[ruby-core:50766] [ruby-trunk - Bug #7541] Can't use Ruby 2.0.0 as as BASERUBY

Issue #7541 has been updated by naruse (Yui NARUSE).


vo.x (Vit Ondruch) wrote:
> naruse (Yui NARUSE) wrote:
> > Those patch don't fit this issue because ruby 2.0 still can't be use for BASERUBY of Ruby 1.9.3 or prior.
> 
> I still don't understand what is the issue, why older ruby works and 2.0 does not work. So keep the '-I.' and add '--disable-gems' could fix the issues as well.

RubyGems uses the information in rbconfig.rb like RbConfig::CONFIG["libdir"].
Previous gems works even if RbConfig::CONFIG["libdir"] is nil,
but the one bundled with 2.0 raises exception.
So 2.0 doesn't work.

-I is not acceptable because it doesn't load correct rbconfig.rb.
--disable-gems is not acceptable because it doesn't work for 1.8.
----------------------------------------
Bug #7541: Can't use Ruby 2.0.0 as as BASERUBY
https://bugs.ruby-lang.org/issues/7541#change-34617

Author: vo.x (Vit Ondruch)
Status: Assigned
Priority: Normal
Assignee: drbrain (Eric Hodel)
Category: 
Target version: 
ruby -v: ruby 2.0.0dev (2012-12-04 trunk 38184) [x86_64-linux]


=begin

I am trying to prepare source archive using

 tool/make-snapshot tmp

With Ruby 2.0.0 rev38184 as as BASERUBY, however with no luck:

 snip

 ...

 extracting ripper.y from ../../parse.y
 ruby ../../tool/id2token.rb --vpath=../.. id.h ../../parse.y > ripper.tmp.y
 ruby ./tools/preproc.rb ripper.tmp.y --output=ripper.y
 rm -f ripper.tmp.y
 compiling compiler ripper.y
 bison -t -v -oy.tab.c ripper.y
 sed -f ../../tool/ytab.sed -e "/^#/s!y\.tab\.c!ripper.c!" y.tab.c > ripper.c
 generating eventids1.c from ../../parse.y
 ruby ./tools/generate.rb --mode=eventids1 --ids1src=../../parse.y --output=eventids1.c
 generating eventids2table.c from ./eventids2.c
 ruby ./tools/generate.rb --mode=eventids2table --ids2src=./eventids2.c --output=eventids2table.c
 make[1]: Leaving directory `/tmp/ruby-snapshot20121210-11545-1p4tbw0/ruby-2.0.0-r38296/ext/ripper'
 generating miniprelude.c
 ruby -I. ./tool/compile_prelude.rb ./prelude.rb miniprelude.c
 /usr/share/rubygems/rubygems/defaults.rb:43:in `join': can't convert nil into String (TypeError)
 	from /usr/share/rubygems/rubygems/defaults.rb:43:in `default_dir'
 	from /usr/share/rubygems/rubygems/specification.rb:621:in `default_specifications_dir'
 	from /usr/share/rubygems/rubygems/specification.rb:637:in `each_default'
 	from /usr/share/rubygems/rubygems/specification.rb:678:in `load_defaults'
 	from /usr/share/rubygems/rubygems.rb:1088:in `<top (required)>'
 	from <internal:gem_prelude>:1:in `require'
 	from <internal:gem_prelude>:1:in `<compiled>'
 make: *** [miniprelude.c] Error 1
 prerequisites failed

It seems that the `ruby -I. ./tool/compile_prelude.rb ./prelude.rb miniprelude.c` command is executed from the temporary directory with fresh sources. However, since there is added current directory '.' into the load path, the rbconfig.rb available there gets precedence instead of the rbconfig.rb of BASERUBY. Unfortunately, that rbconfig.rb contains just some rubbish.

The attached patch might fix the issue, but I am not sure what it breaks, since the original commit message introducing this flag (r14271) is not overly descriptive :/ 


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