about summary refs log blame commit diff
path: root/src/libstore/builtins.cc
blob: c2763f1ab4d897d3c8f55b9a80212b0338afc20f (plain) (tree)
1
2
3
4
5
6
7
8
9
10
11
12

                      

                       
                         






                                                                         





                                                                   
                                                                     
                                                
 
                                                                 
                      


                                                                         

                                 


                                                           
                                                                   
                                                     
                                        

                                       
                                         
 
                                                 
                                                                   

                                                                              



     
#include "builtins.hh"
#include "download.hh"
#include "store-api.hh"
#include "archive.hh"
#include "compression.hh"

namespace nix {

void builtinFetchurl(const BasicDerivation & drv)
{
    auto url = drv.env.find("url");
    if (url == drv.env.end()) throw Error("attribute ‘url’ missing");

    /* No need to do TLS verification, because we check the hash of
       the result anyway. */
    DownloadOptions options;
    options.verifyTLS = false;

    /* Show a progress indicator, even though stderr is not a tty. */
    options.showProgress = DownloadOptions::yes;

    auto data = makeDownloader()->download(url->second, options);
    assert(data.data);

    auto out = drv.env.find("out");
    if (out == drv.env.end()) throw Error("attribute ‘url’ missing");

    Path storePath = out->second;

    auto unpack = drv.env.find("unpack");
    if (unpack != drv.env.end() && unpack->second == "1") {
        if (string(*data.data, 0, 6) == string("\xfd" "7zXZ\0", 6))
            data.data = decompress("xz", *data.data);
        StringSource source(*data.data);
        restorePath(storePath, source);
    } else
        writeFile(storePath, *data.data);

    auto executable = drv.env.find("executable");
    if (executable != drv.env.end() && executable->second == "1") {
        if (chmod(storePath.c_str(), 0755) == -1)
            throw SysError(format("making ‘%1%’ executable") % storePath);
    }
}

}