nixpkgs/pkgs/build-support/upstream-updater/design.txt
Michael Raskin 4ba8f74591 Adding Gphoto2FS - filesystem for attached cameras
svn path=/nixpkgs/trunk/; revision=16841
2009-08-24 21:35:45 +00:00

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Next to file.nix we get src-for-file.nix
src-for-file.nix should evaluate to a flat attribute set with
string values.
It is supposed to be imported in the main expression.
In the ideal world it can export url, hash, version.
src-for-file.nix generation is directed by
src-info-for-file.nix.
Attributes:
src-info-for-file.nix:
downloadPage
sourceRegexp (default = '.*[.]tar[.].*')
choiceCommand (default = 'head -1')
versionExtractorSedScript (default = 's/.*-([0-9.]+)[.].*/\1/')
versionReferenceCreator (default = 's/-([0-9.]+)[.]/-${version}./')
mirrorSedScript (default = none)
src-for-file.nix:
advertisedUrl (its match is the check for update presence)
url
hash
version