describe native and emulated

Co-authored-by: ytausch <[email protected]>

conda_smithy/data/conda-forge.json

@@ -1856,7 +1856,7 @@
           "type": "null"
         }
       ],
-      "description": "The `provider` field is a mapping from build platform (not target platform)\nto CI service. It determines which service handles each build platform.\nIf a desired build platform is not available with a selected provider\n(either natively or with emulation), the build will be disabled.\nUse the `build_platform` field to manually specify cross-compilation when\nno providers offer a desired build platform.\n\nThe following are available as supported build platforms:\n\n* `linux_64`\n* `osx_64`\n* `win_64`\n* `linux_aarch64`\n* `linux_ppc64le`\n* `linux_s390x`\n* `linux_armv7l`\n\nThe following CI services are available:\n\n* `azure`\n* `circle`\n* `travis`\n* `appveyor`\n* `None` or `False` to disable a build platform.\n* `default` to choose an appropriate CI (only if available)\n\nFor example, switching linux_64 & osx_64 to build on Travis CI, with win_64 on\nAppveyor:\n\n```yaml\nprovider:\n    linux_64: travis\n    osx_64: travis\n    win_64: appveyor\n```\n\nCurrently, x86_64 platforms are enabled, but other build platforms are\ndisabled by default. i.e. an empty provider entry is equivalent to the\nfollowing:\n\n```yaml\nprovider:\n    linux_64: azure\n    osx_64: azure\n    win_64: azure\n    linux_ppc64le: None\n    linux_aarch64: None\n```\n\nTo enable `linux_ppc64le` and `linux_aarch64` add the following:\n\n```yaml\nprovider:\n    linux_ppc64le: default\n    linux_aarch64: default\n```"
+      "description": "The `provider` field is a mapping from build platform (not target platform)\nto CI service. It determines which service handles each build platform.\nIf a desired build platform is not available with a selected provider\n(either natively or with emulation), the build will be disabled.\nUse the `build_platform` field to manually specify cross-compilation when\nno providers offer a desired build platform.\n\nThe following are available as supported build platforms:\n\n* `linux_64`\n* `osx_64`\n* `win_64`\n* `linux_aarch64`\n* `linux_ppc64le`\n* `linux_s390x`\n* `linux_armv7l`\n\nThe following CI services are available:\n\n* `azure`\n* `circle`\n* `travis`\n* `appveyor`\n* `None` or `False` to disable a build platform.\n* `default` to choose an appropriate CI (only if available)\n* `native` to choose an appropriate CI for native compiling (only if available)\n* `emulated` to choose an appropriate CI for compiling inside an emulation \n  of the target platform (only if available)\n\nFor example, switching linux_64 & osx_64 to build on Travis CI, with win_64 on\nAppveyor:\n\n```yaml\nprovider:\n    linux_64: travis\n    osx_64: travis\n    win_64: appveyor\n```\n\nCurrently, x86_64 platforms are enabled, but other build platforms are\ndisabled by default. i.e. an empty provider entry is equivalent to the\nfollowing:\n\n```yaml\nprovider:\n    linux_64: azure\n    osx_64: azure\n    win_64: azure\n    linux_ppc64le: None\n    linux_aarch64: None\n```\n\nTo enable `linux_ppc64le` and `linux_aarch64` add the following:\n\n```yaml\nprovider:\n    linux_ppc64le: default\n    linux_aarch64: default\n```"
     },
     "package": {
       "anyOf": [

conda_smithy/schema.py

@@ -777,6 +777,9 @@ class ConfigModel(BaseModel):
         * `appveyor`
         * `None` or `False` to disable a build platform.
         * `default` to choose an appropriate CI (only if available)
+        * `native` to choose an appropriate CI for native compiling (only if available)
+        * `emulated` to choose an appropriate CI for compiling inside an emulation 
+          of the target platform (only if available)
 
         For example, switching linux_64 & osx_64 to build on Travis CI, with win_64 on
         Appveyor: