Problem:
POSIX-compatible Ex-mode requires special-cases all over the codebase to
match various quirks that don't actually matter to users.
- The main utility of *interactive* Ex-mode is its REPL behavior, and
that can be achieved with `cmdwin`, which also gains extra UX
benefits.
- The main utility of *non-interactive* `nvim -es` is for shell
scripting, where Ex-mode quirks are mostly unhelpful (e.g. the
"Entering Ex mode" message).
Solution:
- Reimplement *interactive* Ex-mode as a "persistent, insert-mode
cmdwin" in Lua.
- "nvim -e/-E" is simply an alias to "gQ".
- Reframe *non-interactive* Ex-mode (`nvim -es`) as "script mode".
- Drop POSIX Ex-mode quirks.
Improvements:
- "nvim -V1 -es" output ends with a final newline!
- "nvim -V1 -es" no longer shows the "Entering Ex mode" msg. (This was
pointless noise, unwanted for scripting purposes.)
- stdin is no longer typeahead. Scripts (":lua io.read()") can read
stdin as data.
- Empty line is a no-op: a stray blank line no longer moves the cursor
(deviates from POSIX ex "+1"), no longer exits 1 at EOF (E501).
Preserved behavior:
- cursor starts at "$"
- mode()=="cv" (for non-interactive)
- multiline commands (:append/:function/heredoc pull continuation lines)
- bare-range print
- :print=>stdout
- -V1=>stderr
- CRLF input
- continue-after-error and exit codes
Dropped (regressed) POSIX behavior (non-interactive):
- Event loop only ticks while/between commands, not while blocked
waiting for a stdin line.
- ":g/pat/visual...Q"
- input()/getchar()/":s/x/y/c" no longer consume stdin lines as
answers: Nvim stops at end-of-input, skipping the rest of the script,
exit 0. Use ":lua io.read()" instead.
- If users care about this they should use interactive Ex-mode (`gQ`).
- ":@r" stops at end of the register instead of continuing to read
cmdline input from stdin.
Problem: ':delete #' silently fails to update "# and clobbers "0.
Solution: Treat "# like "/, writable only with :let and setreg().
closes: vim/vim#205927aeab74687
Co-authored-by: Doug Kearns <dougkearns@gmail.com>
Problem: some functions can be run from the sandbox
Solution: Block them, so they are not accessible from a modeline
(q1uf3ng)
closes: vim/vim#19975fcc4276db3
Co-authored-by: q1uf3ng <q1uf3ng@protone.me>
Problem: tests: test_excmd.vim leaves swapfiles behind
Solution: Close open buffer using :bw!
related: vim/vim#19975c922202ea2
Co-authored-by: Christian Brabandt <cb@256bit.org>
Problem: tests: Test_language_cmd fails on OpenBSD because the test
uses an invalid locale name and expects the command to produce
an error. OpenBSD accepts (almost) any locale name as valid by
design, so the :lang command succeeds and the test fails.
Solution: Slightly update the "bad" locale name to make it something
that OpenBSD considers invalid by adding a dot (but not ending
with ".UTF-8"). Maintain the original two underscores in the
name because that ensures Windows will also see it as invalid
(Kevin Goodsell).
closes: vim/vim#19280371583642a
Problem: Ex command is still executed after giving E1247.
Solution: Indicate the error properly and set cmd to NULL.
(zeertzjq)
closes: vim/vim#15241d1b5ea984d
Problem: :drop tries to :rewind the argumentlist, which results in E37
(after v9.1.0046)
Solution: instead of calling ex_rewind(), call open_buffer() only when
re-using the initial empty buffer
fixes: vim/vim#14219closes: vim/vim#14220978178823b
Co-authored-by: Christian Brabandt <cb@256bit.org>
Problem: [security]: overflow in ex address parsing
Solution: Verify that lnum is positive, before substracting from
LONG_MAX
[security]: overflow in ex address parsing
When parsing relative ex addresses one may unintentionally cause an
overflow (because LONG_MAX - lnum will overflow for negative addresses).
So verify that lnum is actually positive before doing the overflow
check.
060623e4a3
Co-authored-by: Christian Brabandt <cb@256bit.org>
