conan config¶

Manage the Conan configuration in the Conan home.

conan config home¶

$ conan config home -h
WARN: Downgrading cache from Conan 2.1.0 to 2.0.17
usage: conan config home [-h] [-v [V]]

Show the Conan home folder.

options:
  -h, --help  show this help message and exit
  -v [V]      Level of detail of the output. Valid options from less verbose
              to more verbose: -vquiet, -verror, -vwarning, -vnotice,
              -vstatus, -v or -vverbose, -vv or -vdebug, -vvv or -vtrace

The conan config home command returns the path of the Conan home folder.

$ conan config home

/home/user/.conan2

conan config install¶

$ conan config install -h
WARN: Downgrading cache from Conan 2.1.0 to 2.0.17
usage: conan config install [-h] [-v [V]] [--verify-ssl [VERIFY_SSL] |
                            --insecure] [-t {git,dir,file,url}] [-a ARGS]
                            [-sf SOURCE_FOLDER] [-tf TARGET_FOLDER]
                            item

Install the configuration (remotes, profiles, conf), from git, http or a
folder, into the Conan home folder.

positional arguments:
  item                  git repository, local file or folder or zip file
                        (local or http) where the configuration is stored

options:
  -h, --help            show this help message and exit
  -v [V]                Level of detail of the output. Valid options from less
                        verbose to more verbose: -vquiet, -verror, -vwarning,
                        -vnotice, -vstatus, -v or -vverbose, -vv or -vdebug,
                        -vvv or -vtrace
  --verify-ssl [VERIFY_SSL]
                        Verify SSL connection when downloading file
  --insecure            Allow insecure server connections when using SSL.
                        Equivalent to --verify-ssl=False
  -t {git,dir,file,url}, --type {git,dir,file,url}
                        Type of remote config
  -a ARGS, --args ARGS  String with extra arguments for "git clone"
  -sf SOURCE_FOLDER, --source-folder SOURCE_FOLDER
                        Install files only from a source subfolder from the
                        specified origin
  -tf TARGET_FOLDER, --target-folder TARGET_FOLDER
                        Install to that path in the conan cache

The conan config install command is intended to install in the current home a common shared Conan configuration, like the definitions of remotes, profiles, settings, hooks, extensions, etc.

The command can use as source any of the following:

A URL pointing to a zip archive containing the configuration files
A git repository containing the files
A local folder
Just one file

Files in the current Conan home will be replaced by the ones from the installation source. All the configuration files can be shared and installed this way:

remotes.json for the definition of remotes
Any custom profile files inside a profiles subfolder
Custom settings.yml
Custom global.conf
All the extensions, including plugins, hooks.
Custom user commands.

This command reads a .conanignore file which, if present, filters which files and folders are copied over to the user’s Conan home folder. This file uses fnmatch patterns to match over the folder contents, excluding those entries that match from the config installation. See conan-io/command-extensions’s .conanignore for an example of such a file.

Examples:

Install the configuration from a URL:

$ conan config install http://url/to/some/config.zip

Install the configuration from a URL, but only getting the files inside a origin folder inside the zip file, and putting them inside a target folder in the local cache:
```
$ conan config install http://url/to/some/config.zip -sf=origin -tf=target
```

Install configuration from 2 different zip files from 2 different urls, using different source and target folders for each one, then update all:

$ conan config install http://url/to/some/config.zip -sf=origin -tf=target
$ conan config install http://url/to/some/config.zip -sf=origin2 -tf=target2
$ conan config install http://other/url/to/other.zip -sf=hooks -tf=hooks

Install the configuration from a Git repository with submodules:
```
$ conan config install http://github.com/user/conan_config/.git --args "--recursive"
```
You can also force the git download by using --type git (in case it is not deduced from the URL automatically):
```
$ conan config install http://github.com/user/conan_config/.git --type git
```
Install from a URL skipping SSL verification:
```
$ conan config install http://url/to/some/config.zip --verify-ssl=False
```
This will disable the SSL check of the certificate.

Install a specific file from a local path:

$ conan config install my_settings/settings.yml

Install the configuration from a local path:

$ conan config install /path/to/some/config.zip

conan config list¶

$ conan config list -h
WARN: Downgrading cache from Conan 2.2.3 to 2.0.17
usage: conan config list [-h] [-f FORMAT] [-v [V]]

Show all the Conan available configurations: core and tools.

options:
  -h, --help            show this help message and exit
  -f FORMAT, --format FORMAT
                        Select the output format: json
  -v [V]                Level of detail of the output. Valid options from less
                        verbose to more verbose: -vquiet, -verror, -vwarning,
                        -vnotice, -vstatus, -v or -vverbose, -vv or -vdebug,
                        -vvv or -vtrace

Displays all the Conan built-in configurations. There are 2 groups:

core.xxxx: These can only be defined in global.conf and are used by Conan internally
tools.xxxx: These can be defined both in global.conf and profiles, and will be used by recipes and tools used within recipes, like CMakeToolchain

$ conan config list
WARN: Downgrading cache from Conan 2.2.3 to 2.0.17
core.cache:storage_path: Absolute path where the packages and database are stored
core.download:download_cache: Define path to a file download cache
core.download:parallel: Number of concurrent threads to download packages
core.download:retry: Number of retries in case of failure when downloading from Conan server
core.download:retry_wait: Seconds to wait between download attempts from Conan server
core.gzip:compresslevel: The Gzip compression level for Conan artifacts (default=9)
core.net.http:cacert_path: Path containing a custom Cacert file
core.net.http:clean_system_proxy: If defined, the proxies system env-vars will be discarded
core.net.http:client_cert: Path or tuple of files containing a client cert (and key)
core.net.http:max_retries: Maximum number of connection retries (requests library)
core.net.http:no_proxy_match: List of urls to skip from proxies configuration
core.net.http:proxies: Dictionary containing the proxy configuration
core.net.http:timeout: Number of seconds without response to timeout (requests library)
core.package_id:default_build_mode: By default, 'None'
core.package_id:default_embed_mode: By default, 'full_mode'
core.package_id:default_non_embed_mode: By default, 'minor_mode'
core.package_id:default_python_mode: By default, 'minor_mode'
core.package_id:default_unknown_mode: By default, 'semver_mode'
core.sources:download_cache: Folder to store the sources backup
core.sources:download_urls: List of URLs to download backup sources from
core.sources:exclude_urls: URLs which will not be backed up
core.sources:upload_url: Remote URL to upload backup sources to
core.upload:retry: Number of retries in case of failure when uploading to Conan server
core.upload:retry_wait: Seconds to wait between upload attempts to Conan server
core.version_ranges:resolve_prereleases: Whether version ranges can resolve to pre-releases or not
core:allow_uppercase_pkg_names: Temporarily (will be removed in 2.X) allow uppercase names
core:default_build_profile: Defines the default build profile ('default' by default)
core:default_profile: Defines the default host profile ('default' by default)
core:non_interactive: Disable interactive user input, raises error if input necessary
core:required_conan_version: Raise if current version does not match the defined range.
core:skip_warnings: Do not show warnings matching any of the patterns in this list. Current warning tags are 'network', 'deprecated'
core:warnings_as_errors: Treat warnings matching any of the patterns in this list as errors and then raise an exception. Current warning tags are 'network', 'deprecated'
tools.android:cmake_legacy_toolchain: Define to explicitly pass ANDROID_USE_LEGACY_TOOLCHAIN_FILE in CMake toolchain
tools.android:ndk_path: Argument for the CMAKE_ANDROID_NDK
tools.apple:enable_arc: (boolean) Enable/Disable ARC Apple Clang flags
tools.apple:enable_bitcode: (boolean) Enable/Disable Bitcode Apple Clang flags
tools.apple:enable_visibility: (boolean) Enable/Disable Visibility Apple Clang flags
tools.apple:sdk_path: Path to the SDK to be used
tools.build.cross_building:can_run: Bool value that indicates whether is possible to run a non-native app on the same architecture. It's used by 'can_run' tool
tools.build:cflags: List of extra C flags used by different toolchains like CMakeToolchain, AutotoolsToolchain and MesonToolchain
tools.build:compiler_executables: Defines a Python dict-like with the compilers path to be used. Allowed keys {'c', 'cpp', 'cuda', 'objc', 'objcxx', 'rc', 'fortran', 'asm', 'hip', 'ispc'}
tools.build:cxxflags: List of extra CXX flags used by different toolchains like CMakeToolchain, AutotoolsToolchain and MesonToolchain
tools.build:defines: List of extra definition flags used by different toolchains like CMakeToolchain and AutotoolsToolchain
tools.build:download_source: Force download of sources for every package
tools.build:exelinkflags: List of extra flags used by CMakeToolchain for CMAKE_EXE_LINKER_FLAGS_INIT variable
tools.build:jobs: Default compile jobs number -jX Ninja, Make, /MP VS (default: max CPUs)
tools.build:linker_scripts: List of linker script files to pass to the linker used by different toolchains like CMakeToolchain, AutotoolsToolchain, and MesonToolchain
tools.build:sharedlinkflags: List of extra flags used by CMakeToolchain for CMAKE_SHARED_LINKER_FLAGS_INIT variable
tools.build:skip_test: Do not execute CMake.test() and Meson.test() when enabled
tools.build:sysroot: Pass the --sysroot=<tools.build:sysroot> flag if available. (None by default)
tools.build:verbosity: Verbosity of build systems if set. Possible values are 'quiet' and 'verbose'
tools.cmake.cmake_layout:build_folder_vars: Settings and Options that will produce a different build folder and different CMake presets names
tools.cmake.cmaketoolchain:find_package_prefer_config: Argument for the CMAKE_FIND_PACKAGE_PREFER_CONFIG
tools.cmake.cmaketoolchain:generator: User defined CMake generator to use instead of default
tools.cmake.cmaketoolchain:presets_environment: String to define wether to add or not the environment section to the CMake presets. Empty by default, will generate the environment section in CMakePresets. Can take values: 'disabled'.
tools.cmake.cmaketoolchain:system_name: Define CMAKE_SYSTEM_NAME in CMakeToolchain
tools.cmake.cmaketoolchain:system_processor: Define CMAKE_SYSTEM_PROCESSOR in CMakeToolchain
tools.cmake.cmaketoolchain:system_version: Define CMAKE_SYSTEM_VERSION in CMakeToolchain
tools.cmake.cmaketoolchain:toolchain_file: Use other existing file rather than conan_toolchain.cmake one
tools.cmake.cmaketoolchain:toolset_arch: Toolset architecture to be used as part of CMAKE_GENERATOR_TOOLSET in CMakeToolchain
tools.cmake.cmaketoolchain:user_toolchain: Inject existing user toolchains at the beginning of conan_toolchain.cmake
tools.cmake:cmake_program: Path to CMake executable
tools.cmake:install_strip: Add --strip to cmake.install()
tools.compilation:verbosity: Verbosity of compilation tools if set. Possible values are 'quiet' and 'verbose'
tools.deployer:symlinks: Set to False to disable deployers copying symlinks
tools.env.virtualenv:powershell: If it is set to True it will generate powershell launchers if os=Windows
tools.files.download:retry: Number of retries in case of failure when downloading
tools.files.download:retry_wait: Seconds to wait between download attempts
tools.files.download:verify: If set, overrides recipes on whether to perform SSL verification for their downloaded files. Only recommended to be set while testing
tools.gnu:define_libcxx11_abi: Force definition of GLIBCXX_USE_CXX11_ABI=1 for libstdc++11
tools.gnu:host_triplet: Custom host triplet to pass to Autotools scripts
tools.gnu:make_program: Indicate path to make program
tools.gnu:pkg_config: Path to pkg-config executable used by PkgConfig build helper
tools.google.bazel:bazelrc_path: List of paths to bazelrc files to be used as 'bazel --bazelrc=rcpath1 ... build'
tools.google.bazel:configs: List of Bazel configurations to be used as 'bazel build --config=config1 ...'
tools.graph:skip_binaries: Allow the graph to skip binaries not needed in the current configuration (True by default)
tools.info.package_id:confs: List of existing configuration to be part of the package ID
tools.intel:installation_path: Defines the Intel oneAPI installation root path
tools.intel:setvars_args: Custom arguments to be passed onto the setvars.sh|bat script from Intel oneAPI
tools.meson.mesontoolchain:backend: Any Meson backend: ninja, vs, vs2010, vs2012, vs2013, vs2015, vs2017, vs2019, xcode
tools.meson.mesontoolchain:extra_machine_files: List of paths for any additional native/cross file references to be appended to the existing Conan ones
tools.microsoft.bash:active: If Conan is already running inside bash terminal in Windows
tools.microsoft.bash:path: The path to the shell to run when conanfile.win_bash==True
tools.microsoft.bash:subsystem: The subsystem to be used when conanfile.win_bash==True. Possible values: msys2, msys, cygwin, wsl, sfu
tools.microsoft.msbuild:installation_path: VS install path, to avoid auto-detect via vswhere, like C:/Program Files (x86)/Microsoft Visual Studio/2019/Community. Use empty string to disable
tools.microsoft.msbuild:max_cpu_count: Argument for the /m when running msvc to build parallel projects
tools.microsoft.msbuild:vs_version: Defines the IDE version (15, 16, 17) when using the msvc compiler. Necessary if compiler.version specifies a toolset that is not the IDE default
tools.microsoft.msbuilddeps:exclude_code_analysis: Suppress MSBuild code analysis for patterns
tools.microsoft.msbuildtoolchain:compile_options: Dictionary with MSBuild compiler options
tools.microsoft:winsdk_version: Use this winsdk_version in vcvars
tools.system.package_manager:mode: Mode for package_manager tools: 'check', 'report', 'report-installed' or 'install'
tools.system.package_manager:sudo: Use 'sudo' when invoking the package manager tools in Linux (False by default)
tools.system.package_manager:sudo_askpass: Use the '-A' argument if using sudo in Linux to invoke the system package manager (False by default)
tools.system.package_manager:tool: Default package manager tool: 'apk', 'apt-get', 'yum', 'dnf', 'brew', 'pacman', 'choco', 'zypper', 'pkg' or 'pkgutil'

conan config show¶

$ conan config show -h
WARN: Downgrading cache from Conan 2.2.3 to 2.0.17
usage: conan config show [-h] [-f FORMAT] [-v [V]] pattern

Get the value of the specified conf

positional arguments:
  pattern               Conf item(s) pattern for which to query their value

options:
  -h, --help            show this help message and exit
  -f FORMAT, --format FORMAT
                        Select the output format: json
  -v [V]                Level of detail of the output. Valid options from less
                        verbose to more verbose: -vquiet, -verror, -vwarning,
                        -vnotice, -vstatus, -v or -vverbose, -vv or -vdebug,
                        -vvv or -vtrace

Shows the values of the conf items that match the given pattern.

For a global.conf consisting of

tools.build:jobs=42
tools.files.download:retry_wait=10
tools.files.download:retry=7
core.net.http:timeout=30
core.net.http:max_retries=5
zlib*/:tools.files.download:retry_wait=100
zlib*/:tools.files.download:retry=5

You can get all the values:

$ conan config show "*"

core.net.http:max_retries: 5
core.net.http:timeout: 30
tools.files.download:retry: 7
tools.files.download:retry_wait: 10
tools.build:jobs: 42
zlib*/:tools.files.download:retry: 5
zlib*/:tools.files.download:retry_wait: 100

Or just those referring to the tools.files section:

$ conan config show "*tools.files*"

tools.files.download:retry: 7
tools.files.download:retry_wait: 10
zlib*/:tools.files.download:retry: 5
zlib*/:tools.files.download:retry_wait: 100

Notice the first * in the pattern. This will match all the package patterns. Removing it will make the command only show global confs:

$ conan config show "tools.files*"

tools.files.download:retry: 7
tools.files.download:retry_wait: 10