local computer=require("computer")
local fs=require("filesystem")
local shell=require("shell")
local lib={}

function lib.locate(path)
for _,lookup in ipairs(computer.getProgramLocations())do
if lookup[1]==path then
return lookup[2]
end
end
end

function lib.reportNotFound(path,reason)
checkArg(1,path,"string")
if fs.isDirectory(shell.resolve(path))then
io.stderr:write(path..": is a directory\n")
return 126
end
local loot=lib.locate(path)
if loot then
io.stderr:write("The program '"..path.."' is currently not installed.  To install it:\n"..
"1. Craft the '"..loot.."' floppy disk and insert it into this computer.\n"..
"2. Run `install "..loot.."`")
elseif type(reason)=="string"then
io.stderr:write(path..": "..reason.."\n")
end
return 127
end

return lib