4 replies to this topic

[LoganDark]

I want to use shell.run to run a program that may not exist, and I have my own error message that I want to display instead of "No such program". Is that possible?

Edited by LoganDark, 18 June 2016 - 01:00 AM.

[theoriginalbit]

Error handling and Exceptions over at the Lua manual will point you in the direction of pcall.

It would go a little like this

local ok, err = pcall(function() shell.run("program") end)

if not ok then
  print("No program")
end

Edited by theoriginalbit, 18 June 2016 - 12:55 AM.

[LoganDark]

theoriginalbit, on 18 June 2016 - 12:55 AM, said:

Error handling and Exceptions over at the Lua manual will point you in the direction of pcall.

It would go a little like this

local ok, err = pcall(function() shell.run("program") end)

if not ok then
  print("No program")
end

Okay, thanks. I forgot about pcall.

[Bomb Bloke]

shell.run() doesn't actually error if the targeted file doesn't exist. You'd be better off using fs.exists() to check before attempting to run in the first place.

[LoganDark]

Bomb Bloke, on 18 June 2016 - 01:16 AM, said:

shell.run() doesn't actually error if the targeted file doesn't exist. You'd be better off using fs.exists() to check before attempting to run in the first place.

Oh, okay.

Edit: So fs.combine shell.dir() and what to run?

Edit 2: I guess that's a yes

Edited by LoganDark, 18 June 2016 - 01:25 AM.