Code action Create module crashes helix if the folder for the module to be created does not exist

[korken89]

When running the code action Create module, helix crashes if the module file wants to be created in a folder that does not exist.

Reproduction steps

# Start a Rust project.
cargo new --lib bug

src/lib.rs contents:

mod error;

src/error.rs contents:

mod running_create_module_code_action_on_me_will_crash_helix;

Run the code action Create module on the module above. When it sees that the error folder does not exist (it wants to create src/error/running_create_module_code_action_on_me_will_crash_helix.rs) helix will crash with:

thread 'main' panicked at 'called 'Result::unwrap()' on an 'Err' value: Os { code: 2, kind: NotFound, message: "No such file or directory" }', helix-term/src/commands/lsp.rs:408:60
note: run with 'RUST_BACKTRACE=1' environment variable to display a backtrace

Expected outcome

helix should first create the folder, and then the file.

Environment

• Platform: Linux
• Terminal emulator: Alacritty
• Helix version: v0.5.0-833-gf1e90ac2

~/.cache/helix/helix.log

2022-03-08T16:13:05.245 helix_lsp::transport [ERROR] err <- "[ERROR rust_analyzer::reload] failed to switch build data: rust-analyzer failed to run build scripts:\n"
2022-03-08T16:13:05.245 helix_lsp::transport [ERROR] err <- "error: could not compile `device-driver` due to 2 previous errors; 1 warning emitted\n"
2022-03-08T16:13:05.245 helix_lsp::transport [ERROR] err <- "\n"
2022-03-08T16:13:05.245 helix_lsp::transport [ERROR] err <- "\n"
2022-03-08T16:13:06.289 helix_lsp::transport [ERROR] err <- "[ERROR rust_analyzer::reload] failed to switch build data: rust-analyzer failed to run build scripts:\n"
2022-03-08T16:13:06.289 helix_lsp::transport [ERROR] err <- "error: could not compile `device-driver` due to 2 previous errors; 1 warning emitted\n"
2022-03-08T16:13:06.289 helix_lsp::transport [ERROR] err <- "\n"
2022-03-08T16:13:06.289 helix_lsp::transport [ERROR] err <- "\n"