where __rvm_sed command defined

Question

I am reading the source code for RVM(RVM), which uses the command __rvm_sed, but I cannot find a definition of __rvm_sed in the source code. Can someone help with that?

Answer 1

After peeking at the source code on Gitlab, it looks like __rvm_sed is defined in the file scripts/functions/support:

line
 281  __rvm_setup_utils_functions

line
 175  __rvm_setup_utils_functions()
 176  {
 177    \typeset gnu_tools_path gnu_prefix gnu_util
 178    \typeset -a gnu_utils gnu_missing
 179    gnu_utils=( awk cp date find sed tail tar xargs )
 180    gnu_missing=()
 181  
 182    if is_a_function __rvm_setup_utils_functions_${_system_name}
 183    then __rvm_setup_utils_functions_${_system_name} "$@" || return $?
 184    else __rvm_setup_utils_functions_Other "$@" || return $?
 185    fi
 186  }

---

_system_name is (seemingly) defined in scripts/functions/detect/system, and can take one of the following values:

• "unknown"
• "Arch"
• "SuSE"
• "Devuan"
• "Sabayon"
• "Gentoo"
• "Arch"
• "Fedora"
• "Oracle"
• "CentOS"
• "Debian"
• "Synology"
• "Termux"
• "Solaris"
• "SmartOS"
• "OmniOS"
• "OpenIndiana"
• "FreeBSD"
• "OpenBSD"
• "DragonFly"
• "NetBSD"
• "OSX"
• "Cygwin"
• "Mingw"

---

So the script will try to invoke __rvm_setup_utils_functions_${_system_name} if that function exists, or fallback to __rvm_setup_utils_functions_Other "$@" ...

line
 252  __rvm_setup_utils_functions_Other()
 253  {
 254    __rvm_stat() { \command \stat "$@" || return $?; }
 255    __rvm_setup_utils_functions_common
 256  }

... which in turn invokes __rvm_setup_utils_functions_common:

line
 258  __rvm_setup_utils_functions_common()
 259  {
      (... snip ...)
 276    for gnu_util in "${gnu_utils[@]}"
 277    do eval "__rvm_$gnu_util() { \\$gnu_util \"\$@\" || return \$?; }"
 278    done
 279  }

So when $gnu_util is sed, function __rvm_sed() is { \sed "$@" || return $?; }

Hope that helps.