2f6b290084
This PR fix the "invalid cross-device link" error occurred in linux when trying to write the settings file atomically, like when click the "Enable vim mode" checkbox at first start. ```plain [2024-02-26T22:59:25+08:00 ERROR util] .../zed/crates/settings/src/settings_file.rs:135: Failed to write settings to file "/home/$USER/.config/zed/settings.json" Caused by: 0: failed to persist temporary file: Invalid cross-device link (os error 18) 1: Invalid cross-device link (os error 18) ``` Currently the `fs::RealFs::atomic_write()` method write to a temp file created with `NamedTempFile::new()` and then call `persist()` method to write to the config file path, which actually do a `rename` syscall under the hood. As the [issue](https://github.com/Stebalien/tempfile/issues/245) said > `NamedTempFile::new()` will create a temporary file in your system's temporary file directory. You need `NamedTempFile::new_in()`. The temporary file directory in linux is in `/tmp`, which is mounted to `tmpfs` filesystem, and in most case(all case I guess) `$HOME/.config/zed` is mounted to a different filesystem. And the `rename` syscall between different filesystems will return a `EXDEV` errno, as described in the man page [rename(2)](https://man7.org/linux/man-pages/man2/renameat2.2.html): ```plain EXDEV oldpath and newpath are not on the same mounted filesystem. (Linux permits a filesystem to be mounted at multiple points, but rename() does not work across different mount points, even if the same filesystem is mounted on both.) ``` And as the issue above said, use a different temp dir with `NamedTempFile::new_in()` for linux platform might be a solution, since the `rename` syscall provides atomicity. Release Notes: - Fix `settings.json` save failed with invalid cross-device link error in linux |
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