The cabal-helper package

[ Tags: agpl, distribution, library, program ] [ Propose Tags ]

Cabal's little helper provides access to build information gathered by cabal when configuring a project. Specifically we're interested in retrieving enough information to bring up a compiler session, using the GHC API, which is similar to running cabal repl in a project.

While simple in principle this is complicated by the fact that the information Cabal writes to disk is in an unstable format and only really accessible through the Cabal API itself.

Since we do not want to bind the user of a development tool which utilises this library to a specific version of Cabal we compile the code which interfaces with the Cabal library's API on the user's machine, at runtime, against whichever version of Cabal was used to write the on disk information for a given project.

If this version of Cabal is not available on the users machine anymore, which is fairly likely since cabal-install is usually linked statically, we have support for compiling the Cabal library also. In this case the library is installed into a private, isolated, package database in $XDG_CACHE_HOME/cabal-helper so as to not interfere with the user's package database.


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Versions 0.1.0.0, 0.1.0.1, 0.2.0.0, 0.3.0.0, 0.3.1.0, 0.3.2.0, 0.3.2.1, 0.3.3.0, 0.3.4.0, 0.3.5.0, 0.3.6.0, 0.3.7.0, 0.3.8.0, 0.3.9.0, 0.4.0.0, 0.5.0.0, 0.5.1.0, 0.5.2.0, 0.5.3.0, 0.6.0.0, 0.6.1.0, 0.6.2.0, 0.6.3.0, 0.6.3.1, 0.7.0.1, 0.7.1.0, 0.7.2.0, 0.7.3.0, 0.8.0.0, 0.8.0.1, 0.8.0.2 (info)
Dependencies base (>=4.5 && <5), bytestring (>=0.9.2.1 && <0.11), Cabal (>=1.14 && <1.26 || ==2.0.*), containers, directory (>=1.1.0.2 && <1.4), exceptions (>=0.8.3 && <0.9), filepath (>=1.3.0.0 && <1.5), ghc-prim, mtl (>=2.0 && <2.3), process (>=1.1.0.1 && <1.7), semigroupoids (==5.2.*), template-haskell (>=2.7.0.0 && <2.13), temporary (>=1.2.0.4 && <1.3), transformers (>=0.3.0.0 && <0.6), unix (>=2.5.1.1 && <2.8), unix-compat (>=0.4.3.1 && <0.6), utf8-string (>=1.0.1.1 && <1.1) [details]
License AGPL-3
Author Daniel Gröber <dxld@darkboxed.org>
Maintainer dxld@darkboxed.org
Category Distribution
Source repo head: git clone https://github.com/DanielG/cabal-helper.git
Uploaded Fri Feb 9 16:05:26 UTC 2018 by DanielG
Distributions Arch:0.8.0.2, Debian:0.6.2.0, NixOS:0.8.0.2
Executables cabal-helper-main, cabal-helper-wrapper
Downloads 21668 total (518 in the last 30 days)
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Status Docs available [build log]
Last success reported on 2018-02-09 [all 1 reports]
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Readme for cabal-helper-0.8.0.1

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cabal-helper

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Cabal's little helper provides access to build information gathered by cabal when configuring a project. Specifically we're interested in retrieving enough information to bring up a compiler session, using the GHC API, which is similar to running cabal repl in a project.

While simple in principle this is complicated by the fact that the information Cabal writes to disk is in an unstable format and only really accessible through the Cabal API itself.

Since we do not want to bind the user of a development tool which utilises this library to a specific version of Cabal we compile the code which interfaces with the Cabal library's API on the user's machine, at runtime, against whichever version of Cabal was used to write the on disk information for a given project.

If this version of Cabal is not available on the users machine anymore, which is fairly likely since cabal-install is usually linked statically, we have support for compiling the Cabal library also. In this case the library is installed into a private, isolated, package database in $XDG_CACHE_HOME/cabal-helper so as to not interfere with the user's package database.

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If you have any problems, suggestions, comments swing by #ghc-mod (web client) on Freenode. If you're reporting a bug please also create an issue here so we have a way to contact you if you don't have time to stay.

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