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Update CLI documentation (#69)
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- Update usage section in the README with the latest flags.
- Update default sample output (BoardState fields have changed,
  OutOfBounds has been removed).
- Add section describing options for getting JSON output with the
  `--output` and `--debug-requests` flag.
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jlafayette authored Apr 11, 2022
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60 changes: 43 additions & 17 deletions cli/README.md
Original file line number Diff line number Diff line change
Expand Up @@ -32,19 +32,26 @@ Usage:
battlesnake play [flags]
Flags:
-d, --delay int32 Turn Delay in Milliseconds (default 0)
-D, --duration int32 Minimum Turn Duration in Milliseconds (default 0)
-g, --gametype string Type of Game Rules (default "standard")
-H, --height int32 Height of Board (default 11)
-h, --help help for play
-n, --name stringArray Name of Snake
-r, --seed int Random Seed (default 1607708568137187300)
-s, --sequential Use Sequential Processing
-S, --squad stringArray Squad of Snake
-t, --timeout int32 Request Timeout (default 500)
-u, --url stringArray URL of Snake
-v, --viewmap View the Map Each Turn
-W, --width int32 Width of Board (default 11)
-W, --width int32 Width of Board (default 11)
-H, --height int32 Height of Board (default 11)
-n, --name stringArray Name of Snake
-u, --url stringArray URL of Snake
-S, --squad stringArray Squad of Snake
-t, --timeout int32 Request Timeout (default 500)
-s, --sequential Use Sequential Processing
-g, --gametype string Type of Game Rules (default "standard")
-v, --viewmap View the Map Each Turn
-c, --color Use color to draw the map
-r, --seed int Random Seed (default 1649588785026867900)
-d, --delay int32 Turn Delay in Milliseconds
-D, --duration int32 Minimum Turn Duration in Milliseconds
--debug-requests Log body of all requests sent
-o, --output string File path to output game state to. Existing files will be overwritten
--foodSpawnChance int32 Percentage chance of spawning a new food every round (default 15)
--minimumFood int32 Minimum food to keep on the board every turn (default 1)
--hazardDamagePerTurn int32 Health damage a snake will take when ending its turn in a hazard (default 14)
--shrinkEveryNTurns int32 In Royale mode, the number of turns between generating new hazards (default 25)
-h, --help help for play
Global Flags:
--config string config file (default is $HOME/.battlesnake.yaml)
Expand Down Expand Up @@ -72,10 +79,29 @@ battlesnake play --width 7 --height 7 --name Snake1 --url http://snake1-url-what
### Sample Output
```
$ battlesnake play --width 3 --height 3 --url http://redacted:4567/ --url http://redacted:4568/ --name Bob --name Sue
2020/10/31 22:05:56 [1]: State: &{3 3 [{1 0}] [{e74892ba-9f0c-4e96-9bde-1a9efaff0ab4 [{0 1} {0 2} {0 2} {0 2}] 100 } {89e20d26-7da7-4964-b0ae-148c8f60f7ee [{2 1} {2 2} {2 2} {2 2}] 100 }]} OutOfBounds: []
2020/10/31 22:05:56 [2]: State: &{3 3 [{1 0}] [{e74892ba-9f0c-4e96-9bde-1a9efaff0ab4 [{0 0} {0 1} {0 2} {0 2}] 99 } {89e20d26-7da7-4964-b0ae-148c8f60f7ee [{2 0} {2 1} {2 2} {2 2}] 99 }]} OutOfBounds: []
2020/10/31 22:05:56 [3]: State: &{3 3 [{1 2}] [{e74892ba-9f0c-4e96-9bde-1a9efaff0ab4 [{1 0} {0 0} {0 1} {0 2} {0 2}] 100 head-collision 89e20d26-7da7-4964-b0ae-148c8f60f7ee} {89e20d26-7da7-4964-b0ae-148c8f60f7ee [{1 0} {2 0} {2 1} {2 2} {2 2}] 100 head-collision e74892ba-9f0c-4e96-9bde-1a9efaff0ab4}]} OutOfBounds: []
2020/10/31 22:05:56 [DONE]: Game completed after 3 turns. It was a draw.
2022/04/10 04:16:08 [1]: State: &{1 3 3 [{2 2} {2 0}] [{8d8e31df-a1c1-4cac-a981-2453febe76ae [{1 0} {0 0} {0 0}] 99 0 } {cb5f5f33-3b35-477d-9c32-3e3fecd0e3c2 [{1 2} {0 2} {0 2}] 99 0 }] []}
2022/04/10 04:16:08 [2]: State: &{2 3 3 [{1 1}] [{8d8e31df-a1c1-4cac-a981-2453febe76ae [{2 0} {1 0} {0 0} {0 0}] 100 0 } {cb5f5f33-3b35-477d-9c32-3e3fecd0e3c2 [{2 2} {1 2} {0 2} {0 2}] 100 0 }] []}
2022/04/10 04:16:08 [3]: State: &{3 3 3 [{1 1}] [{8d8e31df-a1c1-4cac-a981-2453febe76ae [{2 1} {2 0} {1 0} {0 0}] 99 head-collision 0 cb5f5f33-3b35-477d-9c32-3e3fecd0e3c2} {cb5f5f33-3b35-477d-9c32-3e3fecd0e3c2 [{2 1} {2 2} {1 2} {0 2}] 99 head-collision 0 8d8e31df-a1c1-4cac-a981-2453febe76ae}] []}
2022/04/10 04:16:08 [DONE]: Game completed after 3 turns. It was a draw.
```

### Sample JSON Output

The default output logs the BoardState struct each turn, but is not well suited for parsing with a script.

Use the `--output` flag to write the game state in JSON format to a log file, for example:
```
battlesnake play --output out.log --name Snake1 --url http://snake1-url-whatever --name Snake2 --url http://snake2-url-whatever
```

The above command will write the game state each turn as a single line to `out.log` file. An example line:
```
{"game":{"id":"202b0f42-8d66-4adf-b29c-5ae1afd4c3cf","ruleset":{"name":"standard","version":"cli","settings":{"foodSpawnChance":15,"minimumFood":1,"hazardDamagePerTurn":14,"hazardMap":"","hazardMapAuthor":"","royale":{"shrinkEveryNTurns":0},"squad":{"allowBodyCollisions":false,"sharedElimination":false,"sharedHealth":false,"sharedLength":false}}},"timeout":500,"source":""},"turn":60,"board":{"height":11,"width":11,"snakes":[{"id":"55860e87-7c39-4911-8b67-aea861f27af6","name":"Snake1","latency":"0","health":98,"body":[{"x":10,"y":8},{"x":10,"y":9},{"x":10,"y":10},{"x":9,"y":10},{"x":9,"y":9},{"x":9,"y":8},{"x":8,"y":8},{"x":7,"y":8}],"head":{"x":10,"y":8},"length":8,"shout":"","squad":"","customizations":{"color":"#03d3fc","head":"beluga","tail":"bolt"}},{"id":"fdb00735-1602-4a4c-bf23-2b704f80bbeb","name":"Snake2","latency":"0","health":92,"body":[{"x":9,"y":7},{"x":8,"y":7},{"x":7,"y":7},{"x":7,"y":6},{"x":7,"y":5},{"x":8,"y":5},{"x":9,"y":5},{"x":9,"y":4},{"x":8,"y":4}],"head":{"x":9,"y":7},"length":9,"shout":"","squad":"","customizations":{"color":"#03d3fc","head":"beluga","tail":"bolt"}}],"food":[{"x":4,"y":6},{"x":0,"y":9},{"x":4,"y":5}],"hazards":[]},"you":{"id":"55860e87-7c39-4911-8b67-aea861f27af6","name":"Snake1","latency":"0","health":98,"body":[{"x":10,"y":8},{"x":10,"y":9},{"x":10,"y":10},{"x":9,"y":10},{"x":9,"y":9},{"x":9,"y":8},{"x":8,"y":8},{"x":7,"y":8}],"head":{"x":10,"y":8},"length":8,"shout":"","squad":"","customizations":{"color":"#03d3fc","head":"beluga","tail":"bolt"}}}
```

To get the request data sent to each snake, use the `--debug-requests` flag (note this contains the `you` field which is missing in data generated using the `--output` flag):
```
2022/04/10 04:41:16 POST http://localhost:8080/move: {"game":{"id":"0baa4367-b1ee-40c7-96c8-34227b88af24","ruleset":{"name":"standard","version":"cli","settings":{"foodSpawnChance":15,"minimumFood":1,"hazardDamagePerTurn":14,"hazardMap":"","hazardMapAuthor":"","royale":{"shrinkEveryNTurns":0},"squad":{"allowBodyCollisions":false,"sharedElimination":false,"sharedHealth":false,"sharedLength":false}}},"timeout":500,"source":""},"turn":5,"board":{"height":11,"width":11,"snakes":[{"id":"5bddff9f-d3ff-458c-b0f5-df81a830b5d8","name":"Snake1","latency":"0","health":96,"body":[{"x":5,"y":7},{"x":4,"y":7},{"x":4,"y":8}],"head":{"x":5,"y":7},"length":3,"shout":"","squad":"","customizations":{"color":"#03d3fc","head":"beluga","tail":"bolt"}},{"id":"f76e8994-6457-49f0-9102-6a1bcfee5695","name":"Snake2","latency":"0","health":96,"body":[{"x":6,"y":6},{"x":7,"y":6},{"x":7,"y":5}],"head":{"x":6,"y":6},"length":3,"shout":"","squad":"","customizations":{"color":"#03d3fc","head":"beluga","tail":"bolt"}}],"food":[{"x":6,"y":10},{"x":10,"y":4},{"x":5,"y":5},{"x":9,"y":0}],"hazards":[]},"you":{"id":"f76e8994-6457-49f0-9102-6a1bcfee5695","name":"Snake2","latency":"0","health":96,"body":[{"x":6,"y":6},{"x":7,"y":6},{"x":7,"y":5}],"head":{"x":6,"y":6},"length":3,"shout":"","squad":"","customizations":{"color":"#03d3fc","head":"beluga","tail":"bolt"}}}
```

### Sample Output (With ASCII Board)
Expand Down

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