cabal-file is a library on top of the hackage-security library for accessing cabal files and versions, and also a small tool for getting and comparing .cabal files.
Since it accesses package and .cabal file data directly from the local Hackage repo cache index tar archive under ~/.cabal/ it is quite fast.
List all Hackage packages:
$ cblfile list | grep ghcide ghcide
List versions of a package:
$ cblfile list pandoc 0.4 : : 22.214.171.124
Diff .cabal files of package versions
$ cblfile diff pandoc 2.8 126.96.36.199 --- pandoc-2.8.cabal 2020-05-24 19:47:58.487921450 +0800 +++ pandoc-188.8.131.52.cabal 2020-05-24 19:47:58.487921450 +0800 @@ -1,10 +1,10 @@ name: pandoc -version: 2.8 +version: 184.108.40.206 cabal-version: 2.0 : :
Latest version of a package:
$ cblfile latest extra 1.7.1
Timestamp for the latest .cabal file (or for a specific version):
$ cblfile date dhall 2020-05-19 02:18:01 UTC
Save a .cabal file (latest or specific version)
$ cblfile get purescript $ ls purescript.cabal purescript.cabal
Check package source metadata:
$ cblfile metadata tls-1.5.4 Size: 150171 SHA256 Hash "ce42bfa581a50f62776581da4b86408ebb1a51bc6cb2f95ad0a2ac7caa19a437"
cblfile depends outputs quite verbose package dependency lists.
For library documentation see the Hackage.Index documentation.
For example usage see
I originally wrote the
depends command for displaying dependency information
about packages in a more friendly way.
Later, since hdiff is out of sync for some packages,
and I use it particularly for comparing versions of .cabal files,
I decided to create the
Realising I could pull .cabal files direct from the cabal index cache,
the rest of cabal-file flowed on from there.
If you want full diffs of Hackage sources you can try out cabal-diff from cabal-extras.
Revision history for cabal-file
0.1.1 – 2020-11-13
- diff: ignore whitespace by default
0.1.0 – 2020-05-24
- initial release
- cblfile commands: diff (second), list, latest, files, get, date, show, metadata, preferred, depends (oldest code)
- Hackage.Index library module