staversion

staversion is a command-line tool to look for version numbers of Haskell packages.

See --help message for detailed usage.

Package version in Stackage

staversion mainly focuses on package versions in stackage, i.e. it answers to questions like "What version is the package X in stackage lts-Y.ZZ?" It aims to make it easier to write build-depends section in YOUR_PACKAGE.cabal.

$ staversion --resolver lts-4.2 conduit
------ lts-4.2
conduit ==1.2.6.1

$ staversion --resolver lts-4.2 --resolver lts-7.0 conduit
------ lts-4.2
conduit ==1.2.6.1

------ lts-7.0
conduit ==1.2.7

$ staversion --resolver lts-4.2 --resolver lts-6 conduit base
------ lts-4.2
conduit ==1.2.6.1,
base ==4.8.2.0

------ lts-6 (lts-6.31)
conduit ==1.2.9.1,
base ==4.8.2.0

staversion first reads build plan YAML files that are stored locally in your computer, then it tries to fetch them over network.

Package version in Hackage

You can also look up the latest version numbers hosted on hackage with --hackage (-H) option.

$ staversion --hackage conduit base
------ latest in hackage
conduit ==1.2.8,
base ==4.9.0.0

Package version for build-depends

You can also specify .cabal files in the query. In that case, staversion reads build-depends fields in all sections of those .cabal files, and shows versions of the dependency packages.

$ staversion --hackage staversion.cabal 
------ latest in hackage
-- staversion.cabal - library
base ==4.9.0.0,
unordered-containers ==0.2.7.2,
aeson ==1.0.2.1,
text ==1.2.2.1,
bytestring ==0.10.8.1,
yaml ==0.8.21.1,
filepath ==1.4.1.1,
directory ==1.3.0.0,
optparse-applicative ==0.13.0.0,
containers ==0.5.9.1,
http-client ==0.5.5,
http-client-tls ==0.3.3,
http-types ==0.9.1,
transformers ==0.5.2.0,
transformers-compat ==0.5.1.4,
megaparsec ==5.1.2

(snip)

Package version ranges over different resolvers

With --aggregate (-a) option, you can aggregate version numbers in different resolvers into a version range using the given aggregation rule.

For example, or rule just concatenates versions with (||) condition.

$ staversion --aggregate or -r lts-5 -r lts-6 -r lts-7 -H aeson
------ lts-5 (lts-5.18), lts-6 (lts-6.31), lts-7 (lts-7.20), latest in hackage
aeson ==0.9.0.1 || ==0.11.3.0 || ==1.1.1.0

pvp rule aggregates versions into a range that should be compatible with the obtained versions in terms of PVP (Package Versioning Policy.)

$ staversion --aggregate pvp -r lts-5 -r lts-6 -r lts-7 -H aeson
------ lts-5 (lts-5.18), lts-6 (lts-6.31), lts-7 (lts-7.22), latest in hackage
aeson >=0.9.0.1 && <0.10 || >=0.11.3 && <0.12 || ==1.2.*

You can use --aggregate option with querying .cabal files.

$ staversion --aggregate pvp -r lts-6 -r lts-7 -r lts-8 staversion.cabal 
------ lts-6 (lts-6.31), lts-7 (lts-7.22), lts-8 (lts-8.13)
-- staversion.cabal - library
base >=4.8.2 && <4.10,
unordered-containers >=0.2.8 && <0.3,
aeson >=0.11.3 && <0.12 || >=1.0.2.1 && <1.1,
text >=1.2.2.1 && <1.3,
bytestring >=0.10.6 && <0.11,
yaml >=0.8.22 && <0.9,
filepath ==1.4.*,
directory >=1.2.2 && <1.4,
optparse-applicative >=0.12.1 && <0.13 || >=0.13.2 && <0.14,
containers >=0.5.6.2 && <0.6,
http-client >=0.4.31.2 && <0.5 || >=0.5.6.1 && <0.6,

(snip)

TODO

• Cache build plans in some local storage (SQLite?)

Author

Toshio Ito debug.ito@gmail.com