#pragma once

#include "sqlite.hh"
#include <string>
#include <unordered_set>

#include "pathlocks.hh"
#include "store-api.hh"
#include "util.hh"


namespace nix {


/* Nix store and database schema version.  Version 1 (or 0) was Nix <=
   0.7.  Version 2 was Nix 0.8 and 0.9.  Version 3 is Nix 0.10.
   Version 4 is Nix 0.11.  Version 5 is Nix 0.12-0.16.  Version 6 is
   Nix 1.0.  Version 7 is Nix 1.3.  Guix has always used version 7.  */
const int nixSchemaVersion = 7;


extern string drvsLogDir;


struct Derivation;


struct OptimiseStats
{
    unsigned long filesLinked;
    unsigned long long bytesFreed;
    unsigned long long blocksFreed;
    OptimiseStats()
    {
        filesLinked = 0;
        bytesFreed = blocksFreed = 0;
    }
};


struct RunningSubstituter
{
    Pid pid;
    AutoCloseFD to, from, error;
    FdSource fromBuf;
    bool disabled;
    RunningSubstituter() : disabled(false) { };
};


class LocalStore : public StoreAPI
{
private:
    /* The currently running substituter or empty.  */
    std::unique_ptr<RunningSubstituter> runningSubstituter;

    Path linksDir;

public:

    /* Initialise the local store, u</td></tr></table>
<table class='tabs'><tr><td>
<a href='/guix/about/'>about</a><a href='/guix/'>summary</a><a href='/guix/refs/?id=ad5a8c0fc1773517b3bd27a07f9c0ab4fe47249b'>refs</a><a href='/guix/log/etc/release-manifest.scm'>log</a><a href='/guix/tree/etc/release-manifest.scm?id=ad5a8c0fc1773517b3bd27a07f9c0ab4fe47249b'>tree</a><a href='/guix/commit/etc/release-manifest.scm?id=ad5a8c0fc1773517b3bd27a07f9c0ab4fe47249b'>commit</a><a class='active' href='/guix/diff/etc/release-manifest.scm?id=ad5a8c0fc1773517b3bd27a07f9c0ab4fe47249b&amp;id2=c4165dc0d1927a12b262441002641d68d1cffd6f'>diff</a></td><td class='form'><form class='right' method='get' action='/guix/log/etc/release-manifest.scm'>
<input type='hidden' name='id' value='ad5a8c0fc1773517b3bd27a07f9c0ab4fe47249b'/><input type='hidden' name='id2' value='c4165dc0d1927a12b262441002641d68d1cffd6f'/><select name='qt'>
<option value='grep'>log msg</option>
<option value='author'>author</option>
<option value='committer'>committer</option>
<option value='range'>range</option>
</select>
<input class='txt' type='search' size='10' name='q' value=''/>
<input type='submit' value='search'/>
</form>
</td></tr></table>
<div class='path'>path: <a href='/guix/diff/?id=ad5a8c0fc1773517b3bd27a07f9c0ab4fe47249b&amp;id2=c4165dc0d1927a12b262441002641d68d1cffd6f'>root</a>/<a href='/guix/diff/etc?id=ad5a8c0fc1773517b3bd27a07f9c0ab4fe47249b&amp;id2=c4165dc0d1927a12b262441002641d68d1cffd6f'>etc</a>/<a href='/guix/diff/etc/release-manifest.scm?id=ad5a8c0fc1773517b3bd27a07f9c0ab4fe47249b&amp;id2=c4165dc0d1927a12b262441002641d68d1cffd6f'>release-manifest.scm</a></div><div class='content'><div class='cgit-panel'><b>diff options</b><form method='get'><input type='hidden' name='id' value='ad5a8c0fc1773517b3bd27a07f9c0ab4fe47249b'/><input type='hidden' name='id2' value='c4165dc0d1927a12b262441002641d68d1cffd6f'/><table><tr><td colspan='2'/></tr><tr><td class='label'>context:</td><td class='ctrl'><select name='context' onchange='this.form.submit();'><option value='1'>1</option><option value='2'>2</option><option value='3' selected='selected'>3</option><option value='4'>4</option><option value='5'>5</option><option value='6'>6</option><option value='7'>7</option><option value='8'>8</option><option value='9'>9</option><option value='10'>10</option><option value='15'>15</option><option value='20'>20</option><option value='25'>25</option><option value='30'>30</option><option value='35'>35</option><option value='40'>40</option></select></td></tr><tr><td class='label'>space:</td><td class='ctrl'><select name='ignorews' onchange='this.form.submit();'><option value='0' selected='selected'>include</option><option value='1'>ignore</option></select></td></tr><tr><td class='label'>mode:</td><td class='ctrl'><select name='dt' onchange='this.form.submit();'><option value='0' selected='selected'>unified</option><option value='1'>ssdiff</option><option value='2'>stat only</option></select></td></tr><tr><td/><td class='ctrl'><noscript><input type='submit' value='reload'/></noscript></td></tr></table></form></div><div class='diffstat-header'><a href='/guix/diff/?id=ad5a8c0fc1773517b3bd27a07f9c0ab4fe47249b&amp;id2=c4165dc0d1927a12b262441002641d68d1cffd6f'>Diffstat</a> (limited to 'etc/release-manifest.scm')</div><table summary='diffstat' class='diffstat'></table><div class='diffstat-summary'>0 files changed, 0 insertions, 0 deletions</div><table summary='diff' class='diff'><tr><td></td></tr></table></div> <!-- class=content -->
                         <div class=footer>generated by
                             <a href="https://git.zx2c4.com/cgit/about/">
                                 cgit
                             </a>
                         </div>
                        </div> <!-- id=cgit -->
</body>
</html>
onst Path & path);

    void markContentsGood(const Path & path);

    void setSubstituterEnv();

    void createUser(const std::string & userName, uid_t userId);

private:

    Path schemaPath;

    /* Lock file used for upgrading. */
    AutoCloseFD globalLock;

    /* The SQLite database object. */
    SQLite db;

    /* Some precompiled SQLite statements. */
    SQLiteStmt stmtRegisterValidPath;
    SQLiteStmt stmtUpdatePathInfo;
    SQLiteStmt stmtAddReference;
    SQLiteStmt stmtQueryPathInfo;
    SQLiteStmt stmtQueryReferences;
    SQLiteStmt stmtQueryReferrers;
    SQLiteStmt stmtInvalidatePath;
    SQLiteStmt stmtRegisterFailedPath;
    SQLiteStmt stmtHasPathFailed;
    SQLiteStmt stmtQueryFailedPaths;
    SQLiteStmt stmtClearFailedPath;
    SQLiteStmt stmtAddDerivationOutput;
    SQLiteStmt stmtQueryValidDerivers;
    SQLiteStmt stmtQueryDerivationOutputs;
    SQLiteStmt stmtQueryPathFromHashPart;
    SQLiteStmt stmtQueryValidPaths;

    /* Cache for pathContentsGood(). */
    std::map<Path, bool> pathContentsGoodCache;

    bool didSetSubstituterEnv;

    /* The file to which we write our temporary roots. */
    Path fnTempRoots;
    AutoCloseFD fdTempRoots;

    int getSchema();

    void openDB(bool create);

    void makeStoreWritable();

    uint64_t queryValidPathId(const Path & path);

    uint64_t addValidPath(const ValidPathInfo & info, bool checkOutputs = true);

    void addReference(uint64_t referrer, uint64_t reference);

    void appendReferrer(const Path & from, const Path & to, bool lock);

    void rewriteReferrers(const Path & path, bool purge, PathSet referrers);

    void invalidatePath(const Path & path);

    /* Delete a path from the Nix store. */
    void invalidatePathChecked(const Path & path);

    void verifyPath(const Path & path, const PathSet & store,
        PathSet & done, PathSet & validPaths, bool repair, bool & errors);

    void updatePathInfo(const ValidPathInfo & info);

    struct GCState;

    void deleteGarbage(GCState & state, const Path & path);

    void tryToDelete(GCState & state, const Path & path);

    bool canReachRoot(GCState & state, PathSet & visited, const Path & path);

    void deletePathRecursive(GCState & state, const Path & path);

    bool isActiveTempFile(const GCState & state,
        const Path & path, const string & suffix);

    int openGCLock(LockType lockType);

    void removeUnusedLinks(const GCState & state);

    void startSubstituter(RunningSubstituter & runningSubstituter);

    string getLineFromSubstituter(RunningSubstituter & run);

    template<class T> T getIntLineFromSubstituter(RunningSubstituter & run);

    Path createTempDirInStore();

    Path importPath(bool requireSignature, Source & source);

    void checkDerivationOutputs(const Path & drvPath, const Derivation & drv);

    typedef std::unordered_set<ino_t> InodeHash;

    InodeHash loadInodeHash();
    Strings readDirectoryIgnoringInodes(const Path & path, const InodeHash & inodeHash);
    void optimisePath_(OptimiseStats & stats, const Path & path, InodeHash & inodeHash);

    // Internal versions that are not wrapped in retry_sqlite.
    bool isValidPath_(const Path & path);
    void queryReferrers_(const Path & path, PathSet & referrers);
};


typedef std::pair<dev_t, ino_t> Inode;
typedef set<Inode> InodesSeen;


/* "Fix", or canonicalise, the meta-data of the files in a store path
   after it has been built.  In particular:
   - the last modification date on each file is set to 1 (i.e.,
     00:00:01 1/1/1970 UTC)
   - the permissions are set of 444 or 555 (i.e., read-only with or
     without execute permission; setuid bits etc. are cleared)
   - the owner and group are set to the Nix user and group, if we're
     running as root. */
void canonicalisePathMetaData(const Path & path, uid_t fromUid, InodesSeen & inodesSeen);
void canonicalisePathMetaData(const Path & path, uid_t fromUid);

void canonicaliseTimestampAndPermissions(const Path & path);

MakeError(PathInUse, Error);

}