Re: [Haskell-cafe] Package Management with Stack?

On Sat, 11 Mar 2017 at 01:38 Jun Inoue wrote:

Thanks for the suggestion, Adam. That does it for xmonad-contrib. Unfortunately, it fails when I go on to add xmonad-extras, probably because the version of xmonad already installed can't be resolved with the available version(s) of xmonad-extras. (I forgot to note exactly which packages I had before, so I'm installing these things one by one, based on compilation errors of ~/.xmonad/xmonad.hs.)

$ stack install xmonad-extras hint-0.6.0 libmpd-0.9.0.6 --resolver lts-8.4

Error: While constructing the build plan, the following exceptions were encountered:

In the dependencies for xmonad-extras-0.12.1: hint-0.6.0 must match >=0.3.3.3 && <0.5 (latest applicable is 0.4.3) libmpd-0.9.0.6 must match >=0.8 && <0.9 (latest applicable is 0.8.0.5) xmonad-0.13 must match >=0.10 && <0.13 (latest applicable is 0.12) xmonad-contrib must match >=0.10 && <0.13, but the stack configuration has no specified version (latest applicable is 0.12)

Recommended action: try adding the following to your extra-deps in /home/jun/.stack/global-project/stack.yaml: - xmonad-contrib-0.12

You may also want to try the 'stack solver' command Plan construction failed.

Adding the fact that I seem to have to list a lot of deps on the command line or in stack.yaml and Brandon's suggestion that I'm using this tool for the wrong purpose, this seems like a deal breaker for me :(

It's not that you are using the wrong tool, there is no tool that would let you install incompatible versions together! (There is --allow-newer in stack and cabal-install but then you are even less likely to end up with something that works) But once you get these mismatches I find cabal-install (in an empty sandbox) easier to use for debugging: ``` $ cabal install xmonad xmonad-contrib xmonad-extras --dry Resolving dependencies... In order, the following would be installed (use -v for more details): data-default-class-0.1.2.0 data-default-instances-containers-0.0.1 dlist-0.8.0.2 data-default-instances-dlist-0.0.1 extensible-exceptions-0.1.1.4 mtl-2.2.1 old-locale-1.0.0.7 data-default-instances-old-locale-0.0.1 data-default-0.7.1.1 X11-1.6.1.2 (latest: 1.8) old-time-1.1.0.3 random-1.1 regex-base-0.93.2 regex-posix-0.95.2 setlocale-1.0.0.4 split-0.2.3.1 text-1.2.2.1 parsec-3.1.11 utf8-string-1.0.1.1 X11-xft-0.3.1 xmonad-0.12 (latest: 0.13) xmonad-contrib-0.12 (latest: 0.13) xmonad-extras-0.12.1 ``` cabal-install always tries to pick the latest versions so this implies that xmonad-extras can't use the latest xmonad & xmonad-contrib. So if you are fine using older versions of those: there you go! You can verify this further by adding constraints: ``` $ cabal install 'xmonad>=0.13' 'xmonad-contrib>=0.13' xmonad-extras --dry Resolving dependencies... cabal: Could not resolve dependencies: trying: xmonad-0.13 (user goal) trying: base-4.9.1.0/installed-4.9... (dependency of xmonad-0.13) next goal: xmonad-extras (user goal) rejecting: xmonad-extras-0.12.1, xmonad-extras-0.12 (conflict: xmonad==0.13, xmonad-extras => xmonad>=0.10 && <0.13) rejecting: xmonad-extras-0.11 (conflict: xmonad==0.13, xmonad-extras => xmonad>=0.10 && <0.12) rejecting: xmonad-extras-0.10.1.2, xmonad-extras-0.10.1.1, xmonad-extras-0.10.1, xmonad-extras-0.10 (conflict: xmonad==0.13, xmonad-extras => xmonad>=0.10 && <0.11) rejecting: xmonad-extras-0.9.2, xmonad-extras-0.9.1 (conflict: xmonad==0.13, xmonad-extras => xmonad>=0.9 && <0.10) rejecting: xmonad-extras-0.9, xmonad-extras-0.0 (conflict: base==4.9.1.0/installed-4.9..., xmonad-extras => base>=3 && <4 || <3) Dependency tree exhaustively searched. ``` What you really want is some blessed combination of packages that work together, and this is exactly what a stackage snapshot would give you if these packages were all part of stackage... But it's true that stack isn't a package manager and there is no active effort within stackage to make as many executables as possible installable.

On Sat, Mar 11, 2017 at 4:11 AM, Adam Bergmark wrote:

...

I use the global stack environment to install most executables, it works best when the package is in a snapshot of course. There is no need to change the global config, try this: stack install xmonad-contrib X11-xft-0.3.1 --resolver lts-8.4

You can also look for a stack.yaml in the repo of the executable and use that resolver + any extra deps on the command line, that'll most likely work even if the package isn't in a snapshot.

HTH, Adam

On Fri, 10 Mar 2017 at 18:56 Matt wrote:

...

Stack does have a notion of a global project, which it uses if you're

not

...

in a project directory. The error message you received:

Error: While constructing the build plan, the following exceptions were encountered:

In the dependencies for xmonad-contrib-0.13: X11-xft must match >=0.2, but the stack configuration has no specified version (latest applicable is 0.3.1)

Recommended action: try adding the following to your extra-deps in /home/jun/.stack/global-project/stack.yaml: - X11-xft-0.3.1

tells you how to make X11-xft-0.3.1 available to the global project, which should allow you to install xmonad-contrib into this global package.

Matt Parsons

On Fri, Mar 10, 2017 at 10:33 AM, Brandon Allbery wrote:

...

On Fri, Mar 10, 2017 at 12:28 PM, Jun Inoue

wrote:

...

...

Am I fundamentally misunderstanding how stack is supposed to be used?

Stack is not a package manager. It is a reproducible builds tool. Ad hoc usage like you are doing is outside of its purview.

Also, last I checked, for some reason xmonad-contrib wasn't in stackage, so stack's primary mechanism for avoiding conflicts fails.

-- brandon s allbery kf8nh sine nomine associates allbery.b@gmail.com ballbery@sinenomine.net unix, openafs, kerberos, infrastructure, xmonad http://sinenomine.net

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-- Jun Inoue