Re: [Nix-dev] Fetching variable and unpredictable URL download link
Hi,
On 01/03/15 16:21, Anderson Torres wrote:
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-${a long string of
chars, like a checksum}.tar.gz. And the long string is unpredictable.
You can use fetchzip instead:
fetchzip rec {
name = wmSMPmon-3.1.tar.gz;
url = http://windowmaker.org/dockapps/?download=${name};;
sha256 = 1ahp2vg6w3pzg0aar61gm122q37ljhd8ni6g0p1vp0x1wbavgljl;
}
It calculates the hash over the unpacked data, so changes in the mtime fields of
the archive and other metadata don't matter.
--
Eelco Dolstra | LogicBlox, Inc. | http://nixos.org/~eelco/
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Re: [Nix-dev] Fetching variable and unpredictable URL download link
2015-03-01 15:16 GMT-03:00 Berno Strik dutchma...@gmx.com:
Op Sun, 1 Mar 2015 12:21:04 -0300
Anderson Torres torres.anderson...@gmail.com 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 TimeTime
Time Current Dload Upload Total SpentLeft Speed
0 00 00 0 0 0 --:--:-- 0:00:01
--:--:-- 0 100 241130 241130 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 TimeTime
Time Current Dload Upload Total SpentLeft Speed
0 00 00 0 0 0 --:--:-- --:--:--
--:--:-- 0 100 241100 241100 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.
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Re: [Nix-dev] Fetching variable and unpredictable URL download link
2015-03-01 15:21 GMT-03:00 Harald van Dijk har...@gigawatt.nl:
Hi,
The problem here is not with the file names, but that you don't actually get
the same file every time. The file is generated by the server on-the-fly,
and the mtimes of the files in the download you get depend on the precise
moment you download it, as you can tell by inspecting the output of
tar tvf $download
This is fundamentally incompatible with any package manager that checks that
source archives are downloaded correctly.
The original website
http://lancre.ribbrock.org/en/binabit_en/wmsmpmon_en/wmsmpmon-changelog_en.html
appears to link to a stable archive that you should be able to use instead.
The problem here is: some dockapps have no official site anymore. In
fact, there are some with links to Web Archive!
But the idea of Breno is cool! I will try it.
Cheers,
Harald van Dijk
On 03/01/2015 04:21 PM, Anderson Torres wrote:
Hello, Nixers!
How can I fetchurl a variable url?
When I download a dockapp from Windowmaker site, like
http://windowmaker.org/dockapps/?download=wmSMPmon-3.1.tar.gz;,
it in fact downloads something like wmSMPmon-${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 TimeTime Time
Current
Dload Upload Total SpentLeft
Speed
0 00 00 0 0 0 --:--:-- 0:00:01 --:--:--
0
100 241130 241130 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 TimeTime Time
Current
Dload Upload Total SpentLeft
Speed
0 00 00 0 0 0 --:--:-- --:--:-- --:--:--
0
100 241100 241100 0 3193 0 --:--:-- 0:00:07 --:--:--
3985
path is
‘/nix/store/f2b7rksjfh6ajddjhx09xb0jzc04jxg9-?download=wmSMPmon-3.1.tar.gz’
1s01whvf51jrwdmrk3bdgysaa2rzmh56c9p0kv3ydxijaagvqi2x
How can I download it?
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Re: [Nix-dev] Fetching variable and unpredictable URL download link
Op Sun, 1 Mar 2015 12:21:04 -0300
Anderson Torres torres.anderson...@gmail.com 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 TimeTime
Time Current Dload Upload Total SpentLeft Speed
0 00 00 0 0 0 --:--:-- 0:00:01
--:--:-- 0 100 241130 241130 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 TimeTime
Time Current Dload Upload Total SpentLeft Speed
0 00 00 0 0 0 --:--:-- --:--:--
--:--:-- 0 100 241100 241100 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;
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Re: [Nix-dev] Fetching variable and unpredictable URL download link
Hi,
The problem here is not with the file names, but that you don't actually
get the same file every time. The file is generated by the server
on-the-fly, and the mtimes of the files in the download you get depend
on the precise moment you download it, as you can tell by inspecting the
output of
tar tvf $download
This is fundamentally incompatible with any package manager that checks
that source archives are downloaded correctly.
The original website
http://lancre.ribbrock.org/en/binabit_en/wmsmpmon_en/wmsmpmon-changelog_en.html
appears to link to a stable archive that you should be able to use instead.
Cheers,
Harald van Dijk
On 03/01/2015 04:21 PM, Anderson Torres wrote:
Hello, Nixers!
How can I fetchurl a variable url?
When I download a dockapp from Windowmaker site, like
http://windowmaker.org/dockapps/?download=wmSMPmon-3.1.tar.gz;,
it in fact downloads something like wmSMPmon-${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 TimeTime Time
Current
Dload Upload Total SpentLeft Speed
0 00 00 0 0 0 --:--:-- 0:00:01 --:--:-- 0
100 241130 241130 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 TimeTime Time
Current
Dload Upload Total SpentLeft Speed
0 00 00 0 0 0 --:--:-- --:--:-- --:--:-- 0
100 241100 241100 0 3193 0 --:--:-- 0:00:07 --:--:-- 3985
path is
‘/nix/store/f2b7rksjfh6ajddjhx09xb0jzc04jxg9-?download=wmSMPmon-3.1.tar.gz’
1s01whvf51jrwdmrk3bdgysaa2rzmh56c9p0kv3ydxijaagvqi2x
How can I download it?
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