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[ruby/prism] Use RbConfig to locate libprism and headers when it is a default gem

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* This is notably necessary on TruffleRuby, which is updating to Ruby 3.3 which introduces Prism as a default gem.
* Using the existing path is not an option as it would end up in truffleruby/lib/build/libprism.so and
  "truffleruby/lib/include/#{header}" which are not good places for such files.

https://github.com/ruby/prism/commit/5d16473e69
This commit is contained in:
Benoit Daloze 2024-11-10 15:00:55 +01:00 committed by git
parent eca3680c27
commit 6c123649cd
1 changed files with 10 additions and 2 deletions
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12
lib/prism/ffi.rb
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@ -13,7 +13,15 @@ module Prism
# Define the library that we will be pulling functions from. Note that this
# must align with the build shared library from make/rake.
ffi_lib File.expand_path("../../build/libprism.#{RbConfig::CONFIG["SOEXT"]}", __dir__)
libprism_in_build = File.expand_path("../../build/libprism.#{RbConfig::CONFIG["SOEXT"]}", __dir__)
libprism_in_libdir = "#{RbConfig::CONFIG["libdir"]}/prism/libprism.#{RbConfig::CONFIG["SOEXT"]}"
if File.exist? libprism_in_build
INCLUDE_DIR = File.expand_path("../../include", __dir__)
ffi_lib libprism_in_build
else
INCLUDE_DIR = "#{RbConfig::CONFIG["libdir"]}/prism/include"
ffi_lib libprism_in_libdir
end
# Convert a native C type declaration into a symbol that FFI understands.
# For example:
@ -38,7 +46,7 @@ module Prism
# given functions. For each one, define a function with the same name and
# signature as the C function.
def self.load_exported_functions_from(header, *functions, callbacks)
File.foreach(File.expand_path("../../include/#{header}", __dir__)) do |line|
File.foreach("#{INCLUDE_DIR}/#{header}") do |line|
# We only want to attempt to load exported functions.
next unless line.start_with?("PRISM_EXPORTED_FUNCTION ")