Is there a way to do this?
$ ruby -rrubygems -rfacets -e ‘3’
ruby: no such file to load – facets (LoadError)
Also is there a way to do something like
$ ruby -e ‘initialization code’ filename.rb
?
Thanks!
-=r
Roger P. wrote:
Is there a way to do this?
$ ruby -rrubygems -rfacets -e ‘3’
ruby: no such file to load – facets (LoadError)
Seems this is a gems quirk of some type.
Also is there a way to do something like
$ ruby -e ‘initialization code’ filename.rb
As per Nobu’s advice.
ruby -e ‘some pre init stuff; load($0 = ARGV.shift)’ filename.rb
Something like that.
Thanks!
-=r
Roger P. wrote:
Roger P. wrote:
Is there a way to do this?
$ ruby -rrubygems -rfacets -e ‘3’
ruby: no such file to load – facets (LoadError)Seems this is a gems quirk of some type.
Also is there a way to do something like
$ ruby -e ‘initialization code’ filename.rbAs per Nobu’s advice.
ruby -e ‘some pre init stuff; load($0 = ARGV.shift)’ filename.rb
That doesn’t work for me:
r1test.rb
puts “hello”
puts x
$ ruby -e ‘x=10; load($0 = ARGV.shift)’ r1test.rb
hello
./r1test.rb:2: undefined local variable or method x' for main:Object (NameError) from -e:1:inload’
from -e:1
…and this does nothing:
$ ruby -e ‘x=10;’ r1test.rb
$
Hi,
At Sat, 14 Feb 2009 15:09:46 +0900,
7stud – wrote in [ruby-talk:328177]:
That doesn’t work for me:
r1test.rb
puts “hello”
puts x
require separates the scope, so local variables defined outside
are not accessible.
$ ruby -e ‘x=10; eval(File.read($0 = ARGV.shift), binding)’ r1test.rb
hello
10
Nobuyoshi N. wrote:
Hi,
At Sat, 14 Feb 2009 15:09:46 +0900,
7stud – wrote in [ruby-talk:328177]:That doesn’t work for me:
r1test.rb
puts “hello”
puts xrequire separates the scope, so local variables defined outside
are not accessible.
- require? Where, what, when?
$ ruby -e ‘x=10; eval(File.read($0 = ARGV.shift), binding)’ r1test.rb
hello
10
-
Isn’t specifying ‘binding’ redundant unless you acquire a binding
from a different scope? -
Why the $0 = ARGV.shift ? This appears to work the same way:
$ ruby -e ‘x=10; eval(File.read(ARGV[0]) )’ r1test.rb
7stud – wrote:
…and this does nothing:
$ ruby -e ‘x=10;’ r1test.rb
$
- Why does that do nothing? Here is another example:
r1test.rb
puts “world”
$ ruby -e ‘puts “hello”’ r1test.rb
hello
$
I expected the output to be:
$ ruby -e ‘puts “hello”’ r1test.rb
hello
world
$
According to pickaxe2, p 177-178:
A ruby command line consists of three parts: options to the Ruby
interpreter, optionally the name of the program to run, and optionally a
set of arguments for that program.
ruby [options] [–] [programfile] [arguments]
Command-Line Options
-e ‘command’
If programfile is omitted when -e is present, execution stops after the
-e commands have been run.
To me that implies that if programfile is present, then programfile will
execute after the -e commands.
Hi,
At Sat, 14 Feb 2009 16:52:12 +0900,
7stud – wrote in [ruby-talk:328185]:
require separates the scope, so local variables defined outside
are not accessible.
- require? Where, what, when?
Sorry, it was load.
$ ruby -e ‘x=10; eval(File.read($0 = ARGV.shift), binding)’ r1test.rb
hello
10
- Isn’t specifying ‘binding’ redundant unless you acquire a binding
from a different scope?
Just for explanation.
- Why the $0 = ARGV.shift ? This appears to work the same way:
$ ruby -e ‘x=10; eval(File.read(ARGV[0]) )’ r1test.rb
For the idiom, if $0 == FILE.
If programfile is omitted when -e is present, execution stops after the
-e commands have been run.To me that implies that if programfile is present, then programfile will
execute after the -e commands.
Yeah pickaxe is wrong there, I’m thinking 
The good news is that it’s still possible [as seen in previous posts in
the thread]. I suppose if you wanted to you could create a “wrapper”
for ruby that smartly understood what one meant with
-e ‘stuff’ programfile.rb
I was just curious if it was possible, having wanted to do it a few
times.
Thanks all.
-=r