summaryrefslogtreecommitdiffstats
path: root/lib/importenv.rb
blob: 435d6f972acc3c4173ced18d4e3db767b43a31c5 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
# importenv.rb -- imports environment variables as global variables, Perlish ;(
#
# Usage:
#
#  require 'importenv'
#  p $USER
#  $USER = "matz"
#  p ENV["USER"]

for k,v in ENV
  next unless /^[a-zA-Z][_a-zA-Z0-9]*/ =~ k
  eval <<EOS
  $#{k} = v
  trace_var "$#{k}", proc{|v|
    ENV[%q!#{k}!] = v
    $#{k} = v
    if v == nil
      untrace_var "$#{k}"
    end
  }
EOS
end

if __FILE__ == $0
  p $TERM
  $TERM = nil
  p $TERM
  p ENV["TERM"]
  $TERM = "foo"
  p ENV["TERM"]
end