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# Conan 2.0 Profiles, Remotes and Global-Configuration and Usage

## 1. Overview

This directory contains Conan 2.0 profile files used to define the build configuration for our projects. They cover multiple architectures (`x64`, `armv8`) and GCC compiler versions (`9`, `13`, `14`).

## Quick-Start

To apply these configurations to your local Conan environment, use the `conan config install` command pointing to this repository.
Installs global.conf, remotes.json, and profiles automatically:

> ⚠️ **Warning:** This command will **overwrite** your existing [remotes.json](remotes.json) file. Any custom remotes you have configured will be replaced by the ones defined in this repository.
>
> **Please back up your existing remotes if needed!**


```bash
conan config install https://package-cloud.dns.army/ros2/conan2-config.git --type git
# or a specific branch/tag
conan config install https://package-cloud.dns.army/ros2/conan2-config.git --type git --args="--branch main"
```

For authenticated access (development), use:

```bash
export CONAN_USR=<your_username>
export CONAN_PSW=<your_password>
conan remote login package-cloud-ros2-conan2 $CONAN_USR -p $CONAN_PSW

# for development/nightly builds
conan remote login package-cloud-ros2-dev-conan2 $CONAN_USR -p $CONAN_PSW
# is disabled by default, enable it with:
conan remote enable package-cloud-ros2-dev-conan2
```

## 7. Requirements

- **Conan Client**: Version 2.0+ is required.

## 2. Naming Convention

The filenames follow a strict pattern to identify the target environment:

`{arch}_{os}_{compiler}_{version}[_{variant}]`

- **{arch}**: Target architecture (`x64`, `armv8`)
- **{os}**: Target operating system (`linux`)
- **{compiler}**: Compiler used (`gcc`)
- **{version}**: Major compiler version (`9`, `13`, `14`)
- **{variant}**: Optional suffix for specific cross-compilation toolchains (e.g., `croco` for ARMv8 Cross-Compilation toolchain)

## 3. Profile Types

### A. Base Profiles

*(e.g., `x64_linux_gcc_13`, `armv8_linux_gcc_14`)*

- Define the standard settings: `os`, `arch`, `compiler`, `build_type`, `cppstd`.
- Use the system-installed compiler or the default environment.
- **Content format example:**

```ini
[settings]
arch=x86_64
compiler=gcc
...
```

### B. Variant Profiles

*(e.g., `armv8_linux_gcc_13_croco`)*

- **EXTEND** base profiles using the `include()` directive.
- **INJECT** specific build tools via `[tool_requires]`.
- **"croco" variants** inject the `armv8-croco-toolchain` package for cross-compilation.

## 4. Usage

To use a profile, pass the filename to the Conan install or create command using the `-pr` (profile) argument.

**Example 1: Build for standard x64 Linux with GCC 14**

```bash
conan install . -pr x64_linux_gcc_14 --build=missing
```

**Example 2: Cross-compile for ARMv8 "Croco" target with GCC 9**

```bash
conan install . -pr armv8_linux_gcc_9_croco --build=missing
```

## 5. File List & Details

| Profile Filename           | Arch   | GCC Ver | Std   | Description                                    |
|:---------------------------|:-------|:--------|:------|:-----------------------------------------------|
| `x64_linux_gcc_9`          | x86_64 | 9       | gnu14 | Legacy x64 build for ubuntu-focal-20.04        |
| `x64_linux_gcc_13`         | x86_64 | 13      | gnu17 | Modern x64 build for ubuntu-jammy-22.04        |
| `x64_linux_gcc_14`         | x86_64 | 14      | gnu17 | Bleeding edge x64 for ubuntu-noble-24.04       |
| `armv8_linux_gcc_9`        | armv8  | 9       | gnu14 | Base ARMv8 GCC 9 for ubuntu-focal-20.04        |
| `armv8_linux_gcc_13`       | armv8  | 13      | gnu17 | Base ARMv8 GCC 13 for ubuntu-jammy-22.04       |
| `armv8_linux_gcc_14`       | armv8  | 14      | gnu17 | Base ARMv8 GCC 14 for ubuntu-noble-24.04       |
| `armv8_linux_gcc_9_croco`  | armv8  | 9       | gnu14 | Croco Toolchain (v9.3) for ubuntu-focal-20.04  |
| `armv8_linux_gcc_13_croco` | armv8  | 13      | gnu17 | Croco Toolchain (v13.3) for ubuntu-jammy-22.04 |
| `armv8_linux_gcc_14_croco` | armv8  | 14      | gnu17 | Croco Toolchain (v14.3) for ubuntu-noble-24.04 |

## 6. Global Configuration & Remotes

In addition to profiles, this repository provides standard configuration for the Conan client (`global.conf`) and package repositories (`remotes.json`).

### A. Global Configuration (`global.conf`)

This file defines core client behavior, optimizing for build performance and system integration.

- **Networking:**
  - `core.net.http:timeout`: Set to **6000** seconds to handle large downloads over VPN.
  - `core.download:parallel` / `core.upload:parallel`: Dynamically uses all available CPU cores (`{{os.cpu_count()}}`) for faster transfers.

- **System Integration:**
  - `tools.system.package_manager:mode`: Set to `install` (automatically installs system dependencies like apt packages).
  - `tools.system.package_manager:sudo`: Enabled (`True`) to allow sudo for system package installs.

### B. Remotes (`remotes.json`)

This file defines the upstream sources for packages. The order is critical for security and precedence.

| Order | Remote Name                     | URL                               | Usage                                                |
|:------|:--------------------------------|:----------------------------------|:-----------------------------------------------------|
| **1** | `package-cloud-ros2-conan2`     | `.../api/packages/ros2/conan`     | **Primary** source for stable production packages.   |
| **2** | `package-cloud-ros2-dev-conan2` | `.../api/packages/ros2-dev/conan` | **Secondary** source for development/nightly builds. |

**Important Note:** These remotes are hosted on `package-cloud.dns.army`. Ensure you have the necessary network access and credentials.

### C. Installation

To apply these configurations to your local Conan environment, use the `conan config install` command pointing to this repository:

> ⚠️ **Warning:** This command will **overwrite** your existing [remotes.json](remotes.json) file. Any custom remotes you have configured will be replaced by the ones defined in this repository.
>
> **Please back up your existing remotes if needed!**

```bash
conan config install https://package-cloud.dns.army/ros2/conan2-config.git --type git
# or a specific branch/tag
conan config install https://package-cloud.dns.army/ros2/conan2-config.git --type git --args="--branch main"
```

For authenticated access (development), use:

```bash
export CONAN_USR=<your_username>
export CONAN_PSW=<your_password>
conan remote login package-cloud-ros2-conan2 $CONAN_USR -p $CONAN_PSW

# for development/nightly builds
conan remote login package-cloud-ros2-dev-conan2 $CONAN_USR -p $CONAN_PSW
# is disabled by default, enable it with:
conan remote enable package-cloud-ros2-dev-conan2
```