Update pypi install command to work with external dependencies

app/assets/javascripts/packages/details/store/getters.js

@@ -98,7 +98,7 @@ export const nugetSetupCommand = ({ nugetPath }) =>
 
 export const pypiPipCommand = ({ pypiPath, packageEntity }) =>
   // eslint-disable-next-line @gitlab/require-i18n-strings
-  `pip install ${packageEntity.name} --index-url ${pypiPath}`;
+  `pip install ${packageEntity.name} --extra-index-url ${pypiPath}`;
 
 export const pypiSetupCommand = ({ pypiSetupPath }) => `[gitlab]
 repository = ${pypiSetupPath}

changelogs/unreleased/42916-pypi-install-command.yml

+---
+title: Update pypi install command to work with external dependencies
+merge_request: 42916
+author:
+type: changed

doc/user/packages/pypi_repository/index.md

@@ -274,7 +274,7 @@ Where:
 Install the latest version of a package using the following command:
 
 ```shell
-pip install --index-url https://__token__:<personal_access_token>@gitlab.com/api/v4/projects/<project_id>/packages/pypi/simple --no-deps <package_name>
+pip install --extra-index-url https://__token__:<personal_access_token>@gitlab.com/api/v4/projects/<project_id>/packages/pypi/simple --no-deps <package_name>
 ```
 
 Where:
@@ -287,7 +287,7 @@ If you were following the guide above and want to test installing the
 `MyPyPiPackage` package, you can run the following:
 
 ```shell
-pip install mypypipackage --no-deps --index-url https://__token__:<personal_access_token>@gitlab.com/api/v4/projects/<your_project_id>/packages/pypi/simple
+pip install mypypipackage --no-deps --extra-index-url https://__token__:<personal_access_token>@gitlab.com/api/v4/projects/<your_project_id>/packages/pypi/simple
 ```
 
 This should result in the following:

spec/frontend/packages/details/store/getters_spec.js

@@ -69,7 +69,7 @@ describe('Getters PackageDetails Store', () => {
   const nugetInstallationCommandStr = `nuget install ${nugetPackage.name} -Source "GitLab"`;
   const nugetSetupCommandStr = `nuget source Add -Name "GitLab" -Source "${registryUrl}" -UserName <your_username> -Password <your_token>`;
 
-  const pypiPipCommandStr = `pip install ${pypiPackage.name} --index-url ${registryUrl}`;
+  const pypiPipCommandStr = `pip install ${pypiPackage.name} --extra-index-url ${registryUrl}`;
   const composerRegistryIncludeStr = '{"type":"composer","url":"foo"}';
   const composerPackageIncludeStr = JSON.stringify({
     [packageWithoutBuildInfo.name]: packageWithoutBuildInfo.version,