{
  "$schema": "http://json-schema.org/draft-07/schema#",
  "$comment": "v0.1.0",
  "title": "Pipeline Schema",
  "description": "A dvc.yaml pipeline definition",
  "type": "object",
  "definitions": {
    "OutputFlags": {
      "type": "object",
      "description": "Output file with more flags",
      "properties": {
        "cache": {
          "description": "Cache outputs by dvc",
          "type": "boolean",
          "default": true
        },
        "persist": {
          "description": "Persist outputs among runs",
          "type": "boolean",
          "default": false
        }
      }
    },
    "PlotFlags": {
      "description": "Plots file with more flags",
      "allOf": [
        {
          "$ref": "#/definitions/OutputFlags"
        }
      ],
      "$comment": "Unfortunately, 'additionalProperties' only works props in immediate schema.",
      "properties": {
        "cache": {},
        "persist": {},
        "x": {
          "description": "Default field name to use as x-axis data",
          "type": [
            "string",
            "integer"
          ]
        },
        "y": {
          "description": "Default field name to use as y-axis data",
          "type": [
            "string",
            "integer"
          ]
        },
        "x_label": {
          "description": "Default label for the x-axis",
          "type": "string"
        },
        "y_label": {
          "description": "Default label for the y-axis",
          "type": "string"
        },
        "template": {
          "description": "Default plot template",
          "type": "string"
        },
        "title": {
          "description": "Default plot title",
          "type": "string"
        },
        "header": {
          "description": "The target CSV or TSV has a header",
          "type": "boolean",
          "default": false
        }
      },
      "additionalProperties": false
    },
    "Output": {
      "description": "An output of the stage",
      "anyOf": [
        {
          "type": "string",
          "description": "Output will be cached by dvc"
        },
        {
          "type": "object",
          "description": "Output file",
          "patternProperties": {
            "^.*$": {
              "$ref": "#/definitions/OutputFlags",
              "additionalProperties": false
            }
          },
          "additionalProperties": false,
          "maxProperties": 1
        }
      ]
    }
  },
  "properties": {
    "stages": {
      "description": "List of stages.",
      "type": "object",
      "patternProperties": {
        "^[A-Za-z0-9_-]+$": {
          "description": "The stage",
          "type": "object",
          "properties": {
            "cmd": {
              "type": ["string", "array"],
              "description": "Command(s) to run"
            },
            "wdir": {
              "type": "string",
              "description": "Working directory"
            },
            "deps": {
              "type": "array",
              "description": "Dependencies for the stage",
              "items": {
                "type": "string",
                "description": "A dependency for the stage"
              },
              "minItems": 1,
              "uniqueItems": true
            },
            "params": {
              "type": "array",
              "description": "Params for the stage",
              "items": {
                "anyOf": [
                  {
                    "type": "string",
                    "description": "Params from default params file"
                  },
                  {
                    "type": "object",
                    "description": "Params from custom params file",
                    "patternProperties": {
                      "^.*$": {
                        "type": "array",
                        "description": "Custom params file",
                        "items": {
                          "type": "string",
                          "description": "Params from custom file"
                        },
                        "minItems": 1,
                        "uniqueItems": true
                      }
                    },
                    "additionalProperties": false,
                    "maxProperties": 1
                  }
                ]
              },
              "minItems": 1,
              "uniqueItems": true
            },
            "outs": {
              "type": "array",
              "description": "Outputs of the stage",
              "items": {
                "$ref": "#/definitions/Output"
              },
              "minItems": 1,
              "uniqueItems": true
            },
            "metrics": {
              "type": "array",
              "description": "Metrics outputs of the stage",
              "items": {
                "$ref": "#/definitions/Output"
              },
              "minItems": 1,
              "uniqueItems": true
            },
            "plots": {
              "type": "array",
              "description": "Plots outputs of the stage",
              "items": {
                "anyOf": [
                  {
                    "type": "string",
                    "description": "Plots will be cached by dvc"
                  },
                  {
                    "type": "object",
                    "description": "Output file",
                    "patternProperties": {
                      "^.*$": {
                        "$ref": "#/definitions/PlotFlags"
                      }
                    },
                    "maxProperties": 1
                  }
                ]
              },
              "minItems": 1,
              "uniqueItems": true
            },
            "frozen": {
              "type": "boolean",
              "description": "Assume stage as unchanged",
              "default": false
            },
            "locked": {
              "type": "boolean",
              "description": "Assume stage as unchanged (deprecated)",
              "default": false
            },
            "always_changed": {
              "type": "boolean",
              "description": "Assume stage as always changed.",
              "default": false
            },
            "meta": {
              "description": "Additional information/metadata"
            }
          },
          "additionalProperties": false,
          "required": [
            "cmd"
          ]
        }
      },
      "additionalProperties": false
    }
  },
  "required": [
    "stages"
  ]
}