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GHC 9.10.3 · lts/ghc-9.10.x · 248f8f0 · 2026-10-05

Modulehackage-db-2.1.3Haskell2010

Distribution.Hackage.DB.MetaData

Types and class instances for parsing the package.json files found in a 01-index.tar tarball from Hackage with Data.Aeson. These parsers mirror the exact structure of those files, but only a small part of it is actually of interest to anyone other than implementors of cabal-install. Everyone else will most likely prefer the functions oferred by Distribution.Hackage.DB.Parsed.

  • 3 types
  • 1 value
  • Packagehackage-db-2.1.3
  • Exports4
  • LanguageHaskell2010
  • LicenceBSD-3-Clause
  • SourceMetaData.hs
valueparseMetaData :: ByteString -> MetaData
#

Parse the package.json file found in a 01-index.tar tarball from Hackage with Data.Aeson. This function is a convenience wrapper around eitherDecode that throws an InvalidMetaFile exception to signal failure.

Example2 expressions
:set -XOverloadedStringsparseMetaData "{\"signatures\":[],\"signed\":{\"_type\":\"Targets\",\"expires\":null,\"targets\":{\"<repo>/package/jailbreak-cabal-1.3.2.tar.gz\":{\"hashes\":{\"md5\":\"ba42b3e68323ccbeb3ac900cd68f9e90\",\"sha256\":\"212a8bbc3dfc748c4063282414a2726709d651322f3984c9989179d2352950f4\"},\"length\":2269}},\"version\":0}}"MetaData {signed = SignedMetaData {version = 0, expires = Nothing, _type = "Targets", targets = fromList [("<repo>/package/jailbreak-cabal-1.3.2.tar.gz",TargetData {length = 2269, hashes = fromList [("md5","ba42b3e68323ccbeb3ac900cd68f9e90"),("sha256","212a8bbc3dfc748c4063282414a2726709d651322f3984c9989179d2352950f4")]})]}, signatures = []}
datadata MetaData
#

Constructors

Instances4Show, Generic, FromJSON, Rep
datadata SignedMetaData
#

Constructors

Instances4Show, Generic, FromJSON, Rep
datadata TargetData
#

Constructors

Instances4Show, Generic, FromJSON, Rep