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Get rid of downloadCached()

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Everything uses the generic caching system now.
This commit is contained in:
Eelco Dolstra 2020-03-18 17:23:56 +01:00
parent c5ec95e2c7
commit f6ddf48882
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GPG key ID: 8170B4726D7198DE
9 changed files with 113 additions and 260 deletions
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8
src/libexpr/common-eval-args.cc
View file

@ -4,7 +4,9 @@
#include "util.hh"
#include "eval.hh"
#include "fetchers/registry.hh"
#include "fetchers/fetchers.hh"
#include "flake/flakeref.hh"
#include "store-api.hh"
namespace nix {
@ -68,9 +70,9 @@ Bindings * MixEvalArgs::getAutoArgs(EvalState & state)
Path lookupFileArg(EvalState & state, string s)
{
if (isUri(s)) {
CachedDownloadRequest request(s);
request.unpack = true;
return getDownloader()->downloadCached(state.store, request).path;
return state.store->toRealPath(
fetchers::downloadTarball(
state.store, resolveUri(s), "source", false).storePath);
} else if (s.size() > 2 && s.at(0) == '<' && s.at(s.size() - 1) == '>') {
Path p = s.substr(1, s.size() - 2);
return state.findFile(p);

6
src/libexpr/parser.y
View file

@ -545,6 +545,7 @@ formal
#include "eval.hh"
#include "download.hh"
#include "fetchers/fetchers.hh"
#include "store-api.hh"
@ -687,9 +688,8 @@ std::pair<bool, std::string> EvalState::resolveSearchPathElem(const SearchPathEl
if (isUri(elem.second)) {
try {
CachedDownloadRequest request(elem.second);
request.unpack = true;
res = { true, getDownloader()->downloadCached(store, request).path };
res = { true, store->toRealPath(fetchers::downloadTarball(
store, resolveUri(elem.second), "source", false).storePath) };
} catch (DownloadError & e) {
printError(format("warning: Nix search path entry '%1%' cannot be downloaded, ignoring") % elem.second);
res = { false, "" };

67
src/libexpr/primops.cc
View file

@ -1,6 +1,5 @@
#include "archive.hh"
#include "derivations.hh"
#include "download.hh"
#include "eval-inline.hh"
#include "eval.hh"
#include "globals.hh"
@ -2046,68 +2045,6 @@ static void prim_splitVersion(EvalState & state, const Pos & pos, Value * * args
}
/*************************************************************
* Networking
*************************************************************/
void fetch(EvalState & state, const Pos & pos, Value * * args, Value & v,
const string & who, bool unpack, const std::string & defaultName)
{
CachedDownloadRequest request("");
request.unpack = unpack;
request.name = defaultName;
state.forceValue(*args[0]);
if (args[0]->type == tAttrs) {
state.forceAttrs(*args[0], pos);
for (auto & attr : *args[0]->attrs) {
string n(attr.name);
if (n == "url")
request.uri = state.forceStringNoCtx(*attr.value, *attr.pos);
else if (n == "sha256")
request.expectedHash = Hash(state.forceStringNoCtx(*attr.value, *attr.pos), htSHA256);
else if (n == "name")
request.name = state.forceStringNoCtx(*attr.value, *attr.pos);
else
throw EvalError(format("unsupported argument '%1%' to '%2%', at %3%") % attr.name % who % attr.pos);
}
if (request.uri.empty())
throw EvalError(format("'url' argument required, at %1%") % pos);
} else
request.uri = state.forceStringNoCtx(*args[0], pos);
state.checkURI(request.uri);
if (evalSettings.pureEval && !request.expectedHash)
throw Error("in pure evaluation mode, '%s' requires a 'sha256' argument", who);
auto res = getDownloader()->downloadCached(state.store, request);
if (state.allowedPaths)
state.allowedPaths->insert(res.path);
mkString(v, res.storePath, PathSet({res.storePath}));
}
static void prim_fetchurl(EvalState & state, const Pos & pos, Value * * args, Value & v)
{
fetch(state, pos, args, v, "fetchurl", false, "");
}
static void prim_fetchTarball(EvalState & state, const Pos & pos, Value * * args, Value & v)
{
fetch(state, pos, args, v, "fetchTarball", true, "source");
}
/*************************************************************
* Primop registration
*************************************************************/
@ -2290,10 +2227,6 @@ void EvalState::createBaseEnv()
addPrimOp("derivationStrict", 1, prim_derivationStrict);
addPrimOp("placeholder", 1, prim_placeholder);
// Networking
addPrimOp("__fetchurl", 1, prim_fetchurl);
addPrimOp("fetchTarball", 1, prim_fetchTarball);
/* Add a wrapper around the derivation primop that computes the
`drvPath' and `outPath' attributes lazily. */
string path = canonPath(settings.nixDataDir + "/nix/corepkgs/derivation.nix", true);

77
src/libexpr/primops/fetchTree.cc
View file

@ -3,6 +3,7 @@
#include "store-api.hh"
#include "fetchers/fetchers.hh"
#include "fetchers/registry.hh"
#include "download.hh"
#include <ctime>
#include <iomanip>
@ -89,4 +90,80 @@ static void prim_fetchTree(EvalState & state, const Pos & pos, Value * * args, V
static RegisterPrimOp r("fetchTree", 1, prim_fetchTree);
static void fetch(EvalState & state, const Pos & pos, Value * * args, Value & v,
const string & who, bool unpack, std::string name)
{
std::optional<std::string> url;
std::optional<Hash> expectedHash;
state.forceValue(*args[0]);
if (args[0]->type == tAttrs) {
state.forceAttrs(*args[0], pos);
for (auto & attr : *args[0]->attrs) {
string n(attr.name);
if (n == "url")
url = state.forceStringNoCtx(*attr.value, *attr.pos);
else if (n == "sha256")
expectedHash = Hash(state.forceStringNoCtx(*attr.value, *attr.pos), htSHA256);
else if (n == "name")
name = state.forceStringNoCtx(*attr.value, *attr.pos);
else
throw EvalError("unsupported argument '%s' to '%s', at %s",
attr.name, who, attr.pos);
}
if (!url)
throw EvalError("'url' argument required, at %s", pos);
} else
url = state.forceStringNoCtx(*args[0], pos);
url = resolveUri(*url);
state.checkURI(*url);
if (name == "")
name = baseNameOf(*url);
if (evalSettings.pureEval && !expectedHash)
throw Error("in pure evaluation mode, '%s' requires a 'sha256' argument", who);
auto storePath =
unpack
? fetchers::downloadTarball(state.store, *url, name, (bool) expectedHash).storePath
: fetchers::downloadFile(state.store, *url, name, (bool) expectedHash).storePath;
auto path = state.store->toRealPath(storePath);
if (expectedHash) {
auto hash = unpack
? state.store->queryPathInfo(storePath)->narHash
: hashFile(htSHA256, path);
if (hash != *expectedHash)
throw Error((unsigned int) 102, "hash mismatch in file downloaded from '%s':\n wanted: %s\n got: %s",
*url, expectedHash->to_string(), hash.to_string());
}
if (state.allowedPaths)
state.allowedPaths->insert(path);
mkString(v, path, PathSet({path}));
}
static void prim_fetchurl(EvalState & state, const Pos & pos, Value * * args, Value & v)
{
fetch(state, pos, args, v, "fetchurl", false, "");
}
static void prim_fetchTarball(EvalState & state, const Pos & pos, Value * * args, Value & v)
{
fetch(state, pos, args, v, "fetchTarball", true, "source");
}
static RegisterPrimOp r2("__fetchurl", 1, prim_fetchurl);
static RegisterPrimOp r3("fetchTarball", 1, prim_fetchTarball);
}