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97 lines
3.9 KiB
97 lines
3.9 KiB
3 years ago
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# SPDX-License-Identifier: Apache-2.0
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# Copyright © 2022-2023 Intel Corporation
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"""Convert Cargo versions into Meson compatible ones."""
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from __future__ import annotations
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import typing as T
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def convert(cargo_ver: str) -> T.List[str]:
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"""Convert a Cargo compatible version into a Meson compatible one.
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:param cargo_ver: The version, as Cargo specifies
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:return: A list of version constraints, as Meson understands them
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"""
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# Cleanup, just for safety
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cargo_ver = cargo_ver.strip()
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cargo_vers = [c.strip() for c in cargo_ver.split(',')]
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out: T.List[str] = []
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for ver in cargo_vers:
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# This covers >= and =< as well
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# https://doc.rust-lang.org/cargo/reference/specifying-dependencies.html#comparison-requirements
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if ver.startswith(('>', '<', '=')):
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out.append(ver)
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elif ver.startswith('~'):
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# Rust has these tilde requirements, which means that it is >= to
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# the version, but less than the next version
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# https://doc.rust-lang.org/cargo/reference/specifying-dependencies.html#tilde-requirements
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# we convert those into a pair of constraints
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v = ver[1:].split('.')
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out.append(f'>= {".".join(v)}')
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if len(v) == 3:
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out.append(f'< {v[0]}.{int(v[1]) + 1}.0')
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elif len(v) == 2:
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out.append(f'< {v[0]}.{int(v[1]) + 1}')
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else:
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out.append(f'< {int(v[0]) + 1}')
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elif '*' in ver:
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# Rust has astrisk requirements,, which are like 1.* == ~1
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# https://doc.rust-lang.org/cargo/reference/specifying-dependencies.html#wildcard-requirements
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v = ver.split('.')[:-1]
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if v:
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out.append(f'>= {".".join(v)}')
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if len(v) == 2:
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out.append(f'< {v[0]}.{int(v[1]) + 1}')
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elif len(v) == 1:
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out.append(f'< {int(v[0]) + 1}')
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else:
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# a Caret version is equivalent to the default strategy
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# https://doc.rust-lang.org/cargo/reference/specifying-dependencies.html#caret-requirements
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if ver.startswith('^'):
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ver = ver[1:]
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# If there is no qualifier, then it means this or the next non-zero version
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# That means that if this is `1.1.0``, then we need `>= 1.1.0` && `< 2.0.0`
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# Or if we have `0.1.0`, then we need `>= 0.1.0` && `< 0.2.0`
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# Or if we have `0.1`, then we need `>= 0.1.0` && `< 0.2.0`
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# Or if we have `0.0.0`, then we need `< 1.0.0`
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# Or if we have `0.0`, then we need `< 1.0.0`
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# Or if we have `0`, then we need `< 1.0.0`
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# Or if we have `0.0.3`, then we need `>= 0.0.3` && `< 0.0.4`
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# https://doc.rust-lang.org/cargo/reference/specifying-dependencies.html#specifying-dependencies-from-cratesio
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#
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# this works much like the ~ versions, but in reverse. Tilde starts
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# at the patch version and works up, to the major version, while
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# bare numbers start at the major version and work down to the patch
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# version
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vers = ver.split('.')
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min_: T.List[str] = []
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max_: T.List[str] = []
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bumped = False
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for v_ in vers:
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if v_ != '0' and not bumped:
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min_.append(v_)
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max_.append(str(int(v_) + 1))
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bumped = True
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else:
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if not (bumped and v_ == '0'):
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min_.append(v_)
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if not bumped:
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max_.append('0')
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# If there is no minimum, don't emit one
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if set(min_) != {'0'}:
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out.append('>= {}'.format('.'.join(min_)))
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if set(max_) != {'0'}:
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out.append('< {}'.format('.'.join(max_)))
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else:
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out.append('< 1')
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return out
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