Conan Hooks

Repository to develop experimental Conan hooks for Conan >= 1.8.

• Conan Center
• Attribute checker
• Binary linter
• Github updater
• Member typo checker
• SPDX checker
• Recipe linter
• Non ASCII
• YAML linter
• Reduce conandata.yml

Hook setup

Place your hook Python files under ~/.conan/hooks. The name of the hook would be the same one as the file name.

*~/.conan/hooks/conan-center.py

Only copying hook files will not activate them.

Conan config as installer

To install all hooks from Conan repository in Github:

$ conan config install https://github.com/conan-io/hooks.git

If you are using Conan >=1.14 you can specify the source and destination folder to avoid copying undesired files to your local cache:

$ conan config install https://github.com/conan-io/hooks.git -sf hooks -tf hooks

Conan config install does not activate any hook.

Hook activation

You can activate any hook with:

$ conan config set hooks.conan-center

If you handle multiple dependencies in your project is better to add a conan.conf:

    [hooks]
    attribute_checker
    conan-center_reviewer

Hooks

These are the hooks currently available in this repository

Conan Center

This hook does checks for the inclusion guidelines of third-party libraries in Conan Center.

It is mostly intended for users who want to contribute packages to Conan Center. With this hook they will test some of the requirements in the guidelines, as this hook will check for recipe metadata, binary matching... during the conan create step and will output the result of each check as OK, WARNING or ERROR:

[HOOK - conan-center_reviewer.py] pre_export(): [RECIPE METADATA] OK
[HOOK - conan-center_reviewer.py] pre_export(): [HEADER ONLY] OK
[HOOK - conan-center_reviewer.py] pre_export(): [NO COPY SOURCE] OK
[HOOK - conan-center_reviewer.py] pre_export(): [FPIC OPTION] OK
[HOOK - conan-center_reviewer.py] pre_export(): [FPIC MANAGEMENT] 'fPIC' option not found
[HOOK - conan-center_reviewer.py] pre_export(): [VERSION RANGES] OK
[HOOK - conan-center_reviewer.py] post_package(): ERROR: [PACKAGE LICENSE] No package licenses found in: ~/
.conan/data/name/version/jgsogo/test/package/3475bd55b91ae904ac96fde0f106a136ab951a5e. Please
 package the library license to a 'licenses' folder
[HOOK - conan-center_reviewer.py] post_package(): [DEFAULT PACKAGE LAYOUT] OK
[HOOK - conan-center_reviewer.py] post_package(): [MATCHING CONFIGURATION] OK
[HOOK - conan-center_reviewer.py] post_package(): [SHARED ARTIFACTS] OK

If you want the hook to fail the execution, if an error is reported, you can adjust the environment variable CONAN_HOOK_ERROR_LEVEL:

• CONAN_HOOK_ERROR_LEVEL=40 it will raise if any error happen.
• CONAN_HOOK_ERROR_LEVEL=30 it will raise if any error or warning happen.

Conan 2.x support

The Conan Center hook is NOT supported by Conan v2 yet. Do not try to run this file with Conan v2.

There is an effort on the disabled-hook_conan-center-v2.py, but is not updated and should be broken by now.

The support for Conan 2.x should be rethinked first, because others items like linter and extensions should be considered too.

Attribute checker

This hook checks that some important attributes are present in the ConanFile: url, license and description, and will output a warning for the missing ones.

Binary Linter

This Conan hook validates produced binary artifacts of the given package.

Binaries stored in the package folder are checked for compatibility with package settings and options.

Currently, the following checks are performed:

• Binary format (Mach-O, ELF or PE)
• Architecture
• No shared libraries are produced for shared=False
• Visual Studio runtime library in use

The hook uses LIEF library in order to perform its checks.

The hook is automatically called when package command is executed.

GitHub Updater

This Conan hook reads your recipe and updates its GitHub repository properties using the attributes.

The following attributes are updated:

• homepage

• description

• topics

It's necessary to pass GitHub token by environment variable: GITHUB_TOKEN.

Members Typo checker

This pre_export() hook checks ConanFile's members for potential typos, for example:

from conans import ConanFile

class ConanRecipe(ConanFile):
    name = "name"
    version = "version"

    export_sources = "OH_NO"

Will produce the next warning:

pre_export(): WARN: The 'export_sources' member looks like a typo. Similar to:
pre_export(): WARN:     exports_sources

SPDX checker

This Conan hook validates that conanfile's license attribute specifies valid license identifier(s) from the SPDX license list.

The hook uses spdx_lookup python module in order to perform its checks.

Use pip install spdx_lookup in order to install required dependency.

The hook is automatically called when export command is executed.

Recipe linter

This hook runs Pylint over the recipes before exporting them (it runs in the pre_export hook), it can be really useful to check for typos, code flaws or company standards.

There several environment variables you can use to configure it:

• CONAN_PYLINTRC: path to a configuration file to fully customize Pylint behavior.
• CONAN_PYLINT_WERR: if set, linting errors will trigger a ConanException.
• CONAN_PYLINT_RECIPE_PLUGINS: list of modules (comma separated list) to load. They are used to register additional checker or dynamic fields before running the linter. By default it points to the conans.pylint_plugin module distributed together with Conan, this file contains the declaration of some extra fields that are valid in the ConanFile class.

This hook requires additional dependencies to work: pip install pylint astroid.

Non ASCII

Separate KB-H047 from Conan Center, which is no longer required due Python 2.7 deprecation.

Validates if conanfile.py and test_package/conanfile.py contain a non-ascii present, when there is a character, it logs an error.

YAML linter

This hook runs yamllint over the yaml files in a recipe before exporting them (it runs in the pre_export hook), it can be really useful to check for typos.

This hook requires additional dependencies to work: pip install yamllint.

Reduce conandata.yml

Same as KB-H031, but for conan 2.0. Reduces conandata.yml files, keeping only entry for the current package version. It only helps to avoid generation of extra recipe revisions in case of adding new versions.

License

MIT License