read_config.md
In hubUtils: Core 'hubverse' Utilities

read_config works on local hubs

Code
  read_config(hub_path = system.file("testhubs", "simple", package = "hubUtils"))
Output
  $schema_version
  [1] "https://raw.githubusercontent.com/hubverse-org/schemas/main/v2.0.0/tasks-schema.json"

  $rounds
  $rounds[[1]]
  $rounds[[1]]$round_id_from_variable
  [1] TRUE

  $rounds[[1]]$round_id
  [1] "origin_date"

  $rounds[[1]]$model_tasks
  $rounds[[1]]$model_tasks[[1]]
  $rounds[[1]]$model_tasks[[1]]$task_ids
  $rounds[[1]]$model_tasks[[1]]$task_ids$origin_date
  $rounds[[1]]$model_tasks[[1]]$task_ids$origin_date$required
  NULL

  $rounds[[1]]$model_tasks[[1]]$task_ids$origin_date$optional
  [1] "2022-10-01" "2022-10-08"


  $rounds[[1]]$model_tasks[[1]]$task_ids$target
  $rounds[[1]]$model_tasks[[1]]$task_ids$target$required
  [1] "wk inc flu hosp"

  $rounds[[1]]$model_tasks[[1]]$task_ids$target$optional
  NULL


  $rounds[[1]]$model_tasks[[1]]$task_ids$horizon
  $rounds[[1]]$model_tasks[[1]]$task_ids$horizon$required
  [1] 1

  $rounds[[1]]$model_tasks[[1]]$task_ids$horizon$optional
  [1] 2 3 4


  $rounds[[1]]$model_tasks[[1]]$task_ids$location
  $rounds[[1]]$model_tasks[[1]]$task_ids$location$required
  NULL

  $rounds[[1]]$model_tasks[[1]]$task_ids$location$optional
   [1] "US" "01" "02" "04" "05" "06" "08" "09" "10" "11" "12" "13" "15" "16" "17"
  [16] "18" "19" "20" "21" "22" "23" "24" "25" "26" "27" "28" "29" "30" "31" "32"
  [31] "33" "34" "35" "36" "37" "38" "39" "40" "41" "42" "44" "45" "46" "47" "48"
  [46] "49" "50" "51" "53" "54" "55" "56" "72" "78"



  $rounds[[1]]$model_tasks[[1]]$output_type
  $rounds[[1]]$model_tasks[[1]]$output_type$mean
  $rounds[[1]]$model_tasks[[1]]$output_type$mean$output_type_id
  $rounds[[1]]$model_tasks[[1]]$output_type$mean$output_type_id$required
  NULL

  $rounds[[1]]$model_tasks[[1]]$output_type$mean$output_type_id$optional
  [1] NA


  $rounds[[1]]$model_tasks[[1]]$output_type$mean$value
  $rounds[[1]]$model_tasks[[1]]$output_type$mean$value$type
  [1] "integer"

  $rounds[[1]]$model_tasks[[1]]$output_type$mean$value$minimum
  [1] 0



  $rounds[[1]]$model_tasks[[1]]$output_type$quantile
  $rounds[[1]]$model_tasks[[1]]$output_type$quantile$output_type_id
  $rounds[[1]]$model_tasks[[1]]$output_type$quantile$output_type_id$required
   [1] 0.010 0.025 0.050 0.100 0.150 0.200 0.250 0.300 0.350 0.400 0.450 0.500
  [13] 0.550 0.600 0.650 0.700 0.750 0.800 0.850 0.900 0.950 0.975 0.990

  $rounds[[1]]$model_tasks[[1]]$output_type$quantile$output_type_id$optional
  NULL


  $rounds[[1]]$model_tasks[[1]]$output_type$quantile$value
  $rounds[[1]]$model_tasks[[1]]$output_type$quantile$value$type
  [1] "integer"

  $rounds[[1]]$model_tasks[[1]]$output_type$quantile$value$minimum
  [1] 0




  $rounds[[1]]$model_tasks[[1]]$target_metadata
  $rounds[[1]]$model_tasks[[1]]$target_metadata[[1]]
  $rounds[[1]]$model_tasks[[1]]$target_metadata[[1]]$target_id
  [1] "wk inc flu hosp"

  $rounds[[1]]$model_tasks[[1]]$target_metadata[[1]]$target_name
  [1] "Weekly incident influenza hospitalizations"

  $rounds[[1]]$model_tasks[[1]]$target_metadata[[1]]$target_units
  [1] "count"

  $rounds[[1]]$model_tasks[[1]]$target_metadata[[1]]$target_keys
  $rounds[[1]]$model_tasks[[1]]$target_metadata[[1]]$target_keys$target
  [1] "wk inc flu hosp"


  $rounds[[1]]$model_tasks[[1]]$target_metadata[[1]]$target_type
  [1] "continuous"

  $rounds[[1]]$model_tasks[[1]]$target_metadata[[1]]$is_step_ahead
  [1] TRUE

  $rounds[[1]]$model_tasks[[1]]$target_metadata[[1]]$time_unit
  [1] "week"





  $rounds[[1]]$submissions_due
  $rounds[[1]]$submissions_due$relative_to
  [1] "origin_date"

  $rounds[[1]]$submissions_due$start
  [1] -6

  $rounds[[1]]$submissions_due$end
  [1] 1



  $rounds[[2]]
  $rounds[[2]]$round_id_from_variable
  [1] TRUE

  $rounds[[2]]$round_id
  [1] "origin_date"

  $rounds[[2]]$model_tasks
  $rounds[[2]]$model_tasks[[1]]
  $rounds[[2]]$model_tasks[[1]]$task_ids
  $rounds[[2]]$model_tasks[[1]]$task_ids$origin_date
  $rounds[[2]]$model_tasks[[1]]$task_ids$origin_date$required
  NULL

  $rounds[[2]]$model_tasks[[1]]$task_ids$origin_date$optional
  [1] "2022-10-15" "2022-10-22" "2022-10-29"


  $rounds[[2]]$model_tasks[[1]]$task_ids$target
  $rounds[[2]]$model_tasks[[1]]$task_ids$target$required
  [1] "wk inc flu hosp"

  $rounds[[2]]$model_tasks[[1]]$task_ids$target$optional
  NULL


  $rounds[[2]]$model_tasks[[1]]$task_ids$horizon
  $rounds[[2]]$model_tasks[[1]]$task_ids$horizon$required
  [1] 1

  $rounds[[2]]$model_tasks[[1]]$task_ids$horizon$optional
  [1] 2 3 4


  $rounds[[2]]$model_tasks[[1]]$task_ids$location
  $rounds[[2]]$model_tasks[[1]]$task_ids$location$required
  NULL

  $rounds[[2]]$model_tasks[[1]]$task_ids$location$optional
   [1] "US" "01" "02" "04" "05" "06" "08" "09" "10" "11" "12" "13" "15" "16" "17"
  [16] "18" "19" "20" "21" "22" "23" "24" "25" "26" "27" "28" "29" "30" "31" "32"
  [31] "33" "34" "35" "36" "37" "38" "39" "40" "41" "42" "44" "45" "46" "47" "48"
  [46] "49" "50" "51" "53" "54" "55" "56" "72" "78"


  $rounds[[2]]$model_tasks[[1]]$task_ids$age_group
  $rounds[[2]]$model_tasks[[1]]$task_ids$age_group$required
  [1] "65+"

  $rounds[[2]]$model_tasks[[1]]$task_ids$age_group$optional
  [1] "0-5"   "6-18"  "19-24" "25-64"



  $rounds[[2]]$model_tasks[[1]]$output_type
  $rounds[[2]]$model_tasks[[1]]$output_type$mean
  $rounds[[2]]$model_tasks[[1]]$output_type$mean$output_type_id
  $rounds[[2]]$model_tasks[[1]]$output_type$mean$output_type_id$required
  NULL

  $rounds[[2]]$model_tasks[[1]]$output_type$mean$output_type_id$optional
  [1] NA


  $rounds[[2]]$model_tasks[[1]]$output_type$mean$value
  $rounds[[2]]$model_tasks[[1]]$output_type$mean$value$type
  [1] "integer"

  $rounds[[2]]$model_tasks[[1]]$output_type$mean$value$minimum
  [1] 0



  $rounds[[2]]$model_tasks[[1]]$output_type$quantile
  $rounds[[2]]$model_tasks[[1]]$output_type$quantile$output_type_id
  $rounds[[2]]$model_tasks[[1]]$output_type$quantile$output_type_id$required
   [1] 0.010 0.025 0.050 0.100 0.150 0.200 0.250 0.300 0.350 0.400 0.450 0.500
  [13] 0.550 0.600 0.650 0.700 0.750 0.800 0.850 0.900 0.950 0.975 0.990

  $rounds[[2]]$model_tasks[[1]]$output_type$quantile$output_type_id$optional
  NULL


  $rounds[[2]]$model_tasks[[1]]$output_type$quantile$value
  $rounds[[2]]$model_tasks[[1]]$output_type$quantile$value$type
  [1] "integer"

  $rounds[[2]]$model_tasks[[1]]$output_type$quantile$value$minimum
  [1] 0




  $rounds[[2]]$model_tasks[[1]]$target_metadata
  $rounds[[2]]$model_tasks[[1]]$target_metadata[[1]]
  $rounds[[2]]$model_tasks[[1]]$target_metadata[[1]]$target_id
  [1] "wk inc flu hosp"

  $rounds[[2]]$model_tasks[[1]]$target_metadata[[1]]$target_name
  [1] "Weekly incident influenza hospitalizations"

  $rounds[[2]]$model_tasks[[1]]$target_metadata[[1]]$target_units
  [1] "count"

  $rounds[[2]]$model_tasks[[1]]$target_metadata[[1]]$target_keys
  $rounds[[2]]$model_tasks[[1]]$target_metadata[[1]]$target_keys$target
  [1] "wk inc flu hosp"


  $rounds[[2]]$model_tasks[[1]]$target_metadata[[1]]$target_type
  [1] "continuous"

  $rounds[[2]]$model_tasks[[1]]$target_metadata[[1]]$is_step_ahead
  [1] TRUE

  $rounds[[2]]$model_tasks[[1]]$target_metadata[[1]]$time_unit
  [1] "week"





  $rounds[[2]]$submissions_due
  $rounds[[2]]$submissions_due$relative_to
  [1] "origin_date"

  $rounds[[2]]$submissions_due$start
  [1] -6

  $rounds[[2]]$submissions_due$end
  [1] 1

Code
  read_config(hub_path = system.file("testhubs", "simple", package = "hubUtils"),
  config = "admin")
Output
  $schema_version
  [1] "https://raw.githubusercontent.com/hubverse-org/schemas/main/v2.0.0/admin-schema.json"

  $name
  [1] "Simple Forecast Hub"

  $maintainer
  [1] "Consortium of Infectious Disease Modeling Hubs"

  $contact
  $contact$name
  [1] "Joe Bloggs"

  $contact$email
  [1] "j.bloggs@cidmh.com"


  $repository_url
  [1] "https://github.com/hubverse-org/example-simple-forecast-hub"

  $hub_models
  $hub_models[[1]]
  $hub_models[[1]]$team_abbr
  [1] "simple_hub"

  $hub_models[[1]]$model_abbr
  [1] "baseline"

  $hub_models[[1]]$model_type
  [1] "baseline"



  $file_format
  [1] "csv"     "parquet" "arrow"

  $timezone
  [1] "US/Eastern"

Code
  read_config(hub_path = system.file("testhubs", "simple", package = "hubUtils"),
  config = "model-metadata-schema")
Output
  $`$schema`
  [1] "http://json-schema.org/draft-07/schema"

  $title
  [1] "ForecastHub model metadata"

  $description
  [1] "This is the schema of the model metadata file."

  $type
  [1] "object"

  $properties
  $properties$team_name
  $properties$team_name$description
  [1] "The name of the team submitting the model"

  $properties$team_name$type
  [1] "string"


  $properties$team_abbr
  $properties$team_abbr$description
  [1] "Abbreviated name of the team submitting the model"

  $properties$team_abbr$type
  [1] "string"

  $properties$team_abbr$pattern
  [1] "^[a-zA-Z0-9_+]+$"

  $properties$team_abbr$maxLength
  [1] 16


  $properties$model_name
  $properties$model_name$description
  [1] "The name of the model"

  $properties$model_name$type
  [1] "string"


  $properties$model_abbr
  $properties$model_abbr$description
  [1] "Abbreviated name of the model"

  $properties$model_abbr$type
  [1] "string"

  $properties$model_abbr$pattern
  [1] "^[a-zA-Z0-9_+]+$"

  $properties$model_abbr$maxLength
  [1] 16


  $properties$model_version
  $properties$model_version$description
  [1] "Identifier of the version of the model"

  $properties$model_version$type
  [1] "string"


  $properties$model_contributors
  $properties$model_contributors$type
  [1] "array"

  $properties$model_contributors$items
  $properties$model_contributors$items$type
  [1] "object"

  $properties$model_contributors$items$properties
  $properties$model_contributors$items$properties$name
  $properties$model_contributors$items$properties$name$type
  [1] "string"


  $properties$model_contributors$items$properties$email
  $properties$model_contributors$items$properties$email$type
  [1] "string"

  $properties$model_contributors$items$properties$email$format
  [1] "email"


  $properties$model_contributors$items$properties$twitter
  $properties$model_contributors$items$properties$twitter$type
  [1] "string"



  $properties$model_contributors$items$additionalProperties
  [1] FALSE

  $properties$model_contributors$items$required
  [1] "name"  "email"



  $properties$website_url
  $properties$website_url$description
  [1] "Public facing website for the model"

  $properties$website_url$type
  [1] "string"

  $properties$website_url$format
  [1] "uri"


  $properties$repo_url
  $properties$repo_url$description
  [1] "Repository containing code for the model"

  $properties$repo_url$type
  [1] "string"

  $properties$repo_url$format
  [1] "uri"


  $properties$license
  $properties$license$description
  [1] "License for use of model output data"

  $properties$license$type
  [1] "string"

  $properties$license$enum
  [1] "apache-2.0"      "cc-by-4.0"       "cc-by-nc-4.0"    "cc-by-nc-nd-4.0"
  [5] "cc-by-sa-4.0"    "gpl-3.0"         "lgpl-3.0"        "mit"


  $properties$include_viz
  $properties$include_viz$description
  [1] "Indicator for whether the model should be included in the Hub’s visualization"

  $properties$include_viz$type
  [1] "boolean"


  $properties$include_ensemble
  $properties$include_ensemble$description
  [1] "Indicator for whether the model should be included in the Hub’s ensemble"

  $properties$include_ensemble$type
  [1] "boolean"


  $properties$include_eval
  $properties$include_eval$description
  [1] "Indicator for whether the model should be scored for inclusion in the Hub’s evaluations"

  $properties$include_eval$type
  [1] "boolean"


  $properties$model_details
  $properties$model_details$type
  [1] "object"

  $properties$model_details$properties
  $properties$model_details$properties$data_inputs
  $properties$model_details$properties$data_inputs$type
  [1] "string"


  $properties$model_details$properties$methods
  $properties$model_details$properties$methods$type
  [1] "string"

  $properties$model_details$properties$methods$maxLength
  [1] 200


  $properties$model_details$properties$methods_long
  $properties$model_details$properties$methods_long$type
  [1] "string"



  $properties$model_details$additionalProperties
  [1] FALSE

  $properties$model_details$required
  [1] "data_inputs" "methods"


  $properties$ensemble_of_hub_models
  $properties$ensemble_of_hub_models$description
  [1] "Indicator for whether this model is an ensemble of other Hub models"

  $properties$ensemble_of_hub_models$type
  [1] "boolean"



  $additionalProperties
  [1] FALSE

  $required
   [1] "team_name"          "team_abbr"          "model_name"        
   [4] "model_abbr"         "model_contributors" "website_url"       
   [7] "license"            "include_viz"        "include_ensemble"  
  [10] "include_eval"       "model_details"

read_config works on S3 cloud hubs

Code
  read_config(hub_path = suppressMessages(arrow::s3_bucket(
    "hubverse/hubutils/testhubs/simple/")))
Output
  $schema_version
  [1] "https://raw.githubusercontent.com/Infectious-Disease-Modeling-Hubs/schemas/main/v2.0.0/tasks-schema.json"

  $rounds
  $rounds[[1]]
  $rounds[[1]]$round_id_from_variable
  [1] TRUE

  $rounds[[1]]$round_id
  [1] "origin_date"

  $rounds[[1]]$model_tasks
  $rounds[[1]]$model_tasks[[1]]
  $rounds[[1]]$model_tasks[[1]]$task_ids
  $rounds[[1]]$model_tasks[[1]]$task_ids$origin_date
  $rounds[[1]]$model_tasks[[1]]$task_ids$origin_date$required
  NULL

  $rounds[[1]]$model_tasks[[1]]$task_ids$origin_date$optional
  [1] "2022-10-01" "2022-10-08"


  $rounds[[1]]$model_tasks[[1]]$task_ids$target
  $rounds[[1]]$model_tasks[[1]]$task_ids$target$required
  [1] "wk inc flu hosp"

  $rounds[[1]]$model_tasks[[1]]$task_ids$target$optional
  NULL


  $rounds[[1]]$model_tasks[[1]]$task_ids$horizon
  $rounds[[1]]$model_tasks[[1]]$task_ids$horizon$required
  [1] 1

  $rounds[[1]]$model_tasks[[1]]$task_ids$horizon$optional
  [1] 2 3 4


  $rounds[[1]]$model_tasks[[1]]$task_ids$location
  $rounds[[1]]$model_tasks[[1]]$task_ids$location$required
  NULL

  $rounds[[1]]$model_tasks[[1]]$task_ids$location$optional
   [1] "US" "01" "02" "04" "05" "06" "08" "09" "10" "11" "12" "13" "15" "16" "17"
  [16] "18" "19" "20" "21" "22" "23" "24" "25" "26" "27" "28" "29" "30" "31" "32"
  [31] "33" "34" "35" "36" "37" "38" "39" "40" "41" "42" "44" "45" "46" "47" "48"
  [46] "49" "50" "51" "53" "54" "55" "56" "72" "78"



  $rounds[[1]]$model_tasks[[1]]$output_type
  $rounds[[1]]$model_tasks[[1]]$output_type$mean
  $rounds[[1]]$model_tasks[[1]]$output_type$mean$output_type_id
  $rounds[[1]]$model_tasks[[1]]$output_type$mean$output_type_id$required
  NULL

  $rounds[[1]]$model_tasks[[1]]$output_type$mean$output_type_id$optional
  [1] NA


  $rounds[[1]]$model_tasks[[1]]$output_type$mean$value
  $rounds[[1]]$model_tasks[[1]]$output_type$mean$value$type
  [1] "integer"

  $rounds[[1]]$model_tasks[[1]]$output_type$mean$value$minimum
  [1] 0



  $rounds[[1]]$model_tasks[[1]]$output_type$quantile
  $rounds[[1]]$model_tasks[[1]]$output_type$quantile$output_type_id
  $rounds[[1]]$model_tasks[[1]]$output_type$quantile$output_type_id$required
   [1] 0.010 0.025 0.050 0.100 0.150 0.200 0.250 0.300 0.350 0.400 0.450 0.500
  [13] 0.550 0.600 0.650 0.700 0.750 0.800 0.850 0.900 0.950 0.975 0.990

  $rounds[[1]]$model_tasks[[1]]$output_type$quantile$output_type_id$optional
  NULL


  $rounds[[1]]$model_tasks[[1]]$output_type$quantile$value
  $rounds[[1]]$model_tasks[[1]]$output_type$quantile$value$type
  [1] "integer"

  $rounds[[1]]$model_tasks[[1]]$output_type$quantile$value$minimum
  [1] 0




  $rounds[[1]]$model_tasks[[1]]$target_metadata
  $rounds[[1]]$model_tasks[[1]]$target_metadata[[1]]
  $rounds[[1]]$model_tasks[[1]]$target_metadata[[1]]$target_id
  [1] "wk inc flu hosp"

  $rounds[[1]]$model_tasks[[1]]$target_metadata[[1]]$target_name
  [1] "Weekly incident influenza hospitalizations"

  $rounds[[1]]$model_tasks[[1]]$target_metadata[[1]]$target_units
  [1] "count"

  $rounds[[1]]$model_tasks[[1]]$target_metadata[[1]]$target_keys
  $rounds[[1]]$model_tasks[[1]]$target_metadata[[1]]$target_keys$target
  [1] "wk inc flu hosp"


  $rounds[[1]]$model_tasks[[1]]$target_metadata[[1]]$target_type
  [1] "continuous"

  $rounds[[1]]$model_tasks[[1]]$target_metadata[[1]]$is_step_ahead
  [1] TRUE

  $rounds[[1]]$model_tasks[[1]]$target_metadata[[1]]$time_unit
  [1] "week"





  $rounds[[1]]$submissions_due
  $rounds[[1]]$submissions_due$relative_to
  [1] "origin_date"

  $rounds[[1]]$submissions_due$start
  [1] -6

  $rounds[[1]]$submissions_due$end
  [1] 1



  $rounds[[2]]
  $rounds[[2]]$round_id_from_variable
  [1] TRUE

  $rounds[[2]]$round_id
  [1] "origin_date"

  $rounds[[2]]$model_tasks
  $rounds[[2]]$model_tasks[[1]]
  $rounds[[2]]$model_tasks[[1]]$task_ids
  $rounds[[2]]$model_tasks[[1]]$task_ids$origin_date
  $rounds[[2]]$model_tasks[[1]]$task_ids$origin_date$required
  NULL

  $rounds[[2]]$model_tasks[[1]]$task_ids$origin_date$optional
  [1] "2022-10-15" "2022-10-22" "2022-10-29"


  $rounds[[2]]$model_tasks[[1]]$task_ids$target
  $rounds[[2]]$model_tasks[[1]]$task_ids$target$required
  [1] "wk inc flu hosp"

  $rounds[[2]]$model_tasks[[1]]$task_ids$target$optional
  NULL


  $rounds[[2]]$model_tasks[[1]]$task_ids$horizon
  $rounds[[2]]$model_tasks[[1]]$task_ids$horizon$required
  [1] 1

  $rounds[[2]]$model_tasks[[1]]$task_ids$horizon$optional
  [1] 2 3 4


  $rounds[[2]]$model_tasks[[1]]$task_ids$location
  $rounds[[2]]$model_tasks[[1]]$task_ids$location$required
  NULL

  $rounds[[2]]$model_tasks[[1]]$task_ids$location$optional
   [1] "US" "01" "02" "04" "05" "06" "08" "09" "10" "11" "12" "13" "15" "16" "17"
  [16] "18" "19" "20" "21" "22" "23" "24" "25" "26" "27" "28" "29" "30" "31" "32"
  [31] "33" "34" "35" "36" "37" "38" "39" "40" "41" "42" "44" "45" "46" "47" "48"
  [46] "49" "50" "51" "53" "54" "55" "56" "72" "78"


  $rounds[[2]]$model_tasks[[1]]$task_ids$age_group
  $rounds[[2]]$model_tasks[[1]]$task_ids$age_group$required
  [1] "65+"

  $rounds[[2]]$model_tasks[[1]]$task_ids$age_group$optional
  [1] "0-5"   "6-18"  "19-24" "25-64"



  $rounds[[2]]$model_tasks[[1]]$output_type
  $rounds[[2]]$model_tasks[[1]]$output_type$mean
  $rounds[[2]]$model_tasks[[1]]$output_type$mean$output_type_id
  $rounds[[2]]$model_tasks[[1]]$output_type$mean$output_type_id$required
  NULL

  $rounds[[2]]$model_tasks[[1]]$output_type$mean$output_type_id$optional
  [1] NA


  $rounds[[2]]$model_tasks[[1]]$output_type$mean$value
  $rounds[[2]]$model_tasks[[1]]$output_type$mean$value$type
  [1] "integer"

  $rounds[[2]]$model_tasks[[1]]$output_type$mean$value$minimum
  [1] 0



  $rounds[[2]]$model_tasks[[1]]$output_type$quantile
  $rounds[[2]]$model_tasks[[1]]$output_type$quantile$output_type_id
  $rounds[[2]]$model_tasks[[1]]$output_type$quantile$output_type_id$required
   [1] 0.010 0.025 0.050 0.100 0.150 0.200 0.250 0.300 0.350 0.400 0.450 0.500
  [13] 0.550 0.600 0.650 0.700 0.750 0.800 0.850 0.900 0.950 0.975 0.990

  $rounds[[2]]$model_tasks[[1]]$output_type$quantile$output_type_id$optional
  NULL


  $rounds[[2]]$model_tasks[[1]]$output_type$quantile$value
  $rounds[[2]]$model_tasks[[1]]$output_type$quantile$value$type
  [1] "integer"

  $rounds[[2]]$model_tasks[[1]]$output_type$quantile$value$minimum
  [1] 0




  $rounds[[2]]$model_tasks[[1]]$target_metadata
  $rounds[[2]]$model_tasks[[1]]$target_metadata[[1]]
  $rounds[[2]]$model_tasks[[1]]$target_metadata[[1]]$target_id
  [1] "wk inc flu hosp"

  $rounds[[2]]$model_tasks[[1]]$target_metadata[[1]]$target_name
  [1] "Weekly incident influenza hospitalizations"

  $rounds[[2]]$model_tasks[[1]]$target_metadata[[1]]$target_units
  [1] "count"

  $rounds[[2]]$model_tasks[[1]]$target_metadata[[1]]$target_keys
  $rounds[[2]]$model_tasks[[1]]$target_metadata[[1]]$target_keys$target
  [1] "wk inc flu hosp"


  $rounds[[2]]$model_tasks[[1]]$target_metadata[[1]]$target_type
  [1] "continuous"

  $rounds[[2]]$model_tasks[[1]]$target_metadata[[1]]$is_step_ahead
  [1] TRUE

  $rounds[[2]]$model_tasks[[1]]$target_metadata[[1]]$time_unit
  [1] "week"





  $rounds[[2]]$submissions_due
  $rounds[[2]]$submissions_due$relative_to
  [1] "origin_date"

  $rounds[[2]]$submissions_due$start
  [1] -6

  $rounds[[2]]$submissions_due$end
  [1] 1

read_config_file works

Code
  read_config_file(system.file("config", "tasks.json", package = "hubUtils"))
Output
  $schema_version
  [1] "https://raw.githubusercontent.com/hubverse-org/schemas/main/v3.0.0/tasks-schema.json"

  $rounds
  $rounds[[1]]
  $rounds[[1]]$round_id_from_variable
  [1] TRUE

  $rounds[[1]]$round_id
  [1] "forecast_date"

  $rounds[[1]]$model_tasks
  $rounds[[1]]$model_tasks[[1]]
  $rounds[[1]]$model_tasks[[1]]$task_ids
  $rounds[[1]]$model_tasks[[1]]$task_ids$forecast_date
  $rounds[[1]]$model_tasks[[1]]$task_ids$forecast_date$required
  NULL

  $rounds[[1]]$model_tasks[[1]]$task_ids$forecast_date$optional
   [1] "2022-12-12" "2022-12-19" "2022-12-26" "2023-01-02" "2023-01-09"
   [6] "2023-01-16" "2023-01-23" "2023-01-30" "2023-02-06" "2023-02-13"
  [11] "2023-02-20" "2023-02-27" "2023-03-06" "2023-03-13" "2023-03-20"
  [16] "2023-03-27" "2023-04-03" "2023-04-10" "2023-04-17" "2023-04-24"
  [21] "2023-05-01" "2023-05-08" "2023-05-15"


  $rounds[[1]]$model_tasks[[1]]$task_ids$target
  $rounds[[1]]$model_tasks[[1]]$task_ids$target$required
  NULL

  $rounds[[1]]$model_tasks[[1]]$task_ids$target$optional
  [1] "wk ahead inc flu hosp"


  $rounds[[1]]$model_tasks[[1]]$task_ids$horizon
  $rounds[[1]]$model_tasks[[1]]$task_ids$horizon$required
  [1] 2

  $rounds[[1]]$model_tasks[[1]]$task_ids$horizon$optional
  [1] 1


  $rounds[[1]]$model_tasks[[1]]$task_ids$location
  $rounds[[1]]$model_tasks[[1]]$task_ids$location$required
  [1] "US"

  $rounds[[1]]$model_tasks[[1]]$task_ids$location$optional
  [1] "01" "02"



  $rounds[[1]]$model_tasks[[1]]$output_type
  $rounds[[1]]$model_tasks[[1]]$output_type$sample
  $rounds[[1]]$model_tasks[[1]]$output_type$sample$output_type_id_params
  $rounds[[1]]$model_tasks[[1]]$output_type$sample$output_type_id_params$is_required
  [1] TRUE

  $rounds[[1]]$model_tasks[[1]]$output_type$sample$output_type_id_params$type
  [1] "character"

  $rounds[[1]]$model_tasks[[1]]$output_type$sample$output_type_id_params$min_samples_per_task
  [1] 50

  $rounds[[1]]$model_tasks[[1]]$output_type$sample$output_type_id_params$max_samples_per_task
  [1] 100


  $rounds[[1]]$model_tasks[[1]]$output_type$sample$value
  $rounds[[1]]$model_tasks[[1]]$output_type$sample$value$type
  [1] "integer"

  $rounds[[1]]$model_tasks[[1]]$output_type$sample$value$minimum
  [1] 0



  $rounds[[1]]$model_tasks[[1]]$output_type$mean
  $rounds[[1]]$model_tasks[[1]]$output_type$mean$output_type_id
  $rounds[[1]]$model_tasks[[1]]$output_type$mean$output_type_id$required
  NULL

  $rounds[[1]]$model_tasks[[1]]$output_type$mean$output_type_id$optional
  [1] NA


  $rounds[[1]]$model_tasks[[1]]$output_type$mean$value
  $rounds[[1]]$model_tasks[[1]]$output_type$mean$value$type
  [1] "double"

  $rounds[[1]]$model_tasks[[1]]$output_type$mean$value$minimum
  [1] 0




  $rounds[[1]]$model_tasks[[1]]$target_metadata
  $rounds[[1]]$model_tasks[[1]]$target_metadata[[1]]
  $rounds[[1]]$model_tasks[[1]]$target_metadata[[1]]$target_id
  [1] "wk ahead inc flu hosp"

  $rounds[[1]]$model_tasks[[1]]$target_metadata[[1]]$target_name
  [1] "weekly influenza hospitalization incidence"

  $rounds[[1]]$model_tasks[[1]]$target_metadata[[1]]$target_units
  [1] "rate per 100,000 population"

  $rounds[[1]]$model_tasks[[1]]$target_metadata[[1]]$target_keys
  $rounds[[1]]$model_tasks[[1]]$target_metadata[[1]]$target_keys$target
  [1] "wk ahead inc flu hosp"


  $rounds[[1]]$model_tasks[[1]]$target_metadata[[1]]$target_type
  [1] "discrete"

  $rounds[[1]]$model_tasks[[1]]$target_metadata[[1]]$description
  [1] "This target represents the counts of new hospitalizations per horizon week."

  $rounds[[1]]$model_tasks[[1]]$target_metadata[[1]]$is_step_ahead
  [1] TRUE

  $rounds[[1]]$model_tasks[[1]]$target_metadata[[1]]$time_unit
  [1] "week"




  $rounds[[1]]$model_tasks[[2]]
  $rounds[[1]]$model_tasks[[2]]$task_ids
  $rounds[[1]]$model_tasks[[2]]$task_ids$forecast_date
  $rounds[[1]]$model_tasks[[2]]$task_ids$forecast_date$required
  NULL

  $rounds[[1]]$model_tasks[[2]]$task_ids$forecast_date$optional
   [1] "2022-12-12" "2022-12-19" "2022-12-26" "2023-01-02" "2023-01-09"
   [6] "2023-01-16" "2023-01-23" "2023-01-30" "2023-02-06" "2023-02-13"
  [11] "2023-02-20" "2023-02-27" "2023-03-06" "2023-03-13" "2023-03-20"
  [16] "2023-03-27" "2023-04-03" "2023-04-10" "2023-04-17" "2023-04-24"
  [21] "2023-05-01" "2023-05-08" "2023-05-15"


  $rounds[[1]]$model_tasks[[2]]$task_ids$target
  $rounds[[1]]$model_tasks[[2]]$task_ids$target$required
  NULL

  $rounds[[1]]$model_tasks[[2]]$task_ids$target$optional
  [1] "wk flu hosp rate change"


  $rounds[[1]]$model_tasks[[2]]$task_ids$horizon
  $rounds[[1]]$model_tasks[[2]]$task_ids$horizon$required
  [1] 2

  $rounds[[1]]$model_tasks[[2]]$task_ids$horizon$optional
  [1] 1


  $rounds[[1]]$model_tasks[[2]]$task_ids$location
  $rounds[[1]]$model_tasks[[2]]$task_ids$location$required
  [1] "US"

  $rounds[[1]]$model_tasks[[2]]$task_ids$location$optional
  [1] "01" "02"



  $rounds[[1]]$model_tasks[[2]]$output_type
  $rounds[[1]]$model_tasks[[2]]$output_type$pmf
  $rounds[[1]]$model_tasks[[2]]$output_type$pmf$output_type_id
  $rounds[[1]]$model_tasks[[2]]$output_type$pmf$output_type_id$required
  [1] "large_decrease" "decrease"       "stable"         "increase"      
  [5] "large_increase"

  $rounds[[1]]$model_tasks[[2]]$output_type$pmf$output_type_id$optional
  NULL


  $rounds[[1]]$model_tasks[[2]]$output_type$pmf$value
  $rounds[[1]]$model_tasks[[2]]$output_type$pmf$value$type
  [1] "double"

  $rounds[[1]]$model_tasks[[2]]$output_type$pmf$value$minimum
  [1] 0

  $rounds[[1]]$model_tasks[[2]]$output_type$pmf$value$maximum
  [1] 1




  $rounds[[1]]$model_tasks[[2]]$target_metadata
  $rounds[[1]]$model_tasks[[2]]$target_metadata[[1]]
  $rounds[[1]]$model_tasks[[2]]$target_metadata[[1]]$target_id
  [1] "wk flu hosp rate change"

  $rounds[[1]]$model_tasks[[2]]$target_metadata[[1]]$target_name
  [1] "weekly influenza hospitalization rate change"

  $rounds[[1]]$model_tasks[[2]]$target_metadata[[1]]$target_units
  [1] "rate per 100,000 population"

  $rounds[[1]]$model_tasks[[2]]$target_metadata[[1]]$target_keys
  $rounds[[1]]$model_tasks[[2]]$target_metadata[[1]]$target_keys$target
  [1] "wk flu hosp rate change"


  $rounds[[1]]$model_tasks[[2]]$target_metadata[[1]]$target_type
  [1] "nominal"

  $rounds[[1]]$model_tasks[[2]]$target_metadata[[1]]$description
  [1] "This target represents the change in the rate of new hospitalizations per week comparing the week ending two days prior to the forecast_date to the week ending h weeks after the forecast_date."

  $rounds[[1]]$model_tasks[[2]]$target_metadata[[1]]$is_step_ahead
  [1] TRUE

  $rounds[[1]]$model_tasks[[2]]$target_metadata[[1]]$time_unit
  [1] "week"





  $rounds[[1]]$submissions_due
  $rounds[[1]]$submissions_due$relative_to
  [1] "forecast_date"

  $rounds[[1]]$submissions_due$start
  [1] -6

  $rounds[[1]]$submissions_due$end
  [1] 2