38410f5432
`bump-cask-pr` was recently updated to add Linux support but the change to the `replace_version_and_checksum` logic has broken the command for casks that have on_system blocks that reference specific macOS versions (e.g., `on_monterey :or_newer` in `logi-options+`). The previous logic only simulated the arch, so the `current_os` value on macOS was a specific version like `:sequoia`. The current logic uses generic `:macos` values, which work for `on_macos` blocks but don't work for blocks like `on_sequoia`, etc. This leads to an `undefined method 'latest?' for nil` error, as `old_cask.version` is `nil` in this scenario (i.e., none of the on_system blocks apply to `:macos`, so `version` is never set). This updates the method to only specify the OS in `system_options` if the value doesn't align with the host (e.g., `:linux` on macOS), which restores the previous behavior. This also replaces `:macos` values with the newest macOS version (e.g., `:sequoia`), so that `bump-cask-pr` on Linux can update casks with on_system blocks that reference specific macOS versions. A generic `:macos` value doesn't work with those on_system blocks, so `version` is never called on Linux in that scenario but it works as expected if we use the newest macOS value instead. This may not be perfect but it brings `bump-cask-pr` a little closer to parity with macOS on Linux. Lastly, this skips `system_options` values where `old_cask` has no version, as this means the cask doesn't apply to that OS/arch. We've been seeing a related error on homebrew/cask autobump CI and this guard should help to avoid it.
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