Couldn't find Nim version

[andreaferretti]

I have installed Nim on Ubuntu 15.04 using the instructions on the Nim Github page (i.e. using Koch, and then adding $NIMHOME/bin to the $PATH).

I am now trying to install nimble, but when I do nim c -r src/nimble install, the process fails with Couldn't find Nim version..

Apparently, the issue stems from the fact that running osproc.execCmdEx("nim -v") fails with

(output: /bin/sh: 1: nim: not found
, exitCode: 127)

I am not sure how to fix this, as the nim command is certainly in the $PATH (and in fact nim -v works correctly in the same shell).

[dom96]

What happens when you execute which nim?

[dom96]

Nimble actually uses findExe to find the path to the Nim executable. Try it and see what it returns.

[andreaferretti]

When I do which nim, I do not find anything. I have tried

import os, osproc

echo findExe("nim")

and it prints /home/papillon/tools/Nim/bin/nim, as expected. If then I try

import os, osproc

echo execCmdEx("nim -v")
echo execCmdEx("/home/papillon/tools/Nim/bin/nim -v")

the second command prints the expected output, but the first one fails with

(output: /bin/sh: 1: nim: not found
, exitCode: 127)

as I remarked above. It seems that the issue is that nimble finds the correct path for the nim executable, but then tries to start nim without the full path

[andreaferretti]

This seems the issue:

proc getNimBin*: string =
  result = "nim"
  if findExe("nim") != "": result = "nim"
  elif findExe("nimrod") != "": result = "nimrod"

Instead it should return whatever findExe returns. If I change this to

proc getNimBin*: string =
  result = "nim"
  let exe = findExe("nim")
  if exe != "": result = exe
  elif findExe("nimrod") != "": result = "nimrod"

the installation proceeds correctly

[HOLYCOWBATMAN]

Same thing happened when i tried to install nimble in a vagrant box ubuntu 14.04 today. Using the result of findExe("nim") instead of "nim" fixed it.