handling nested list types

[dpastoor]

in rv's new lockfile format, we're capturing dependency constraints if they exist in the dependencies array

So a field can now look like:

[[packages]]
name = "gsm.app"
version = "2.4.0"
source = { git = "https://github.com/gilead-biostats/gsm.app", sha = "2bade6a78617abc9154f3c92117012260a5477b5", tag = "v2.4.0" }
force_source = true
dependencies = [
    "bslib",
    "cli",
    "dplyr",
    "favawesome",
    "glue",
    "gsm.core",
    "gsm.kri",
    { name = "gt", requirement = "(>= 0.11.1.9000)" },
    "htmltools",
    "htmlwidgets",
    "jsonlite",
    "magrittr",
    "purrr",
    "rlang",
    { name = "shiny", requirement = "(>= 1.6.0)" },
    "shinyjs",
    "shinyWidgets",
    "yaml",
]

and when calling tomledit get the following:

> toml_data <- tomledit::read_toml("rv.lock")
> tomledit::get_item(toml_data, "packages")

thread '<unnamed>' panicked at src/to_robj.rs:96:34:
called `Result::unwrap()` on an `Err` value: ExpectedString(list!(name=["gt"], requirement=["(>= 0.11.1.9000)"]))
stack backtrace:
note: Some details are omitted, run with `RUST_BACKTRACE=full` for a verbose backtrace.

so the parsing needs another layer.

here is a complete snippet from an rv.lock file with version 2 syntax:

# This file is automatically @generated by rv.
# It is not intended for manual editing.
version = 2
r_version = "4.4"

[[packages]]
name = "DBI"
version = "1.2.3"
source = { repository = "https://prism.dev.a2-ai.cloud/rpkgs/stratus/2025-04-26" }
force_source = false
dependencies = []

[[packages]]
name = "DT"
version = "0.33"
source = { repository = "https://prism.dev.a2-ai.cloud/rpkgs/stratus/2025-04-26" }
force_source = false
dependencies = [
    { name = "htmltools", requirement = "(>= 0.3.6)" },
    { name = "htmlwidgets", requirement = "(>= 1.3)" },
    "httpuv",
    { name = "jsonlite", requirement = "(>= 0.9.16)" },
    "magrittr",
    "crosstalk",
    "jquerylib",
    "promises",
]

[[packages]]
name = "Matrix"
version = "1.7-1"
source = { builtin = true }
force_source = false
dependencies = [
    "lattice",
]

if you want to see the src code for any reason to see the data/structures where toml stuff is being called on creation:

https://github.com/A2-ai/rv/blob/main/src/lockfile.rs#L327

[JosiahParry]

Thanks for the reproducible example! I'll try and get to this over the weekend !

[JosiahParry]

There was a bug in the logic that determined the corresponding R type. Though the annoying thing is that there isn't a clear way to massage this output as something that can be easily inserted back in as an array of tables

library(tomledit)

r"{[[packages]]
name = "gsm.app"
version = "2.4.0"
source = { git = "https://github.com/gilead-biostats/gsm.app", sha = "2bade6a78617abc9154f3c92117012260a5477b5", tag = "v2.4.0" }
force_source = true
dependencies = [
    "bslib",
    "cli",
    "dplyr",
    "favawesome",
    "glue",
    "gsm.core",
    "gsm.kri",
    { name = "gt", requirement = "(>= 0.11.1.9000)" },
    "htmltools",
    "htmlwidgets",
    "jsonlite",
    "magrittr",
    "purrr",
    "rlang",
    { name = "shiny", requirement = "(>= 1.6.0)" },
    "shinyjs",
    "shinyWidgets",
    "yaml",
]}" -> toml

tt <- parse_toml(toml)

get_item(tt, "packages")
#> [[1]]
#> [[1]]$name
#> [1] "gsm.app"
#> 
#> [[1]]$version
#> [1] "2.4.0"
#> 
#> [[1]]$source
#> [[1]]$source$git
#> [1] "https://github.com/gilead-biostats/gsm.app"
#> 
#> [[1]]$source$sha
#> [1] "2bade6a78617abc9154f3c92117012260a5477b5"
#> 
#> [[1]]$source$tag
#> [1] "v2.4.0"
#> 
#> 
#> [[1]]$force_source
#> [1] TRUE
#> 
#> [[1]]$dependencies
#> [[1]]$dependencies[[1]]
#> [1] "bslib"
#> 
#> [[1]]$dependencies[[2]]
#> [1] "cli"
#> 
#> [[1]]$dependencies[[3]]
#> [1] "dplyr"
#> 
#> [[1]]$dependencies[[4]]
#> [1] "favawesome"
#> 
#> [[1]]$dependencies[[5]]
#> [1] "glue"
#> 
#> [[1]]$dependencies[[6]]
#> [1] "gsm.core"
#> 
#> [[1]]$dependencies[[7]]
#> [1] "gsm.kri"
#> 
#> [[1]]$dependencies[[8]]
#> [[1]]$dependencies[[8]]$name
#> [1] "gt"
#> 
#> [[1]]$dependencies[[8]]$requirement
#> [1] "(>= 0.11.1.9000)"
#> 
#> 
#> [[1]]$dependencies[[9]]
#> [1] "htmltools"
#> 
#> [[1]]$dependencies[[10]]
#> [1] "htmlwidgets"
#> 
#> [[1]]$dependencies[[11]]
#> [1] "jsonlite"
#> 
#> [[1]]$dependencies[[12]]
#> [1] "magrittr"
#> 
#> [[1]]$dependencies[[13]]
#> [1] "purrr"
#> 
#> [[1]]$dependencies[[14]]
#> [1] "rlang"
#> 
#> [[1]]$dependencies[[15]]
#> [[1]]$dependencies[[15]]$name
#> [1] "shiny"
#> 
#> [[1]]$dependencies[[15]]$requirement
#> [1] "(>= 1.6.0)"
#> 
#> 
#> [[1]]$dependencies[[16]]
#> [1] "shinyjs"
#> 
#> [[1]]$dependencies[[17]]
#> [1] "shinyWidgets"
#> 
#> [[1]]$dependencies[[18]]
#> [1] "yaml"

[JosiahParry]

Let me know if the most recent development version works