debian-mirror-gitlab/doc/user/packages/conan_repository/index.md
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---
stage: Package
group: Package
info: To determine the technical writer assigned to the Stage/Group associated with this page, see https://about.gitlab.com/handbook/engineering/ux/technical-writing/#assignments
---
# Conan packages in the Package Registry
> - [Introduced](https://gitlab.com/gitlab-org/gitlab/-/issues/8248) in [GitLab Premium](https://about.gitlab.com/pricing/) 12.6.
> - [Moved](https://gitlab.com/gitlab-org/gitlab/-/issues/221259) to GitLab Core in 13.3.
Publish Conan packages in your projects Package Registry. Then install the
packages whenever you need to use them as a dependency.
To publish Conan packages to the Package Registry, add the Package Registry as a
remote and authenticate with it.
Then you can run `conan` commands and publish your package to the
Package Registry.
## Build a Conan package
This section explains how to install Conan and build a package for your C/C++
project.
If you already use Conan and know how to build your own packages, go to the
[next section](#add-the-package-registry-as-a-conan-remote).
### Install Conan
Download the Conan package manager to your local development environment by
following the instructions at [conan.io](https://conan.io/downloads.html).
When installation is complete, verify you can use Conan in your terminal by
running:
```shell
conan --version
```
The Conan version is printed in the output:
```plaintext
Conan version 1.20.5
```
### Install CMake
When you develop with C++ and Conan, you can select from many available
compilers. This example uses the CMake compiler.
To install CMake:
- For Mac, use [Homebrew](https://brew.sh/) and run `brew install cmake`.
- For other operating systems, follow the instructions at [cmake.org](https://cmake.org/install/).
When installation is complete, verify you can use CMake in your terminal by
running:
```shell
cmake --version
```
The CMake version is printed in the output.
### Create a project
To test the Package Registry, you need a C++ project. If you don't already have
one, you can clone the Conan [hello world starter project](https://github.com/conan-io/hello).
### Build a package
To build a package:
1. Open a terminal and navigate to your project's root folder.
1. Generate a new recipe by running `conan new` with a package name and version:
```shell
conan new Hello/0.1 -t
```
1. Create a package for the recipe by running `conan create` with the Conan user
and channel:
```shell
conan create . mycompany/beta
```
NOTE:
If you use an [instance remote](#add-a-remote-for-your-instance), you must
follow a specific [naming convention](#package-recipe-naming-convention-for-instance-remotes).
A package with the recipe `Hello/0.1@mycompany/beta` is created.
For more details about creating and managing Conan packages, see the
[Conan documentation](https://docs.conan.io/en/latest/creating_packages.html).
## Add the Package Registry as a Conan remote
To run `conan` commands, you must add the Package Registry as a Conan remote for
your project or instance.
### Add a remote for your project
> [Introduced](https://gitlab.com/gitlab-org/gitlab/-/issues/11679) in GitLab 13.4.
Set a remote so you can work with packages in a project without
having to specify the remote name in every command.
When you set a remote for a project, there are no restrictions to your package names.
However, your commands must include the full recipe, including the user and channel,
for example, `package_name/version@user/channel`.
To add the remote:
1. In your terminal, run this command:
```shell
conan remote add gitlab https://gitlab.example.com/api/v4/projects/<project_id>/packages/conan
```
1. Use the remote by adding `--remote=gitlab` to the end of your Conan command.
For example:
```shell
conan search Hello* --all --remote=gitlab
```
### Add a remote for your instance
Use a single remote to access packages across your entire GitLab instance.
However, when using this remote, you must follow these
[package naming restrictions](#package-recipe-naming-convention-for-instance-remotes).
To add the remote:
1. In your terminal, run this command:
```shell
conan remote add gitlab https://gitlab.example.com/api/v4/packages/conan
```
1. Use the remote by adding `--remote=gitlab` to the end of your Conan command.
For example:
```shell
conan search 'Hello*' --remote=gitlab
```
#### Package recipe naming convention for instance remotes
The standard Conan recipe convention is `package_name/version@user/channel`, but
if you're using an [instance remote](#add-a-remote-for-your-instance), the
recipe `user` must be the plus sign (`+`) separated project path.
Example recipe names:
| Project | Package | Supported |
| ---------------------------------- | ----------------------------------------------- | --------- |
| `foo/bar` | `my-package/1.0.0@foo+bar/stable` | Yes |
| `foo/bar-baz/buz` | `my-package/1.0.0@foo+bar-baz+buz/stable` | Yes |
| `gitlab-org/gitlab-ce` | `my-package/1.0.0@gitlab-org+gitlab-ce/stable` | Yes |
| `gitlab-org/gitlab-ce` | `my-package/1.0.0@foo/stable` | No |
[Project remotes](#add-a-remote-for-your-project) have a more flexible naming
convention.
## Authenticate to the Package Registry
To authenticate to the Package Registry, you need either a personal access token
or deploy token.
- If you use a [personal access token](../../../user/profile/personal_access_tokens.md),
set the scope to `api`.
- If you use a [deploy token](../../project/deploy_tokens/index.md), set the
scope to `read_package_registry`, `write_package_registry`, or both.
### Add your credentials to the GitLab remote
Associate your token with the GitLab remote, so that you don't have to
explicitly add a token to every Conan command.
Prerequisites:
- You must have an authentication token.
- The Conan remote [must be configured](#add-the-package-registry-as-a-conan-remote).
In a terminal, run this command. In this example, the remote name is `gitlab`.
Use the name of your remote.
```shell
conan user <gitlab_username or deploy_token_username> -r gitlab -p <personal_access_token or deploy_token>
```
Now when you run commands with `--remote=gitlab`, your username and password are
included in the requests.
Alternatively, you can explicitly include your credentials in any given command.
For example:
```shell
CONAN_LOGIN_USERNAME=<gitlab_username or deploy_token_username> CONAN_PASSWORD=<personal_access_token or deploy_token> conan upload Hello/0.1@mycompany/beta --all --remote=gitlab
```
NOTE:
Because your authentication with GitLab expires on a regular basis, you may
occasionally need to re-enter your personal access token.
### Set a default remote for your project (optional)
If you want to interact with the GitLab Package Registry without having to
specify a remote, you can tell Conan to always use the Package Registry for your
packages.
In a terminal, run this command:
```shell
conan remote add_ref Hello/0.1@mycompany/beta gitlab
```
NOTE:
The package recipe includes the version, so the default remote for
`Hello/0.1@user/channel` doesn't work for `Hello/0.2@user/channel`.
If you don't set a default user or remote, you can still include the user and
remote in your commands:
```shell
`CONAN_LOGIN_USERNAME=<gitlab_username or deploy_token_username> CONAN_PASSWORD=<personal_access_token or deploy_token> <conan command> --remote=gitlab
```
## Publish a Conan package
Publish a Conan package to the Package Registry, so that anyone who can access
the project can use the package as a dependency.
Prerequisites:
- The Conan remote [must be configured](#add-the-package-registry-as-a-conan-remote).
- [Authentication](#authenticate-to-the-package-registry) with the
Package Registry must be configured.
- A local [Conan package](https://docs.conan.io/en/latest/creating_packages/getting_started.html)
must exist.
- For an instance remote, the package must meet the [naming convention](#package-recipe-naming-convention-for-instance-remotes).
- You must have the project ID, which is on the project's homepage.
To publish the package, use the `conan upload` command:
```shell
conan upload Hello/0.1@mycompany/beta --all
```
## Publish a Conan package by using CI/CD
> [Introduced](https://gitlab.com/gitlab-org/gitlab/-/issues/11678) in [GitLab Premium](https://about.gitlab.com/pricing/) 12.7.
To work with Conan commands in [GitLab CI/CD](../../../ci/README.md), you can
use `CI_JOB_TOKEN` in place of the personal access token in your commands.
You can provide the `CONAN_LOGIN_USERNAME` and `CONAN_PASSWORD` with each Conan
command in your `.gitlab-ci.yml` file. For example:
```yaml
image: conanio/gcc7
create_package:
stage: deploy
script:
- conan remote add gitlab https://gitlab.example.com/api/v4/packages/conan
- conan new <package-name>/0.1 -t
- conan create . <group-name>+<project-name>/stable
- CONAN_LOGIN_USERNAME=ci_user CONAN_PASSWORD=${CI_JOB_TOKEN} conan upload <package-name>/0.1@<group-name>+<project-name>/stable --all --remote=gitlab
```
Additional Conan images to use as the basis of your CI file are available in the
[Conan docs](https://docs.conan.io/en/latest/howtos/run_conan_in_docker.html#available-docker-images).
## Install a Conan package
Install a Conan package from the Package Registry so you can use it as a
dependency.
Conan packages are often installed as dependencies by using the `conanfile.txt`
file.
Prerequisites:
- The Conan remote [must be configured](#add-the-package-registry-as-a-conan-remote).
- [Authentication](#authenticate-to-the-package-registry) with the
Package Registry must be configured.
1. In the project where you want to install the package as a dependency, open
`conanfile.txt`. Or, in the root of your project, create a file called
`conanfile.txt`.
1. Add the Conan recipe to the `[requires]` section of the file:
```plaintext
[requires]
Hello/0.1@mycompany/beta
[generators]
cmake
```
1. At the root of your project, create a `build` directory and change to that
directory:
```shell
mkdir build && cd build
```
1. Install the dependencies listed in `conanfile.txt`:
```shell
conan install .. <options>
```
NOTE:
If you try to install the package you just created in this tutorial, the package
already exists on your local computer, so this command has no effect.
## Remove a Conan package
There are two ways to remove a Conan package from the GitLab Package Registry.
- From the command line, using the Conan client:
```shell
conan remove Hello/0.2@user/channel --remote=gitlab
```
You must explicitly include the remote in this command, otherwise the package
is removed only from your local system cache.
NOTE:
This command removes all recipe and binary package files from the
Package Registry.
- From the GitLab user interface:
Go to your project's **Packages & Registries > Package Registry**. Remove the
package by clicking the red trash icon.
## Search for Conan packages in the Package Registry
To search by full or partial package name, or by exact recipe, run the
`conan search` command.
- To search for all packages with a specific package name:
```shell
conan search Hello --remote=gitlab
```
- To search for a partial name, like all packages starting with `He`:
```shell
conan search He* --remote=gitlab
```
The scope of your search includes all projects you have permission to access.
This includes your private projects as well as all public projects.
## Fetch Conan package information from the Package Registry
The `conan info` command returns information about a package:
```shell
conan info Hello/0.1@mycompany/beta
```
## Supported CLI commands
The GitLab Conan repository supports the following Conan CLI commands:
- `conan upload`: Upload your recipe and package files to the Package Registry.
- `conan install`: Install a Conan package from the Package Registry, which
includes using the `conanfile.txt` file.
- `conan search`: Search the Package Registry for public packages, and private
packages you have permission to view.
- `conan info`: View the information on a given package from the Package Registry.
- `conan remove`: Delete the package from the Package Registry.