| [ | 
 |   { | 
 |     "cmd": [ | 
 |       "cipd", | 
 |       "ensure", | 
 |       "-root", | 
 |       "[CACHE]/macos_sdk", | 
 |       "-ensure-file", | 
 |       "infra/tools/mac_toolchain/${platform} git_revision:434f5462a77e7103f9d610fa5cabc426bb21502e", | 
 |       "-json-output", | 
 |       "/path/to/tmp/json" | 
 |     ], | 
 |     "infra_step": true, | 
 |     "name": "ensure_installed", | 
 |     "~followup_annotations": [ | 
 |       "@@@STEP_LOG_LINE@json.output@{@@@", | 
 |       "@@@STEP_LOG_LINE@json.output@  \"result\": {@@@", | 
 |       "@@@STEP_LOG_LINE@json.output@    \"\": [@@@", | 
 |       "@@@STEP_LOG_LINE@json.output@      {@@@", | 
 |       "@@@STEP_LOG_LINE@json.output@        \"instance_id\": \"resolved-instance_id-of-git_revision:434\", @@@", | 
 |       "@@@STEP_LOG_LINE@json.output@        \"package\": \"infra/tools/mac_toolchain/resolved-platform\"@@@", | 
 |       "@@@STEP_LOG_LINE@json.output@      }@@@", | 
 |       "@@@STEP_LOG_LINE@json.output@    ]@@@", | 
 |       "@@@STEP_LOG_LINE@json.output@  }@@@", | 
 |       "@@@STEP_LOG_LINE@json.output@}@@@", | 
 |       "@@@STEP_LOG_END@json.output@@@" | 
 |     ] | 
 |   }, | 
 |   { | 
 |     "cmd": [ | 
 |       "[CACHE]/macos_sdk/mac_toolchain", | 
 |       "install", | 
 |       "-kind", | 
 |       "mac", | 
 |       "-xcode-version", | 
 |       "10b61", | 
 |       "-output-dir", | 
 |       "[CACHE]/macos_sdk/XCode.app" | 
 |     ], | 
 |     "infra_step": true, | 
 |     "name": "install xcode" | 
 |   }, | 
 |   { | 
 |     "cmd": [ | 
 |       "sudo", | 
 |       "xcode-select", | 
 |       "--switch", | 
 |       "[CACHE]/macos_sdk/XCode.app" | 
 |     ], | 
 |     "infra_step": true, | 
 |     "name": "select XCode" | 
 |   }, | 
 |   { | 
 |     "cmd": [ | 
 |       "gn", | 
 |       "gen", | 
 |       "out/Release" | 
 |     ], | 
 |     "name": "gn" | 
 |   }, | 
 |   { | 
 |     "cmd": [ | 
 |       "ninja", | 
 |       "-C", | 
 |       "out/Release" | 
 |     ], | 
 |     "name": "ninja" | 
 |   }, | 
 |   { | 
 |     "cmd": [ | 
 |       "sudo", | 
 |       "xcode-select", | 
 |       "--reset" | 
 |     ], | 
 |     "infra_step": true, | 
 |     "name": "reset XCode" | 
 |   }, | 
 |   { | 
 |     "jsonResult": null, | 
 |     "name": "$result" | 
 |   } | 
 | ] |