Mirror of forum.nim-lang.org

2062 :: access command line at compile time

• adrianv (orginal) [2016-02-23T10:59:00+01:00] view original

  Hi,

  is there a way to access the command line (in a macro) that was used to compile the program ?

  Since I am only interested in the defined params, is there a way to see all the defines at compile time in order to iterate over them ?

  thanks, Adrian.

---

• def (orginal) [2016-02-23T15:21:37+01:00] view original

  I don't think that should be done by accessing the command line. These defines can also be set by a config. I guess it would be best to enumerate the possible defines in your code.

---

• OderWat (orginal) [2016-02-23T16:09:36+01:00] view original

  What @def said.

  Being curious how to add the command line as information to an executable I quickly came up with this:

  # file: compiled_with.nims
  #
  # proof of concept for embedding the command line into the executable
  
  var cmdline=""
  for i in 0..paramCount():
    cmdline.add paramStr(i)
    cmdline.add ' '
  
  # no other way to "share data" with the compiler?
  
  exec("echo '" & cmdline & "' > cmdline.tmp") # no write file for NimScript?
  
  setCommand("c")
  Run

  # file: compiled_with.nim
  #
  # just a prove of concept! will break easily :)
  
  const cmdline = staticRead("cmdline.tmp")
  
  echo "I was compiled with: ", cmdline
  Run

  Thats pretty ugly but "works" :)

---

• adrianv (orginal) [2016-02-24T10:10:11+01:00] view original

  I was thinking about the workaround with .nims already, but was looking for a nicer way. Thanks.

---