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    "cmd": [
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        "hostname": "rdbhost"
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    "name": "applying foo:555.git fetch",
    "~followup_annotations": [
      "@@@STEP_NEST_LEVEL@1@@@"
    ]
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  {
    "cmd": [
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        "hostname": "rdbhost"
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    "name": "applying foo:555.git checkout",
    "~followup_annotations": [
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    ]
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  {
    "cmd": [
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      "resultdb": {
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          "update_token": "token"
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        "hostname": "rdbhost"
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    },
    "name": "applying foo:555.get new revision",
    "~followup_annotations": [
      "@@@STEP_NEST_LEVEL@1@@@"
    ]
  },
  {
    "cmd": [],
    "name": "applying foo:555.remote",
    "~followup_annotations": [
      "@@@STEP_NEST_LEVEL@1@@@"
    ]
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  {
    "cmd": [
      "git",
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    "cwd": "[START_DIR]/checkout/ham",
    "luci_context": {
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      "resultdb": {
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        "hostname": "rdbhost"
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    "name": "applying foo:555.remote.name",
    "~followup_annotations": [
      "@@@STEP_NEST_LEVEL@2@@@"
    ]
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  {
    "cmd": [
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    "luci_context": {
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        "hostname": "rdbhost"
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    "name": "applying foo:555.remote.url",
    "~followup_annotations": [
      "@@@STEP_NEST_LEVEL@2@@@"
    ]
  },
  {
    "cmd": [],
    "name": "applying foo:555.ham",
    "~followup_annotations": [
      "@@@STEP_NEST_LEVEL@1@@@"
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    "cmd": [
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      "--pretty=format:%H\n%ae\n%B",
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      "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa..HASH"
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    "cwd": "[START_DIR]/checkout/ham",
    "luci_context": {
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        "name": "project:ci"
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      "resultdb": {
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        "hostname": "rdbhost"
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    },
    "name": "applying foo:555.ham.git log",
    "~followup_annotations": [
      "@@@STEP_NEST_LEVEL@2@@@"
    ]
  },
  {
    "cmd": [
      "[START_DIR]/cipd_tool/path/to/gerrit/version%3Apinned-version/gerrit",
      "change-query",
      "-host",
      "https://pigweed-review.googlesource.com",
      "-input",
      "{\"params\": {\"q\": \"commit:5555555555555555555555555555555555555555\"}}",
      "-output",
      "/path/to/tmp/json"
    ],
    "cwd": "[START_DIR]/checkout/ham",
    "luci_context": {
      "realm": {
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      "resultdb": {
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        },
        "hostname": "rdbhost"
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    },
    "name": "applying foo:555.ham.get change-id",
    "timeout": 600,
    "~followup_annotations": [
      "@@@STEP_NEST_LEVEL@2@@@",
      "@@@STEP_LOG_LINE@json.output@[@@@",
      "@@@STEP_LOG_LINE@json.output@  {@@@",
      "@@@STEP_LOG_LINE@json.output@    \"_number\": 12345@@@",
      "@@@STEP_LOG_LINE@json.output@  }@@@",
      "@@@STEP_LOG_LINE@json.output@]@@@",
      "@@@STEP_LOG_END@json.output@@@",
      "@@@STEP_LOG_LINE@json.input@{@@@",
      "@@@STEP_LOG_LINE@json.input@  \"params\": {@@@",
      "@@@STEP_LOG_LINE@json.input@    \"q\": \"commit:5555555555555555555555555555555555555555\"@@@",
      "@@@STEP_LOG_LINE@json.input@  }@@@",
      "@@@STEP_LOG_LINE@json.input@}@@@",
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  {
    "cmd": [
      "[START_DIR]/cipd_tool/path/to/gerrit/version%3Apinned-version/gerrit",
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      "-host",
      "https://pigweed-review.googlesource.com",
      "-input",
      "{\"change_id\": \"12345\"}",
      "-output",
      "/path/to/tmp/json"
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    "cwd": "[START_DIR]/checkout/ham",
    "luci_context": {
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      "resultdb": {
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        "hostname": "rdbhost"
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    "name": "applying foo:555.ham.get 12345",
    "timeout": 600,
    "~followup_annotations": [
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      "@@@STEP_LOG_LINE@json.output@{@@@",
      "@@@STEP_LOG_LINE@json.output@  \"owner\": {@@@",
      "@@@STEP_LOG_LINE@json.output@    \"email\": \"owner@example.com\"@@@",
      "@@@STEP_LOG_LINE@json.output@  }, @@@",
      "@@@STEP_LOG_LINE@json.output@  \"reviewers\": {@@@",
      "@@@STEP_LOG_LINE@json.output@    \"REVIEWER\": [@@@",
      "@@@STEP_LOG_LINE@json.output@      {@@@",
      "@@@STEP_LOG_LINE@json.output@        \"email\": \"reviewer@example.com\"@@@",
      "@@@STEP_LOG_LINE@json.output@      }, @@@",
      "@@@STEP_LOG_LINE@json.output@      {@@@",
      "@@@STEP_LOG_LINE@json.output@        \"email\": \"nobody@google.com\"@@@",
      "@@@STEP_LOG_LINE@json.output@      }, @@@",
      "@@@STEP_LOG_LINE@json.output@      {@@@",
      "@@@STEP_LOG_LINE@json.output@        \"email\": \"robot@gserviceaccount.com\"@@@",
      "@@@STEP_LOG_LINE@json.output@      }@@@",
      "@@@STEP_LOG_LINE@json.output@    ]@@@",
      "@@@STEP_LOG_LINE@json.output@  }@@@",
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      "@@@STEP_LOG_END@json.output@@@",
      "@@@STEP_LOG_LINE@json.input@{@@@",
      "@@@STEP_LOG_LINE@json.input@  \"change_id\": \"12345\"@@@",
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      "@@@STEP_LOG_END@json.input@@@",
      "@@@STEP_LINK@gerrit link@https://pigweed-review.googlesource.com/q/12345@@@"
    ]
  },
  {
    "cmd": [],
    "name": "roll message"
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  {
    "cmd": [],
    "name": "roll message.message for ham",
    "~followup_annotations": [
      "@@@STEP_NEST_LEVEL@1@@@",
      "@@@STEP_LOG_LINE@template@[roll {project_name}] {sanitized_message}@@@",
      "@@@STEP_LOG_LINE@template@@@@",
      "@@@STEP_LOG_LINE@template@{remote}@@@",
      "@@@STEP_LOG_LINE@template@{project_name} Rolled-Commits: {old_revision:.15}..{new_revision:.15}@@@",
      "@@@STEP_LOG_END@template@@@",
      "@@@STEP_LOG_LINE@kwargs@'new_revision': 'HASH'@@@",
      "@@@STEP_LOG_LINE@kwargs@'old_revision': 'aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa'@@@",
      "@@@STEP_LOG_LINE@kwargs@'original_message': 'module: Short commit summary\\n\\nLonger commit details.\\n\\nBug: 123\\nChange-Id: I5555555555555555555555555555555555555555\\nReviewed-On: https://pigweed-review.googlesource.com/c/project/+/55555'@@@",
      "@@@STEP_LOG_LINE@kwargs@'project_name': 'ham'@@@",
      "@@@STEP_LOG_LINE@kwargs@'remote': 'https://pigweed.googlesource.com/pigweed/pigweed'@@@",
      "@@@STEP_LOG_LINE@kwargs@'sanitized_message': 'module: Short commit summary\\n\\nLonger commit details.\\n\\nOriginal-Bug: 123\\nReviewed-On: https://pigweed-review.googlesource.com/c/project/+/55555'@@@",
      "@@@STEP_LOG_END@kwargs@@@",
      "@@@STEP_LOG_LINE@message@[roll ham] module: Short commit summary@@@",
      "@@@STEP_LOG_LINE@message@@@@",
      "@@@STEP_LOG_LINE@message@Longer commit details.@@@",
      "@@@STEP_LOG_LINE@message@@@@",
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      "@@@STEP_LOG_LINE@message@Reviewed-On: https://pigweed-review.googlesource.com/c/project/+/55555@@@",
      "@@@STEP_LOG_LINE@message@@@@",
      "@@@STEP_LOG_LINE@message@https://pigweed.googlesource.com/pigweed/pigweed@@@",
      "@@@STEP_LOG_LINE@message@ham Rolled-Commits: aaaaaaaaaaaaaaa..HASH@@@",
      "@@@STEP_LOG_END@message@@@"
    ]
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  {
    "cmd": [],
    "name": "roll message.message for spam",
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      "@@@STEP_LOG_LINE@template@{remote}@@@",
      "@@@STEP_LOG_LINE@template@{project_name} Rolled-Commits: {old_revision:.15}..{new_revision:.15}@@@",
      "@@@STEP_LOG_END@template@@@",
      "@@@STEP_LOG_LINE@kwargs@'new_revision': '2222222222222222222222222222222222222222'@@@",
      "@@@STEP_LOG_LINE@kwargs@'old_revision': '1111111111111111111111111111111111111111'@@@",
      "@@@STEP_LOG_LINE@kwargs@'original_message': 'module: Short commit summary\\n\\nLonger commit details.\\n\\nBug: 123\\nChange-Id: I2222222222222222222222222222222222222222\\nReviewed-On: https://pigweed-review.googlesource.com/c/project/+/22222'@@@",
      "@@@STEP_LOG_LINE@kwargs@'project_name': 'spam'@@@",
      "@@@STEP_LOG_LINE@kwargs@'remote': 'https://pigweed.googlesource.com/pigweed/pigweed'@@@",
      "@@@STEP_LOG_LINE@kwargs@'sanitized_message': 'module: Short commit summary\\n\\nLonger commit details.\\n\\nOriginal-Bug: 123\\nReviewed-On: https://pigweed-review.googlesource.com/c/project/+/22222'@@@",
      "@@@STEP_LOG_END@kwargs@@@",
      "@@@STEP_LOG_LINE@message@[roll spam] module: Short commit summary@@@",
      "@@@STEP_LOG_LINE@message@@@@",
      "@@@STEP_LOG_LINE@message@Longer commit details.@@@",
      "@@@STEP_LOG_LINE@message@@@@",
      "@@@STEP_LOG_LINE@message@Original-Bug: 123@@@",
      "@@@STEP_LOG_LINE@message@Reviewed-On: https://pigweed-review.googlesource.com/c/project/+/22222@@@",
      "@@@STEP_LOG_LINE@message@@@@",
      "@@@STEP_LOG_LINE@message@https://pigweed.googlesource.com/pigweed/pigweed@@@",
      "@@@STEP_LOG_LINE@message@spam Rolled-Commits: 111111111111111..222222222222222@@@",
      "@@@STEP_LOG_END@message@@@"
    ]
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  {
    "cmd": [
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      "ls-files",
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    "name": "check for no-op commit",
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    "name": "git add"
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    "cwd": "[START_DIR]/checkout",
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    "luci_context": {
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          "update_token": "token"
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        "hostname": "rdbhost"
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    "name": "git rev-parse"
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  {
    "cmd": [],
    "name": "calculate Change-Id",
    "~followup_annotations": [
      "@@@STEP_TEXT@I27ec3e6a65adbbeb0f5d0b74ef7036a069efcfe8@@@"
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  {
    "cmd": [
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    "luci_context": {
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        "hostname": "rdbhost"
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    "name": "calculate Change-Id.git diff",
    "~followup_annotations": [
      "@@@STEP_NEST_LEVEL@1@@@",
      "@@@STEP_LOG_LINE@diff (without hashes)@diff --git a/foo.txt b/foo.txt@@@",
      "@@@STEP_LOG_LINE@diff (without hashes)@--- a/foo.txt@@@",
      "@@@STEP_LOG_LINE@diff (without hashes)@+++ b/foo.txt@@@",
      "@@@STEP_LOG_LINE@diff (without hashes)@@@ -16 +16 @@@@@",
      "@@@STEP_LOG_LINE@diff (without hashes)@-        foo = 5@@@",
      "@@@STEP_LOG_LINE@diff (without hashes)@+        foo = 6@@@",
      "@@@STEP_LOG_LINE@diff (without hashes)@diff --git a/bar.txt b/bar.txt@@@",
      "@@@STEP_LOG_LINE@diff (without hashes)@--- a/bar.txt@@@",
      "@@@STEP_LOG_LINE@diff (without hashes)@+++ b/bar.txt@@@",
      "@@@STEP_LOG_LINE@diff (without hashes)@@@ -5 +5 @@@@@",
      "@@@STEP_LOG_LINE@diff (without hashes)@-        bar = 0@@@",
      "@@@STEP_LOG_LINE@diff (without hashes)@+        bar = 1@@@",
      "@@@STEP_LOG_LINE@diff (without hashes)@@@@",
      "@@@STEP_LOG_END@diff (without hashes)@@@"
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    "cmd": [
      "git",
      "hash-object",
      "diff --git a/foo.txt b/foo.txt\n--- a/foo.txt\n+++ b/foo.txt\n@@ -16 +16 @@\n-        foo = 5\n+        foo = 6\ndiff --git a/bar.txt b/bar.txt\n--- a/bar.txt\n+++ b/bar.txt\n@@ -5 +5 @@\n-        bar = 0\n+        bar = 1\n####builder####dry-run####"
    ],
    "cwd": "[START_DIR]/checkout",
    "infra_step": true,
    "luci_context": {
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        "hostname": "rdbhost"
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    "name": "calculate Change-Id.git hash-object",
    "~followup_annotations": [
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    "cmd": [
      "[START_DIR]/cipd_tool/path/to/gerrit/version%3Apinned-version/gerrit",
      "change-query",
      "-host",
      "https://pigweed-review.googlesource.com",
      "-input",
      "{\"params\": {\"o\": [\"CURRENT_COMMIT\", \"CURRENT_REVISION\", \"MESSAGES\"], \"q\": \"change:pigweed/pigweed~main~I27ec3e6a65adbbeb0f5d0b74ef7036a069efcfe8\"}}",
      "-output",
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    "cwd": "[START_DIR]/checkout",
    "infra_step": true,
    "luci_context": {
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      "resultdb": {
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          "update_token": "token"
        },
        "hostname": "rdbhost"
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    },
    "name": "check for identical roll",
    "timeout": 600,
    "~followup_annotations": [
      "@@@STEP_LOG_LINE@json.output@null@@@",
      "@@@STEP_LOG_END@json.output@@@",
      "@@@STEP_LOG_LINE@json.input@{@@@",
      "@@@STEP_LOG_LINE@json.input@  \"params\": {@@@",
      "@@@STEP_LOG_LINE@json.input@    \"o\": [@@@",
      "@@@STEP_LOG_LINE@json.input@      \"CURRENT_COMMIT\", @@@",
      "@@@STEP_LOG_LINE@json.input@      \"CURRENT_REVISION\", @@@",
      "@@@STEP_LOG_LINE@json.input@      \"MESSAGES\"@@@",
      "@@@STEP_LOG_LINE@json.input@    ], @@@",
      "@@@STEP_LOG_LINE@json.input@    \"q\": \"change:pigweed/pigweed~main~I27ec3e6a65adbbeb0f5d0b74ef7036a069efcfe8\"@@@",
      "@@@STEP_LOG_LINE@json.input@  }@@@",
      "@@@STEP_LOG_LINE@json.input@}@@@",
      "@@@STEP_LOG_END@json.input@@@"
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  {
    "cmd": [
      "git",
      "commit",
      "-m",
      "[roll ham, spam] Roll 2 commits\n\n[roll ham] module: Short commit summary\n\nLonger commit details.\n\nOriginal-Bug: 123\nReviewed-On: https://pigweed-review.googlesource.com/c/project/+/55555\n\nhttps://pigweed.googlesource.com/pigweed/pigweed\nham Rolled-Commits: aaaaaaaaaaaaaaa..HASH\n\n[roll spam] module: Short commit summary\n\nLonger commit details.\n\nOriginal-Bug: 123\nReviewed-On: https://pigweed-review.googlesource.com/c/project/+/22222\n\nhttps://pigweed.googlesource.com/pigweed/pigweed\nspam Rolled-Commits: 111111111111111..222222222222222\n\n\nRoller-URL: https://ci.chromium.org/b/8945511751514863184\nCq-Cl-Tag: roller-builder:builder\nCq-Cl-Tag: roller-bid:8945511751514863184\nCQ-Do-Not-Cancel-Tryjobs: true\nChange-Id: I27ec3e6a65adbbeb0f5d0b74ef7036a069efcfe8",
      "-a"
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    "cwd": "[START_DIR]/checkout",
    "infra_step": true,
    "luci_context": {
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      "resultdb": {
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        "hostname": "rdbhost"
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    "name": "git commit"
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  {
    "cmd": [
      "git",
      "push",
      "--push-option",
      "nokeycheck",
      "origin",
      "HEAD:refs/for/main%l=Commit-Queue+1"
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    "cwd": "[START_DIR]/checkout",
    "infra_step": true,
    "luci_context": {
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      "resultdb": {
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          "update_token": "token"
        },
        "hostname": "rdbhost"
      }
    },
    "name": "git push",
    "timeout": 180.0,
    "~followup_annotations": [
      "@@@STEP_LOG_LINE@stdout@@@@",
      "@@@STEP_LOG_END@stdout@@@",
      "@@@STEP_LINK@gerrit link@https://pigweed-review.googlesource.com/q/pigweed/pigweed~main~I27ec3e6a65adbbeb0f5d0b74ef7036a069efcfe8@@@"
    ]
  },
  {
    "cmd": [],
    "name": "check for completion"
  },
  {
    "cmd": [
      "[START_DIR]/cipd_tool/path/to/gerrit/version%3Apinned-version/gerrit",
      "change-detail",
      "-host",
      "https://pigweed-review.googlesource.com",
      "-input",
      "{\"change_id\": \"pigweed/pigweed~main~I27ec3e6a65adbbeb0f5d0b74ef7036a069efcfe8\", \"params\": {\"o\": [\"CURRENT_REVISION\"]}}",
      "-output",
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    "infra_step": true,
    "luci_context": {
      "realm": {
        "name": "project:ci"
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      "resultdb": {
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          "update_token": "token"
        },
        "hostname": "rdbhost"
      }
    },
    "name": "check for completion.check if done (0)",
    "timeout": 30.0,
    "~followup_annotations": [
      "@@@STEP_NEST_LEVEL@1@@@",
      "@@@STEP_LOG_LINE@json.output@{@@@",
      "@@@STEP_LOG_LINE@json.output@  \"current_revision\": \"abc123\", @@@",
      "@@@STEP_LOG_LINE@json.output@  \"labels\": {@@@",
      "@@@STEP_LOG_LINE@json.output@    \"Commit-Queue\": {}@@@",
      "@@@STEP_LOG_LINE@json.output@  }, @@@",
      "@@@STEP_LOG_LINE@json.output@  \"messages\": [@@@",
      "@@@STEP_LOG_LINE@json.output@    {@@@",
      "@@@STEP_LOG_LINE@json.output@      \"message\": \"Dry run: CQ is trying the patch\", @@@",
      "@@@STEP_LOG_LINE@json.output@      \"tag\": \"autogenerated:cv\"@@@",
      "@@@STEP_LOG_LINE@json.output@    }, @@@",
      "@@@STEP_LOG_LINE@json.output@    {@@@",
      "@@@STEP_LOG_LINE@json.output@      \"message\": \"Dry run: This CL passed the CQ dry run.\", @@@",
      "@@@STEP_LOG_LINE@json.output@      \"tag\": \"autogenerated:cv\"@@@",
      "@@@STEP_LOG_LINE@json.output@    }@@@",
      "@@@STEP_LOG_LINE@json.output@  ], @@@",
      "@@@STEP_LOG_LINE@json.output@  \"status\": \"NEW\"@@@",
      "@@@STEP_LOG_LINE@json.output@}@@@",
      "@@@STEP_LOG_END@json.output@@@",
      "@@@STEP_LOG_LINE@json.input@{@@@",
      "@@@STEP_LOG_LINE@json.input@  \"change_id\": \"pigweed/pigweed~main~I27ec3e6a65adbbeb0f5d0b74ef7036a069efcfe8\", @@@",
      "@@@STEP_LOG_LINE@json.input@  \"params\": {@@@",
      "@@@STEP_LOG_LINE@json.input@    \"o\": [@@@",
      "@@@STEP_LOG_LINE@json.input@      \"CURRENT_REVISION\"@@@",
      "@@@STEP_LOG_LINE@json.input@    ]@@@",
      "@@@STEP_LOG_LINE@json.input@  }@@@",
      "@@@STEP_LOG_LINE@json.input@}@@@",
      "@@@STEP_LOG_END@json.input@@@",
      "@@@STEP_LINK@gerrit link@https://pigweed-review.googlesource.com/q/pigweed/pigweed~main~I27ec3e6a65adbbeb0f5d0b74ef7036a069efcfe8@@@"
    ]
  },
  {
    "cmd": [
      "[START_DIR]/cipd_tool/path/to/gerrit/version%3Apinned-version/gerrit",
      "change-abandon",
      "-host",
      "https://pigweed-review.googlesource.com",
      "-input",
      "{\"change_id\": \"pigweed/pigweed~main~I27ec3e6a65adbbeb0f5d0b74ef7036a069efcfe8\", \"input\": {\"message\": \"Dry run passed.\"}}",
      "-output",
      "/path/to/tmp/json"
    ],
    "luci_context": {
      "realm": {
        "name": "project:ci"
      },
      "resultdb": {
        "current_invocation": {
          "name": "invocations/build:8945511751514863184",
          "update_token": "token"
        },
        "hostname": "rdbhost"
      }
    },
    "name": "abandon roll",
    "timeout": 600,
    "~followup_annotations": [
      "@@@STEP_TEXT@dry run passed@@@",
      "@@@STEP_LOG_END@json.output (invalid)@@@",
      "@@@STEP_LOG_LINE@json.output (exception)@No JSON object could be decoded@@@",
      "@@@STEP_LOG_END@json.output (exception)@@@",
      "@@@STEP_LOG_LINE@json.input@{@@@",
      "@@@STEP_LOG_LINE@json.input@  \"change_id\": \"pigweed/pigweed~main~I27ec3e6a65adbbeb0f5d0b74ef7036a069efcfe8\", @@@",
      "@@@STEP_LOG_LINE@json.input@  \"input\": {@@@",
      "@@@STEP_LOG_LINE@json.input@    \"message\": \"Dry run passed.\"@@@",
      "@@@STEP_LOG_LINE@json.input@  }@@@",
      "@@@STEP_LOG_LINE@json.input@}@@@",
      "@@@STEP_LOG_END@json.input@@@",
      "@@@STEP_LINK@gerrit link@https://pigweed-review.googlesource.com/q/pigweed/pigweed~main~I27ec3e6a65adbbeb0f5d0b74ef7036a069efcfe8@@@"
    ]
  },
  {
    "name": "$result"
  }
]