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How can I use yasnippet to invoke LaTeX commands interactively?
If I use auctex to insert \usepackage it starts a minibuffer which lets me select the desired package (including tab completion). Similar for other commands like includegraphics. Is it possible to make yasnippet to do the same, i.e. help me choosing the package or image etc.?
You can tell yasnippet to interpret its type as a command rather than a snippet to interpret the body as lisp code.
The following example allows you to enter LaTeX environments (e.g., as if you had used C-c C-e):
# -*- mode: snippet -*-
# name: environment
# key: env
# type: command
# --
(call-interactively #'LaTeX-environment)
And here's another option to insert the \includegraphics macro:
# -*- mode: snippet -*-
# name: includegraphics
# key: ingr
# type: command
# --
(TeX-insert-macro "includegraphics")
includegraphics. I tried this one: # -*- mode: snippet -*- # name: image # key: img # type: command # -- (call-interactively #'TeX-insert-macro "includegraphics") but it doesn't work.
\includegraphics. TeX-insert-macro is a function that requires an argument in this case (see its docstring by C-x f TeX-insert-macro RET), which is why it's not called with call-interactively. Take a look at the following links to get started with learning a little Emacs lisp if you'd like to know more: intro manual, Bastien Guerry's 15-minute intro, and the EmacsWiki node.
\includegraphics and does nothing more. Additionally it is very slow.
M-x TeX-insert-macro (you need to make sure that auctex recognizes your \usepackage{graphicx}). Second, you will need to enter the appropriate parameters in the minibuffer when it prompts. Third, if will allow you to do completion in a more friendly way if you use something like ido-mode.
M-x TeX-insert-macro includgraphics didn't work. However in other directories it works. Seems a bit strange, but again, thanks a lot!