How does one load several tags-Files?

[Sabancay]

I can"t figure out, how I can load the tags for a library every time I enter a project. In particular, I am experimenting with the Julia language. I use a global cache.

volker[535]~/.cache/tags$ ls -1
'!opt!volker!_julia!packages!.tags'
'!opt!volker!projects!julia!dataframes_training!.tags'
'!opt!volker!projects!julia!plots_training!.tags'

Whenever I work on a Julia-project, I want the tags from my Julia library '!opt!volker!_julia!packages!.tags' to be available in addition to the project tags.
How would I configure citre to attain this?

[masatake]

I wonder universal-ctags/ctags#3304 (comment) and universal-ctags/ctags#3704 are related to this topic. (readtags is a tool used in citre internally.)

[Sabancay]

Thanks for the quick reply. I found a use case for etags on https://github.com/JuliaEditorSupport/julia-ctags. I was hoping to adapt the idea to Citre. Would it be possible to configure the variable citre-tags-file-alist to attain such a goal? If yes, could you help with an example?

(require 'etags-table)

(use-package julia-mode
:ensure t
:mode
("\.jl\'" . julia-mode)
:config
(setq etags-table-alist
'(
(".*\.jl$" "/home/volker/.julia/packages/TAGS")
))
(setq tags-case-fold-search nil)

...
)

[AmaiKinono]

It is possible for Citre to have such a feature, but that means to give up the sorter provided by readtags, and implement tags sorting in elisp, which is complicated, and runs slowly.

I would like to wait for universal-ctags/ctags#3704 to be solved, so Citre could use it directly.