forked from lix-project/lix
a3e6415ba8
from a source directory. All files for which a predicate function
returns true are copied to the store. Typical example is to leave
out the .svn directory:
stdenv.mkDerivation {
...
src = builtins.filterSource
(path: baseNameOf (toString path) != ".svn")
./source-dir;
# as opposed to
# src = ./source-dir;
}
This is important because the .svn directory influences the hash in
a rather unpredictable and variable way.
148 lines
3.4 KiB
C++
148 lines
3.4 KiB
C++
#include "store-api.hh"
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#include "globals.hh"
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#include "util.hh"
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namespace nix {
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bool StoreAPI::hasSubstitutes(const Path & path)
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{
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return !querySubstitutes(path).empty();
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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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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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{
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Hash hash = hashString(htSHA256, s);
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return makeStorePath("text", hash, suffix);
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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(bool reserveSpace)
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{
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if (getEnv("NIX_REMOTE") == "")
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return boost::shared_ptr<StoreAPI>(new LocalStore(reserveSpace));
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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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