Parse YAML-style Options from Shinylive Code Blocks

Parses YAML-style configuration options from Shinylive code block headers. These options appear as lines prefixed with '#|' and follow a simplified YAML-like syntax for key-value pairs.

Usage

parse_yaml_options(yaml_lines)

Arguments

yaml_lines

Character vector. Each element should be a line containing a YAML-style option in the format '#| key: value'. The '#|' prefix will be stripped during processing.

Value

A named list of parsed options where:

• Array values (e.g., '[1, 2, 3]') are converted to character vectors

• Boolean values ('true'/'false') are converted to logical values

• Numeric values are converted to numeric type

• Other values remain as character strings

Details

The function handles several value types:

• Arrays: Values in the format '[item1, item2, ...]'

• Booleans: Values 'true' or 'false'

• Numbers: Integer values

• Strings: All other values

Lines that don't contain a colon (':') are ignored.

See also

parse_code_block

Examples

if (FALSE) { # \dontrun{
# Parse various types of options
yaml_lines <- c(
  "#| viewerHeight: 500",
  "#| components: [slider,button]",
  "#| fullWidth: true",
  "#| title: My App"
)
options <- parse_yaml_options(yaml_lines)
# Results in:
# list(
#   viewerHeight = 500,
#   components = c("slider", "button"),
#   fullWidth = TRUE,
#   title = "My App"
# )
} # }