Problem: Currently `update()` and `del()` silently ignore input plugin
names that are not for already installed plugin. This might lead to
confusion because they are not explicitly reported.
Solution: Check that all input names are for installed plugins and error
otherwise.
Problem: using `print()` to show progress report writes to `stdout` when
in `--headless` mode (interferes with the testing output) and doesn't
allow coloring.
Solution: use `nvim_echo` with colored chunks.
Problem: Sourcing of 'after/plugin' scripts depends on the value of
'loadplugins' option. It is redundant, as it has effect only during
startup, while it is combined with `vim.v.vim_did_enter == 1` (i.e.
"it is after starting up") condition.
Solution: Ignore it.
Problem: `attempt to yield across metamethod/C-call boundary` error when
trying to use `vim.pack.add()`.
Solution: use `pcall()` variant from 'coxpcall' on non-LuaJIT version of
Lua.
Problem: On canceling the update (triggering `WinClosed`), the tab page
will most probably be closed too. Closing some other tab page while the
confirmation buffer is open also changes tab page numbers. We are trying
to close the wrong tab page in both cases.
Solution: save the tab page ID, and attempt to get the tab page number
from the ID when closing the buffer.
Problem:
Error when adding a plugin will make all following plugins not
`:packadd`ed
Solution:
- add() should handle errors from :packadd with pcall()
Co-authored-by: Evgeni Chasnovski <evgeni.chasnovski@gmail.com>
Co-authored-by: Justin M. Keyes <justinkz@gmail.com>
