Patch file to update Sitecore Index names to allow developers to share an Azure Search Service. Simply set the environment variable and drop this file in the "Include/zzz" folder

Sitecore.AzureDev.IndexDefinitions.config

<configuration xmlns:patch="http://www.sitecore.net/xmlconfig/" xmlns:set="http://www.sitecore.net/xmlconfig/set/">
  <sitecore>
  <sc.variable name="environment" value="martin_dev_" />
    <contentSearch>
      <configuration>
        <indexes>
          <index id="sitecore_master_index" type="Sitecore.ContentSearch.Azure.CloudSearchProviderIndex, Sitecore.ContentSearch.Azure">
            <param desc="name" patch:instead="param[@desc='name']">$(environment)$(id)</param>
          </index>
          <index id="sitecore_web_index" type="Sitecore.ContentSearch.Azure.CloudSearchProviderIndex, Sitecore.ContentSearch.Azure">
            <param desc="name" patch:instead="param[@desc='name']">$(environment)$(id)</param>
          </index>
          <index id="sitecore_core_index" type="Sitecore.ContentSearch.Azure.CloudSearchProviderIndex, Sitecore.ContentSearch.Azure">
            <param desc="name" patch:instead="param[@desc='name']">$(environment)$(id)</param>
          </index>
          <index id="sitecore_suggested_test_index" type="Sitecore.ContentSearch.Azure.CloudSearchProviderIndex, Sitecore.ContentSearch.Azure">
            <param desc="name" patch:instead="param[@desc='name']">$(environment)$(id)</param>
          </index>
          <index id="sitecore_marketing_asset_index_master" type="Sitecore.ContentSearch.Azure.CloudSearchProviderIndex, Sitecore.ContentSearch.Azure">
            <param desc="name" patch:instead="param[@desc='name']">$(environment)$(id)</param>
          </index>
          <index id="sitecore_marketing_asset_index_web" type="Sitecore.ContentSearch.Azure.CloudSearchProviderIndex, Sitecore.ContentSearch.Azure">
            <param desc="name" patch:instead="param[@desc='name']">$(environment)$(id)</param>
          </index>
          <index id="sitecore_testing_index" type="Sitecore.ContentSearch.Azure.CloudSearchProviderIndex, Sitecore.ContentSearch.Azure">
            <param desc="name" patch:instead="param[@desc='name']">$(environment)$(id)</param>
          </index>
          <index id="sitecore_fxm_master_index" type="Sitecore.ContentSearch.Azure.CloudSearchProviderIndex, Sitecore.ContentSearch.Azure">
            <param desc="name" patch:instead="param[@desc='name']">$(environment)$(id)</param>
          </index>
          <index id="sitecore_fxm_web_index" type="Sitecore.ContentSearch.Azure.CloudSearchProviderIndex, Sitecore.ContentSearch.Azure">
            <param desc="name" patch:instead="param[@desc='name']">$(environment)$(id)</param>
          </index>
        </indexes>
      </configuration>
    </contentSearch>
  </sitecore>
</configuration>

Note: There is a platform dependency on the "sitecore_marketingdefinitions_master" and "sitecore_marketingdefinitions_web" naming so those 2 indexes are excluded from the patch. In a development environment, we can live with sharing these indexes.