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Showing content from https://github.com/commercialhaskell/stack/releases/tag/v1.6.1 below:

Release v1.6.1 · commercialhaskell/stack · GitHub

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

Note: we are releasing a bit earlier than planned due to #3624. As such, not all the binaries have been built yet, but the commonly used 64-bit binaries of Linux static, macOS, and Windows are available.

In addition, the Windows installer and binary has not been codesigned (we are awaiting validation of a new codesign certificate), and you may see a "Windows Defender SmartScreen prevented an unrecognized app from starting" warning when you try to run them. If so, click on More info, and then click on the Run anyway button that appears.

Major changes:

• Complete overhaul of how snapshots are defined, the packages and
  extra-deps fields, and a number of related items. For full
  details, please see
  the writeup on these changes. PR #3249,
  see the PR description for a number of related issues.
• Upgraded to version 2.0 of the Cabal library.

Behavior changes:

• The --install-ghc flag is now on by default. For example, if you
  run stack build in a directory requiring a GHC that you do not
  currently have, Stack will automatically download and install that
  GHC. You can explicitly set install-ghc: false or pass the flag
  --no-install-ghc to regain the previous behavior.
• stack ghci no longer loads modules grouped by package. This is
  always an improvement for plain ghci - it makes loading faster and
  less noisy. For intero, this has the side-effect that it will no
  longer load multiple packages that depend on TH loading relative
  paths. TH relative paths will still work when loading a single
  package into intero. See
  #3309
• Setting GHC options for a package via ghc-options: in your
  stack.yaml will promote it to a local package, providing for more
  consistency with flags and better reproducibility. See:
  #849
• The package-indices setting with Hackage no longer works with the
  00-index.tar.gz tarball, but must use the 01-index.tar.gz file
  to allow revised packages to be found.
• Options passsed via --ghci-options are now passed to the end of the
  invocation of ghci, instead of the middle. This allows using +RTS
  without an accompanying -RTS.
• When auto-detecting --ghc-build, tinfo6 is now preferred over
  standard if both versions of libtinfo are installed
• Addition of stack build --copy-compiler-tool, to allow tools like
  intero to be installed globally for a particular compiler.
  #2643
• Stack will ask before saving hackage credentials to file. This new
  prompt can be avoided by using the save-hackage-creds setting. Please
  see #2159.
• The GHCRTS environment variable will no longer be passed through to
  every program stack runs. Instead, it will only be passed through
  commands like exec, runghc, script, ghci, etc.
  See #3444.
• ghc-options: for specific packages will now come after the options
  specified for all packages / particular sets of packages. See
  #3573.
• The pvp-bounds feature is no longer fully functional, due to some
  issues with the Cabal library's printer. See
  #3550.

Other enhancements:

• The with-hpack configuration option specifies an Hpack executable to use
  instead of the Hpack bundled with Stack. Please
  see #3179.
• It's now possible to skip tests and benchmarks using --skip
  flag
• GitSHA1 is now StaticSHA256 and is implemented using the StaticSize 64 ByteString for improved performance.
  See #3006
• Dependencies via HTTP(S) archives have been generalized to allow
  local file path archives, as well as to support setting a
  cryptographic hash (SHA256) of the contents for better
  reproducibility.
• Allow specifying --git-branch when upgrading
• When running stack upgrade from a file which is different from the
  default executable path (e.g., on POSIX systems,
  ~/.local/bin/stack), it will now additionally copy the new
  executable over the currently running stack executable. If
  permission is denied (such as in /usr/local/bin/stack), the user
  will be prompted to try again using sudo. This is intended to
  assist with the user experience when the PATH environment variable
  has not been properly configured, see
  #3232.
• stack setup for ghcjs will now install alex and happy if
  they are not present. See
  #3109.
• Added stack ghci --only-main flag, to skip loading / importing
  all but main modules. See the ghci documentation page
  for further info.
• Allow GHC's colored output to show through. GHC colors output
  starting with version 8.2.1, for older GHC this does nothing.
  Sometimes GHC's heuristics would work fine even before this change,
  for example in stack ghci, but this override's GHC's heuristics
  when they're broken by our collecting and processing GHC's output.
• Extended the ghc-options field to support $locals, $targets,
  and $everything. See:
  #3329
• Better error message for case that stack ghci file targets are
  combined with invalid package targets. See:
  #3342
• For profiling now uses -fprof-auto -fprof-cafs instead of
  the deprecated -auto-all -caf-all. See:
  #3360
• Better descriptions are now available for stack upgrade --help. See:
  #3070
• When using Nix, nix-shell now depends always on gcc to prevent build errors
  when using the FFI. As ghc depends on gcc anyway, this doesn't increase the
  dependency footprint.
• --cwd DIR can now be passed to stack exec in order to execute the
  program in a different directory. See:
  #3264
• Plan construction will detect if you add an executable-only package
  as a library dependency, resulting in much clearer error
  messages. See:
  #2195.
• Addition of --ghc-options to stack script to pass options directly
  to GHC. See:
  #3454
• Add hpack package.yaml to build Stack itself
• Add ignore-revision-mismatch setting. See:
  #3520.
• Log when each individual test suite finishes. See:
  #3552.
• Avoid spurious rebuilds when using --file-watch by not watching files for
  executable, test and benchmark components that aren't a target. See:
  #3483.
• Stack will now try to detect the width of the running terminal
  (only on POSIX for the moment) and use that to better display
  output messages. Work is ongoing, so some messages will not
  be optimal yet. The terminal width can be overriden with the
  new --terminal-width command-line option (this works even on
  non-POSIX).
• Passing non local packages as targets to stack ghci will now
  cause them to be used as -package args along with package
  hiding.
• Detect when user changed .cabal file instead of package.yaml. This
  was implemented upstream in hpack. See
  #3383.
• Automatically run autoreconf -i as necessary when a configure
  script is missing. See
  #3534
• GHC bindists can now be identified by their SHA256 checksum in addition to
  their SHA1 checksum, allowing for more security in download.
• For filesystem setup-info paths, it's no longer assumed that the
  directory is writable, instead a temp dir is used. See
  #3188.

Bug fixes:

• stack hoogle correctly generates Hoogle databases. See:
  #3362
• stack --docker-help is now clearer about --docker implying
  system-ghc: true, rather than both --docker and --no-docker.
• stack haddock now includes package names for all modules in the
  Haddock index page. See:
  #2886
• Fixed an issue where Stack wouldn't detect missing Docker images
  properly with newer Docker versions.
  #3171
• Previously, cabal files with just test-suite could cause build to fail
  (#2862)
• If an invalid snapshot file has been detected (usually due to
  mismatched hashes), Stack will delete the downloaded file and
  recommend either retrying or filing an issue upstream. See
  #3319.
• Modified the flag parser within Stack to match the behavior of
  Cabal's flag parser, which allows multiple sequential dashes. See
  #3345
• Now clears the hackage index cache if it is older than the
  downloaded index. Fixes potential issue if stack was interrupted when
  updating index.
  See #3033
• The Stack install script now respects the -d option.
  See #3366.
• stack script can now handle relative paths to source files.
  See #3372.
• Fixes explanation of why a target is needed by the build plan, when the
  target is an extra dependency from the commandline.
  See #3378.
• Previously, if you delete a yaml file from ~/.stack/build-plan, it would
  trust the etag and not re-download. Fixed in this version.
• Invoking stack --docker in parallel now correctly locks the sqlite database.
  See #3400.
• docs.haskellstack.org RTD documentation search is replaced by the mkdocs
  search. Please see
  #3376.
• stack clean now works with nix. See
  #3468.
• stack build --only-dependencies no longer builds local project packages
  that are depended on. See
  #3476.
• Properly handle relative paths stored in the precompiled cache files. See
  #3431.
• In some cases, Cabal does not realize that it needs to reconfigure, and must
  be told to do so automatically. This would manifest as a "shadowed
  dependency" error message. We now force a reconfigure whenever a dependency is
  built, even if the package ID remained the same. See
  #2781.
• When --pvp-bounds is enabled for sdist or upload, internal
  dependencies could cause errors when uploaded to hackage. This is
  fixed, see #3290
• Fixes a bug where nonexistent hackage versions would cause stack to
  suggest the same package name, without giving version info. See
  #3562
• Fixes a bug that has existed since 1.5.0, where
  stack setup --upgrade-cabal would say that Cabal is already the latest
  version, when it wasn't.
• Ensure that an extra-dep from a local directory is not treated as
  a $locals for GHC options purposes. See
  #3574.
• Building all executables only happens once instead of every
  time. See
  #3229 for
  more info.

Thanks to all our contributors for this release:

• Aaron McDaid
• Adam McCullough
• Alexey Zabelin
• Andy
• Ashley Towns
• Chris Done
• Chris Martin
• d-dorazio
• Deni Bertovic
• Dmitry Ivanov
• Echo Nolan
• Emanuel Borsboom
• Felix Yan
• Filippo Vitale
• Gábor Lipták
• Ivan Lazar Miljenovic
• Joshua Simmons
• Judah Jacobson
• Khan Thompson
• Lizao Li
• Luke Murphy
• Martin Kolinek
• Mathieu Boespflug
• Matt Audesse
• Matthias Heinzel
• Michael Sloan
• Michael Snoyman
• mrkkrp
• Neil Mitchell
• Oleg Grenrus
• OvermindDL1
• Paolo G. Giarrusso
• Rafe
• Reuben D'Netto
• Roman Cheplyaka
• Samuli Thomasson
• Schlueter
• Scott Fleischman
• Shea Levy
• Simon Jakobi
• Tom Sydney Kerckhove
• tswelsh
• Walter Franzini

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