[
  {
    "cmd": [
      "vpython3",
      "-u",
      "RECIPE_MODULE[recipe_engine::file]/resources/fileutil.py",
      "--json-output",
      "/path/to/tmp/json",
      "copy",
      "[START_DIR]/checkout/.gitmodules",
      "/path/to/tmp/"
    ],
    "infra_step": true,
    "name": "read .gitmodules",
    "~followup_annotations": [
      "@@@STEP_LOG_LINE@.gitmodules@[submodule \"b2\"]@@@",
      "@@@STEP_LOG_LINE@.gitmodules@\tpath = b2@@@",
      "@@@STEP_LOG_LINE@.gitmodules@\turl = https://foo.googlesource.com/b2@@@",
      "@@@STEP_LOG_LINE@.gitmodules@\tbranch = branch@@@",
      "@@@STEP_LOG_END@.gitmodules@@@"
    ]
  },
  {
    "cmd": [],
    "name": "b2",
    "~followup_annotations": [
      "@@@STEP_SUMMARY_TEXT@no roll required@@@"
    ]
  },
  {
    "cmd": [
      "git",
      "ls-remote",
      "--heads",
      "https://foo.googlesource.com/b2",
      "branch"
    ],
    "name": "b2.git ls-remote",
    "timeout": 600.0,
    "~followup_annotations": [
      "@@@STEP_NEST_LEVEL@1@@@",
      "@@@STEP_LOG_LINE@stdout@h3ll0\trefs/heads/branch@@@",
      "@@@STEP_LOG_END@stdout@@@"
    ]
  },
  {
    "cmd": [
      "git",
      "submodule",
      "update",
      "--init",
      "--jobs",
      "4",
      "[START_DIR]/checkout/b2"
    ],
    "cwd": "[START_DIR]/checkout",
    "name": "b2.git submodule update",
    "~followup_annotations": [
      "@@@STEP_NEST_LEVEL@1@@@"
    ]
  },
  {
    "cmd": [
      "git",
      "log",
      "--max-count=1",
      "--pretty=format:%H"
    ],
    "cwd": "[START_DIR]/checkout/b2",
    "name": "b2.get old revision",
    "timeout": 600.0,
    "~followup_annotations": [
      "@@@STEP_NEST_LEVEL@1@@@",
      "@@@STEP_SUMMARY_TEXT@1111111111111111111111111111111111111111@@@"
    ]
  },
  {
    "cmd": [
      "git",
      "fetch",
      "origin",
      "h3ll0"
    ],
    "cwd": "[START_DIR]/checkout/b2",
    "name": "b2.git fetch",
    "timeout": 600.0,
    "~followup_annotations": [
      "@@@STEP_NEST_LEVEL@1@@@"
    ]
  },
  {
    "cmd": [
      "git",
      "checkout",
      "FETCH_HEAD"
    ],
    "cwd": "[START_DIR]/checkout/b2",
    "name": "b2.git checkout",
    "timeout": 600.0,
    "~followup_annotations": [
      "@@@STEP_NEST_LEVEL@1@@@"
    ]
  },
  {
    "cmd": [
      "git",
      "log",
      "--max-count=1",
      "--pretty=format:%H"
    ],
    "cwd": "[START_DIR]/checkout/b2",
    "name": "b2.get new revision",
    "timeout": 600.0,
    "~followup_annotations": [
      "@@@STEP_NEST_LEVEL@1@@@",
      "@@@STEP_SUMMARY_TEXT@2222222222222222222222222222222222222222@@@"
    ]
  },
  {
    "cmd": [],
    "name": "b2.get roll direction",
    "~followup_annotations": [
      "@@@STEP_NEST_LEVEL@1@@@"
    ]
  },
  {
    "cmd": [
      "git",
      "merge-base",
      "--is-ancestor",
      "1111111111111111111111111111111111111111",
      "2222222222222222222222222222222222222222"
    ],
    "cwd": "[START_DIR]/checkout/b2",
    "name": "b2.get roll direction.is forward",
    "timeout": 600.0,
    "~followup_annotations": [
      "@@@STEP_NEST_LEVEL@2@@@"
    ]
  },
  {
    "cmd": [
      "git",
      "merge-base",
      "--is-ancestor",
      "2222222222222222222222222222222222222222",
      "1111111111111111111111111111111111111111"
    ],
    "cwd": "[START_DIR]/checkout/b2",
    "name": "b2.get roll direction.is backward",
    "timeout": 600.0,
    "~followup_annotations": [
      "@@@STEP_NEST_LEVEL@2@@@"
    ]
  },
  {
    "cmd": [],
    "name": "b2.get roll direction.get roll direction",
    "~followup_annotations": [
      "@@@STEP_NEST_LEVEL@2@@@",
      "@@@STEP_SUMMARY_TEXT@up-to-date@@@"
    ]
  },
  {
    "cmd": [],
    "name": "b2.cancelling roll",
    "~followup_annotations": [
      "@@@STEP_NEST_LEVEL@1@@@",
      "@@@STEP_SUMMARY_TEXT@not updating from 1111111 to 2222222 because 1111111 is newer than 2222222@@@",
      "@@@STEP_LINK@1111111111111111111111111111111111111111@https://foo.googlesource.com/b2/+/1111111111111111111111111111111111111111@@@",
      "@@@STEP_LINK@2222222222222222222222222222222222222222@https://foo.googlesource.com/b2/+/2222222222222222222222222222222222222222@@@"
    ]
  },
  {
    "cmd": [],
    "name": "nothing to roll, exiting"
  },
  {
    "name": "$result"
  }
]