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However care should be taken that the contents of the regions don't exceed a couple of lines so that its easy to see that its a region.That gz files are created (and not fetch Git etc) are used can be controversal: + fast download, always works (unless my mirror for those gz packages goes down) + fast updates because VCS updates are incremental + supports hack-nix - its harder to verify that I didn't manipulate the source packages - so you have to trust me.It seems to work reasonably well with the files I treid to convert so far (about 15 or so).Eelco Dolstra argued that the update information could be put into the meta description so that more ways of updating packages can be added. Also if you put update information into the meta attributes which are not passed to the builder there are many lines between the sorce declaration and the update information. description: pkgs/build-support/upstream-updater/Summary: The update information which basically consists of url of html page containing update links a regex extracting them is put into a file.A shell script then evaluates the expression gathering that data, downloading the page finding the latest version. When merging branches or deleting packages they cause more work.The updated information is then put in yet another file which is imported by Also many small files take longer to seek on non SSD disks and fill up more disk space ? I've put a clone of the script into my nixpkgs-utilities (gitorious) repository adding a --help option.

The comments contain information about how to update the region in a Nix attr like format. There are two phases for updating a package: (1) clone /update remote (git,hg,...) repository into a local directory and create gz for testing (2) upload gz publishing it Its you choosing between using the testing or published version by configuration option.Example taken from Ha Xe: src_haxe_swflib = { # REGION AUTO UPDATE: { name = "haxe_swflib"; type="cvs"; cvs Root = ":pserver:[email protected]:/cvsroot"; module = "ocaml/swflib"; groups = "haxe_group"; } src = source From Head "haxe_swflib-F_10-43-46gz" (fetchurl { url = " sha256 = "a63de75e48bf500ef0e8ef715d178d32f0ef113ded8c21bbca698a8cc70e7b58"; }); # END }.src; Marc Weber's comments: I wrote it and I still prefer it because the update information is nearby the source so you can't miss it.I plan to support Michael Raskins feature in the near future getting links by xpath from HTML pages selecting the newest version. v2 also uses evaluation so it also suffers from the configuration issue.It can be installed easily using the nixpkgs-haskell-overlay mailinglist first version mailinglist v2, based on Ludo's ideas? Tobias Hunger's comments: The script extracts the following attributes from the XML: There is no extra update information is needed inside the nix expressions.

Then Hydra builds every new versions and check, if it passes the unit tests and builds. --Davidak (talk) , 4 September 2015 (CEST) The following implementations exist: For full information read the original thread mailinglist Summary: nix-instantiate evaluates nixpkgs.The resulting (huge) XML is parsed by a scheme helper application finding gnu packages and updating their sources. However it depends on evaluation of nixpkgs which can be different depending on configuration options.



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