47 lines
1.4 KiB
C++
47 lines
1.4 KiB
C++
#include "builtins.hh"
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#include "download.hh"
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#include "store-api.hh"
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#include "archive.hh"
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#include "compression.hh"
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namespace nix {
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void builtinFetchurl(const BasicDerivation & drv)
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{
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auto url = drv.env.find("url");
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if (url == drv.env.end()) throw Error("attribute ‘url’ missing");
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/* No need to do TLS verification, because we check the hash of
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the result anyway. */
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DownloadOptions options;
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options.verifyTLS = false;
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/* Show a progress indicator, even though stderr is not a tty. */
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options.showProgress = DownloadOptions::yes;
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auto data = makeDownloader()->download(url->second, options);
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assert(data.data);
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auto out = drv.env.find("out");
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if (out == drv.env.end()) throw Error("attribute ‘url’ missing");
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Path storePath = out->second;
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auto unpack = drv.env.find("unpack");
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if (unpack != drv.env.end() && unpack->second == "1") {
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if (string(*data.data, 0, 6) == string("\xfd" "7zXZ\0", 6))
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data.data = decompress("xz", *data.data);
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StringSource source(*data.data);
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restorePath(storePath, source);
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} else
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writeFile(storePath, *data.data);
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auto executable = drv.env.find("executable");
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if (executable != drv.env.end() && executable->second == "1") {
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if (chmod(storePath.c_str(), 0755) == -1)
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throw SysError(format("making ‘%1%’ executable") % storePath);
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}
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}
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}
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