v1.12.0.pre.1

Performance:

• speed up bundle install and bundle update by using the new compact gem index (@segiddins, @fotanus, @indirect)
• speed up bundle exec by avoiding loading the gemfile twice (#2951, #2952, @segiddins)

Features:

• add support for using version operators to specify ruby versions in the Gemfile (@jtarchie)
• redirect --help flag for plugins to that plugin's man page (@RochesterinNYC)
• support probing a mirror with a fallback timeout (#4128, @pcarranza)
• add --full-index option to bundle lock (@segiddins)
• support running with frozen string literals (@deepj, @segiddins)
• add --major and --minor options to bundle outdated (#3805, @cirdes)
• allow passing a custom ui to bundler/inline (@lamont-granquist)
• add support for ruby 2.4 (#4266, @segiddins)
• add bundle outdated --parseable for machine-readable output (@RochesterinNYC)

Bugfixes:

• fix bundle package --all recursing endlessly (#4158, @RochesterinNYC)
• fail fast on more errors when fetching remote resources (#4154, @RochesterinNYC)
• give a better error message when a given git commit can't be found (#4140, @doy)
• give a better error message when bundle clean doesn't have sufficient permissions (#4170, @RochesterinNYC)
• give a better error message when reading a bundler config file fails (@segiddins)
• restrict platforms when referencing a gemspec in the Gemfile to those defined in the gemspec (#4102, #4150, @smellsblue)
• fix bundle gem with minitest to use the correct rake task (@kotoshenya)
• give a better error message when ssl isn't available (#4054, @RochesterinNYC)
• print the original require error when Bundler.require fails (#4182, @RochesterinNYC)
• give a better error message when certain resources are temporarily unavailable (#4183, @RochesterinNYC)
• fix returning case-sensitive gem mirror URIs on ruby 2.3 (@segiddins)
• ignore colorized output from git when determining the current branch (#4056, @agis-)
• fix storing the shared gems config option as a boolean (@vassilevsky)
• add support for running bundle gem --exe instead of using the --bin option (@christhekeele)
• fix exec-ing with 0 args in a directory with spaces (#4230, @segiddins)
• avoid installing extraneous gems when resolving to an older version of a spec (#4101, #4198, @segiddins)
• ensure paths resolved when parsing a gemfile are relative to that file (#3349, @dtognazzini)
• give a better error message when encountering an invalid gemspec (#4248, #4275, @RochesterinNYC)
• preserve the original PATH in Bundler.with_clean_env (#4251, @segiddins)
• ensure standalone file paths are relative to the project root (#4144, @glennpratt)