checkout with action "snapshot" does not generate the standard renv snapshot

[kieranjmartin]

R4.3.1 and renv 1.07.

I start with a repo with a lock file with just renv currently recorded, and add an R script with library(abc) (library doesn't matter for this, just picked a package with a smaller dependency footprint)

Running
renv::checkout("https://packagemanager.posit.co/cran/2024-08-14", actions = c("restore", "snapshot"))

Generates a lockfile which looks like this:

{
  "R": {
    "Version": "4.3.1",
    "Repositories": [
      {
        "Name": null,
        "URL": "https://packagemanager.posit.co/cran/2024-08-14"
      }
    ]
  },
  "Packages": {
    "KernSmooth": {
      "Package": "KernSmooth",
      "Version": "2.23-24",
      "Source": "Repository"
    },
    "MatrixModels": {
      "Package": "MatrixModels",
      "Version": "0.5-3",
      "Source": "Repository"
    },
{rest expunged}

Now I run renv::snapshot()

{
  "R": {
    "Version": "4.3.1",
    "Repositories": [
      {
        "Name": "CRAN",
        "URL": "https://packagemanager.posit.co/cran/2024-08-14"
      }
    ]
  },
  "Packages": {
    "MASS": {
      "Package": "MASS",
      "Version": "7.3-60",
      "Source": "Repository",
      "Repository": "RSPM",
      "Requirements": [
        "R",
        "grDevices",
        "graphics",
        "methods",
        "stats",
        "utils"
      ],
      "Hash": "a56a6365b3fa73293ea8d084be0d9bb0"
    },
    "Matrix": {
      "Package": "Matrix",
      "Version": "1.6-1.1",
      "Source": "Repository",
      "Repository": "RSPM",
      "Requirements": [
        "R",
        "grDevices",
        "graphics",
        "grid",
        "lattice",
        "methods",
        "stats",
        "utils"
      ],
      "Hash": "1a00d4828f33a9d690806e98bd17150c"
    },

Note that the new version has the hash and the dependency tree described.

As far as I can tell this isn't a huge problem; the initial snapshot will work if you are using rspm (as renv gets the correct dependency order during download anyway). (Although as a note I lost kernmooth as a dependency when I made this reprex... I don't know why that happened!).

However I think probably I expect that if I run checkout with snapshot as an action I should get identical results to running checkout then running snapshot. Right now this doesn't seem to be what happens.

[kevinushey]

Thanks for the bug report! This should now be better handled in the development version of renv.