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Add an HTTP binary cache store

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Allowing stuff like

  NIX_REMOTE=https://cache.nixos.org nix-store -qR /nix/store/x1p1gl3a4kkz5ci0nfbayjqlqmczp1kq-geeqie-1.1

or

  NIX_REMOTE=https://cache.nixos.org nix-store --export /nix/store/x1p1gl3a4kkz5ci0nfbayjqlqmczp1kq-geeqie-1.1 | nix-store --import
This commit is contained in:
Eelco Dolstra 2016-02-29 18:15:20 +01:00
parent 6170bb474b
commit e9c50064b5
7 changed files with 102 additions and 61 deletions
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23
src/libstore/download.hh
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@ -10,7 +10,8 @@ struct DownloadOptions
{
string expectedETag;
bool verifyTLS{true};
bool forceProgress{false};
enum { yes, no, automatic } showProgress{yes};
bool head{false};
};
struct DownloadResult
@ -21,11 +22,25 @@ struct DownloadResult
class Store;
DownloadResult downloadFile(string url, const DownloadOptions & options);
struct Downloader
{
virtual DownloadResult download(string url, const DownloadOptions & options) = 0;
Path downloadFileCached(ref<Store> store, const string & url, bool unpack);
Path downloadCached(ref<Store> store, const string & url, bool unpack);
MakeError(DownloadError, Error)
enum Error { NotFound, Forbidden, Misc };
};
ref<Downloader> makeDownloader();
class DownloadError : public Error
{
public:
Downloader::Error error;
DownloadError(Downloader::Error error, const FormatOrString & fs)
: Error(fs), error(error)
{ }
};
bool isUri(const string & s);