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ld.rb
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ld.rb
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# typed: strict
# frozen_string_literal: true
module OS
module Linux
# Helper functions for querying `ld` information.
#
# @api private
module Ld
sig { returns(String) }
def self.brewed_ld_so_diagnostics
brewed_ld_so = HOMEBREW_PREFIX/"lib/ld.so"
return "" unless brewed_ld_so.exist?
ld_so_output = Utils.popen_read(brewed_ld_so, "--list-diagnostics")
return "" unless $CHILD_STATUS.success?
ld_so_output
end
sig { returns(String) }
def self.sysconfdir
fallback_sysconfdir = "/etc"
match = brewed_ld_so_diagnostics.match(/path.sysconfdir="(.+)"/)
return fallback_sysconfdir unless match
match.captures.compact.first || fallback_sysconfdir
end
sig { returns(T::Array[String]) }
def self.system_dirs
dirs = []
brewed_ld_so_diagnostics.split("\n").each do |line|
match = line.match(/path.system_dirs\[0x.*\]="(.*)"/)
next unless match
dirs << match.captures.compact.first
end
dirs
end
sig { params(conf_path: T.any(Pathname, String)).returns(T::Array[String]) }
def self.library_paths(conf_path = Pathname(sysconfdir)/"ld.so.conf")
conf_file = Pathname(conf_path)
paths = Set.new
directory = conf_file.realpath.dirname
conf_file.readlines.each do |line|
# Remove comments and leading/trailing whitespace
line.strip!
line.sub!(/\s*#.*$/, "")
if line.start_with?(/\s*include\s+/)
include_path = Pathname(line.sub(/^\s*include\s+/, "")).expand_path
wildcard = include_path.absolute? ? include_path : directory/include_path
Dir.glob(wildcard.to_s).each do |include_file|
paths += library_paths(include_file)
end
elsif line.empty?
next
else
paths << line
end
end
paths.to_a
end
end
end
end