feat: add rust-analyzer.install command

to install rust-analyzer from GitHub release

README.md

@@ -190,6 +190,7 @@ You can use these commands by `:CocCommand XYZ`.
 | rust-analyzer.ssr | Structural Search Replace |
 | rust-analyzer.syntaxTree | Show syntax tree |
 | rust-analyzer.testCurrent | Test Current |
+| rust-analyzer.install | Install latest `rust-analyzer` from [GitHub release](https://github.com/rust-lang/rust-analyzer/releases) |
 | rust-analyzer.upgrade | Download latest `rust-analyzer` from [GitHub release](https://github.com/rust-lang/rust-analyzer/releases) |
 | rust-analyzer.viewHir | View Hir |
 | rust-analyzer.viewMir | View Mir |

package.json

@@ -1438,6 +1438,11 @@
         "title": "Test Current",
         "category": "rust-analyzer"
       },
+      {
+        "command": "rust-analyzer.install",
+        "title": "Install Rust Analyzer from GitHub release",
+        "category": "rust-analyzer"
+      },
       {
         "command": "rust-analyzer.upgrade",
         "title": "Upgrade Rust Analyzer from GitHub release",

src/commands.ts

@@ -564,6 +564,12 @@ export function showReferences(): Cmd {
   };
 }
 
+export function install(ctx: Ctx): Cmd {
+  return async () => {
+    await ctx.installServerFromGitHub();
+  };
+}
+
 export function upgrade(ctx: Ctx) {
   return async () => {
     await ctx.checkUpdate(false);

src/ctx.ts

@@ -4,7 +4,7 @@ import { join } from 'path';
 import which from 'which';
 import { createClient } from './client';
 import { Config } from './config';
-import { downloadServer, getLatestRelease } from './downloader';
+import { downloadServer, getLatestRelease, ReleaseTag } from './downloader';
 import * as ra from './lsp_ext';
 
 export type RustDocument = TextDocument & { languageId: 'rust' };
@@ -104,6 +104,33 @@ export class Ctx {
     return;
   }
 
+  async installServerFromGitHub() {
+    const latest = await getLatestRelease(this.config.channel);
+    if (!latest) {
+      return;
+    }
+    try {
+      if (process.platform === 'win32') {
+        await this.client.stop();
+      }
+
+      await downloadServer(this.extCtx, latest);
+    } catch (e) {
+      console.error(e);
+      let msg = 'Install rust-analyzer failed, please try again';
+      // @ts-ignore
+      if (e.code === 'EBUSY' || e.code === 'ETXTBSY' || e.code === 'EPERM') {
+        msg = 'Install rust-analyzer failed, other Vim instances might be using it, you should close them and try again';
+      }
+      window.showInformationMessage(msg, 'error');
+      return;
+    }
+    await this.client.stop();
+    this.client.start();
+
+    this.extCtx.globalState.update('release', latest.tag);
+  }
+
   async checkUpdate(auto = true) {
     if (this.config.serverPath || this.usingSystemServer) {
       // no update checking if using custom or system server

src/index.ts

@@ -50,6 +50,7 @@ export async function activate(context: ExtensionContext): Promise<void> {
   ctx.registerCommand('ssr', cmds.ssr);
   ctx.registerCommand('debug', cmds.debug);
   ctx.registerCommand('reload', cmds.reload);
+  ctx.registerCommand('install', cmds.install);
   ctx.registerCommand('upgrade', cmds.upgrade);
   ctx.registerCommand('viewHir', cmds.viewHir);
   ctx.registerCommand('viewMir', cmds.viewMir);