core: implement /theme save and /theme del

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Add two complementary subcommands:

  /theme save <name> [-full]: writes a user theme file at
    ${weechat_config_dir}/themes/<name>.theme containing the current
    themable options. By default only options whose value differs from
    their default (config_file_option_has_changed) are written, which
    keeps the file small and focused. Pass "-full" to write every
    themable option (matches the format used by automatic backups).

    Name validation: refuses any name matching a built-in theme (those
    are reserved for in-memory registrations) and any name starting
    with "backup-" (reserved for /theme apply backups). Both checks
    print an error and abort without writing.

  /theme del <name>: removes ${weechat_config_dir}/themes/<name>.theme
    via unlink. Refuses to delete a name registered as a built-in
    theme (a built-in has no file on disk to delete, even if the user
    has a shadowing file of the same name they cannot remove it this
    way; they can rename or delete it manually).

The full-snapshot writer used by /theme apply backups is refactored
into theme_write_file (name, description, diff_only). It is reused
by theme_make_backup (diff_only=0) and theme_save (diff_only inverted
from the user's -full flag).

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This commit is contained in:

Sébastien Helleu

2026-07-04 17:02:12 +02:00

parent afaf7cf85b

commit a09bd50b92

18 changed files with 919 additions and 42 deletions

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tests/unit/core/test-core-theme.cpp

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