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    "cmd": [
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    "cmd": [
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    "cmd": [
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    "cmd": [
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          "update_token": "token"
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        "hostname": "rdbhost"
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    "name": "checkout.cache.alternates",
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      "@@@STEP_LOG_LINE@alternates@[CACHE]/git/fuchsia.googlesource.com-infra-salt/objects@@@",
      "@@@STEP_LOG_END@alternates@@@"
    ]
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    "cmd": [
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    "cmd": [
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      "@@@STEP_LOG_LINE@template.json@  \"builders\": [@@@",
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    "cmd": [],
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        "hostname": "rdbhost"
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      "@@@STEP_LOG_LINE@tool_manifest.json@  \"path\": \"path/to/gcloud\",@@@",
      "@@@STEP_LOG_LINE@tool_manifest.json@  \"version\": \"version:pinned-version\"@@@",
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      "@@@STEP_LOG_END@tool_manifest.json@@@"
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      "/path/to/tmp/json",
      "ensure-directory",
      "--mode",
      "0777",
      "[START_DIR]/cipd_tool/path/to/gcloud/version%3Apinned-version"
    ],
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      "@@@STEP_NEST_LEVEL@2@@@"
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    "cmd": [
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      "-ensure-file",
      "path/to/gcloud version:pinned-version",
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      "0",
      "-json-output",
      "/path/to/tmp/json"
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        "hostname": "rdbhost"
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    },
    "name": "ensure gcloud.install path/to/gcloud.ensure_installed",
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      "@@@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-version:pinned-v\", @@@",
      "@@@STEP_LOG_LINE@json.output@        \"package\": \"path/to/gcloud\"@@@",
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      "@@@STEP_LOG_LINE@json.output@    ]@@@",
      "@@@STEP_LOG_LINE@json.output@  }@@@",
      "@@@STEP_LOG_LINE@json.output@}@@@",
      "@@@STEP_LOG_END@json.output@@@"
    ]
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  {
    "cmd": [
      "python",
      "-u",
      "[START_DIR]/cipd_tool/path/to/gcloud/version%3Apinned-version/lib/gcloud.py",
      "compute",
      "images",
      "describe-from-family",
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      "--format=json"
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        "hostname": "rdbhost"
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    },
    "name": "get latest image for foo/bar",
    "~followup_annotations": [
      "@@@STEP_LOG_LINE@json.output@{}@@@",
      "@@@STEP_LOG_END@json.output@@@"
    ]
  },
  {
    "failure": {
      "failure": {},
      "humanReason": "Unable to find image for foo/bar"
    },
    "name": "$result"
  }
]