v1.2.0

See https://haskellstack.org for installation and upgrade instructions.

Release notes:

• On many Un*x systems, Stack can now be installed with a simple
  one-liner:

    wget -qO- https://get.haskellstack.org/ | sh
  

• The fix for
  #2175
  entails that stack must perform a full clone of a large Git repo of
  Hackage meta-information. The total download size is about 200 MB.
  Please be aware of this when upgrading your stack installation.

• If you use Mac OS X, you may want to delay upgrading to macOS Sierra as there
  are reports of GHC panics when building some packages (including Stack
  itself). See #2577

• This version of Stack does not build on ARM or PowerPC systems (see
  store#37). Please stay with
  version 1.1.2 for now on those architectures. This will be rectified soon!

• We are now releasing a
  statically linked Stack binary for 64-bit Linux.
  Please try it and let us know if you run into any trouble on your platform.

• We are planning some changes to our Linux releases, including dropping our
  Ubuntu, Debian, CentOS, and Fedora package repositories and switching to
  statically linked binaries. We would value your feedback in
  #2534.

Major changes:

• Add stack hoogle command.
  #55
• Support for absolute file path in url field of setup-info or --ghc-bindist
• Add support for rendering GHCi scripts targeting different GHCi like
  applications
  #2457

Behavior changes:

• Remove stack ide start and stack ide load-targets commands.
  #2178
• Support .buildinfo files in stack ghci.
  #2242
• Support -ferror-spans syntax in GHC error messages.
• Avoid unpacking ghc to /tmp
  #996
• The Linux gmp4 GHC bindist is no longer considered a full-fledged GHC
  variant and can no longer be specified using the ghc-variant option,
  and instead is treated more like a slightly different platform.

Other enhancements:

• Use the store package for binary serialization of most caches.
• Only require minor version match for Docker stack exe.
  This way, we can make patch releases for version bounds and similar
  build issues without needing to upload new binaries for Docker.
• Stack/Nix: Passes the right ghc derivation as an argument to the shell.nix when a
  custom shell.nix is used
  See #2243
• Stack/Nix: Sets LD_LIBRARY_PATH so packages using C libs for Template Haskell can work
  (See e.g. this HaskellR issue)
• Parse CLI arguments and configuration files into less permissive types,
  improving error messages for bad inputs.
  #2267
• Add the ability to explictly specify a gcc executable.
  #593
• Nix: No longer uses LTS mirroring in nixpkgs. Gives to nix-shell a derivation
  like haskell.compiler.ghc801
  See #2259
• Perform some subprocesses during setup concurrently, slightly speeding up most
  commands. #2346
• stack setup no longer unpacks to the system temp dir on posix systems.
  #996
• stack setup detects libtinfo6 and ncurses6 and can download alternate GHC
  bindists #257
  #2302.
• stack setup detects Linux ARMv7 downloads appropriate GHC bindist
  #2103
• Custom stack binaries list dependency versions in output for --version.
  See #2222
  and #2450.
• Use a pretty printer to output dependency resolution errors.
  #1912
• Remove the --os flag
  #2227
• Add 'netbase' and 'ca-certificates' as dependency for .deb packages.
  #2293.
• Add stack ide targets command.
• Enhance debug logging with subprocess timings.
• Pretty-print YAML parse errors
  #2374
• Clarify confusing stack setup output
  #2314
• Delete Stack.Types multimodule to improve build times
  #2405
• Remove spurious newlines in build logs
  #2418
• Interpreter: Provide a way to hide implicit packages
  #1208
• Check executability in exec lookup
  #2489

Bug fixes:

• Fix cabal warning about use of a deprecated cabal flag
  #2350
• Support most executable extensions on Windows
  #2225
• Detect resolver change in stack solver
  #2252
• Fix a bug in docker image creation where the wrong base image was
  selected
  #2376
• Ignore special entries when unpacking tarballs
  #2361
• Fixes src directory pollution of style.css and highlight.js with GHC 8's
  haddock #2429
• Handle filepaths with spaces in stack ghci
  #2266
• Apply ghc-options to snapshot packages
  #2289
• stack sdist: Fix timestamp in tarball
  #2394
• Allow global Stack arguments with a script
  #2316
• Inconsistency between ToJSON and FromJSON instances of PackageLocation
  #2412
• Perform Unicode normalization on filepaths
  #1810
• Solver: always keep ghc wired-in as hard constraints
  #2453
• Support OpenBSD's tar where possible, require GNU tar for xz support
  #2283
• Fix using --coverage with Cabal-1.24
  #2424
• When marking exe installed, remove old version
  #2373
• Stop truncating all-cabal-hashes git repo
  #2175
• Handle non-ASCII filenames on Windows
  #2491
• Avoid using multiple versions of a package in script interpreter
  by passing package-id to ghc/runghc
  #1957
• Only pre-load compiler version when using nix integration
  #2459
• Solver: parse cabal errors also on Windows
  #2502
• Allow exec and ghci commands in interpreter mode.
  Scripts can now automatically open in the repl by using exec ghci
  instead of runghc in the shebang command.
  #2510
• Now consider a package to be dirty when an extra-source-file is changed.
  See #2040

Thanks to all our contributors for this release:

• Aaron Friel
• Andrew Cowie
• AndrewRademacher
• Anton Felix Lorenzen
• Brian McKenna
• Chris Done
• Dan Aloni
• danald
• Daniel Casanueva
• Denis
• Denis Kasak
• Emanuel Borsboom
• erewok
• Gabor Greif
• Gurkenglas
• Harendra Kumar
• hesiod
• Judah Jacobson
• Khan Thompson
• Mathieu Boespflug
• Michael Sloan
• Michael Snoyman
• Mohit Agarwal
• Moritz Angermann
• Oleg Grenrus
• Paolo G. Giarrusso
• Philipp Kant
• Ryan Desfosses
• Sid Kapur
• Sidharth Kapur
• Simon Jakobi
• Tim Dysinger
• Tim Düsterhus
• Tobias Markus
• YPares
• Yuriy Syrovetskiy
• Yves Parès (Ywen)

• ---

v1.1.2

See haskellstack.org for installation and upgrade instructions.

Release notes:

• Official FreeBSD binaries are
  now available
  (#1253).

Major changes:

• Extensible custom snapshots implemented. These allow you to define snapshots
  which extend other snapshots. See
  #863. Local file custom
  snapshots can now be safely updated without changing their name. Remote custom
  snapshots should still be treated as immutable.

Behavior changes:

• stack path --compiler was added in the last release, to yield a path to the
  compiler. Unfortunately, --compiler is a global option that is useful to use
  with stack path. The same functionality is now provided by stack path --compiler-exe. See
  #2123
• For packages specified in terms of a git or hg repo, the hash used in the
  location has changed. This means that existing downloads from older stack
  versions won't be used. This is a side-effect of the fix to
  #2133
• stack upgrade no longer pays attention to local stack.yaml files, just the
  global config and CLI options.
  #1392
• stack ghci now uses :add instead of :load, making it potentially work
  better with user scripts. See
  #1888

Other enhancements:

• Grab Cabal files via Git SHA to avoid regressions from Hackage revisions
  #2070
• Custom snapshots now support ghc-options.
• Package git repos are now re-used rather than re-cloned. See
  #1620
• DESTDIR is filtered from environment when installing GHC. See
  #1460
• stack haddock now supports --hadock-arguments. See
  #2144
• Signing: warn if GPG_TTY is not set as per man gpg-agent

Bug fixes:

• Now ignore project config when doing stack init or stack new. See
  #2110
• Packages specified by git repo can now have submodules. See
  #2133
• Fix of hackage index fetch retry. See re-opening of
  #1418
• HPack now picks up changes to filesystem other than package.yaml. See
  #2051
• "stack solver" no longer suggests --omit-packages. See
  #2031
• Fixed an issue with building Cabal's Setup.hs. See
  #1356
• Package dirtiness now pays attention to deleted files. See
  #1841
• stack ghci now uses extra-lib-dirs and extra-include-dirs. See
  #1656
• Relative paths outside of source dir added via qAddDependentFile are now
  checked for dirtiness. See
  #1982
• Signing: always use --with-fingerprints

---

Thanks to all our contributors for this release:

• Benno Fünfstück @bennofs
• Emanuel Borsboom @borsboom
• Levi Notik @levinotik
• Michael Sloan @mgsloan
• Michael Snoyman @snoyberg
• Oleg Grenrus @phadej
• Sebastian Graf @sgraf812
• Simon Jakobi @sjakobi
• Tim Dysinger @dysinger
• Yann Esposito @yogsototh
• Yuji Yamamoto @igrep

And thanks also to the 150+ contributors to past releases!

v1.1.0

See haskellstack.org for installation and upgrade instructions.

Release notes:

• Added Ubuntu 16.04 LTS (xenial) Apt repo.
• No longer uploading new versions to Fedora 21 repo.

Behavior changes:

• Snapshot packages are no longer built with executable profiling. See
  #1179.
• stack init now ignores symlinks when searching for cabal files. It also now
  ignores any directory that begins with . (as well as dist dirs) - before
  it would only ignore .git, .stack-work, and dist.
• The stack executable is no longer built with -rtsopts. Before, when
  -rtsopts was enabled, stack would process +RTS options even when intended
  for some other program, such as when used with stack exec -- prog +RTS.
  See #2022.
• The stack path --ghc-paths option is deprecated and renamed to --programs.
  --compiler is added, which points directly at the compiler used in
  the current project. --compiler-bin points to the compiler's bin dir.
• For consistency with the $STACK_ROOT environment variable, the
  stack path --global-stack-root flag and the global-stack-root field
  in the output of stack path are being deprecated and replaced with the
  stack-root flag and output field.
  Additionally, the stack root can now be specified via the
  --stack-root command-line flag. See
  #1148.
• stack sig GPG-related sub-commands were removed (folded into upload and
  sdist)
• GPG signing of packages while uploading to Hackage is now the default. Use
  upload --no-signature if you would rather not contribute your package
  signature. If you don't yet have a GPG keyset, read this
  blog post on GPG keys.
  We can add a stack.yaml config setting to disable signing if some people
  desire it. We hope that people will sign. Later we will be adding GPG
  signature verification options.
• stack build pkg-1.2.3 will now build even if the snapshot has a different
  package version - it is treated as an extra-dep. stack build local-pkg-1.2.3
  is an error even if the version number matches the local package
  #2028.
• Having a nix: section no longer implies enabling nix build. This allows the
  user to globally configure whether nix is used (unless the project overrides
  the default explicitly). See
  #1924.
• Remove deprecated valid-wanted field.
• Docker: mount home directory in container #1949.
• Deprecate --local-bin-path instead --local-bin.
• stack image: allow absolute source paths for add.

Other enhancements:

• stack haddock --open [PACKAGE] opens the local haddocks in the browser.
• Fix too much rebuilding when enabling/disabling profiling flags.
• stack build pkg-1.0 will now build pkg-1.0 even if the snapshot specifies
  a different version (it introduces a temporary extra-dep)
• Experimental support for --split-objs added
  #1284.
• git packages with submodules are supported by passing the --recursive
  flag to git clone.
• When using hpack, only regenerate cabal files
  when hpack files change.
• hpack files can now be used in templates
• stack ghci now runs ghci as a separate process
  #1306
• Retry when downloading snapshots and package indices
• Many build options are configurable now in stack.yaml:

  build:
    library-profiling: true
    executable-profiling: true
    haddock: true
    haddock-deps: true
    copy-bins: true
    prefetch: true
    force-dirty: true
    keep-going: true
    test: true
    test-arguments:
      rerun-tests: true
      additional-args: ['-fprof']
      coverage: true
      no-run-tests: true
    bench: true
    benchmark-opts:
      benchmark-arguments: -O2
      no-run-benchmarks: true
    reconfigure: true
    cabal-verbose: true

• A number of URLs are now configurable, useful for firewalls. See
  #1794.
• Suggest causes when executables are missing.
• Allow --omit-packages even without --solver.
• Improve the generated stack.yaml.
• Improve ghci results after :load Main module collision with main file path.
• Only load the hackage index if necessary
  #1883, #1892.
• init: allow local packages to be deps of deps
  #1965.
• Always use full fingerprints from GPG
  #1952.
• Default to using gpg2 and fall back to gpg
  #1976.
• Add a flag for --verbosity silent.
• Add haddock --open flag #1396.

Bug fixes:

• Package tarballs would fail to unpack.
  #1884.
• Fixed errant warnings about missing modules, after deleted and removed from
  cabal file #921
  #1805.
• Now considers a package to dirty when the hpack file is changed
  #1819.
• Nix: cancelling a stack build now exits properly rather than dropping into a
  nix-shell #1778.
• allow-newer: true now causes --exact-configuration to be passed to Cabal.
  See #1579.
• stack solver no longer fails with InvalidRelFile for relative package
  paths including ... See
  #1954.
• Ignore emacs lock files when finding .cabal
  #1897.
• Use lenient UTF-8 decode for build output
  #1945.
• Clear index cache whenever index updated
  #1962.
• Fix: Building a container image drops a .stack-work dir in the current working
  (sub)directory
  #1975.
• Fix: Rebuilding when disabling profiling
  #2023.

---

Thanks to all our contributors for this release:

• Beerend Lauwers @beerendlauwers
• Chris Done @chrisdone
• Christian Hoener zu Siederdissen
• @CthulhuDen
• Emanuel Borsboom @borsboom
• Erik Stevenson @narrative
• @fmap
• Greg @myfreeweb
• Harendra Kumar @harendra-kumar
• Luigy Leon @luigy
• @malteneuss
• Mark Karpov @mrkkrp
• Martin Dehnel-Wild @mpdehnel
• Mathieu Boespflug @mboes
• Michael Sloan @mgsloan
• Michael Snoyman @snoyberg
• Noon van der Silk @silky
• Oleg Grenrus @phadej
• Paul Rouse @paul-rouse
• Rob Rix @robrix
• Simon Hengel @sol
• Simon Jakobi @sjakobi
• Taylor Fausak @tfausak
• @tejon
• Tim Dysinger @dysinger
• Tobias Kortkamp @t6
• Tristan Webb @drwebb
• Yuji Yamamoto @igrep
• Yuriy Syrovetskiy @cblp
• Yves Parès (Ywen) @YPares

And thanks as always to the 150+ contributors to past releases!

v1.0.4.3

This is a hotfix for a bug that can cause the contents of your ~/.ssh directory to be deleted when using Docker integration and stack clean --full.

Bug fixes:

• Don't delete contents of ~/.ssh when using stack clean --full with Docker
  enabled #2000

v1.0.4

See haskellstack.org for installation and upgrade instructions.

Major changes:

• Some notable changes in stack init:
  • Overall it should now be able to initialize almost all existing cabal
    packages out of the box as long as the package itself is consistently
    defined.
  • Choose the best possible snapshot and add extra dependencies on top
    of a snapshot resolver rather than a compiler resolver -
    #1583
  • Automatically omit a package (--omit-packages) when it is compiler
    incompatible or when there are packages with conflicting dependency
    requirements - #1674.
  • Some more changes for a better user experience. Please refer to
    the doc guide for details.
• Add support for hpack, alternative package description format
  #1679

Other enhancements:

• Docker: pass ~/.ssh and SSH auth socket into container, so that git repos
  work #1358.
• Docker: strip suffix from docker --version.
  #1653
• Docker: pass USER and PWD environment bariables into container.
• On each run, stack will test the stack root directory (/.stack), and the
  project and package work directories (.stack-work) for whether they are
  owned by the current user and abort if they are not. This precaution can
  be disabled with the --allow-different-user flag or allow-different-user
  option in the global config (/.stack/config.yaml).
  #471
• Added stack clean --full option for full working dir cleanup.
• YAML config: support Zip archives.
• Redownload build plan if parsing fails
  #1702.
• Give mustache templates access to a 'year' tag
  #1716.
• Have "stack ghci" warn about module name aliasing.
• Add "stack ghci --load-local-deps".
• Build Setup.hs with -rtsopts
  #1687.
• stack init accepts a list of directories.
• Add flag infos to DependencyPlanFailures (for better error output in case of
  flags) #713
• stack new --bare complains for overwrites, and add --force option
  #1597.

Bug fixes:

• Previously, stack ghci would fail with cannot satisfy -package-id when the
  implicit build step changes the package key of some dependency.
• Fix: Building with ghcjs: "ghc-pkg: Prelude.chr: bad argument: 2980338"
  #1665.
• Fix running test / bench with --profile / --trace.
• Fix: build progress counter is no longer visible
  #1685.
• Use "-RTS" w/ profiling to allow extra args
  #1772.
• Fix withUnpackedTarball7z to find name of srcDir after unpacking
  (fixes stack setup fails for ghcjs project on windows)
  #1774.
• Add space before auto-generated bench opts (makes profiling options work
  uniformly for applications and benchmark suites)
  #1771.
• Don't try to find plugin if it resembles flag.
• Setup.hs changes cause package dirtiness
  #1711.
• Send "stack templates" output to stdout
  #1792.

---

Thanks to all our contributors for this release:

• Aaron Wolf @wolftune
• Artem Chernyak @achernyak
• Dan Aloni @da-x
• Daniel Gasienica @gasi
• Emanuel Borsboom @borsboom
• Erik Stevenson @narrative
• Gauthier Segay @smoothdeveloper
• Greg Weber @gregwebs
• Grégoire Détrez @gdetrez
• Harendra Kumar @harendra-kumar
• Mark Karpov @mrkkrp
• Martin Kolinek
• Matt Gambogi @gambogi
• Michael Sloan @mgsloan
• Michael Snoyman @snoyberg
• Oleg Grenrus @phadej
• Eldar Yakupov @panamiga
• Prayag Verma @pra85
• Simon Hengel @sol
• Simon Jakobi @sjakobi
• Tristan Webb @drwebb
• Yves Parès @YPares

And thanks also to the 150+ contributors to past releases!

v1.0.2

Release notes:

• Arch Linux: Stack has been adopted into the
  official community repository,
  so we will no longer be updating the AUR with new versions. See the
  install/upgrade guide
  for current download instructions.

Major changes:

• stack init and solver overhaul
  #1583

Other enhancements:

• Disable locale/codepage hacks when GHC >=7.10.3
  #1552
• Specify multiple images to build for stack image container
  docs
• Specify which executables to include in images for stack image container
  docs
• Docker: pass supplemantary groups and umask into container
• If git fetch fails wipe the directory and try again from scratch
  #1418
• Warn if newly installed executables won't be available on the PATH
  #1362
• stack.yaml: for stack image container, specify multiple images to generate,
  and which executables should be added to those images
• GHCI: add interactive Main selection
  #1068
• Care less about the particular name of a GHCJS sdist folder
  #1622
• Unified Enable/disable help messaging
  #1613

Bug fixes:

• Don't share precompiled packages between GHC/platform variants and Docker
  #1551
• Properly redownload corrupted downloads with the correct file size.
  Mailing list discussion
• Gracefully handle invalid paths in error/warning messages
  #1561
• Nix: select the correct GHC version corresponding to the snapshot
  even when an abstract resolver is passed via --resolver on the
  command-line.
  #1641
• Fix: Stack does not allow using an external package from ghci
  #1557
• Disable ambiguous global '--resolver' option for 'stack init'
  #1531
• Obey --no-nix flag
• Fix: GHCJS Execute.hs: Non-exhaustive patterns in lambda
  #1591
• Send file-watch and sticky logger messages to stderr
  #1302
  #1635
• Use globaldb path for querying Cabal version
  #1647

v1.0.0

A Christmas present: we’re calling this version 1.0! This is a minor enhancement and bug fix release, but since Stackage LTS 4 is about to be cut we thought it was time to give Stack a version number that reflects its readiness for production use.

Enhancements:

• Added flag --profile flag: passed with stack build, it will
  enable profiling, and for --bench and --test it will generate a
  profiling report by passing +RTS -p to the executable(s). Great
  for using like stack build --bench --profile (remember that
  enabling profile will slow down your benchmarks by >4x). Run stack build --bench again to disable the profiling and get proper speeds
• Added flag --trace flag: just like --profile, it enables
  profiling, but instead of generating a report for --bench and
  --test, prints out a stack trace on exception. Great for using
  like stack build --test --trace
• Nix: all options can be overriden on command line
  #1483
• Nix: build environments (shells) are now pure by default.
• Make verbosity silent by default in script interpreter mode
  #1472
• Show a message when resetting git commit fails
  #1453
• Improve Unicode handling in project/package names
  #1337
• Fix ambiguity between a stack command and a filename to execute (prefer
  stack subcommands)
  #1471
• Support multi line interpreter directive comments
  #1394
• Handle space separated pids in ghc-pkg dump (for GHC HEAD)
  #1509
• Add ghci --no-package-hiding option
  #1517
• stack new can download templates from URL
  #1466

Bug fixes:

• Nix: stack exec options are passed properly to the stack sub process
  #1538
• Nix: specifying a shell-file works in any current working directory
  #1547
• Nix: use --resolver argument
• Docker: fix missing image message and '--docker-auto-pull'
• No HTML escaping for "stack new" template params
  #1475
• Set permissions for generated .ghci script
  #1480
• Restrict commands allowed in interpreter mode
  #1504
• stack ghci doesn't see preprocessed files for executables
  #1347
• All test suites run even when only one is requested
  #1550
• Edge cases in broken templates give odd errors
  #1535
• Fix test coverage bug on windows

v0.1.10.1

Release notes:

• Since MinGHC is dead, the MinGHC installers will not be updated with this version.

Bug fixes:

• stack image container did not actually build an image
  #1473

v0.1.10.0

Release notes:

• The Stack home page is now at haskellstack.org,
  which shows the documentation rendered by readthedocs.org. Note: this
  has necessitated some changes to the links in the documentation's markdown
  source code, so please check the links on the website before submitting a PR
  to fix them.
• The locations of the
  Ubuntu
  and
  Debian
  package repositories have changed to have correct URL semantics according to
  Debian's guidelines
  #1378. The old
  locations will continue to work for some months, but we suggest that you
  adjust your /etc/apt/sources.list.d/fpco.list to the new location to avoid
  future disruption.
• openSUSE and SUSE Linux Enterprise
  packages are now available, thanks to @mimi1vx.
  Note: there will be some lag before these pick up new versions, as they are
  based on Stackage LTS.

Major changes:

• Support for building inside a Nix-shell providing system dependencies
  #1285
• Add optional GPG signing on stack upload --sign or with
  stack sig sign ...

Other enhancements:

• Print latest applicable version of packages on conflicts
  #508
• Support for packages located in Mercurial repositories
  #1397
• Only run benchmarks specified as build targets
  #1412
• Support git-style executable fall-through (stack something executes
  stack-something if present)
  #1433
• GHCi now loads intermediate dependencies
  #584
• --work-dir option for overriding .stack-work
  #1178
• Support detailed-0.9 tests
  #1429
• Docker: improved POSIX signal proxying to containers
  #547

Bug fixes:

• Show absolute paths in error messages in multi-package builds
  #1348
• Docker-built binaries and libraries in different path
  #911
  #1367
• Docker: --resolver argument didn't effect selected image tag
• GHCi: Spaces in filepaths caused module loading issues
  #1401
• GHCi: cpp-options in cabal files weren't used
  #1419
• Benchmarks couldn't be run independently of eachother
  #1412
• Send output of building setup to stderr
  #1410

v0.1.8.0

See README for installation and upgrade instructions.

There are now Windows installers available: download them here. In addition, new Fedora 23 packages are available here.

Note that, starting with v0.1.8.0, releases of Stack will always have an even-numbered second-to-last version component. Odd second-to-last version components are reserved for unstable builds.

Major changes:

• GHCJS can now be used with stackage snapshots via the new compiler field.
• Docker integration works with non-FP Complete generated images
  #531

Other enhancements:

• Added an allow-newer config option
  #922
  #770
• When a Hackage revision invalidates a build plan in a snapshot, trust the
  snapshot #770
• Added a stack config set resolver RESOLVER command. Part of work on
  #115
• stack setup can now install GHCJS on windows. See
  #1145 and
  #749
• stack hpc report command added, which generates reports for HPC tix files
• stack ghci now accepts all the flags accepted by stack build. See
  #1186
• stack ghci builds the project before launching GHCi. If the build fails,
  optimistically launch GHCi anyway. Use stack ghci --no-build option to
  disable #1065
• stack ghci now detects and warns about various circumstances where it is
  liable to fail. See
  #1270
• Added require-docker-version configuration option
• Packages will now usually be built along with their tests and benchmarks. See
  #1166
• Relative local-bin-path paths will be relative to the project's root
  directory, not the current working directory.
  #1340
• stack clean now takes an optional [PACKAGE] argument for use in
  multi-package projects. See
  #583
• Ignore cabal_macros.h as a dependency
  #1195
• Pad timestamps and show local time in --verbose output
  #1226
• GHCi: Import all modules after loading them
  #995
• Add subcommand aliases: repl for ghci, and runhaskell for runghc
  #1241
• Add typo recommendations for unknown package identifiers
  #158
• Add stack path --local-hpc-root option
• Overhaul dependencies' haddocks copying
  #1231
• Support for extra-package-dbs in 'stack ghci'
  #1229
• stack new disallows package names with "words" consisting solely of numbers
  #1336
• stack build --fast turns off optimizations

Bug fixes:

• Fix: Haddocks not copied for dependencies
  #1105
• Fix: Global options did not work consistently after subcommand
  #519
• Fix: 'stack ghci' doesn't notice that a module got deleted
  #1180
• Rebuild when cabal file is changed
• Fix: Paths in GHC warnings not canonicalized, nor those for packages in
  subdirectories or outside the project root
  #1259
• Fix: unlisted files in tests and benchmarks trigger extraneous second build
  #838