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Diffstat (limited to 'lib/bundler/templates/Executable.bundler')
-rw-r--r-- | lib/bundler/templates/Executable.bundler | 105 |
1 files changed, 105 insertions, 0 deletions
diff --git a/lib/bundler/templates/Executable.bundler b/lib/bundler/templates/Executable.bundler new file mode 100644 index 0000000000..eeda90b584 --- /dev/null +++ b/lib/bundler/templates/Executable.bundler @@ -0,0 +1,105 @@ +#!/usr/bin/env <%= Bundler.settings[:shebang] || RbConfig::CONFIG["ruby_install_name"] %> +# frozen_string_literal: true + +# +# This file was generated by Bundler. +# +# The application '<%= executable %>' is installed as part of a gem, and +# this file is here to facilitate running it. +# + +require "rubygems" + +m = Module.new do + module_function + + def invoked_as_script? + File.expand_path($0) == File.expand_path(__FILE__) + end + + def env_var_version + ENV["BUNDLER_VERSION"] + end + + def cli_arg_version + return unless invoked_as_script? # don't want to hijack other binstubs + return unless "update".start_with?(ARGV.first || " ") # must be running `bundle update` + bundler_version = nil + update_index = nil + ARGV.each_with_index do |a, i| + if update_index && update_index.succ == i && a =~ Gem::Version::ANCHORED_VERSION_PATTERN + bundler_version = a + end + next unless a =~ /\A--bundler(?:[= ](#{Gem::Version::VERSION_PATTERN}))?\z/ + bundler_version = $1 || ">= 0.a" + update_index = i + end + bundler_version + end + + def gemfile + gemfile = ENV["BUNDLE_GEMFILE"] + return gemfile if gemfile && !gemfile.empty? + + File.expand_path("../<%= relative_gemfile_path %>", __FILE__) + end + + def lockfile + lockfile = + case File.basename(gemfile) + when "gems.rb" then gemfile.sub(/\.rb$/, gemfile) + else "#{gemfile}.lock" + end + File.expand_path(lockfile) + end + + def lockfile_version + return unless File.file?(lockfile) + lockfile_contents = File.read(lockfile) + return unless lockfile_contents =~ /\n\nBUNDLED WITH\n\s{2,}(#{Gem::Version::VERSION_PATTERN})\n/ + Regexp.last_match(1) + end + + def bundler_version + @bundler_version ||= begin + env_var_version || cli_arg_version || + lockfile_version || "#{Gem::Requirement.default}.a" + end + end + + def load_bundler! + ENV["BUNDLE_GEMFILE"] ||= gemfile + + # must dup string for RG < 1.8 compatibility + activate_bundler(bundler_version.dup) + end + + def activate_bundler(bundler_version) + if Gem::Version.correct?(bundler_version) && Gem::Version.new(bundler_version).release < Gem::Version.new("2.0") + bundler_version = "< 2" + end + gem_error = activation_error_handling do + gem "bundler", bundler_version + end + return if gem_error.nil? + require_error = activation_error_handling do + require "bundler/version" + end + return if require_error.nil? && Gem::Requirement.new(bundler_version).satisfied_by?(Gem::Version.new(Bundler::VERSION)) + warn "Activating bundler (#{bundler_version}) failed:\n#{gem_error.message}\n\nTo install the version of bundler this project requires, run `gem install bundler -v '#{bundler_version}'`" + exit 42 + end + + def activation_error_handling + yield + nil + rescue StandardError, LoadError => e + e + end +end + +m.load_bundler! + +if m.invoked_as_script? + load Gem.bin_path("<%= spec.name %>", "<%= executable %>") +end |