When piping the output of `setup.py` to another program, that program cannot usually deal with escape sequences well. To fix this, output the compilation progress on new lines instead of overwriting the current line.
Disabling Link Time Optimization is useful for Nix on Darwin because LTO is broken there and has been for a long time, see https://github.com/NixOS/nixpkgs/pull/19312.
This is currently worked around in the Nix package with a patch that removes the lines that add -flto to the compiler flags.
The current notifications framework has been deprecated in Big Sur. The new
framework only allows notifications from signed and notarized applications,
so people using kitty from HomeBrew/source are out of luck. And
notifications can only be displayed once the user grants permission. A
completely brain-dead design. Complain to Apple.
This required the kitty package to be moved from Frameworks to
Resources, because Apple cant codesign .pyc files and its notarization
requires everything in Frameworks to be signed. Hopefully that does not
break anything. Also removed the kitty-deref-symlink since it is not
needed anyway and was only present for backwards compatibility.
Fixes#2040
png2icns is used when building kitty with nix because iconutil seems to be closed-source.
libicns also has an iconutil clone called icnsutil in the source tree but the last release is from 2012, which does not include this utility yet.
According to the text just above https://docs.python.org/3/library/exceptions.html#EnvironmentError, `EnvironmentError` has been an alias of `OSError` since Python 3.3. Replacing it makes the code more consistent since `OSError` is used in other places in the code too.
When a linker process fails, `failed` will be set to a value other than `None`. When a second linker process fails, the `else` case will be taken because `failed is None`, which executes `compile_cmd.on_success()`. This function tries to rename or move the file generated by the linker but since the linker process failed, the file will most likely not exist. This will throw an error, which will prevent printing the actual error message from the linker.
