Sha256: 210f82d9774a9bc224e7b9cb29462abcaaf0c5badf2b662c5a1a9690f5169ae7
Contents?: true
Size: 1.42 KB
Versions: 20
Compression:
Stored size: 1.42 KB
Contents
module Prometheus
module Client
module Helper
module Loader
class << self
def rust_impl_available?
return @rust_available unless @rust_available.nil?
check_for_rust
end
private
def load_rust_extension
begin
ruby_version = /(\d+\.\d+)/.match(RUBY_VERSION)
require_relative "../../../#{ruby_version}/fast_mmaped_file_rs"
rescue LoadError
require 'fast_mmaped_file_rs'
end
end
def check_for_rust
# This will be evaluated on each invocation even with `||=` if
# `@rust_available` if false. Running a `require` statement is slow,
# so the `rust_impl_available?` method memoizes the result, external
# callers can only trigger this method a single time.
@rust_available = begin
load_rust_extension
true
rescue LoadError
warn <<~WARN
WARNING: The Rust extension for prometheus-client-mmap is unavailable, falling back to the legacy C extension.
The Rust extension will be required in the next version. If you are compiling this gem from source,
ensure your build system has a Rust compiler and clang: https://gitlab.com/gitlab-org/ruby/gems/prometheus-client-mmap
WARN
false
end
end
end
end
end
end
end
Version data entries
20 entries across 20 versions & 1 rubygems