Contributions#

Contributor license requirements#

All contributions must be Apache 2.0 compatible#

By contributing to BIOMASS BPS, you agree that your contributions will be licensed under the Apache License 2.0.

This means:

  • You retain copyright ownership of your contributions

  • You grant the BIOMASS BPS project (and all users) a perpetual, worldwide, non-exclusive, royalty-free license to use, modify, and distribute your contributions under Apache 2.0

  • You have the right to submit the contribution

  • Your contribution does not violate any third-party rights

License headers in source files#

Required header format#

All source code files should include a license header. The preferred format is the SPDX short-form (required for REUSE compliance):

# SPDX-FileCopyrightText: 2026 BIOMASS BPS Contributors
#
# SPDX-License-Identifier: Apache-2.0

The long-form Apache header is also accepted for backwards compatibility:

# Copyright [Year] BIOMASS BPS Contributors
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#     http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

Language-specific headers#

  • Python: Use # comments

  • JavaScript/TypeScript: Use // or /* */ comments

  • C/C++: Use // or /* */ comments

  • Rust: Use // comments

  • Other languages: Follow language-specific comment conventions

Files that do not need headers#

The following files typically don’t need license headers:

  • Configuration files (YAML, JSON, TOML)

  • Data files

  • Generated files

  • Very short utility scripts (use your judgment)

License compliance checklist for contributors#

Before submitting a Pull Request, verify:

  • All new code is your original work or properly attributed

  • All external dependencies are Apache 2.0 compatible

  • License information is documented in the PR description

  • Source files include SPDX headers (SPDX-FileCopyrightText + SPDX-License-Identifier: Apache-2.0)

  • reuse lint passes locally (or pre-commit reuse hook passes)

  • NOTICE file is updated (if required)

  • No GPL or other incompatible code is included

  • Third-party code snippets are properly attributed

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