257 lines
6 KiB
C++
257 lines
6 KiB
C++
#include "store-api.hh"
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#include "globals.hh"
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#include "util.hh"
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#include <limits.h>
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/* Needed for some ancient environments. */
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#ifndef ULLONG_MAX
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#define ULLONG_MAX 18446744073709551615
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#endif
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namespace nix {
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GCOptions::GCOptions()
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{
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action = gcDeleteDead;
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ignoreLiveness = false;
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maxFreed = ULLONG_MAX;
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maxLinks = 0;
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useAtime = false;
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maxAtime = (time_t) -1;
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}
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bool isInStore(const Path & path)
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{
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return path[0] == '/'
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&& string(path, 0, nixStore.size()) == nixStore
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&& path.size() >= nixStore.size() + 2
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&& path[nixStore.size()] == '/';
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}
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bool isStorePath(const Path & path)
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{
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return isInStore(path)
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&& path.find('/', nixStore.size() + 1) == Path::npos;
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}
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void assertStorePath(const Path & path)
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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 toStorePath(const Path & 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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Path::size_type slash = path.find('/', nixStore.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 followLinksToStore(const Path & _path)
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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 followLinksToStorePath(const Path & path)
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{
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return toStorePath(followLinksToStore(path));
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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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/* Disallow names starting with a dot for possible security
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reasons (e.g., "." and ".."). */
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if (string(name, 0, 1) == ".")
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throw Error(format("illegal name: `%1%'") % name);
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for (string::const_iterator i = name.begin(); i != name.end(); ++i)
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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(format("invalid character `%1%' in name `%2%'")
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% *i % name);
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}
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}
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Path makeStorePath(const string & type,
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const Hash & hash, const string & suffix)
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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 + ":sha256:" + printHash(hash) + ":"
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+ nixStore + ":" + suffix;
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checkStoreName(suffix);
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return nixStore + "/"
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+ printHash32(compressHash(hashString(htSHA256, s), 20))
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+ "-" + suffix;
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}
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Path makeFixedOutputPath(bool recursive,
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string hashAlgo, Hash hash, string name)
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{
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/* !!! copy/paste from primops.cc */
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Hash h = hashString(htSHA256, "fixed:out:"
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+ (recursive ? (string) "r:" : "") + hashAlgo + ":"
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+ printHash(hash) + ":"
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+ "");
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return makeStorePath("output:out", h, name);
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}
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std::pair<Path, Hash> computeStorePathForPath(const Path & srcPath,
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bool fixed, bool recursive, string hashAlgo, PathFilter & filter)
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{
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Hash h = hashPath(htSHA256, srcPath, filter);
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string baseName = baseNameOf(srcPath);
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Path dstPath;
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if (fixed) {
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HashType ht(parseHashType(hashAlgo));
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Hash h2 = recursive ? hashPath(ht, srcPath, filter) : hashFile(ht, srcPath);
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dstPath = makeFixedOutputPath(recursive, hashAlgo, h2, baseName);
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}
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else dstPath = makeStorePath("source", h, baseName);
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return std::pair<Path, Hash>(dstPath, h);
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}
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Path computeStorePathForText(const string & suffix, const string & s,
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const PathSet & references)
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{
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Hash hash = hashString(htSHA256, s);
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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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string type = "text";
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for (PathSet::const_iterator i = references.begin(); i != references.end(); ++i) {
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type += ":";
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type += *i;
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}
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return makeStorePath(type, hash, suffix);
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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 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 (PathSet::iterator i = paths.begin(); i != paths.end(); ++i) {
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s += *i + "\n";
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if (showHash)
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s += printHash(store->queryPathHash(*i)) + "\n";
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Path deriver = showDerivers ? store->queryDeriver(*i) : "";
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s += deriver + "\n";
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PathSet references;
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store->queryReferences(*i, references);
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s += (format("%1%\n") % references.size()).str();
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for (PathSet::iterator j = references.begin();
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j != references.end(); ++j)
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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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ValidPathInfo decodeValidPathInfo(std::istream & str, bool hashGiven)
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{
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ValidPathInfo info;
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getline(str, info.path);
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if (str.eof()) { info.path = ""; return info; }
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if (hashGiven) {
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string s;
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getline(str, s);
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info.hash = parseHash(htSHA256, s);
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}
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getline(str, info.deriver);
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string s; int n;
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getline(str, s);
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if (!string2Int(s, n)) throw Error("number expected");
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while (n--) {
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getline(str, s);
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info.references.insert(s);
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}
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if (!str || str.eof()) throw Error("missing input");
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return info;
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}
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string showPaths(const PathSet & paths)
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{
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string s;
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for (PathSet::const_iterator i = paths.begin();
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i != paths.end(); ++i)
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{
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if (s.size() != 0) s += ", ";
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s += "`" + *i + "'";
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}
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return s;
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}
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}
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#include "local-store.hh"
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#include "serialise.hh"
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#include "remote-store.hh"
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namespace nix {
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boost::shared_ptr<StoreAPI> store;
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boost::shared_ptr<StoreAPI> openStore()
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{
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if (getEnv("NIX_REMOTE") == "")
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return boost::shared_ptr<StoreAPI>(new LocalStore());
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else
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return boost::shared_ptr<StoreAPI>(new RemoteStore());
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}
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}
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