move Rust sources to top level, C sources into c_src

This moves the Rust sources out of rust_src/ and into the top level.
Running the bcachefs executable out of the development tree is now:

$ ./target/release/bcachefs command
or
$ cargo run --profile release -- command

instead of "./bcachefs command".

Building and installing is still:

$ make && make install

Signed-off-by: Thomas Bertschinger <tahbertschinger@gmail.com>
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>

1 files changed, 0 insertions, 19 deletions

diff --git a/rust-src/src/commands/cmd_completions.rs b/rust-src/src/commands/cmd_completions.rs
deleted file mode 100644
index 53cdd643..00000000
--- a/rust-src/src/commands/cmd_completions.rs
+++ /dev/null
@@ -1,19 +0,0 @@
-use clap::{Command, CommandFactory, Parser};
-use clap_complete::{generate, Generator, Shell};
-use std::io;
-
-/// Generate shell completions
-#[derive(clap::Parser, Debug)]
-pub struct Cli {
-    shell: Shell,
-}
-
-fn print_completions<G: Generator>(gen: G, cmd: &mut Command) {
-    generate(gen, cmd, cmd.get_name().to_string(), &mut io::stdout());
-}
-
-pub fn cmd_completions(argv: Vec<String>) -> i32 {
-    let cli = Cli::parse_from(argv);
-    print_completions(cli.shell, &mut super::Cli::command());
-    0
-}