|
| 1 | +"""Create a subset of a lock file with a subset of packages.""" |
| 2 | + |
| 3 | +from __future__ import annotations |
| 4 | + |
| 5 | +import asyncio |
| 6 | +import json |
| 7 | +import os |
| 8 | +import tempfile |
| 9 | +from collections import defaultdict |
| 10 | + |
| 11 | +from rattler import ( |
| 12 | + Environment, |
| 13 | + GenericVirtualPackage, |
| 14 | + LockFile, |
| 15 | + Platform, |
| 16 | + Version, |
| 17 | + solve_with_sparse_repodata, |
| 18 | +) |
| 19 | +from rattler.channel import Channel, ChannelConfig |
| 20 | +from rattler.match_spec import MatchSpec |
| 21 | +from rattler.repo_data import SparseRepoData |
| 22 | + |
| 23 | + |
| 24 | +def create_repodata_from_pixi_lock(lock_file_path: str) -> dict[str, dict]: |
| 25 | + """Create repodata from a pixi lock file.""" |
| 26 | + lock_file = LockFile.from_path(lock_file_path) |
| 27 | + env = lock_file.default_environment() |
| 28 | + repodata = {} |
| 29 | + for platform in env.platforms(): |
| 30 | + subdir = str(platform) |
| 31 | + packages = env.conda_repodata_records_for_platform(platform) |
| 32 | + if not packages: |
| 33 | + continue |
| 34 | + |
| 35 | + repodata[subdir] = { |
| 36 | + "info": { |
| 37 | + "subdir": subdir, |
| 38 | + "base_url": f"https://conda.anaconda.org/conda-forge/{subdir}", |
| 39 | + }, |
| 40 | + "packages": { |
| 41 | + f"{pkg.name.normalized}-{pkg.version}-{pkg.build}.conda": { |
| 42 | + "build": pkg.build, |
| 43 | + "build_number": pkg.build_number, |
| 44 | + "depends": pkg.depends, |
| 45 | + "constrains": pkg.constrains, |
| 46 | + "license": pkg.license, |
| 47 | + "license_family": pkg.license_family, |
| 48 | + "md5": pkg.md5.hex() if pkg.md5 else None, |
| 49 | + "name": pkg.name.normalized, |
| 50 | + "sha256": pkg.sha256.hex() if pkg.sha256 else None, |
| 51 | + "size": pkg.size, |
| 52 | + "subdir": pkg.subdir, |
| 53 | + "timestamp": int(pkg.timestamp.timestamp() * 1000) |
| 54 | + if pkg.timestamp |
| 55 | + else None, |
| 56 | + "version": str(pkg.version), |
| 57 | + } |
| 58 | + for pkg in packages |
| 59 | + }, |
| 60 | + "repodata_version": 2, |
| 61 | + } |
| 62 | + return repodata |
| 63 | + |
| 64 | + |
| 65 | +def _version_requirement_to_lowest_version(version: str | None) -> str | None: |
| 66 | + if version is None: |
| 67 | + return None |
| 68 | + if version.startswith(">="): |
| 69 | + version = version[2:] |
| 70 | + if version.startswith("=="): |
| 71 | + version = version[2:] |
| 72 | + version = version.split(",")[0] |
| 73 | + return version # noqa: RET504 |
| 74 | + |
| 75 | + |
| 76 | +def all_virtual_packages(env: Environment) -> dict[Platform, set[str]]: |
| 77 | + """Get all virtual packages from an environment.""" |
| 78 | + virtual_packages = defaultdict(set) |
| 79 | + for platform, packages in env.packages_by_platform().items(): |
| 80 | + for package in packages: |
| 81 | + if not package.is_conda: |
| 82 | + continue |
| 83 | + repo_record = package.as_conda() |
| 84 | + for dep in repo_record.depends: |
| 85 | + spec = MatchSpec(dep) |
| 86 | + if spec.name.normalized.startswith("__"): |
| 87 | + version = _version_requirement_to_lowest_version(spec.version) |
| 88 | + virtual_package = GenericVirtualPackage( |
| 89 | + spec.name, |
| 90 | + version=Version(version or "0"), |
| 91 | + build_string=spec.build or "*", |
| 92 | + ) |
| 93 | + virtual_packages[platform].add(virtual_package) |
| 94 | + return virtual_packages |
| 95 | + |
| 96 | + |
| 97 | +async def create_subset_lock_file( |
| 98 | + original_lock_file_path: str, |
| 99 | + required_packages: list[str], |
| 100 | + platform: Platform, |
| 101 | +) -> LockFile: |
| 102 | + """Create a new lock file with a subset of packages from original lock file.""" |
| 103 | + original_lock_file = LockFile.from_path(original_lock_file_path) |
| 104 | + env = original_lock_file.default_environment() |
| 105 | + conda_records = env.conda_repodata_records_for_platform(platform) |
| 106 | + if conda_records is None: |
| 107 | + msg = f"No conda records found for platform {platform}" |
| 108 | + raise ValueError(msg) |
| 109 | + repodata = create_repodata_from_pixi_lock(original_lock_file_path) |
| 110 | + platform_repodata = repodata.get(str(platform)) |
| 111 | + if platform_repodata is None: |
| 112 | + msg = f"No repodata found for platform {platform}" |
| 113 | + raise ValueError(msg) |
| 114 | + |
| 115 | + with tempfile.NamedTemporaryFile( |
| 116 | + mode="w", |
| 117 | + delete=False, |
| 118 | + suffix=".json", |
| 119 | + ) as temp_file: |
| 120 | + json.dump(platform_repodata, temp_file) |
| 121 | + temp_file_path = temp_file.name |
| 122 | + print(f"Temporary repodata file: {temp_file_path}") |
| 123 | + dummy_channel = Channel("dummy", ChannelConfig()) |
| 124 | + sparse_repo_data = SparseRepoData(dummy_channel, str(platform), temp_file_path) |
| 125 | + specs = [MatchSpec(pkg) for pkg in required_packages] |
| 126 | + virtual_packages = all_virtual_packages(env)[platform] |
| 127 | + |
| 128 | + solved_records = await solve_with_sparse_repodata( |
| 129 | + specs=specs, |
| 130 | + sparse_repodata=[sparse_repo_data], |
| 131 | + locked_packages=conda_records, |
| 132 | + virtual_packages=virtual_packages, |
| 133 | + ) |
| 134 | + new_env = Environment("new_env", {platform: solved_records}) |
| 135 | + new_lock_file = LockFile({"new_env": new_env}) |
| 136 | + os.unlink(temp_file_path) # noqa: PTH108 |
| 137 | + return new_lock_file |
| 138 | + |
| 139 | + |
| 140 | +async def main() -> None: |
| 141 | + """Example usage of create_subset_lock_file.""" |
| 142 | + original_lock_file_path = "pixi.lock" |
| 143 | + required_packages = ["tornado", "scipy", "ipykernel", "adaptive"] |
| 144 | + platform = Platform("linux-64") |
| 145 | + new_lock_file = await create_subset_lock_file( |
| 146 | + original_lock_file_path, |
| 147 | + required_packages, |
| 148 | + platform, |
| 149 | + ) |
| 150 | + new_lock_file.to_path("new_lock_file.lock") |
| 151 | + |
| 152 | + |
| 153 | +if __name__ == "__main__": |
| 154 | + asyncio.run(main()) |
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