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-rw-r--r--ext/psych/extconf.rb14
1 files changed, 10 insertions, 4 deletions
diff --git a/ext/psych/extconf.rb b/ext/psych/extconf.rb
index 795a050..b9cd120 100644
--- a/ext/psych/extconf.rb
+++ b/ext/psych/extconf.rb
@@ -19,10 +19,16 @@ if yaml_source == true
# search the latest libyaml source under $srcdir
yaml_source = Dir.glob("#{$srcdir}/yaml{,-*}/").max_by {|n| File.basename(n).scan(/\d+/).map(&:to_i)}
unless yaml_source
- require_relative '../../tool/extlibs.rb'
- extlibs = ExtLibs.new(cache_dir: File.expand_path("../../tmp/download_cache", $srcdir))
- unless extlibs.process_under($srcdir)
- raise "failed to download libyaml source"
+ download_failure = "failed to download libyaml source"
+ begin
+ require_relative '../../tool/extlibs.rb'
+ extlibs = ExtLibs.new(cache_dir: File.expand_path("../../tmp/download_cache", $srcdir))
+ unless extlibs.process_under($srcdir)
+ raise download_failure
+ end
+ rescue
+ # Implicitly captures Exception#cause. Newer rubies show it in the backtrace.
+ raise download_failure
end
yaml_source, = Dir.glob("#{$srcdir}/yaml-*/")
raise "libyaml not found" unless yaml_source