{
  "title": "schema for .braids.json configuration file",
  "type": "object",
  "properties": {
    "config_version": {
      "type": "number",
      "enum": [
        1
      ],
      "description": "configuration format version (see https://cristibalan.github.io/braid/#braid-version-compatibility)",
      "$comment": "So far, only version 1 is defined. (Version \"0\" is a mess and not worth writing a schema for.) When we have more than one defined version, we can look into the best way to make the rest of the schema dependent on the version."
    },
    "mirrors": {
      "type": "object",
      "description": "container for all added vendor repository mirrors",
      "patternProperties": {
        ".*": {
          "allOf": [
            {
              "type": "object",
              "description": "local path where the vendor content is placed, relative to the .braids.json file",
              "properties": {
                "url": {
                  "type": "string",
                  "description": "remote URL of the vendor repository"
                },
                "path": {
                  "type": "string",
                  "description": "path to a subdirectory or single file in the vendor tree (instead of the whole tree) to place at the specified local path"
                },
                "branch": {
                  "type": "string",
                  "description": "branch name of the vendor repository to track"
                },
                "tag": {
                  "type": "string",
                  "description": "tag name of the vendor repository to track"
                },
                "revision": {
                  "type": "string",
                  "description": "commit ID of the vendor repository currently used by the mirror"
                }
              },
              "required": [
                "url",
                "revision"
              ],
              "additionalProperties": false
            },
            {
              "$comment": "At most one of \"branch\" and \"tag\". Technique from https://stackoverflow.com/a/33358676 .",
              "oneOf": [
                {
                  "not": {
                    "anyOf": [
                      {
                        "required": [
                          "branch"
                        ]
                      },
                      {
                        "required": [
                          "tag"
                        ]
                      }
                    ]
                  }
                },
                {
                  "required": [
                    "branch"
                  ]
                },
                {
                  "required": [
                    "tag"
                  ]
                }
              ]
            }
          ]
        }
      }
    }
  },
  "required": [
    "config_version",
    "mirrors"
  ],
  "additionalProperties": false
}