[Haskell-cafe] ANN: stack-1.6.1

Emanuel Borsboom manny at fpcomplete.com
Thu Dec 7 05:37:06 UTC 2017

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

Note: we are releasing a bit earlier than planned due to #3624 <https://github.com/commercialhaskell/stack/issues/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.

Changes since v1.5.1

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 <https://www.fpcomplete.com/blog/2017/07/stacks-new-extensible-snapshots>. PR #3249 <https://github.com/commercialhaskell/stack/pull/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 <https://github.com/commercialhaskell/stack/issues/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 <https://github.com/commercialhaskell/stack/issues/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 <https://github.com/commercialhaskell/stack/issues/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 <https://github.com/commercialhaskell/stack/issues/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 <https://github.com/commercialhaskell/stack/issues/3444>.
ghc-options: for specific packages will now come after the options
specified for all packages / particular sets of packages. See
#3573 <https://github.com/commercialhaskell/stack/issues/3573>.
The pvp-bounds feature is no longer fully functional, due to some
issues with the Cabal library's printer. See
#3550 <https://github.com/commercialhaskell/stack/issues/3550>.
Other enhancements:

The with-hpack configuration option specifies an Hpack executable to use
instead of the Hpack bundled with Stack. Please
see #3179 <https://github.com/commercialhaskell/stack/issues/3179>.
It's now possible to skip tests and benchmarks using --skip
GitSHA1 is now StaticSHA256 and is implemented using the StaticSize 64 ByteString for improved performance.
See #3006 <https://github.com/commercialhaskell/stack/issues/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
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 <https://github.com/commercialhaskell/stack/issues/3232>.
stack setup for ghcjs will now install alex and happy if
they are not present. See
#3109 <https://github.com/commercialhaskell/stack/issues/3232>.
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 <https://github.com/commercialhaskell/stack/issues/3329>
Better error message for case that stack ghci file targets are
combined with invalid package targets. See:
#3342 <https://github.com/commercialhaskell/stack/issues/3342>
For profiling now uses -fprof-auto -fprof-cafs instead of
the deprecated -auto-all -caf-all. See:
#3360 <https://github.com/commercialhaskell/stack/issues/3360>
Better descriptions are now available for stack upgrade --help. See:
#3070 <https://github.com/commercialhaskell/stack/issues/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 <https://github.com/commercialhaskell/stack/issues/3264>
Plan construction will detect if you add an executable-only package
as a library dependency, resulting in much clearer error
messages. See:
#2195 <https://github.com/commercialhaskell/stack/issues/2195>.
Addition of --ghc-options to stack script to pass options directly
to GHC. See:
#3454 <https://github.com/commercialhaskell/stack/issues/3454>
Add hpack package.yaml to build Stack itself
Add ignore-revision-mismatch setting. See:
#3520 <https://github.com/commercialhaskell/stack/issues/3520>.
Log when each individual test suite finishes. See:
#3552 <https://github.com/commercialhaskell/stack/issues/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 <https://github.com/commercialhaskell/stack/issues/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
Passing non local packages as targets to stack ghci will now
cause them to be used as -package args along with package
Detect when user changed .cabal file instead of package.yaml. This
was implemented upstream in hpack. See
#3383 <https://github.com/commercialhaskell/stack/issues/3383>.
Automatically run autoreconf -i as necessary when a configure
script is missing. See
#3534 <https://github.com/commercialhaskell/stack/issues/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 <https://github.com/commercialhaskell/stack/issues/3188>.
Bug fixes:

stack hoogle correctly generates Hoogle databases. See:
#3362 <https://github.com/commercialhaskell/stack/issues/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 <https://github.com/commercialhaskell/stack/issues/2886>
Fixed an issue where Stack wouldn't detect missing Docker images
properly with newer Docker versions.
#3171 <https://github.com/commercialhaskell/stack/pull/3171>
Previously, cabal files with just test-suite could cause build to fail
(#2862 <https://github.com/commercialhaskell/stack/issues/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 <https://github.com/commercialhaskell/stack/issues/3319>.
Modified the flag parser within Stack to match the behavior of
Cabal's flag parser, which allows multiple sequential dashes. See
#3345 <https://github.com/commercialhaskell/stack/issues/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 <https://github.com/commercialhaskell/stack/issues/3033>
The Stack install script now respects the -d option.
See #3366 <https://github.com/commercialhaskell/stack/pull/3366>.
stack script can now handle relative paths to source files.
See #3372 <https://github.com/commercialhaskell/stack/issues/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 <https://github.com/commercialhaskell/stack/issues/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 <https://github.com/commercialhaskell/stack/issues/3400>.
docs.haskellstack.org RTD documentation search is replaced by the mkdocs
search. Please see
#3376 <https://github.com/commercialhaskell/stack/issues/3376>.
stack clean now works with nix. See
#3468 <https://github.com/commercialhaskell/stack/issues/3376>.
stack build --only-dependencies no longer builds local project packages
that are depended on. See
#3476 <https://github.com/commercialhaskell/stack/issues/3476>.
Properly handle relative paths stored in the precompiled cache files. See
#3431 <https://github.com/commercialhaskell/stack/issues/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 <https://github.com/commercialhaskell/stack/issues/2781>.
When --pvp-bounds is enabled for sdist or upload, internal
dependencies could cause errors when uploaded to hackage. This is
fixed, see #3290 <https://github.com/commercialhaskell/stack/issues/3290>
Fixes a bug where nonexistent hackage versions would cause stack to
suggest the same package name, without giving version info. See
#3562 <https://github.com/commercialhaskell/stack/issues/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 <https://github.com/commercialhaskell/stack/issues/3574>.
Building all executables only happens once instead of every
time. See
#3229 <https://github.com/commercialhaskell/stack/issues/3229> for
more info.
Thanks to all our contributors for this release:

Aaron McDaid
Adam McCullough
Alexey Zabelin
Ashley Towns
Chris Done
Chris Martin
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
Neil Mitchell
Oleg Grenrus
Paolo G. Giarrusso
Reuben D'Netto
Roman Cheplyaka
Samuli Thomasson
Scott Fleischman
Shea Levy
Simon Jakobi
Tom Sydney Kerckhove
Walter Franzini

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