### Setup and Regenerate Code

Source: https://github.com/xrplf/rippled/blob/develop/BUILD.md

Commands to set up a virtual environment and install dependencies for code generation, followed by regenerating the protocol wrapper classes. These commands should be run when macro definition files or generation scripts are modified.

```bash
cmake --build . --target setup_code_gen  # create venv and install dependencies (once)
```

```bash
cmake --build . --target code_gen        # regenerate code
```

--------------------------------

### Install xrpld from Source using CMake

Source: https://github.com/xrplf/rippled/blob/develop/docs/build/install.md

Use this command to install xrpld and libxrpl from a source build using CMake's --install mode. The --prefix flag specifies the installation directory.

```bash
cmake --install . --prefix /opt/local
```

--------------------------------

### Start xrpld Service Manually

Source: https://github.com/xrplf/rippled/blob/develop/docs/build/install.md

If the xrpld service does not start automatically, use this command to start it manually.

```bash
sudo systemctl start xrpld.service
```

--------------------------------

### Install and Use Pre-commit Hooks

Source: https://github.com/xrplf/rippled/blob/develop/CONTRIBUTING.md

Install pre-commit and its hooks to automatically format and lint code before each commit. This ensures code consistency.

```bash
pip3 install pre-commit
pre-commit install
```

--------------------------------

### Install xrpld Package

Source: https://github.com/xrplf/rippled/blob/develop/docs/build/install.md

Install the xrpld software package using the APT package manager.

```bash
sudo apt -y install xrpld
```

--------------------------------

### Install APT Utilities

Source: https://github.com/xrplf/rippled/blob/develop/docs/build/install.md

Install necessary utilities for managing APT packages, including transport for HTTPS, certificate handling, and downloading files.

```bash
sudo apt install -y apt-transport-https ca-certificates wget gnupg
```

--------------------------------

### Install xrpld Package

Source: https://github.com/xrplf/rippled/blob/develop/docs/build/install.md

Install the xrpld package using YUM.

```bash
sudo yum install -y xrpld
```

--------------------------------

### Install Boost with Conan

Source: https://github.com/xrplf/rippled/wiki/Fixing-rippled-build-errors

Command to install a specific version of Boost using Conan after adjusting the profile settings.

```bash
conan install boost/1.77.0@ --build
```

--------------------------------

### Enable xrpld Service

Source: https://github.com/xrplf/rippled/blob/develop/docs/build/install.md

Configure the xrpld service to automatically start when the system boots.

```bash
sudo systemctl enable xrpld.service
```

--------------------------------

### Install and Configure Specific Xcode Version

Source: https://github.com/xrplf/rippled/blob/develop/docs/build/environment.md

Installs a specific Xcode version and sets it as the default toolchain for the current session and persistently.

```bash
# Extract the .xip file and rename for version management
# Example: Xcode_16.2.app

# Move to Applications directory
sudo mv Xcode_16.2.app /Applications/

# Set as default toolchain (persistent)
sudo xcode-select -s /Applications/Xcode_16.2.app/Contents/Developer

# Set as environment variable (temporary)
export DEVELOPER_DIR=/Applications/Xcode_16.2.app/Contents/Developer
```

--------------------------------

### Install Conan profiles

Source: https://github.com/xrplf/rippled/blob/develop/BUILD.md

Installs the default Conan profiles from the specified directory. Ensure your Conan configuration directory is correctly set.

```bash
conan config install conan/profiles/ -tf $(conan config home)/profiles/
```

--------------------------------

### Clean Build Directory Setup

Source: https://github.com/xrplf/rippled/blob/develop/docs/build/sanitizers.md

Prepare a clean build directory for the xrpld project before building with sanitizers.

```bash
cd /path/to/rippled
rm -rf .build
mkdir .build
cd .build
```

--------------------------------

### Example Conan Profile Configuration

Source: https://github.com/xrplf/rippled/wiki/Conan-troubleshooting

A full example of a Conan profile, including settings, options, and build flags, suitable for specific project requirements like disabling concepts.

```ini
[settings]
os=Macos
os_build=Macos
arch=x86_64
arch_build=x86_64
compiler=apple-clang
compiler.version=15
compiler.libcxx=libc++
build_type=Release
compiler.cppstd=20
[options ]
boost:extra_b2_flags="define=BOOST_ASIO_HAS_STD_INVOKE_RESULT"
[conf]
tools.build:cflags=['-DBOOST_ASIO_HAS_STD_INVOKE_RESULT']
tools.build:cxxflags=['-DBOOST_ASIO_HAS_STD_INVOKE_RESULT']
tools.build:cxxflags+=["-DBOOST_ASIO_DISABLE_CONCEPTS"]
[build_requires]
[env]
CXXFLAGS=-DBOOST_ASIO_DISABLE_CONCEPTS
CFLAGS=-DBOOST_ASIO_HAS_STD_INVOKE_RESULT
CXXFLAGS=-DBOOST_ASIO_HAS_STD_INVOKE_RESULT
```

--------------------------------

### Install CMake with Homebrew

Source: https://github.com/xrplf/rippled/blob/develop/docs/build/environment.md

Installs CMake using the Homebrew package manager.

```bash
brew install cmake
```

--------------------------------

### Conan Install and CMake Build Configuration

Source: https://github.com/xrplf/rippled/blob/develop/docs/build/depend.md

This command sequence demonstrates how to install dependencies using Conan, generate CMake toolchain files, and then configure and build your project with CMake.

```bash
mkdir .build
cd .build
mkdir -p build/generators
conan install \
  --install-folder build/generators \
  --build missing \
  --settings build_type=Release \
  ..
cmake \
  -DCMAKE_TOOLCHAIN_FILE=build/generators/conan_toolchain.cmake \
  -DCMAKE_BUILD_TYPE=Release \
  ..
cmake --build . --parallel
```

--------------------------------

### Install Python, Pyenv, and Conan via Homebrew

Source: https://github.com/xrplf/rippled/blob/develop/docs/build/environment.md

Installs Homebrew, Python 3.11, and Conan using pyenv for Python version management.

```bash
/bin/bash -c "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/HEAD/install.sh)"
brew update
brew install xz
brew install pyenv
pyenv install 3.11
pyenv global 3.11
eval "$(pyenv init -)"
pip install 'conan'
```

--------------------------------

### Start rippled with a specific ledger hash

Source: https://github.com/xrplf/rippled/wiki/Starting-a-test---parallel-network-from-an-existing-ledger-state

Use this command to start the rippled server, initializing it with the state of a specified ledger hash. This is crucial for cloning an existing ledger state.

```bash
rippled --ledger <ledger hash>
```

--------------------------------

### Example Nix Development Shell Usage

Source: https://github.com/xrplf/rippled/blob/develop/docs/build/nix.md

Demonstrates how to enter the Nix development shell using specific compilers like GCC 14 or Clang 19, or the default compiler for the platform.

```bash
# Use GCC 14
nix develop .#gcc14

# Use Clang 19
nix develop .#clang19

# Use default for your platform
nix develop
```

--------------------------------

### Link Executable with xrpl Library

Source: https://github.com/xrplf/rippled/blob/develop/tests/conan/CMakeLists.txt

Defines an executable target named 'example', links it to the 'xrpl::libxrpl' library, and specifies its source files.

```cmake
find_package(xrpl CONFIG REQUIRED)

add_executable(example)
target_sources(example PRIVATE src/example.cpp)
target_link_libraries(example PRIVATE xrpl::libxrpl)
```

--------------------------------

### Create Build Directory

Source: https://github.com/xrplf/rippled/blob/develop/BUILD.md

Create a dedicated directory for build artifacts and navigate into it. This directory will be used by Conan as the installation folder.

```bash
mkdir .build
cd .build
```

--------------------------------

### Conan Install with Sanitizers

Source: https://github.com/xrplf/rippled/blob/develop/docs/build/sanitizers.md

Install dependencies using Conan with sanitizer instrumentation enabled. Ensure the SANITIZERS environment variable is set before running this command.

```bash
SANITIZERS=address,undefinedbehavior conan install .. --output-folder . --build missing --settings build_type=Debug --profile:all sanitizers
```

--------------------------------

### Build xrpld with jemalloc

Source: https://github.com/xrplf/rippled/blob/develop/docs/HeapProfiling.md

Use the scons command with the profile-jemalloc argument to link xrpld with the jemalloc library. Specify the jemalloc installation directory.

```bash
$ scons profile-jemalloc=/usr/local
```

```bash
$ scons clang profile-jemalloc=/opt/local
```

--------------------------------

### Start rippled Docker Container for Devnet

Source: https://github.com/xrplf/rippled/wiki/Running-rippled-with-Docker

Starts a rippled Docker container in detached mode and connects it to the devnet. Use this to quickly set up a node for testing.

```bash
# Start rippled connecting to the devnet
docker run --rm --detach --name rippled_devnet rippleci/rippled:2.2.0 dev
```

--------------------------------

### Example NuDB Configuration in rippled.cfg

Source: https://github.com/xrplf/rippled/wiki/server_state-stuck-in-connected-or-syncing

This configuration snippet shows how to set up NuDB as the node database in your `rippled.cfg` file. Ensure the specified path is writable by the rippled process and is empty.

```ini
[node_db]
type=nudb
path=/var/lib/rippled/dbnudb/nudb
advisory_delete=0

[database_path]
/var/lib/rippled/dbnudb
```

--------------------------------

### Example HTTP Upgrade Request

Source: https://github.com/xrplf/rippled/blob/develop/src/xrpld/overlay/README.md

This is an example of an HTTP request used to initiate an upgrade to the XRP Ledger protocol. It includes custom headers for protocol-specific information.

```http
GET / HTTP/1.1
User-Agent: xrpld-1.4.0-b1+DEBUG
Upgrade: RTXP/1.2, XRPL/2.0
Connection: Upgrade
Connect-As: Peer
Crawl: public
Network-ID: 1
Network-Time: 619234489
Public-Key: n94MvLTiHQJjByfGZzvQewTxQP2qjF6shQcuHwCjh5WoiozBrdpX
Session-Signature: MEUCIQCOO8tHOh/tgCSRNe6WwOwmIF6urZ5uSB8l9aAf5q7iRAIgA4aONKBZhpP5RuOuhJP2dP+2UIRioEJcfU4/m4gZdYo=
Remote-IP: 192.0.2.79
Closed-Ledger: llRZSKqvNieGpPqbFGnm358pmF1aW96SDIUQcnMh6HI=
Previous-Ledger: q4aKbP7sd5wv+EXArwCmQiWZhq9AwBl2p/hCtpGJNsc=
```

--------------------------------

### Install Conan Packages with Missing Build

Source: https://github.com/xrplf/rippled/wiki/Conan-troubleshooting

Use this command to install Conan packages, ensuring missing dependencies are built. It specifies the output folder and build type.

```bash
conan install .. --output-folder . --build missing --settings build_type=Debug
```

--------------------------------

### Example HTTP Upgrade Response (Failure: no slots available)

Source: https://github.com/xrplf/rippled/blob/develop/src/xrpld/overlay/README.md

This is an example of an HTTP 503 Service Unavailable response, indicating that the server cannot accept new connections, likely due to resource limitations. It includes a list of peer IPs.

```http
HTTP/1.1 503 Service Unavailable
Server: xrpld-0.27.0
Remote-Address: 63.104.209.13
Content-Length: 253
Content-Type: application/json
{"peer-ips":["54.68.219.39:51235","54.187.191.179:51235",
"107.150.55.21:6561","54.186.230.77:51235","54.187.110.243:51235",
"85.127.34.221:51235","50.43.33.236:51235","54.187.138.75:51235"]}
```

--------------------------------

### Example HTTP Upgrade Response (Success)

Source: https://github.com/xrplf/rippled/blob/develop/src/xrpld/overlay/README.md

This is an example of a successful HTTP 101 Switching Protocols response, indicating that the server has agreed to upgrade the connection to the XRP Ledger protocol.

```http
HTTP/1.1 101 Switching Protocols
Connection: Upgrade
Upgrade: RTXP/1.2
Connect-As: Peer
Server: xrpld-1.3.1
Crawl: public
Public-Key: n9K1ZXXXzzA3dtgKBuQUnZXkhygMRgZbSo3diFNPVHLMsUG5osJM
Session-Signature: MEQCIHMlLGTcGyPvHji7WY2nRM2B0iSBnw9xeDUGW7bPq7IjAiAmy+ofEu+8nOq2eChRTr3wjoKi3EYRqLgzP+q+ORFcig==
Network-Time: 619234797
Closed-Ledger: h7HL85W9ywkex+G7p42USVeV5kE04CWK+4DVI19Of8I=
Previous-Ledger: EPvIpAD2iavGFyyZYi8REexAXyKGXsi1jMF7OIBY6/Y=
```

--------------------------------

### Install Dependencies with Conan

Source: https://github.com/xrplf/rippled/blob/develop/BUILD.md

Use Conan to install dependencies and generate CMake build files. Specify the build type (Release or Debug) for different configurations. The `--build missing` flag ensures all required dependencies are built.

```bash
conan install .. --output-folder . --build missing --settings build_type=Release
```

```bash
conan install .. --output-folder . --build missing --settings build_type=Debug
```

--------------------------------

### Install Ccache on Windows with Specific Version

Source: https://github.com/xrplf/rippled/blob/develop/BUILD.md

When encountering std::bad_alloc errors during compilation on Windows, install a specific known-working version of ccache using Chocolatey.

```powershell
choco install ccache --version 4.11.3 --allow-downgrade
```

--------------------------------

### Check Database Size

Source: https://github.com/xrplf/rippled/wiki/Reducing-disk-usage-with-online_delete

Verify the disk space occupied by the rippled database. This example shows how to list the contents of the database directory and their sizes.

```bash
/rippled2/rippled/db
# ls -alh
total 887G
-rw-r--r-- 1 root root 882G Feb  9 22:07 transaction.db
...
```

--------------------------------

### Conan Install for Subdirectory Project and CMake Build

Source: https://github.com/xrplf/rippled/blob/develop/docs/build/depend.md

This command sequence installs dependencies for a project using a Git submodule and configures the CMake build with the Conan toolchain.

```bash
mkdir .build
cd .build
conan install \
  --output-folder . \
  --build missing \
  --settings build_type=Release \
  ../submodules/rippled
cmake \
  -DCMAKE_TOOLCHAIN_FILE=build/generators/conan_toolchain.cmake \
  -DCMAKE_BUILD_TYPE=Release \
  ..
cmake --build . --parallel
```

--------------------------------

### Start rippled with amendments enabled and silent

Source: https://github.com/xrplf/rippled/wiki/Starting-a-test-parallel-network-with-amendments-pre-enabled

Use this command to start a rippled instance with amendments enabled from the genesis ledger, running silently and using a specified configuration file.

```bash
rippled --start --net --silent --conf /etc/opt/ripple/rippled.cfg
```

--------------------------------

### Configure and Build Coverage Report with CMake

Source: https://github.com/xrplf/rippled/blob/develop/BUILD.md

Use this command to configure the build with coverage enabled and then build the coverage target. Ensure you are in the build directory and have installed dependencies via conan.

```bash
cd .build
conan install .. --output-folder . --build missing --settings build_type=Debug
cmake -DCMAKE_BUILD_TYPE=Debug -Dcoverage=ON -Dxrpld=ON -Dtests=ON -Dcoverage_test_parallelism=2 -Dcoverage_format=html-details -Dcoverage_extra_args="--json coverage.json" -DCMAKE_TOOLCHAIN_FILE:FILEPATH=build/generators/conan_toolchain.cmake ..
cmake --build . --target coverage
```

--------------------------------

### Basic XRPL Consensus Simulation Setup

Source: https://github.com/xrplf/rippled/blob/develop/src/test/csf/README.md

Sets up a simulation with 5 validators and 1 central hub, configuring their trust relationships and network connections. It then simulates transaction submission and measures the simulation duration.

```c++
Sim sim;
PeerGroup validators = sim.createGroup(5);
PeerGroup center = sim.createGroup(1);
PeerGroup network = validators + center;
center[0]->runAsValidator = false;

validators.trust(validators);
center.trust(validators);

using namespace std::chrono;
SimDuration delay = 200ms;
validators.connect(center, delay);

SimDurationCollector simDur;
sim.collectors.add(simDur);

// prep round to set initial state.
sim.run(1);

// everyone submits their own ID as a TX and relay it to peers
for (Peer * p : validators)
    p->submit(Tx(static_cast<std::uint32_t>(p->id)));

sim.run(1);

std::cout << (simDur.stop - simDur.start).count() << std::endl;
assert(sim.synchronized());
```

--------------------------------

### Build Package Script Help

Source: https://github.com/xrplf/rippled/blob/develop/package/README.md

Display help information for the `build_pkg.sh` script, showing available flags, their corresponding environment variables, default values, and purpose.

```bash
./package/build_pkg.sh --help
```

--------------------------------

### Install LLVM via Homebrew on macOS

Source: https://github.com/xrplf/rippled/blob/develop/docs/build/environment.md

Installs LLVM version 21 using Homebrew on macOS.

```bash
brew install llvm@21
```

--------------------------------

### Create Directories and Copy Configuration

Source: https://github.com/xrplf/rippled/wiki/Fixing-rippled-build-errors

Ensures necessary directories exist and copies the rippled configuration file. Use this when the build process fails due to missing configuration files.

```bash
sudo mkdir -p /etc/opt/ripple/
sudo cp /path/to/your/rippled.cfg /etc/opt/ripple/
```

--------------------------------

### Check xrpld Service Status

Source: https://github.com/xrplf/rippled/blob/develop/docs/build/install.md

Check the status of the xrpld service to ensure it has started automatically. If not, you can start it manually.

```bash
systemctl status xrpld.service
```

--------------------------------

### RelationalDatabase.cpp File Contents

Source: https://github.com/xrplf/rippled/blob/develop/src/xrpld/app/rdb/README.md

Implements the static method `RelationalDatabase::init` for initializing a `RelationalDatabase` instance.

```plaintext
RelationalDatabase.cpp  | Implements the static method `RelationalDatabase::init` which is used to initialize an instance of `RelationalDatabase`
```

--------------------------------

### Install LLVM and Clang-Tidy on Linux

Source: https://github.com/xrplf/rippled/blob/develop/docs/build/environment.md

Installs LLVM version 21 and clang-tidy-21 on Debian 12 using the official LLVM apt repository.

```bash
wget https://apt.llvm.org/llvm.sh
chmod +x llvm.sh
sudo ./llvm.sh 21
sudo apt install --yes clang-tidy-21
```

--------------------------------

### Conan Install with Build Type

Source: https://github.com/xrplf/rippled/blob/develop/BUILD.md

When installing dependencies with Conan, specify the build type using the --settings option. This ensures consistency with CMake.

```bash
conan install --settings build_type=Debug
```

--------------------------------

### Stop and restart rippled with systemd

Source: https://github.com/xrplf/rippled/wiki/Starting-a-test-parallel-network-with-amendments-pre-enabled

Instructions for stopping a rippled process running in the foreground and then starting it using systemd. Assumes amendments were enabled on initial start.

```bash
# Stop rippled in foreground: make sure the rippled process is killed. Then start with systemd
```

--------------------------------

### Enter Nix Development Shell

Source: https://github.com/xrplf/rippled/blob/develop/docs/build/nix.md

Use this command to enter the default Nix development shell for xrpld. It downloads and configures all necessary tools and compilers. The first run may take time.

```bash
nix --experimental-features 'nix-command flakes' develop
```

--------------------------------

### Initialize Sim and Peer Groups

Source: https://github.com/xrplf/rippled/blob/develop/src/test/csf/README.md

Initializes the simulation environment and creates distinct groups of peers. One peer in the 'center' group is configured not to run as a validator.

```c++
Sim sim;
PeerGroup validators = sim.createGroup(5);
PeerGroup center = sim.createGroup(1);
PeerGroup network = validators + center;
center[0]->runAsValidator = false;
```

--------------------------------

### Configure NodeStore Backend

Source: https://github.com/xrplf/rippled/blob/develop/include/xrpl/nodestore/README.md

Specify the NodeStore backend and its parameters in the [node_db] section of the configuration file. The 'type' parameter selects the database engine, 'path' defines the storage location, and 'compression' enables or disables data compression.

```ini
type=RocksDB
path=rocksdb
compression=1
```

--------------------------------

### Install GCC and Dependencies on Debian 12

Source: https://github.com/xrplf/rippled/blob/develop/docs/build/environment.md

Installs GCC version 12 and essential build tools like Python, Git, CMake, and Ninja on Debian 12. It also configures alternatives for C++ compilers.

```bash
export GCC_RELEASE=12
sudo apt update
sudo apt install --yes gcc-${GCC_RELEASE} g++-${GCC_RELEASE} python3-pip \
  python-is-python3 python3-venv python3-dev curl wget ca-certificates \
  git build-essential cmake ninja-build libc6-dev
sudo pip install --break-system-packages conan

sudo update-alternatives --install /usr/bin/cc cc /usr/bin/gcc-${GCC_RELEASE} 999
sudo update-alternatives --install \
  /usr/bin/gcc gcc /usr/bin/gcc-${GCC_RELEASE} 100 \
  --slave /usr/bin/g++ g++ /usr/bin/g++-${GCC_RELEASE} \
  --slave /usr/bin/gcc-ar gcc-ar /usr/bin/gcc-ar-${GCC_RELEASE} \
  --slave /usr/bin/gcc-nm gcc-nm /usr/bin/gcc-nm-${GCC_RELEASE} \
  --slave /usr/bin/gcc-ranlib gcc-ranlib /usr/bin/gcc-ranlib-${GCC_RELEASE} \
  --slave /usr/bin/gcov gcov /usr/bin/gcov-${GCC_RELEASE} \
  --slave /usr/bin/gcov-tool gcov-tool /usr/bin/gcov-tool-${GCC_RELEASE} \
  --slave /usr/bin/gcov-dump gcov-dump /usr/bin/gcov-dump-${GCC_RELEASE} \
  --slave /usr/bin/lto-dump lto-dump /usr/bin/lto-dump-${GCC_RELEASE}
sudo update-alternatives --auto cc
sudo update-alternatives --auto gcc
```

--------------------------------

### Run NodeStore Timing Benchmarks

Source: https://github.com/xrplf/rippled/blob/develop/include/xrpl/nodestore/README.md

Execute the NodeStore.Timing test to compare the performance of different nodestore backends. Alternate DB configuration parameters can be passed using the --unittest-arg flag.

```bash
$xrpld --unittest=NodeStoreTiming
```

--------------------------------

### Create Test Helper Library

Source: https://github.com/xrplf/rippled/blob/develop/src/tests/libxrpl/CMakeLists.txt

Defines a static library 'xrpl.helpers.test' to hold common test utility sources. It specifies private sources, public include directories, and links against libxrpl and GTest.

```cmake
add_library(xrpl.helpers.test STATIC)
target_sources(
    xrpl.helpers.test
    PRIVATE helpers/Account.cpp helpers/TestSink.cpp helpers/TxTest.cpp
)
target_include_directories(xrpl.helpers.test PUBLIC ${CMAKE_CURRENT_SOURCE_DIR})
target_link_libraries(xrpl.helpers.test PUBLIC xrpl.libxrpl gtest::gtest)
```

--------------------------------

### Wallet.h/.cpp File Contents

Source: https://github.com/xrplf/rippled/blob/develop/src/xrpld/app/rdb/README.md

Defines and implements methods for interacting with Wallet SQLite databases.

```plaintext
Wallet.[h|cpp]         | Defines/Implements methods for interacting with Wallet SQLite databases
```

--------------------------------

### Build xrpld Packages via CMake

Source: https://github.com/xrplf/rippled/blob/develop/package/README.md

Build xrpld packages directly on the host using CMake targets. This method does not require a Docker container but relies on the host having 'rpmbuild' or 'dpkg-buildpackage' installed. The packaging script installs to FHS-standard paths.

```bash
cmake \
  -Dxrpld=ON \
  -Dxrpld_version=2.4.0-local \
  -Dtests=OFF \
  ..

cmake --build . --target package
```

--------------------------------

### Fetch XRPL Repository

Source: https://github.com/xrplf/rippled/blob/develop/docs/build/install.md

After adding the repository, fetch the latest package information from the XRPL repository.

```bash
sudo apt -y update
```

--------------------------------

### Check Git Version on macOS

Source: https://github.com/xrplf/rippled/blob/develop/docs/build/environment.md

Verifies that Git is installed and accessible.

```bash
git --version
```

--------------------------------

### Check Conan Version

Source: https://github.com/xrplf/rippled/wiki/Conan-troubleshooting

Verifies the installed version of the Conan package manager.

```bash
conan --version
```

--------------------------------

### Checkout release branch

Source: https://github.com/xrplf/rippled/blob/develop/BUILD.md

Switch to the release branch to build the latest release candidate.

```bash
git checkout release
```

--------------------------------

### Build xrpld Packages Locally with Docker

Source: https://github.com/xrplf/rippled/blob/develop/package/README.md

This command builds xrpld packages locally using Docker, mirroring the CI process. It requires an xrpld binary to be present at 'build/xrpld'. The package format is inferred from the container's package manager.

```bash
IMAGE=$(jq -r '
  .os | map(select(.package == true))[0] |
  "ghcr.io/xrplf/ci/\(.distro_name)-\(.distro_version):\(.compiler_name)-\(.compiler_version)-sha-\(.image_sha)"
' .github/scripts/strategy-matrix/linux.json)

VERSION=2.4.0-local
PKG_RELEASE=1

docker run --rm \
  -v "$(pwd):/src" \
  -w /src \
  "$IMAGE" \
  ./package/build_pkg.sh --pkg-version "$VERSION" --pkg-release "$PKG_RELEASE"
```

--------------------------------

### Check Clang Version

Source: https://github.com/xrplf/rippled/wiki/Conan-troubleshooting

Displays the version and target information for the installed Apple Clang compiler.

```bash
clang --version
```

--------------------------------

### Clean and Build rippled

Source: https://github.com/xrplf/rippled/wiki/Fixing-rippled-build-errors

Steps to clean previous build artifacts, set up Conan, configure CMake, and build the rippled project.

```bash
git checkout 2.2.3
```

```bash
rm -rf .build
mkdir .build
cd .build
```

```bash
START=$(date +%s) && \
conan install .. --output-folder . --build missing --settings build_type=Debug && \
END=$(date +%s) && \
echo "Setting up Conan took $((END-START)) seconds"
```

```bash
cmake -DCMAKE_TOOLCHAIN_FILE:FILEPATH=build/generators/conan_toolchain.cmake -DCMAKE_BUILD_TYPE=Debug -Dxrpld=ON -Dtests=ON ..
```

```bash
START=$(date +%s) && \
cmake --build . -j $(nproc) && \
END=$(date +%s) && \
echo "Building rippled took $((END-START)) seconds"
```

```bash
START=$(date +%s) && \
./rippled --unittest --unittest-jobs $(if [ $(uname) = 'Darwin' ]; then echo '1'; else echo "$(nproc)"; fi) && \
END=$(date +%s) && \
echo "Testing rippled took $((END-START)) seconds"
```

--------------------------------

### Print Simulation Duration

Source: https://github.com/xrplf/rippled/blob/develop/src/test/csf/README.md

Prints the total duration of the simulation by subtracting the start time from the stop time of the SimDurationCollector.

```c++
std::cout << (simDur.stop - simDur.start).count() << std::endl;
```

--------------------------------

### Prepare Release Branch and Update Version

Source: https://github.com/xrplf/rippled/blob/develop/CONTRIBUTING.md

Creates a new 'release-next' branch from 'upstream/develop' and updates the version string in the BuildInfo.cpp file. This is a prerequisite for making a new release.

```bash
git fetch upstreams

git checkout --no-track -B release-next upstream/develop

v="A.B.C-bD"
build=$( find -name BuildInfo.cpp )
sed 's/\(^.*versionString =\).*$/\1 "'${v}'"/' ${build} > version.cpp && mv -vi version.cpp ${build}

git diff

git add ${build}

git commit -S -m "Set version to ${v}"

# You could use your "origin" repo, but some CI tests work better on upstream.
git push upstream-push
git fetch upstreams
git branch --set-upstream-to=upstream/release-next
```

--------------------------------

### Exporting a Local libxrpl Recipe with Conan

Source: https://github.com/xrplf/rippled/blob/develop/docs/build/depend.md

If the desired libxrpl version is not available on ConanCenter, you can export the recipe directly from the xrpld project.

```bash
conan export <path>
```