sysreqs2.md
In pkgdepends: Package Dependency Resolution and Downloads

match

Code
  sr1
Output
  $os
  [1] "linux"

  $distribution
  [1] "ubuntu"

  $version
  [1] "22.04"

  $url
  [1] NA

  $pre_install
  [1] "apt-get -y update"

  $install_scripts
  [1] "apt-get -y install default-jdk libcurl4-openssl-dev"

  $post_install
  [1] "R CMD javareconf"

  $packages
  [1] "default-jdk"          "libcurl4-openssl-dev"

Code
  sr2
Output
  $os
  [1] "linux"

  $distribution
  [1] "debian"

  $version
  [1] "unstable"

  $url
  [1] NA

  $pre_install
  [1] "apt-get -y update"

  $install_scripts
  [1] "apt-get -y install default-jdk libcurl4-openssl-dev"

  $post_install
  [1] "R CMD javareconf"

  $packages
  [1] "default-jdk"          "libcurl4-openssl-dev"

sysreqs2_command error

Code
  sysreqs2_command("foobar-2023")
Condition
  Error:
  ! Unknown OS. Don't know how to query or install system packages for foobar-2023.

do not run update if nothing to do

Code
  sr1
Output
  $os
  [1] "linux"

  $distribution
  [1] "ubuntu"

  $version
  [1] "22.04"

  $url
  [1] NA

  $pre_install
  character(0)

  $install_scripts
  NULL

  $post_install
  NULL

  $packages
  NULL