Op Sun, 1 Mar 2015 20:36:54 -0300 Anderson Torres <[email protected]> schreef:
> 2015-03-01 15:16 GMT-03:00 Berno Strik <[email protected]>: > > Op Sun, 1 Mar 2015 12:21:04 -0300 > > Anderson Torres <[email protected]> schreef: > > > >> Hello, Nixers! > >> > >> How can I "fetchurl" a variable url? > >> > >> When I download a dockapp from Windowmaker site, like > >> > >> "http://windowmaker.org/dockapps/?download=wmSMPmon-3.1.tar.gz";, > >> > >> it in fact downloads something like "wmSMPmon-${a long string of > >> chars, like a checksum}.tar.gz". And the long string is > >> unpredictable. > >> > >> And when I run nix-prefetch-url > >> "http://windowmaker.org/dockapps/?download=wmSMPmon-3.1.tar.gz"; > >> more than once, it just outputs different hashes: > >> > >> > nix-prefetch-url > >> > http://windowmaker.org/dockapps/\?download\=wmSMPmon-3.1.tar.gz > >> % Total % Received % Xferd Average Speed Time Time > >> Time Current Dload Upload Total Spent Left Speed > >> 0 0 0 0 0 0 0 0 --:--:-- 0:00:01 > >> --:--:-- 0 100 24113 0 24113 0 0 3809 0 > >> --:--:-- 0:00:06 --:--:-- 5139 path is > >> ‘/nix/store/lqri8zgmwz3mbf3q07kp62zl81bc6fpq-?download=wmSMPmon-3.1.tar.gz’ > >> 104bcfj4j0vlnr4v1fzahgj9amccn1aq7rjcpy1jyqnq6lbrmc3g > >> > >> > nix-prefetch-url > >> > http://windowmaker.org/dockapps/\?download\=wmSMPmon-3.1.tar.gz > >> % Total % Received % Xferd Average Speed Time Time > >> Time Current Dload Upload Total Spent Left Speed > >> 0 0 0 0 0 0 0 0 --:--:-- --:--:-- > >> --:--:-- 0 100 24110 0 24110 0 0 3193 0 > >> --:--:-- 0:00:07 --:--:-- 3985 path is > >> ‘/nix/store/f2b7rksjfh6ajddjhx09xb0jzc04jxg9-?download=wmSMPmon-3.1.tar.gz’ > >> 1s01whvf51jrwdmrk3bdgysaa2rzmh56c9p0kv3ydxijaagvqi2x > >> > >> How can I download it? > > > > Use the following code: > > > > src = fetchgit { > > url = git://repo.or.cz/dockapps.git; > > rev = "38c74350b02f35824554ce0c4f0f251d71762040"; > > sha256 = > > "0g9cwhlqg065fbhav4g4n16a4cqkk9jykl3y0zwbn5whhacfqyhl"; }; > > > > Explanation: > > > > When you download a dockapp from Windowmaker site you are > > redirected to a git repo site where you get a snapshot out of it. > > The id of the snapshot is the long hexadecimal string you are > > getting. The above code does a checkout of the whole dockapp-git > > directory. The only thing you have left to do is point to the > > directory where your actual dockapp is: > > > > postUnpack = "sourceRoot=\${sourceRoot}/dockapp-dir"; > > > > So you are just saying we need to download all dockapps and build one > by one? > > It appears to be better handled with a "multiple-output derivation"! I > will do some research on Nix docs about it. > Yes this seemes the only solution if you want a stable checksum. The rev = "38c74350b02f35824554ce0c4f0f251d71762040" points to a very recent commit of the dockapp-git and this should always provide the same checksum. > >> _______________________________________________ > >> nix-dev mailing list > >> [email protected] > >> http://lists.science.uu.nl/mailman/listinfo/nix-dev > > > _______________________________________________ > nix-dev mailing list > [email protected] > http://lists.science.uu.nl/mailman/listinfo/nix-dev _______________________________________________ nix-dev mailing list [email protected] http://lists.science.uu.nl/mailman/listinfo/nix-dev
