[READY] Improve path to python interpreter error handling
YCM returns the cryptic error `YouCompleteMe unavailable: [Errno 2] No such file or directory` when the Python interpreter path used to start the server doesn't exist. See issues https://github.com/Valloric/YouCompleteMe/issues/2773 and https://github.com/Valloric/YouCompleteMe/issues/2775.
This PR improves that by using the `FindExecutable` and `GetExecutable` functions from ycmd to check if the Python interpreter path exists (and is an executable) and by returning a much more helpful message if it doesn't. We use `FindExecutable` instead of `GetExecutable` on the `g:ycm_server_python_interpreter` option so that the user can specify a Python path with just the executable name (e.g. `python`, `python2`, `python3`).
This also fixes a Python traceback in Vim that occurs when, after successfully starting the server, the `g:ycm_server_python_interpreter` option is set to an invalid path and the server is restarted with `:YcmRestartServer`. Steps to reproduce are:
- start Vim with a working YCM;
- type `:let g:ycm_server_python_interpreter = '/invalid/python/path'`;
- type `:YcmRestartServer`.
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Calling directly the omnifunc may move the cursor position. This is the case
with the default Vim omnifunc for C-family languages (ccomplete#Complete) which
calls searchdecl to find a declaration. This function is supposed to move the
cursor to the found declaration but it doesn't when called through the omni
completion mapping (CTRL-X CTRL-O). So, we restore the cursor position after
calling the omnifunc.
[READY] Fix unicode warning when jumping on Python 2
On Python 2, jumping in a file whose path contains non-ASCII characters raises the following warnings:
```
Error detected while processing function <SNR>26_CompleterCommand:
line 18:
python\ycm\vimsupport.py:400: UnicodeWarning: Unicode unequal comparison failed to convert both arguments to Unicode - interpreting them as being unequal
if filename != GetCurrentBufferFilepath():
python\ycm\vimsupport.py:375: UnicodeWarning: Unicode equal comparison failed to convert both arguments to Unicode - interpreting them as being unequal
if win.buffer.name == filepath:
```
This happens because, in the `JumpToLocation` function, we are comparing a unicode object (`filename` and `filepath`) with a Vim buffer name (`vim.current.buffer.name` returned by `GetCurrentBufferFilepath` and `win.buffer.name` where `win` is a Vim window) which is a byte object on Python 2.
For now, this PR adds tests covering the `JumpToLocation` function with unicode paths. They will raise the warnings on Python 2 and will fail because warnings are now treated as errors in tests. I'll update the PR with the fix once the builds are done.
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The 'hidden' option is a global option, not a buffer one. If this option is
false, we should check if the 'bufhidden' option, which is local to the buffer,
is set to 'hide'. If so, the buffer can be hidden despite the 'hidden' option
being false.
Bring fully asynchronous completion by polling for completions with a timer
then calling completefunc once the completions are ready. Use the start column
returned by the server in completefunc. Immediately display the last completion
on the TextChangedI event to prevent the popup menu disappearing while waiting
for the completions. Handle the TextChangedI event not being triggered while
the completion menu is open by closing the menu when inserting a character
through the InsertCharPre event, and when deleting a character on the <BS> and
<C-h> keys.
[READY] Use codepoint offsets in identifier functions
`CurrentIdentifierFinished` and `LastEnteredCharIsIdentifierChar` incorrectly use byte offsets with unicode lines (`CurrentColumn` returns a byte offset and `CurrentLineContents` a unicode string). This leads to weird bugs when there is a non-ASCII character on the current line:
This is fixed by converting byte offsets to codepoint ones through the `ByteOffsetToCodepointOffset` function.
This changes the behavior of these two functions when the current column position is invalid. Both functions returned false in that case. They now return as if the current column were at the end of the line. In practice, this doesn't really matter since the position of the current column should always be valid.
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CurrentIdentifierFinished and LastEnteredCharIsIdentifierChar incorrectly use
byte offsets with unicode lines. Convert those offsets to codepoint offsets.
[READY] Moved change tracking to python. Per buffer diagnostics
Thank you for working on YCM! :)
- [x] I have read and understood YCM's [CONTRIBUTING][cont] document.
- [x] I have read and understood YCM's [CODE_OF_CONDUCT][code] document.
- [x] I have included tests for the changes in my PR. If not, I have included a
rationale for why I haven't.
- [x] **I understand my PR may be closed if it becomes obvious I didn't
actually perform all of these steps.**
Adds an emulation of Vim buffer object and moves change tracking into python.
Now diagnostics are stored per buffer, which effectively solves #2165 .
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[READY] Fix diagnostic highlighting with invalid location extent
ycmd may return a location extent with a starting column of zero (see the test for an example) which is not a valid column (columns are 1-indexed). We should use the location in this case. Also, when the location extent is not valid, we should call `AddDiagnosticSyntaxMatch` with the `is_error` parameter to highlight warnings as such and not as errors (`is_error` is `True` by default).
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On non-Windows platforms, a ConnectionError exception is raised instead
of a ConnectTimeout one when the connection cannot be established (e.g.
the server crashed). Since the latter is a subclass of the former, we
only need to catch ConnectionError.
Sitecustomize files can be slow or broken and might hang editor
startup. Since they aren't necessary for checking the python version,
disable them to get a small speed boost for everyone, and an editor
that doesn't hang indefinitely on startup if the sitecustomize gets
into an infinite loop (due to a bad NFS mount or similar).
[READY] Fix exception when response future is not set
An `AttributeError` exception is raised when `Done` is called before `Start` in the `CompletionRequest` and `EventNotification` classes because the `_response_future` attribute is not yet defined.
Fixes#2461.
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[READY] Fix flake8 error
This fixes a new error detected by the last version of `pycodestyle` (2.2.0), which is a dependency of `flake8`:
```
C:\projects\youcompleteme\python\ycm\youcompleteme.py:69:1: E305 expected 2 blank lines after class or function definition, found 1
```
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[READY] Move client tests to the main tests folder
This makes it possible to configure all tests at a package level by implementing the `setUpPackage` and `tearDownPackage` functions in `python/ycm/tests/__init__.py` file.
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Implement ycm_quiet_messages options (See #2021)
# PR Prelude
- [x] I have read and understood YCM's [CONTRIBUTING][cont] document.
- [x] I have read and understood YCM's [CODE_OF_CONDUCT][code] document.
- [x] I have included tests for the changes in my PR. If not, I have included a
rationale for why I haven't.
- [x] **I understand my PR may be closed if it becomes obvious I didn't
actually perform all of these steps.**
# Why this change is necessary and useful
See issue #2021. This is a partial implementation based on the syntastic option referenced, supporting the `!` flag and filters of type `regex` and `level`. Also supports filetype specific filters using `ycm_<ft>_quiet_messages`, but I couldn't think of a great way to fall back to syntastic configs for this one.
In terms of usefulness: I've been playing with C# recently, which has a bunch of style warnings that I don't want to follow, and prefer to only have the gutter showing if there are actually errors, or warnings that I *do* want to follow.
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We eagerly compile all the filters up front, then gather the
compiled filters into a DiagnosticFilter lazily, caching the
result to avoid garbage lists.
