Initial implementation of join order metric scanning

Author: Dave Bartolomeo

extensions/ql-vscode/package-lock.json

@@ -746,11 +746,6 @@
           "group": "9_qlCommands",
           "when": "codeql.supportsEvalLog && viewItem == rawResultsItem || codeql.supportsEvalLog && viewItem == interpretedResultsItem || codeql.supportsEvalLog && viewItem == cancelledResultsItem"
         },
-        {
-          "command": "codeQLQueryHistory.scanEvalLog",
-          "group": "9_qlCommands",
-          "when": "codeql.supportsEvalLog && (viewItem == rawResultsItem || viewItem == interpretedResultsItem || viewItem == cancelledResultsItem)"
-        },
         {
           "command": "codeQLQueryHistory.showQueryText",
           "group": "9_qlCommands",

extensions/ql-vscode/package.json

@@ -685,6 +685,23 @@ export class CodeQLCliServer implements Disposable {
     return await this.runCodeQlCliCommand(['generate', 'log-summary'], subcommandArgs, 'Generating log summary');
   }
 
+  /**
+  * Generate a JSON summary of an evaluation log.
+  * @param inputPath The path of an evaluation event log.
+  * @param outputPath The path to write a JSON summary of it to.
+  */
+   async generateJsonLogSummary(
+    inputPath: string,
+    outputPath: string
+  ): Promise<string> {
+    const subcommandArgs = [
+      '--minify-output',
+      inputPath,
+      outputPath
+    ];
+    return await this.runCodeQlCliCommand(['generate', 'log-summary'], subcommandArgs, 'Generating log summary');
+  }
+
   /**
   * Gets the results from a bqrs.
   * @param bqrsPath The path to the bqrs.

extensions/ql-vscode/src/cli.ts

@@ -97,6 +97,7 @@ import { URLSearchParams } from 'url';
 import { handleDownloadPacks, handleInstallPackDependencies } from './packaging';
 import { RemoteQueryHistoryItem } from './remote-queries/remote-query-history-item';
 import { HistoryItemLabelProvider } from './history-item-label-provider';
+import { JoinOrderScannerProvider } from './log-insights/join-order';
 
 /**
  * extension.ts
@@ -470,6 +471,9 @@ async function activateWithInstalledDistribution(
 
   ctx.subscriptions.push(qhm);
 
+  void logger.log('Initializing evaluation log scanners.');
+  ctx.subscriptions.push(qhm.registerLogScannerProvider(new JoinOrderScannerProvider()));
+
   void logger.log('Initializing results panel interface.');
   const intm = new InterfaceManager(ctx, dbm, cliServer, queryServerLogger, labelProvider);
   ctx.subscriptions.push(intm);
@@ -504,6 +508,8 @@ async function activateWithInstalledDistribution(
     forceReveal: WebviewReveal
   ): Promise<void> {
     await intm.showResults(query, forceReveal, false);
+    // Always update the log warnings so they stay in sync with the results.
+    await qhm.scanEvalLog(query);
   }
 
   async function compileAndRunQuery(