colin/nixpkgs
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

haskell.lib.makePackageSet: all-cabal-hashes can be a directory (#188203)

Browse Source 
* all-cabal-hahses can be a directory

Motivating problem: we want to use the flake.lock for all-cabal-hashes
as a github repository as our revision pin, and then import that to pass
as all-cabal-hashes. To do that we need it to accept a directory rather
than a tarball.

* all-cabal-hashes: add some comments
This commit is contained in:
Alexander Vieth 2022-08-24 21:57:52 -04:00 committed by GitHub
parent 31c252e209
commit f28ab51b54
No known key found for this signature in database
GPG Key ID: 4AEE18F83AFDEB23
1 changed files with 15 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

17
pkgs/development/haskell-modules/make-package-set.nix
View File

@ -21,6 +21,9 @@
, haskellLib
, # hashes for downloading Hackage packages
# This is either a directory or a .tar.gz containing the cabal files and
# hashes of Hackage as exemplified by this repository:
# https://github.com/commercialhaskell/all-cabal-hashes/tree/hackage
all-cabal-hashes
, # compiler to use
@ -136,10 +139,20 @@ let
cabal2nix --compiler=${self.ghc.haskellCompilerName} --system=${hostPlatform.config} ${sha256Arg} "${src}" ${extraCabal2nixOptions} > "$out/default.nix"
'';
# Given a package name and version, e.g. name = "async", version = "2.2.4",
# gives its cabal file and hashes (JSON file) as discovered from the
# all-cabal-hashes value. If that's a directory, it will copy the relevant
# files to $out; if it's a tarball, it will extract and move them to $out.
all-cabal-hashes-component = name: version: buildPackages.runCommand "all-cabal-hashes-component-${name}-${version}" {} ''
tar --wildcards -xzvf ${all-cabal-hashes} \*/${name}/${version}/${name}.{json,cabal}
mkdir -p $out
mv */${name}/${version}/${name}.{json,cabal} $out
if [ -d ${all-cabal-hashes} ]
then
cp ${all-cabal-hashes}/${name}/${version}/${name}.json $out
cp ${all-cabal-hashes}/${name}/${version}/${name}.cabal $out
else
tar --wildcards -xzvf ${all-cabal-hashes} \*/${name}/${version}/${name}.{json,cabal}
mv */${name}/${version}/${name}.{json,cabal} $out
fi
'';
hackage2nix = name: version: let component = all-cabal-hashes-component name version; in self.haskellSrc2nix {