Removal of revisions endpoints in CKAN 2.9

[fjuniorr]

It looks like the endpoints revision_list and package_revision_list were removed in CKAN 2.9 (see the Changelog):

library(ckanr)

ckan2.8_url <- "https://data.ontario.ca/"
revision2.8 <- revision_list(url = ckan2.8_url)
package_revision2.8 <- package_revision_list("crown-timber-charges-for-forestry-companies", url = ckan2.8_url)

ckan2.9_url <- "https://dados.mg.gov.br/"
revision2.9 <- revision_list(url = ckan2.9_url)
#> Error: 400 - Bad Request
#>   "Requisi\u00e7\u00e3o incorreta - Action name not known: revision_list"
package_revision2.9 <- package_revision_list("diarias", url = ckan2.9_url)
#> Error: 400 - Bad Request
#>   "Requisi\u00e7\u00e3o incorreta - Action name not known: package_revision_list"

^{Created on 2022-10-31 with reprex v2.0.2}

The activity_diff endpoint appears to be the new relevant endpoint, but I still couldn't understand it's usage.

Session Info and Traceback

R version 4.2.1 (2022-06-23)
Platform: x86_64-apple-darwin17.0 (64-bit)
Running under: macOS Big Sur 11.2.3

Matrix products: default
LAPACK: /Library/Frameworks/R.framework/Versions/4.2/Resources/lib/libRlapack.dylib

locale:
[1] en_US.UTF-8/en_US.UTF-8/en_US.UTF-8/C/en_US.UTF-8/en_US.UTF-8

attached base packages:
[1] stats     graphics  grDevices utils     datasets  methods   base     

other attached packages:
[1] ckanr_0.6.0.92 DBI_1.1.3     

loaded via a namespace (and not attached):
 [1] Rcpp_1.0.9        urlchecker_1.0.1  pillar_1.8.1      compiler_4.2.1    later_1.3.0       dbplyr_2.2.1     
 [7] remotes_2.4.2     profvis_0.3.7     prettyunits_1.1.1 tools_4.2.1       pkgload_1.3.0     pkgbuild_1.3.1   
[13] digest_0.6.29     jsonlite_1.8.1    memoise_2.0.1     lifecycle_1.0.2   tibble_3.1.8      pkgconfig_2.0.3  
[19] rlang_1.0.6       shiny_1.7.2       cli_3.4.1         rstudioapi_0.14   crul_1.3          curl_4.3.2       
[25] fastmap_1.1.0     stringr_1.4.1     dplyr_1.0.10      htmlwidgets_1.5.4 generics_0.1.3    vctrs_0.4.2      
[31] fs_1.5.2          devtools_2.4.5    triebeard_0.3.0   tidyselect_1.1.2  glue_1.6.2        httpcode_0.3.0   
[37] R6_2.5.1          processx_3.7.0    fansi_1.0.3       sessioninfo_1.2.2 callr_3.7.2       purrr_0.3.4      
[43] magrittr_2.0.3    usethis_2.1.6     ps_1.7.1          promises_1.2.0.1  urltools_1.7.3    ellipsis_0.3.2   
[49] htmltools_0.5.3   assertthat_0.2.1  xtable_1.8-4      mime_0.12         httpuv_1.6.6      utf8_1.2.2       
[55] stringi_1.7.8     miniUI_0.1.1.1    cachem_1.0.6      crayon_1.5.2     

traceback()
5: stop(sprintf("%s - %s\n  %s", x$status_code, obj$err, obj$errmsg), 
       call. = FALSE)
4: err_handler(res)
3: ckan_VERB("get", url, method, body = NULL, key, query, headers, 
       opts, ...)
2: ckan_GET(url, "revision_list", key = key, opts = list(...))
1: revision_list(url = ckan2.9_url)

traceback()
5: stop(sprintf("%s - %s\n  %s", x$status_code, obj$err, obj$errmsg), 
       call. = FALSE)
4: err_handler(res)
3: ckan_VERB("get", url, method, body = NULL, key, query, headers, 
       opts, ...)
2: ckan_GET(url, "package_revision_list", list(id = id), key = key, 
       opts = list(...))
1: package_revision_list("diarias", url = ckan2.9_url)

[fjuniorr]

Currently package_search is the only function which changes it's behaviour based on the CKAN version (I discovered this through #120).

Before fixing this issue, it's a good idea to use the strategy suggested in #72 of caching the CKAN version so that we don't need to make a request on multiple function calls to check the version.