forked from lix-project/lix
996 lines
29 KiB
C++
996 lines
29 KiB
C++
#include "crypto.hh"
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#include "globals.hh"
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#include "store-api.hh"
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#include "util.hh"
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#include "nar-info-disk-cache.hh"
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#include "thread-pool.hh"
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#include "json.hh"
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#include "derivations.hh"
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#include <future>
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namespace nix {
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bool Store::isInStore(const Path & path) const
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{
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return isInDir(path, storeDir);
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}
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bool Store::isStorePath(const Path & path) const
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{
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return isInStore(path)
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&& path.size() >= storeDir.size() + 1 + storePathHashLen
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&& path.find('/', storeDir.size() + 1) == Path::npos;
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}
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void Store::assertStorePath(const Path & path) const
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{
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if (!isStorePath(path))
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throw Error(format("path '%1%' is not in the Nix store") % path);
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}
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Path Store::toStorePath(const Path & path) const
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{
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if (!isInStore(path))
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throw Error(format("path '%1%' is not in the Nix store") % path);
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Path::size_type slash = path.find('/', storeDir.size() + 1);
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if (slash == Path::npos)
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return path;
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else
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return Path(path, 0, slash);
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}
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Path Store::followLinksToStore(const Path & _path) const
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{
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Path path = absPath(_path);
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while (!isInStore(path)) {
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if (!isLink(path)) break;
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string target = readLink(path);
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path = absPath(target, dirOf(path));
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}
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if (!isInStore(path))
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throw Error(format("path '%1%' is not in the Nix store") % path);
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return path;
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}
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Path Store::followLinksToStorePath(const Path & path) const
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{
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return toStorePath(followLinksToStore(path));
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}
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string storePathToName(const Path & path)
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{
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auto base = baseNameOf(path);
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assert(base.size() == storePathHashLen || (base.size() > storePathHashLen && base[storePathHashLen] == '-'));
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return base.size() == storePathHashLen ? "" : string(base, storePathHashLen + 1);
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}
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string storePathToHash(const Path & path)
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{
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auto base = baseNameOf(path);
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assert(base.size() >= storePathHashLen);
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return string(base, 0, storePathHashLen);
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}
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void checkStoreName(const string & name)
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{
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string validChars = "+-._?=";
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auto baseError = format("The path name '%2%' is invalid: %3%. "
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"Path names are alphanumeric and can include the symbols %1% "
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"and must not begin with a period. "
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"Note: If '%2%' is a source file and you cannot rename it on "
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"disk, 'builtins.path { name = ... }' can be used to give it an "
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"alternative name.") % validChars % name;
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if (name.empty())
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throw Error(baseError % "it is an empty string");
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/* Disallow names starting with a dot for possible security
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reasons (e.g., "." and ".."). */
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if (name[0] == '.')
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throw Error(baseError % "it is illegal to start the name with a period");
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/* Disallow names longer than 211 characters. ext4’s max is 256,
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but we need extra space for the hash and .chroot extensions. */
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if (name.length() > 211)
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throw Error(baseError % "name must be less than 212 characters");
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for (auto & i : name)
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if (!((i >= 'A' && i <= 'Z') ||
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(i >= 'a' && i <= 'z') ||
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(i >= '0' && i <= '9') ||
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validChars.find(i) != string::npos))
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{
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throw Error(baseError % (format("the '%1%' character is invalid") % i));
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}
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}
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/* Store paths have the following form:
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<store>/<h>-<name>
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where
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<store> = the location of the Nix store, usually /nix/store
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<name> = a human readable name for the path, typically obtained
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from the name attribute of the derivation, or the name of the
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source file from which the store path is created. For derivation
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outputs other than the default "out" output, the string "-<id>"
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is suffixed to <name>.
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<h> = base-32 representation of the first 160 bits of a SHA-256
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hash of <s>; the hash part of the store name
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<s> = the string "<type>:sha256:<h2>:<store>:<name>";
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note that it includes the location of the store as well as the
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name to make sure that changes to either of those are reflected
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in the hash (e.g. you won't get /nix/store/<h>-name1 and
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/nix/store/<h>-name2 with equal hash parts).
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<type> = one of:
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"text:<r1>:<r2>:...<rN>"
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for plain text files written to the store using
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addTextToStore(); <r1> ... <rN> are the references of the
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path.
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"source"
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for paths copied to the store using addToStore() when recursive
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= true and hashAlgo = "sha256"
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"output:<id>"
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for either the outputs created by derivations, OR paths copied
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to the store using addToStore() with recursive != true or
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hashAlgo != "sha256" (in that case "source" is used; it's
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silly, but it's done that way for compatibility). <id> is the
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name of the output (usually, "out").
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<h2> = base-16 representation of a SHA-256 hash of:
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if <type> = "text:...":
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the string written to the resulting store path
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if <type> = "source":
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the serialisation of the path from which this store path is
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copied, as returned by hashPath()
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if <type> = "output:<id>":
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for non-fixed derivation outputs:
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the derivation (see hashDerivationModulo() in
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primops.cc)
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for paths copied by addToStore() or produced by fixed-output
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derivations:
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the string "fixed:out:<rec><algo>:<hash>:", where
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<rec> = "r:" for recursive (path) hashes, or "" for flat
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(file) hashes
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<algo> = "md5", "sha1" or "sha256"
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<hash> = base-16 representation of the path or flat hash of
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the contents of the path (or expected contents of the
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path for fixed-output derivations)
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It would have been nicer to handle fixed-output derivations under
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"source", e.g. have something like "source:<rec><algo>", but we're
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stuck with this for now...
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The main reason for this way of computing names is to prevent name
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collisions (for security). For instance, it shouldn't be feasible
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to come up with a derivation whose output path collides with the
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path for a copied source. The former would have a <s> starting with
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"output:out:", while the latter would have a <s> starting with
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"source:".
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*/
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Path Store::makeStorePath(const string & type,
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const Hash & hash, const string & name) const
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{
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/* e.g., "source:sha256:1abc...:/nix/store:foo.tar.gz" */
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string s = type + ":" + hash.to_string(Base16) + ":" + storeDir + ":" + name;
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checkStoreName(name);
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return storeDir + "/"
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+ compressHash(hashString(htSHA256, s), 20).to_string(Base32, false)
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+ "-" + name;
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}
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Path Store::makeOutputPath(const string & id,
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const Hash & hash, const string & name) const
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{
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return makeStorePath("output:" + id, hash,
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name + (id == "out" ? "" : "-" + id));
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}
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static std::string makeType(string && type, const PathSet & references)
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{
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for (auto & i : references) {
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type += ":";
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type += i;
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}
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return type;
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}
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Path Store::makeFixedOutputPath(bool recursive,
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const Hash & hash, const string & name, const PathSet & references) const
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{
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if (hash.type == htSHA256 && recursive) {
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return makeStorePath(makeType("source", references), hash, name);
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} else {
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assert(references.empty());
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return makeStorePath("output:out", hashString(htSHA256,
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"fixed:out:" + (recursive ? (string) "r:" : "") +
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hash.to_string(Base16) + ":"), name);
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}
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}
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Path Store::makeTextPath(const string & name, const Hash & hash,
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const PathSet & references) const
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{
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assert(hash.type == htSHA256);
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/* Stuff the references (if any) into the type. This is a bit
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hacky, but we can't put them in `s' since that would be
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ambiguous. */
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return makeStorePath(makeType("text", references), hash, name);
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}
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std::pair<Path, Hash> Store::computeStorePathForPath(const string & name,
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const Path & srcPath, bool recursive, HashType hashAlgo, PathFilter & filter) const
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{
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Hash h = recursive ? hashPath(hashAlgo, srcPath, filter).first : hashFile(hashAlgo, srcPath);
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Path dstPath = makeFixedOutputPath(recursive, h, name);
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return std::pair<Path, Hash>(dstPath, h);
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}
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Path Store::computeStorePathForText(const string & name, const string & s,
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const PathSet & references) const
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{
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return makeTextPath(name, hashString(htSHA256, s), references);
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}
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Store::Store(const Params & params)
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: Config(params)
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, state({(size_t) pathInfoCacheSize})
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{
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}
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std::string Store::getUri()
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{
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return "";
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}
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bool Store::isValidPath(const Path & storePath)
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{
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assertStorePath(storePath);
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auto hashPart = storePathToHash(storePath);
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{
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auto state_(state.lock());
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auto res = state_->pathInfoCache.get(hashPart);
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if (res) {
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stats.narInfoReadAverted++;
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return *res != 0;
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}
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}
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if (diskCache) {
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auto res = diskCache->lookupNarInfo(getUri(), hashPart);
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if (res.first != NarInfoDiskCache::oUnknown) {
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stats.narInfoReadAverted++;
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auto state_(state.lock());
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state_->pathInfoCache.upsert(hashPart,
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res.first == NarInfoDiskCache::oInvalid ? 0 : res.second);
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return res.first == NarInfoDiskCache::oValid;
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}
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}
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bool valid = isValidPathUncached(storePath);
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if (diskCache && !valid)
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// FIXME: handle valid = true case.
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diskCache->upsertNarInfo(getUri(), hashPart, 0);
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return valid;
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}
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/* Default implementation for stores that only implement
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queryPathInfoUncached(). */
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bool Store::isValidPathUncached(const Path & path)
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{
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try {
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queryPathInfo(path);
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return true;
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} catch (InvalidPath &) {
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return false;
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}
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}
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ref<const ValidPathInfo> Store::queryPathInfo(const Path & storePath)
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{
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std::promise<ref<const ValidPathInfo>> promise;
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queryPathInfo(storePath,
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{[&](std::future<ref<const ValidPathInfo>> result) {
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try {
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promise.set_value(result.get());
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} catch (...) {
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promise.set_exception(std::current_exception());
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}
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}});
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return promise.get_future().get();
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}
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void Store::queryPathInfo(const Path & storePath,
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Callback<ref<const ValidPathInfo>> callback) noexcept
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{
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std::string hashPart;
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try {
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assertStorePath(storePath);
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hashPart = storePathToHash(storePath);
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{
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auto res = state.lock()->pathInfoCache.get(hashPart);
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if (res) {
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stats.narInfoReadAverted++;
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if (!*res)
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throw InvalidPath(format("path '%s' is not valid") % storePath);
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return callback(ref<const ValidPathInfo>(*res));
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}
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}
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if (diskCache) {
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auto res = diskCache->lookupNarInfo(getUri(), hashPart);
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if (res.first != NarInfoDiskCache::oUnknown) {
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stats.narInfoReadAverted++;
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{
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auto state_(state.lock());
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state_->pathInfoCache.upsert(hashPart,
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res.first == NarInfoDiskCache::oInvalid ? 0 : res.second);
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if (res.first == NarInfoDiskCache::oInvalid ||
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(res.second->path != storePath && storePathToName(storePath) != ""))
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throw InvalidPath(format("path '%s' is not valid") % storePath);
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}
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return callback(ref<const ValidPathInfo>(res.second));
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}
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}
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} catch (...) { return callback.rethrow(); }
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auto callbackPtr = std::make_shared<decltype(callback)>(std::move(callback));
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queryPathInfoUncached(storePath,
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{[this, storePath, hashPart, callbackPtr](std::future<std::shared_ptr<const ValidPathInfo>> fut) {
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try {
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auto info = fut.get();
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if (diskCache)
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diskCache->upsertNarInfo(getUri(), hashPart, info);
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{
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auto state_(state.lock());
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state_->pathInfoCache.upsert(hashPart, info);
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}
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if (!info
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|| (info->path != storePath && storePathToName(storePath) != ""))
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{
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stats.narInfoMissing++;
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throw InvalidPath("path '%s' is not valid", storePath);
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}
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(*callbackPtr)(ref<const ValidPathInfo>(info));
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} catch (...) { callbackPtr->rethrow(); }
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}});
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}
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PathSet Store::queryValidPaths(const PathSet & paths, SubstituteFlag maybeSubstitute)
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{
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struct State
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{
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size_t left;
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PathSet valid;
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std::exception_ptr exc;
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};
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Sync<State> state_(State{paths.size(), PathSet()});
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std::condition_variable wakeup;
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ThreadPool pool;
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auto doQuery = [&](const Path & path ) {
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checkInterrupt();
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queryPathInfo(path, {[path, &state_, &wakeup](std::future<ref<const ValidPathInfo>> fut) {
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auto state(state_.lock());
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try {
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auto info = fut.get();
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state->valid.insert(path);
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} catch (InvalidPath &) {
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} catch (...) {
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state->exc = std::current_exception();
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}
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assert(state->left);
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if (!--state->left)
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wakeup.notify_one();
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}});
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};
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for (auto & path : paths)
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pool.enqueue(std::bind(doQuery, path));
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pool.process();
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while (true) {
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auto state(state_.lock());
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if (!state->left) {
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if (state->exc) std::rethrow_exception(state->exc);
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return state->valid;
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}
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state.wait(wakeup);
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}
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}
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/* Return a string accepted by decodeValidPathInfo() that
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registers the specified paths as valid. Note: it's the
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responsibility of the caller to provide a closure. */
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string Store::makeValidityRegistration(const PathSet & paths,
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bool showDerivers, bool showHash)
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{
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string s = "";
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for (auto & i : paths) {
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s += i + "\n";
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auto info = queryPathInfo(i);
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if (showHash) {
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s += info->narHash.to_string(Base16, false) + "\n";
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s += (format("%1%\n") % info->narSize).str();
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}
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Path deriver = showDerivers ? info->deriver : "";
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s += deriver + "\n";
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s += (format("%1%\n") % info->references.size()).str();
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for (auto & j : info->references)
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s += j + "\n";
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}
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return s;
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}
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void Store::pathInfoToJSON(JSONPlaceholder & jsonOut, const PathSet & storePaths,
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bool includeImpureInfo, bool showClosureSize, AllowInvalidFlag allowInvalid)
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{
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auto jsonList = jsonOut.list();
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for (auto storePath : storePaths) {
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auto jsonPath = jsonList.object();
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jsonPath.attr("path", storePath);
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try {
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auto info = queryPathInfo(storePath);
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storePath = info->path;
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jsonPath
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.attr("narHash", info->narHash.to_string())
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.attr("narSize", info->narSize);
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{
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auto jsonRefs = jsonPath.list("references");
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for (auto & ref : info->references)
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jsonRefs.elem(ref);
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}
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if (info->ca != "")
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jsonPath.attr("ca", info->ca);
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std::pair<uint64_t, uint64_t> closureSizes;
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if (showClosureSize) {
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closureSizes = getClosureSize(storePath);
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jsonPath.attr("closureSize", closureSizes.first);
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}
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if (includeImpureInfo) {
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if (info->deriver != "")
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jsonPath.attr("deriver", info->deriver);
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if (info->registrationTime)
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jsonPath.attr("registrationTime", info->registrationTime);
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if (info->ultimate)
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jsonPath.attr("ultimate", info->ultimate);
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if (!info->sigs.empty()) {
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auto jsonSigs = jsonPath.list("signatures");
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for (auto & sig : info->sigs)
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jsonSigs.elem(sig);
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}
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auto narInfo = std::dynamic_pointer_cast<const NarInfo>(
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std::shared_ptr<const ValidPathInfo>(info));
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if (narInfo) {
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if (!narInfo->url.empty())
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jsonPath.attr("url", narInfo->url);
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if (narInfo->fileHash)
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jsonPath.attr("downloadHash", narInfo->fileHash.to_string());
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if (narInfo->fileSize)
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jsonPath.attr("downloadSize", narInfo->fileSize);
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if (showClosureSize)
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jsonPath.attr("closureDownloadSize", closureSizes.second);
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}
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||
}
|
||
|
||
} catch (InvalidPath &) {
|
||
jsonPath.attr("valid", false);
|
||
}
|
||
}
|
||
}
|
||
|
||
|
||
std::pair<uint64_t, uint64_t> Store::getClosureSize(const Path & storePath)
|
||
{
|
||
uint64_t totalNarSize = 0, totalDownloadSize = 0;
|
||
PathSet closure;
|
||
computeFSClosure(storePath, closure, false, false);
|
||
for (auto & p : closure) {
|
||
auto info = queryPathInfo(p);
|
||
totalNarSize += info->narSize;
|
||
auto narInfo = std::dynamic_pointer_cast<const NarInfo>(
|
||
std::shared_ptr<const ValidPathInfo>(info));
|
||
if (narInfo)
|
||
totalDownloadSize += narInfo->fileSize;
|
||
}
|
||
return {totalNarSize, totalDownloadSize};
|
||
}
|
||
|
||
|
||
const Store::Stats & Store::getStats()
|
||
{
|
||
{
|
||
auto state_(state.lock());
|
||
stats.pathInfoCacheSize = state_->pathInfoCache.size();
|
||
}
|
||
return stats;
|
||
}
|
||
|
||
|
||
void Store::buildPaths(const PathSet & paths, BuildMode buildMode)
|
||
{
|
||
for (auto & path : paths)
|
||
if (isDerivation(path))
|
||
unsupported("buildPaths");
|
||
|
||
if (queryValidPaths(paths).size() != paths.size())
|
||
unsupported("buildPaths");
|
||
}
|
||
|
||
|
||
void copyStorePath(ref<Store> srcStore, ref<Store> dstStore,
|
||
const Path & storePath, RepairFlag repair, CheckSigsFlag checkSigs)
|
||
{
|
||
auto srcUri = srcStore->getUri();
|
||
auto dstUri = dstStore->getUri();
|
||
|
||
Activity act(*logger, lvlInfo, actCopyPath,
|
||
srcUri == "local" || srcUri == "daemon"
|
||
? fmt("copying path '%s' to '%s'", storePath, dstUri)
|
||
: dstUri == "local" || dstUri == "daemon"
|
||
? fmt("copying path '%s' from '%s'", storePath, srcUri)
|
||
: fmt("copying path '%s' from '%s' to '%s'", storePath, srcUri, dstUri),
|
||
{storePath, srcUri, dstUri});
|
||
PushActivity pact(act.id);
|
||
|
||
auto info = srcStore->queryPathInfo(storePath);
|
||
|
||
uint64_t total = 0;
|
||
|
||
if (!info->narHash) {
|
||
StringSink sink;
|
||
srcStore->narFromPath({storePath}, sink);
|
||
auto info2 = make_ref<ValidPathInfo>(*info);
|
||
info2->narHash = hashString(htSHA256, *sink.s);
|
||
if (!info->narSize) info2->narSize = sink.s->size();
|
||
if (info->ultimate) info2->ultimate = false;
|
||
info = info2;
|
||
|
||
StringSource source(*sink.s);
|
||
dstStore->addToStore(*info, source, repair, checkSigs);
|
||
return;
|
||
}
|
||
|
||
if (info->ultimate) {
|
||
auto info2 = make_ref<ValidPathInfo>(*info);
|
||
info2->ultimate = false;
|
||
info = info2;
|
||
}
|
||
|
||
auto source = sinkToSource([&](Sink & sink) {
|
||
LambdaSink wrapperSink([&](const unsigned char * data, size_t len) {
|
||
sink(data, len);
|
||
total += len;
|
||
act.progress(total, info->narSize);
|
||
});
|
||
srcStore->narFromPath({storePath}, wrapperSink);
|
||
}, [&]() {
|
||
throw EndOfFile("NAR for '%s' fetched from '%s' is incomplete", storePath, srcStore->getUri());
|
||
});
|
||
|
||
dstStore->addToStore(*info, *source, repair, checkSigs);
|
||
}
|
||
|
||
|
||
void copyPaths(ref<Store> srcStore, ref<Store> dstStore, const PathSet & storePaths,
|
||
RepairFlag repair, CheckSigsFlag checkSigs, SubstituteFlag substitute)
|
||
{
|
||
PathSet valid = dstStore->queryValidPaths(storePaths, substitute);
|
||
|
||
PathSet missing;
|
||
for (auto & path : storePaths)
|
||
if (!valid.count(path)) missing.insert(path);
|
||
|
||
if (missing.empty()) return;
|
||
|
||
Activity act(*logger, lvlInfo, actCopyPaths, fmt("copying %d paths", missing.size()));
|
||
|
||
std::atomic<size_t> nrDone{0};
|
||
std::atomic<size_t> nrFailed{0};
|
||
std::atomic<uint64_t> bytesExpected{0};
|
||
std::atomic<uint64_t> nrRunning{0};
|
||
|
||
auto showProgress = [&]() {
|
||
act.progress(nrDone, missing.size(), nrRunning, nrFailed);
|
||
};
|
||
|
||
ThreadPool pool;
|
||
|
||
processGraph<Path>(pool,
|
||
PathSet(missing.begin(), missing.end()),
|
||
|
||
[&](const Path & storePath) {
|
||
if (dstStore->isValidPath(storePath)) {
|
||
nrDone++;
|
||
showProgress();
|
||
return PathSet();
|
||
}
|
||
|
||
auto info = srcStore->queryPathInfo(storePath);
|
||
|
||
bytesExpected += info->narSize;
|
||
act.setExpected(actCopyPath, bytesExpected);
|
||
|
||
return info->references;
|
||
},
|
||
|
||
[&](const Path & storePath) {
|
||
checkInterrupt();
|
||
|
||
if (!dstStore->isValidPath(storePath)) {
|
||
MaintainCount<decltype(nrRunning)> mc(nrRunning);
|
||
showProgress();
|
||
try {
|
||
copyStorePath(srcStore, dstStore, storePath, repair, checkSigs);
|
||
} catch (Error &e) {
|
||
nrFailed++;
|
||
if (!settings.keepGoing)
|
||
throw e;
|
||
logger->log(lvlError, format("could not copy %s: %s") % storePath % e.what());
|
||
showProgress();
|
||
return;
|
||
}
|
||
}
|
||
|
||
nrDone++;
|
||
showProgress();
|
||
});
|
||
}
|
||
|
||
|
||
void copyClosure(ref<Store> srcStore, ref<Store> dstStore,
|
||
const PathSet & storePaths, RepairFlag repair, CheckSigsFlag checkSigs,
|
||
SubstituteFlag substitute)
|
||
{
|
||
PathSet closure;
|
||
srcStore->computeFSClosure({storePaths}, closure);
|
||
copyPaths(srcStore, dstStore, closure, repair, checkSigs, substitute);
|
||
}
|
||
|
||
|
||
ValidPathInfo decodeValidPathInfo(std::istream & str, bool hashGiven)
|
||
{
|
||
ValidPathInfo info;
|
||
getline(str, info.path);
|
||
if (str.eof()) { info.path = ""; return info; }
|
||
if (hashGiven) {
|
||
string s;
|
||
getline(str, s);
|
||
info.narHash = Hash(s, htSHA256);
|
||
getline(str, s);
|
||
if (!string2Int(s, info.narSize)) throw Error("number expected");
|
||
}
|
||
getline(str, info.deriver);
|
||
string s; int n;
|
||
getline(str, s);
|
||
if (!string2Int(s, n)) throw Error("number expected");
|
||
while (n--) {
|
||
getline(str, s);
|
||
info.references.insert(s);
|
||
}
|
||
if (!str || str.eof()) throw Error("missing input");
|
||
return info;
|
||
}
|
||
|
||
|
||
string showPaths(const PathSet & paths)
|
||
{
|
||
string s;
|
||
for (auto & i : paths) {
|
||
if (s.size() != 0) s += ", ";
|
||
s += "'" + i + "'";
|
||
}
|
||
return s;
|
||
}
|
||
|
||
|
||
std::string ValidPathInfo::fingerprint() const
|
||
{
|
||
if (narSize == 0 || !narHash)
|
||
throw Error(format("cannot calculate fingerprint of path '%s' because its size/hash is not known")
|
||
% path);
|
||
return
|
||
"1;" + path + ";"
|
||
+ narHash.to_string(Base32) + ";"
|
||
+ std::to_string(narSize) + ";"
|
||
+ concatStringsSep(",", references);
|
||
}
|
||
|
||
|
||
void ValidPathInfo::sign(const SecretKey & secretKey)
|
||
{
|
||
sigs.insert(secretKey.signDetached(fingerprint()));
|
||
}
|
||
|
||
|
||
bool ValidPathInfo::isContentAddressed(const Store & store) const
|
||
{
|
||
auto warn = [&]() {
|
||
printError(format("warning: path '%s' claims to be content-addressed but isn't") % path);
|
||
};
|
||
|
||
if (hasPrefix(ca, "text:")) {
|
||
Hash hash(std::string(ca, 5));
|
||
if (store.makeTextPath(storePathToName(path), hash, references) == path)
|
||
return true;
|
||
else
|
||
warn();
|
||
}
|
||
|
||
else if (hasPrefix(ca, "fixed:")) {
|
||
bool recursive = ca.compare(6, 2, "r:") == 0;
|
||
Hash hash(std::string(ca, recursive ? 8 : 6));
|
||
auto refs = references;
|
||
replaceInSet(refs, path, std::string("self"));
|
||
if (store.makeFixedOutputPath(recursive, hash, storePathToName(path), refs) == path)
|
||
return true;
|
||
else
|
||
warn();
|
||
}
|
||
|
||
return false;
|
||
}
|
||
|
||
|
||
size_t ValidPathInfo::checkSignatures(const Store & store, const PublicKeys & publicKeys) const
|
||
{
|
||
if (isContentAddressed(store)) return maxSigs;
|
||
|
||
size_t good = 0;
|
||
for (auto & sig : sigs)
|
||
if (checkSignature(publicKeys, sig))
|
||
good++;
|
||
return good;
|
||
}
|
||
|
||
|
||
bool ValidPathInfo::checkSignature(const PublicKeys & publicKeys, const std::string & sig) const
|
||
{
|
||
return verifyDetached(fingerprint(), sig, publicKeys);
|
||
}
|
||
|
||
|
||
Strings ValidPathInfo::shortRefs() const
|
||
{
|
||
Strings refs;
|
||
for (auto & r : references)
|
||
refs.push_back(baseNameOf(r));
|
||
return refs;
|
||
}
|
||
|
||
|
||
std::string makeFixedOutputCA(bool recursive, const Hash & hash)
|
||
{
|
||
return "fixed:" + (recursive ? (std::string) "r:" : "") + hash.to_string();
|
||
}
|
||
|
||
|
||
void Store::addToStore(const ValidPathInfo & info, Source & narSource,
|
||
RepairFlag repair, CheckSigsFlag checkSigs,
|
||
std::shared_ptr<FSAccessor> accessor)
|
||
{
|
||
addToStore(info, make_ref<std::string>(narSource.drain()), repair, checkSigs, accessor);
|
||
}
|
||
|
||
void Store::addToStore(const ValidPathInfo & info, const ref<std::string> & nar,
|
||
RepairFlag repair, CheckSigsFlag checkSigs,
|
||
std::shared_ptr<FSAccessor> accessor)
|
||
{
|
||
StringSource source(*nar);
|
||
addToStore(info, source, repair, checkSigs, accessor);
|
||
}
|
||
|
||
}
|
||
|
||
|
||
#include "local-store.hh"
|
||
#include "remote-store.hh"
|
||
|
||
|
||
namespace nix {
|
||
|
||
|
||
RegisterStoreImplementation::Implementations * RegisterStoreImplementation::implementations = 0;
|
||
|
||
/* Split URI into protocol+hierarchy part and its parameter set. */
|
||
std::pair<std::string, Store::Params> splitUriAndParams(const std::string & uri_)
|
||
{
|
||
auto uri(uri_);
|
||
Store::Params params;
|
||
auto q = uri.find('?');
|
||
if (q != std::string::npos) {
|
||
for (auto s : tokenizeString<Strings>(uri.substr(q + 1), "&")) {
|
||
auto e = s.find('=');
|
||
if (e != std::string::npos) {
|
||
auto value = s.substr(e + 1);
|
||
std::string decoded;
|
||
for (size_t i = 0; i < value.size(); ) {
|
||
if (value[i] == '%') {
|
||
if (i + 2 >= value.size())
|
||
throw Error("invalid URI parameter '%s'", value);
|
||
try {
|
||
decoded += std::stoul(std::string(value, i + 1, 2), 0, 16);
|
||
i += 3;
|
||
} catch (...) {
|
||
throw Error("invalid URI parameter '%s'", value);
|
||
}
|
||
} else
|
||
decoded += value[i++];
|
||
}
|
||
params[s.substr(0, e)] = decoded;
|
||
}
|
||
}
|
||
uri = uri_.substr(0, q);
|
||
}
|
||
return {uri, params};
|
||
}
|
||
|
||
ref<Store> openStore(const std::string & uri_,
|
||
const Store::Params & extraParams)
|
||
{
|
||
auto [uri, uriParams] = splitUriAndParams(uri_);
|
||
auto params = extraParams;
|
||
params.insert(uriParams.begin(), uriParams.end());
|
||
|
||
for (auto fun : *RegisterStoreImplementation::implementations) {
|
||
auto store = fun(uri, params);
|
||
if (store) {
|
||
store->warnUnknownSettings();
|
||
return ref<Store>(store);
|
||
}
|
||
}
|
||
|
||
throw Error("don't know how to open Nix store '%s'", uri);
|
||
}
|
||
|
||
|
||
StoreType getStoreType(const std::string & uri, const std::string & stateDir)
|
||
{
|
||
if (uri == "daemon") {
|
||
return tDaemon;
|
||
} else if (uri == "local" || hasPrefix(uri, "/")) {
|
||
return tLocal;
|
||
} else if (uri == "" || uri == "auto") {
|
||
if (access(stateDir.c_str(), R_OK | W_OK) == 0)
|
||
return tLocal;
|
||
else if (pathExists(settings.nixDaemonSocketFile))
|
||
return tDaemon;
|
||
else
|
||
return tLocal;
|
||
} else {
|
||
return tOther;
|
||
}
|
||
}
|
||
|
||
|
||
static RegisterStoreImplementation regStore([](
|
||
const std::string & uri, const Store::Params & params)
|
||
-> std::shared_ptr<Store>
|
||
{
|
||
switch (getStoreType(uri, get(params, "state", settings.nixStateDir))) {
|
||
case tDaemon:
|
||
return std::shared_ptr<Store>(std::make_shared<UDSRemoteStore>(params));
|
||
case tLocal: {
|
||
Store::Params params2 = params;
|
||
if (hasPrefix(uri, "/"))
|
||
params2["root"] = uri;
|
||
return std::shared_ptr<Store>(std::make_shared<LocalStore>(params2));
|
||
}
|
||
default:
|
||
return nullptr;
|
||
}
|
||
});
|
||
|
||
|
||
std::list<ref<Store>> getDefaultSubstituters()
|
||
{
|
||
static auto stores([]() {
|
||
std::list<ref<Store>> stores;
|
||
|
||
StringSet done;
|
||
|
||
auto addStore = [&](const std::string & uri) {
|
||
if (!done.insert(uri).second) return;
|
||
try {
|
||
stores.push_back(openStore(uri));
|
||
} catch (Error & e) {
|
||
printError("warning: %s", e.what());
|
||
}
|
||
};
|
||
|
||
for (auto uri : settings.substituters.get())
|
||
addStore(uri);
|
||
|
||
for (auto uri : settings.extraSubstituters.get())
|
||
addStore(uri);
|
||
|
||
stores.sort([](ref<Store> & a, ref<Store> & b) {
|
||
return a->getPriority() < b->getPriority();
|
||
});
|
||
|
||
return stores;
|
||
} ());
|
||
|
||
return stores;
|
||
}
|
||
|
||
|
||
}
|