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The general style for errors, warnings and info messages is to start
with a capitalized letter and end without a period. The main exception
is when dealing with nouns that are clearer with special case handling,
e.g. "macOS failed to work" or "ioctl is borked".
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This resolves a lot of NLL issues, however full NLL will be necessary to
handle a couple of remaining issues.
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To make sure that all error and information reporting to the user is
unified, all instances of `print!`, `eprint!`, `println!` and
`eprintln!` have been removed and replaced by logging.
When `RUST_LOG` is not specified, the default Alacritty logger now also
prints to both the stderr and a log file. The log file is only created
when a message is written to it and its name is printed to stdout the
first time it is used.
Whenever a warning or an error has been written to the log file/stderr,
a message is now displayed in Alacritty which points to the log file
where the full error is documented.
The message is cleared whenever the screen is cleared using either the
`clear` command or the `Ctrl+L` key binding.
To make sure that log files created by root don't prevent normal users
from interacting with them, the Alacritty log file is `/tmp/Alacritty-$PID.log`.
Since it's still possible that the log file can't be created, the UI
error/warning message now informs the user if the message was only
written to stderr. The reason why it couldn't be created is then printed
to stderr.
To make sure the deletion of the log file at runtime doesn't create any
issues, the file is re-created if a write is attempted without the file
being present.
To help with debugging Alacritty issues, a timestamp and the error
level are printed in all log messages.
All log messages now follow this format:
[YYYY-MM-DD HH:MM] [LEVEL] Message
Since it's not unusual to spawn a lot of different terminal emulators
without restarting, Alacritty can create a ton of different log files.
To combat this problem, logfiles are removed by default after
Alacritty has been closed. If the user wants to persist the log of a
single session, the `--persistent_logging` option can be used. For
persisting all log files, the `persistent_logging` option can be set in
the configuration file
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There were some unneeded codeblocks and TODO/XXX comments in the code
that have been removed. All issues marked with TODO/XXX have either been
already resolved or tracking issues exist.
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Now, only cells that have been used are cleared. This is achieved by
using a "occupied" memo on the Row itself. The value, `occ`, is updated
wherever the Row is accessed mutably, and it's cleared to zero in
Row::reset.
The tests for grid scroll_up and scroll_down were updated to include a
test on the value `occ` and slightly refactored, but are otherwise
equivalent to the previous implementation of those tests.
Because of the change to the `Row` struct, the ref tests were updated so
Deserialization keeps working as expected.
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BCE was broken in attempt to optimize row clearing. The fix is to revert
to passing in the current cursor state when clearing.
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Some tests are still not passing, though.
A migration script was added to migrate serialized grids from
pre-scrollback to the current format. The script is included with this
commit for completeness, posterity, and as an example to be used in the
future.
A few tests in grid/tests.rs were removed due to becoming irrelevant.
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This is part of some cleanup for the grid module as a whole.
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