Use conda-forge when installing into conda envs (#17629)

Co-authored-by: Brett Cannon <brcan@microsoft.com>

Author: DonJayamanne

news/2 Fixes/17628.md

@@ -0,0 +1 @@
+Use `conda-forge` channel when installing packages into conda environments.

src/client/common/installer/condaInstaller.ts

@@ -7,9 +7,9 @@ import { ICondaService, ICondaLocatorService, IComponentAdapter } from '../../in
 import { IServiceContainer } from '../../ioc/types';
 import { ModuleInstallerType } from '../../pythonEnvironments/info';
 import { inDiscoveryExperiment } from '../experiments/helpers';
-import { ExecutionInfo, IConfigurationService, IExperimentService } from '../types';
+import { ExecutionInfo, IConfigurationService, IExperimentService, Product } from '../types';
 import { isResource } from '../utils/misc';
-import { ModuleInstaller } from './moduleInstaller';
+import { ModuleInstaller, translateProductToModule } from './moduleInstaller';
 import { InterpreterUri, ModuleInstallFlags } from './types';
 
 /**
@@ -84,9 +84,21 @@ export class CondaInstaller extends ModuleInstaller {
         const info = await condaLocatorService.getCondaEnvironment(pythonPath);
         const args = [flags & ModuleInstallFlags.upgrade ? 'update' : 'install'];
 
-        // Temporarily ensure tensorboard is installed from the conda-forge
-        // channel since 2.4.1 is not yet available in the default index
-        if (moduleName === 'tensorboard') {
+        // Found that using conda-forge is best at packages like tensorboard & ipykernel which seem to get updated first on conda-forge
+        // https://github.com/microsoft/vscode-jupyter/issues/7787 & https://github.com/microsoft/vscode-python/issues/17628
+        // Do this just for the datascience packages.
+        if (
+            [
+                Product.tensorboard,
+                Product.ipykernel,
+                Product.pandas,
+                Product.nbconvert,
+                Product.jupyter,
+                Product.notebook,
+            ]
+                .map(translateProductToModule)
+                .includes(moduleName)
+        ) {
             args.push('-c', 'conda-forge');
         }
         if (info && info.name) {

src/test/common/installer/moduleInstaller.unit.test.ts

@@ -621,7 +621,16 @@ suite('Module Installer', () => {
                                     test(`Test args (${product.name})`, async () => {
                                         setActiveInterpreter();
                                         const expectedArgs = [isUpgrade ? 'update' : 'install'];
-                                        if (product.name === 'tensorboard') {
+                                        if (
+                                            [
+                                                'pandas',
+                                                'tensorboard',
+                                                'ipykernel',
+                                                'jupyter',
+                                                'notebook',
+                                                'nbconvert',
+                                            ].includes(product.name)
+                                        ) {
                                             expectedArgs.push('-c', 'conda-forge');
                                         }
                                         if (condaEnvInfo && condaEnvInfo.name) {