hms/gradlew b/hms/gradlew
new file mode 100755
index 0000000..cbede15
--- /dev/null
+++ b/hms/gradlew
@@ -0,0 +1,234 @@
+#!/bin/sh
+
+#
+# Copyright � 2015-2021 the original authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      https://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
+##############################################################################
+#
+#   Gradle start up script for POSIX generated by Gradle.
+#
+#   Important for running:
+#
+#   (1) You need a POSIX-compliant shell to run this script. If your /bin/sh is
+#       noncompliant, but you have some other compliant shell such as ksh or
+#       bash, then to run this script, type that shell name before the whole
+#       command line, like:
+#
+#           ksh Gradle
+#
+#       Busybox and similar reduced shells will NOT work, because this script
+#       requires all of these POSIX shell features:
+#         * functions;
+#         * expansions �$var�, �${var}�, �${var:-default}�, �${var+SET}�,
+#           �${var#prefix}�, �${var%suffix}�, and �$( cmd )�;
+#         * compound commands having a testable exit status, especially �case�;
+#         * various built-in commands including �command�, �set�, and �ulimit�.
+#
+#   Important for patching:
+#
+#   (2) This script targets any POSIX shell, so it avoids extensions provided
+#       by Bash, Ksh, etc; in particular arrays are avoided.
+#
+#       The "traditional" practice of packing multiple parameters into a
+#       space-separated string is a well documented source of bugs and security
+#       problems, so this is (mostly) avoided, by progressively accumulating
+#       options in "$@", and eventually passing that to Java.
+#
+#       Where the inherited environment variables (DEFAULT_JVM_OPTS, JAVA_OPTS,
+#       and GRADLE_OPTS) rely on word-splitting, this is performed explicitly;
+#       see the in-line comments for details.
+#
+#       There are tweaks for specific operating systems such as AIX, CygWin,
+#       Darwin, MinGW, and NonStop.
+#
+#   (3) This script is generated from the Groovy template
+#       https://github.com/gradle/gradle/blob/master/subprojects/plugins/src/main/resources/org/gradle/api/internal/plugins/unixStartScript.txt
+#       within the Gradle project.
+#
+#       You can find Gradle at https://github.com/gradle/gradle/.
+#
+##############################################################################
+
+# Attempt to set APP_HOME
+
+# Resolve links: $0 may be a link
+app_path=$0
+
+# Need this for daisy-chained symlinks.
+while
+    APP_HOME=${app_path%"${app_path##*/}"}  # leaves a trailing /; empty if no leading path
+    [ -h "$app_path" ]
+do
+    ls=$( ls -ld "$app_path" )
+    link=${ls#*' -> '}
+    case $link in             #(
+      /*)   app_path=$link ;; #(
+      *)    app_path=$APP_HOME$link ;;
+    esac
+done
+
+APP_HOME=$( cd "${APP_HOME:-./}" && pwd -P ) || exit
+
+APP_NAME="Gradle"
+APP_BASE_NAME=${0##*/}
+
+# Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+DEFAULT_JVM_OPTS='"-Xmx64m" "-Xms64m"'
+
+# Use the maximum available, or set MAX_FD != -1 to use that value.
+MAX_FD=maximum
+
+warn () {
+    echo "$*"
+} >&2
+
+die () {
+    echo
+    echo "$*"
+    echo
+    exit 1
+} >&2
+
+# OS specific support (must be 'true' or 'false').
+cygwin=false
+msys=false
+darwin=false
+nonstop=false
+case "$( uname )" in                #(
+  CYGWIN* )         cygwin=true  ;; #(
+  Darwin* )         darwin=true  ;; #(
+  MSYS* | MINGW* )  msys=true    ;; #(
+  NONSTOP* )        nonstop=true ;;
+esac
+
+CLASSPATH=$APP_HOME/gradle/wrapper/gradle-wrapper.jar
+
+
+# Determine the Java command to use to start the JVM.
+if [ -n "$JAVA_HOME" ] ; then
+    if [ -x "$JAVA_HOME/jre/sh/java" ] ; then
+        # IBM's JDK on AIX uses strange locations for the executables
+        JAVACMD=$JAVA_HOME/jre/sh/java
+    else
+        JAVACMD=$JAVA_HOME/bin/java
+    fi
+    if [ ! -x "$JAVACMD" ] ; then
+        die "ERROR: JAVA_HOME is set to an invalid directory: $JAVA_HOME
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+    fi
+else
+    JAVACMD=java
+    which java >/dev/null 2>&1 || die "ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+fi
+
+# Increase the maximum file descriptors if we can.
+if ! "$cygwin" && ! "$darwin" && ! "$nonstop" ; then
+    case $MAX_FD in #(
+      max*)
+        MAX_FD=$( ulimit -H -n ) ||
+            warn "Could not query maximum file descriptor limit"
+    esac
+    case $MAX_FD in  #(
+      '' | soft) :;; #(
+      *)
+        ulimit -n "$MAX_FD" ||
+            warn "Could not set maximum file descriptor limit to $MAX_FD"
+    esac
+fi
+
+# Collect all arguments for the java command, stacking in reverse order:
+#   * args from the command line
+#   * the main class name
+#   * -classpath
+#   * -D...appname settings
+#   * --module-path (only if needed)
+#   * DEFAULT_JVM_OPTS, JAVA_OPTS, and GRADLE_OPTS environment variables.
+
+# For Cygwin or MSYS, switch paths to Windows format before running java
+if "$cygwin" || "$msys" ; then
+    APP_HOME=$( cygpath --path --mixed "$APP_HOME" )
+    CLASSPATH=$( cygpath --path --mixed "$CLASSPATH" )
+
+    JAVACMD=$( cygpath --unix "$JAVACMD" )
+
+    # Now convert the arguments - kludge to limit ourselves to /bin/sh
+    for arg do
+        if
+            case $arg in                                #(
+              -*)   false ;;                            # don't mess with options #(
+              /?*)  t=${arg#/} t=/${t%%/*}              # looks like a POSIX filepath
+                    [ -e "$t" ] ;;                      #(
+              *)    false ;;
+            esac
+        then
+            arg=$( cygpath --path --ignore --mixed "$arg" )
+        fi
+        # Roll the args list around exactly as many times as the number of
+        # args, so each arg winds up back in the position where it started, but
+        # possibly modified.
+        #
+        # NB: a `for` loop captures its iteration list before it begins, so
+        # changing the positional parameters here affects neither the number of
+        # iterations, nor the values presented in `arg`.
+        shift                   # remove old arg
+        set -- "$@" "$arg"      # push replacement arg
+    done
+fi
+
+# Collect all arguments for the java command;
+#   * $DEFAULT_JVM_OPTS, $JAVA_OPTS, and $GRADLE_OPTS can contain fragments of
+#     shell script including quotes and variable substitutions, so put them in
+#     double quotes to make sure that they get re-expanded; and
+#   * put everything else in single quotes, so that it's not re-expanded.
+
+set -- \
+        "-Dorg.gradle.appname=$APP_BASE_NAME" \
+        -classpath "$CLASSPATH" \
+        org.gradle.wrapper.GradleWrapperMain \
+        "$@"
+
+# Use "xargs" to parse quoted args.
+#
+# With -n1 it outputs one arg per line, with the quotes and backslashes removed.
+#
+# In Bash we could simply go:
+#
+#   readarray ARGS < <( xargs -n1 <<<"$var" ) &&
+#   set -- "${ARGS[@]}" "$@"
+#
+# but POSIX shell has neither arrays nor command substitution, so instead we
+# post-process each arg (as a line of input to sed) to backslash-escape any
+# character that might be a shell metacharacter, then use eval to reverse
+# that process (while maintaining the separation between arguments), and wrap
+# the whole thing up as a single "set" statement.
+#
+# This will of course break if any of these variables contains a newline or
+# an unmatched quote.
+#
+
+eval "set -- $(
+        printf '%s\n' "$DEFAULT_JVM_OPTS $JAVA_OPTS $GRADLE_OPTS" |
+        xargs -n1 |
+        sed ' s~[^-[:alnum:]+,./:=@_]~\\&~g; ' |
+        tr '\n' ' '
+    )" '"$@"'
+
+exec "$JAVACMD" "$@"
\ No newline at end of file