130 lines
3.6 KiB
C++
130 lines
3.6 KiB
C++
#include "input-accessor.hh"
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#include "store-api.hh"
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#include "cache.hh"
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namespace nix {
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StorePath InputAccessor::fetchToStore(
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Store & store,
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const CanonPath & path,
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std::string_view name,
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ContentAddressMethod method,
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PathFilter * filter,
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RepairFlag repair)
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{
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// FIXME: add an optimisation for the case where the accessor is
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// an FSInputAccessor pointing to a store path.
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std::optional<fetchers::Attrs> cacheKey;
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if (!filter && fingerprint) {
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cacheKey = fetchers::Attrs{
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{"_what", "fetchToStore"},
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{"store", store.storeDir},
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{"name", std::string(name)},
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{"fingerprint", *fingerprint},
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{
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"method",
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std::visit(overloaded {
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[](const TextIngestionMethod &) {
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return "text";
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},
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[](const FileIngestionMethod & fim) {
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switch (fim) {
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case FileIngestionMethod::Flat: return "flat";
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case FileIngestionMethod::Recursive: return "nar";
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default: assert(false);
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}
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},
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}, method.raw),
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},
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{"path", path.abs()}
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};
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if (auto res = fetchers::getCache()->lookup(store, *cacheKey)) {
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debug("store path cache hit for '%s'", showPath(path));
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return res->second;
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}
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} else
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debug("source path '%s' is uncacheable", showPath(path));
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Activity act(*logger, lvlChatty, actUnknown, fmt("copying '%s' to the store", showPath(path)));
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auto filter2 = filter ? *filter : defaultPathFilter;
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auto storePath =
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settings.readOnlyMode
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? store.computeStorePath(
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name, *this, path, method, HashAlgorithm::SHA256, {}, filter2).first
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: store.addToStore(
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name, *this, path, method, HashAlgorithm::SHA256, {}, filter2, repair);
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if (cacheKey)
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fetchers::getCache()->add(store, *cacheKey, {}, storePath, true);
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return storePath;
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}
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std::ostream & operator << (std::ostream & str, const SourcePath & path)
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{
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str << path.to_string();
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return str;
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}
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StorePath SourcePath::fetchToStore(
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Store & store,
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std::string_view name,
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ContentAddressMethod method,
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PathFilter * filter,
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RepairFlag repair) const
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{
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return accessor->fetchToStore(store, path, name, method, filter, repair);
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}
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std::string_view SourcePath::baseName() const
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{
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return path.baseName().value_or("source");
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}
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SourcePath SourcePath::parent() const
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{
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auto p = path.parent();
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assert(p);
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return {accessor, std::move(*p)};
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}
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SourcePath SourcePath::resolveSymlinks() const
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{
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auto res = SourcePath(accessor);
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int linksAllowed = 1024;
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std::list<std::string> todo;
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for (auto & c : path)
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todo.push_back(std::string(c));
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while (!todo.empty()) {
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auto c = *todo.begin();
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todo.pop_front();
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if (c == "" || c == ".")
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;
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else if (c == "..")
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res.path.pop();
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else {
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res.path.push(c);
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if (auto st = res.maybeLstat(); st && st->type == InputAccessor::tSymlink) {
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if (!linksAllowed--)
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throw Error("infinite symlink recursion in path '%s'", path);
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auto target = res.readLink();
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res.path.pop();
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if (hasPrefix(target, "/"))
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res.path = CanonPath::root;
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todo.splice(todo.begin(), tokenizeString<std::list<std::string>>(target, "/"));
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}
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}
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}
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return res;
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}
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}
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