New version released of Stack, a build tool.

See README for installation and upgrade instructions.

Major changes:

• “stack setup” now supports building and booting GHCJS from source tarball.
• On Windows, build directories no longer display “pretty” information
  (like x86_64-windows/Cabal-1.22.4.0), but rather a hash of that
  content. The reason is to avoid the 260 character path limitation on
  Windows. See
  #1027
• Rename config files and clarify their purposes #969
  • ~/.stack/stack.yaml → ~/.stack/config.yaml
  • ~/.stack/global → ~/.stack/global-project
  • /etc/stack/config → /etc/stack/config.yaml
  • Old locations still supported, with deprecation warnings
• New command “stack eval CODE”, which evaluates to “stack exec ghc — -e CODE”.

Other enhancements:

• No longer install git on Windows
  #1046. You
  can still get this behavior by running the following yourself:
  stack exec -- pacman -Sy --noconfirm git.
• Typing enter during —file-watch triggers a rebuild #1023
• Use Haddock’s --hyperlinked-source (crosslinked source), if available #1070
• Use Stack-installed GHCs for stack init --solver #1072
• New experimental stack query command #1087
• By default, stack no longer rebuilds a package due to GHC options changes. This behavior can be tweaked with the rebuild-ghc-options setting. #1089
• By default, ghc-options are applied to all local packages, not just targets. This behavior can be tweaked with the apply-ghc-options setting. #1089
• Docker: download or override location of stack executable to re-run in container #974
• Docker: when Docker Engine is remote, don’t run containerized processes as host’s UID/GID #194
• Docker: set-user option to enable/disable running containerized processes as host’s UID/GID #194
• Custom Setup.hs files are now precompiled instead of interpreted. This should be a major performance win for certain edge cases (biggest example: building Cabal itself) while being either neutral or a minor slowdown for more common cases.
• stack test --coverage now also generates a unified coverage report for multiple test-suites / packages. In the unified report, test-suites can contribute to the coverage of other packages.

Bug fixes:

• Ignore stack-built executables named ghc
  #1052
• Fix quoting of output failed command line arguments
• Mark executable-only packages as installed when copied from cache #1043
• Canonicalize temporary directory paths #1047
• Put code page fix inside the build function itself #1066
• Add explicit-setup-deps option #1110, and change the default to the old behavior of using any package in the global and snapshot database #1025
• Precompiled cache checks full package IDs on Cabal < 1.22 #1103
• Pass -package-id to ghci #867
• Ignore global packages when copying precompiled packages #1146