[neomutt-devel] MXAPI - Path functions

[Richard Russon]

I'm still working on my 'accounts' code, but that's meant changing a lot
of other code.  Most recently the Mailbox API.

Currently, the mailbox code knows a lot about the mailbox backends.
Also, some of the backends have references to $folder.

I've added four new functions to the Mailbox API:

    // Does this mailbox type recognise this path?
    int path_probe(const char *path, const struct stat *st);

    // Canonicalise a mailbox path
    int path_canon(char *buf, size_t buflen, const char *folder);

    // Abbreviate a mailbox path
    int path_pretty(char *buf, size_t buflen, const char *folder);

    // Find the parent of a mailbox path
    int path_parent(char *buf, size_t buflen);

This means that the backends are now responsible for managing their paths.
The common path manipulation code has been moved into `mutt/path.c`,
including new functions:

    bool mutt_path_canon(char *buf, size_t buflen, const char *homedir);
    bool mutt_path_pretty(char *buf, size_t buflen, const char *homedir);
    bool mutt_path_abbr_folder(char *buf, size_t buflen, const char *folder);

These changes are another step closer to Account-local $folder config values.

Cheers,
    Rich / FlatCap
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