Added command to rename current document, with lsp support

book/src/generated/typable-cmd.md

@@ -78,4 +78,5 @@
 | `:pipe-to` | Pipe each selection to the shell command, ignoring output. |
 | `:run-shell-command`, `:sh` | Run a shell command |
 | `:reset-diff-change`, `:diffget`, `:diffg` | Reset the diff change at the cursor position. |
+| `:rename`, `:rnm` | Rename the currently selected buffer |
 | `:clear-register` | Clear given register. If no argument is provided, clear all registers. |

helix-lsp/src/client.rs

@@ -442,6 +442,11 @@ impl Client {
                     execute_command: Some(lsp::DynamicRegistrationClientCapabilities {
                         dynamic_registration: Some(false),
                     }),
+                    file_operations: Some(lsp::WorkspaceFileOperationsClientCapabilities {
+                        will_rename: Some(true),
+                        did_rename: Some(true),
+                        ..Default::default()
+                    }),
                     inlay_hint: Some(lsp::InlayHintWorkspaceClientCapabilities {
                         refresh_support: Some(false),
                     }),
@@ -592,6 +597,25 @@ impl Client {
         )
     }
 
+    pub fn will_rename_files(
+        &self,
+        params: &Vec<lsp::FileRename>,
+    ) -> impl Future<Output = Result<lsp::WorkspaceEdit>> {
+        let files = params.to_owned();
+        let request = self.call::<lsp::request::WillRenameFiles>(lsp::RenameFilesParams { files });
+
+        async move {
+            let json = request.await?;
+            let response: Option<lsp::WorkspaceEdit> = serde_json::from_value(json)?;
+            Ok(response.unwrap_or_default())
+        }
+    }
+
+    pub fn did_rename_files(&self, params: &[lsp::FileRename]) -> impl Future<Output = Result<()>> {
+        let files = params.to_owned();
+        self.notify::<lsp::notification::DidRenameFiles>(lsp::RenameFilesParams { files })
+    }
+
     pub fn did_change_workspace(
         &self,
         added: Vec<WorkspaceFolder>,

helix-term/src/commands/typed.rs

@@ -1,3 +1,4 @@
+use std::ffi::OsStr;
 use std::fmt::Write;
 use std::ops::Deref;
 
@@ -6,6 +7,7 @@ use crate::job::Job;
 use super::*;
 
 use helix_core::{encoding, shellwords::Shellwords};
+use helix_lsp::{lsp, Url};
 use helix_view::document::DEFAULT_LANGUAGE_NAME;
 use helix_view::editor::{Action, CloseError, ConfigEvent};
 use serde_json::Value;
@@ -2167,6 +2169,64 @@ fn reset_diff_change(
     Ok(())
 }
 
+fn rename_buffer(
+    cx: &mut compositor::Context,
+    args: &[Cow<str>],
+    event: PromptEvent,
+) -> anyhow::Result<()> {
+    if event != PromptEvent::Validate {
+        return Ok(());
+    }
+    ensure!(args.len() == 1, ":rename takes one argument");
+    let new_name = args.first().unwrap();
+
+    let (_, doc) = current!(cx.editor);
+    let path = doc
+        .relative_path()
+        .ok_or_else(|| anyhow!("Buffer not saved, use :write"))?
+        .canonicalize()
+        .map_err(|_| anyhow!("Could not get absolute path of the document"))?;
+    let mut path_new = path.clone();
+    path_new.set_file_name(OsStr::new(new_name.as_ref()));
+    if path_new.exists() {
+        bail!("This file already exists");
+    }
+
+    if let Err(e) = std::fs::rename(&path, &path_new) {
+        bail!("Could not rename file, error: {}", e);
+    }
+    let (_, doc) = current!(cx.editor);
+    doc.set_path(Some(path_new.as_path()))
+        .map_err(|_| anyhow!("File renamed, but could not set path of the document"))?;
+
+    if let Some(lsp_client) = doc.language_server() {
+        if let Ok(old_uri_str) = Url::from_file_path(&path) {
+            let old_uri = old_uri_str.to_string();
+            if let Ok(new_uri_str) = Url::from_file_path(&path_new) {
+                let new_uri = new_uri_str.to_string();
+                let files = vec![lsp::FileRename { old_uri, new_uri }];
+                match helix_lsp::block_on(lsp_client.will_rename_files(&files)) {
+                    Ok(edit) => {
+                        if apply_workspace_edit(cx.editor, helix_lsp::OffsetEncoding::Utf8, &edit)
+                            .is_err()
+                        {
+                            log::error!(":rename command failed to apply edits")
+                        }
+                    }
+                    Err(err) => log::error!("Language server error: {}", err),
+                }
+            } else {
+                log::error!(":rename command could not get new path uri")
+            }
+        } else {
+            log::error!(":rename command could not get current path uri")
+        }
+    }
+    cx.editor
+        .set_status(format!("Renamed file to {}", new_name));
+    Ok(())
+}
+
 fn clear_register(
     cx: &mut compositor::Context,
     args: &[Cow<str>],
@@ -2752,6 +2812,13 @@ pub const TYPABLE_COMMAND_LIST: &[TypableCommand] = &[
             fun: reset_diff_change,
             signature: CommandSignature::none(),
         },
+        TypableCommand {
+            name: "rename",
+            aliases: &["rnm"],
+            doc: "Rename the currently selected buffer",
+            fun: rename_buffer,
+            signature: CommandSignature::none(),
+        },
         TypableCommand {
             name: "clear-register",
             aliases: &[],