Undefined method error

Ruby
1

so im trying to compile a bot for a video game and it gives me undefined
method error for a certain script and i have no idea who to fix it.

im getting this build_tools/process_files.rb:70:in generate_version': undefined method[]’ for nil:NilClass (NoMethodError)
from build_tools/process_files.rb:61:in generate_build_information' from build_tools/process_files.rb:142:inblock in ’
from build_tools/process_files.rb:55:in initialize' from build_tools/process_files.rb:139:innew’
from build_tools/process_files.rb:139:in `’
build_tools/process_files.rb Starting…
Command /bin/sh failed with exit code 1

the piece of code is

def generate_version
game_version =
(@build_information[:kind] == “CVS”) ?
%x("#{TOP_LEVEL}/batch/make/version"
“#{TOP_LEVEL}”).chomp :
File.read("#{TOP_LEVEL}/src/macosx/config_common.h.in").scan(/"#define
VERSION “(.*)”/)[0][0]
@build_information[:version]
= game_version
end

if anyone could help that was be awesome.

2

You didn’t posted where is the row Nr. 70 but from the code I’d suspect
the issue is with @build_information instance variable is not
initialized - ie its value is nil, therefore sending `[]’ method fails
with exception.

3

oh sorry line 70 is
File.read("#{TOP_LEVEL}/src/macosx/config_common.h.in").scan(/"#define
VERSION “(.*)”/)[0][0]

4

So it’s clear now. File /src/macosx/config_common.h.in does
not contain expected pattern "#define VERSION “(.*)” .

First I’d make sure whether all double-quotes in /"#define VERSION
“(.*)”/ are correct. I’d bet the first one before #define is accidental
and may need to be removed.
Second open the `common.h.in’ file in an editor and look for a row
containing VERSION macro definition and check the current format and
adjust the regexp pattern accordingly. If in troubles you may paste the
corresponding line here.

5

Test the output of this:
File.read("#{TOP_LEVEL}/src/macosx/config_common.h.in").scan(/"#define
VERSION “(.*)”/)

It looks like it isn’t finding any matches, so when you try to access
the object in index zero with [0][0], it tells you that #[] is not
defined on NilClass, because there’s nothing in the array.