Expose ACP versions of the base/script/user paths #76
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The standard encoding for all the top level paths (base, script, user) in SimpleGraphic is UTF-8. For some purposes it's useful to know if the path can be expressed in the user's active codepage as well, the updater can use it to form absolute paths that the OS understands. As the user path is fallible, we also expose a human-readable reason as to why it could not be obtained. All paths are made weakly canonical rather than fully canonical as the full flavour requires paths to fully exist.
Whenever an invalid code unit was detected, a placeholder should be emitted. This change fixes a bug where it also wrote out the original code unit as-is.
Wires77
approved these changes
Sep 21, 2025
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This PR makes the three path query functions also expose an ACP encoding of the path if possible. The user path query can now also return a human-readable reason when it can't be obtained from the OS.
This is useful for scripts as they can now tell if paths can be expressed in the user's codepage.
This enables an use case in the update preparation logic where it can form absolute paths if the path is entirely within the ACP. When relative paths were in use there to work around that the path could be unspellable, the wrong directory could be operated on thanks to filesystem virtualisation.