#pragma once

#include "types.hh"


namespace nix {


/* Open (possibly create) a lock file and return the file descriptor.
   -1 is returned if create is false and the lock could not be opened
   because it doesn't exist.  Any other error throws an exception. */
int openLockFile(const Path & path, bool create);

/* Delete an open lock file. */
void deleteLockFile(const Path & path, int fd);

enum LockType { ltRead, ltWrite, ltNone };

bool lockFile(int fd, LockType lockType, bool wait);


class PathLocks 
{
private:
    typedef std::pair<int, Path> FDPair;
    list<FDPair> fds;
    bool deletePaths;

public:
    PathLocks();
    PathLocks(const PathSet & paths,
        const string & waitMsg = "");
    bool lockPaths(const PathSet & _paths,
        const string & waitMsg = "",
        bool wait = true);
    ~PathLocks();
    void unlock();
    void setDeletion(bool deletePaths);
};


bool pathIsLockedByMe(const Path & path);


}
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<div class='path'>path: <a href='/guix/log/?id=87ce159bc1db935df0f9839c58e505c4a210688c'>root</a>/<a href='/guix/log/tests?id=87ce159bc1db935df0f9839c58e505c4a210688c'>tests</a>/<a href='/guix/log/tests/swh.scm?id=87ce159bc1db935df0f9839c58e505c4a210688c'>swh.scm</a></div><div class='content'><table class='list nowrap'><tr class='nohover'><th class='left'>Age</th><th class='left'>Commit message (<a href='/guix/log/tests/swh.scm?id=87ce159bc1db935df0f9839c58e505c4a210688c&amp;showmsg=1'>Expand</a>)</th><th class='left'>Author</th></tr>
<tr><td><span title='2024-03-09 18:55:49 +0100'>2024-03-09</span></td><td><a href='/guix/commit/tests/swh.scm?id=ddd455c0dd5a527f3c7e94b8b9056155facb37e6'>swh: ‘lookup-origin-revision’ handles branches pointing to directories.</a><span class='msg-avail'>...<span class='msg-tooltip'>Fixes &lt;https://issues.guix.gnu.org/69070&gt;.

* guix/swh.scm (branch-target): Add clause for 'directory and 'alias.
(lookup-origin-revision): Iterate over all the visits of ORIGIN instead
of just the first one.  Handle the case where ‘branch-target’ returns
something other than a release or revision.
* tests/swh.scm ("lookup-origin-revision"): New test.

Change-Id: I7f636739a719908763bca1d3e7376341dd62e816
</span></span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2024-02-12 12:03:53 +0100'>2024-02-12</span></td><td><a href='/guix/commit/tests/swh.scm?id=be773bd192466fa7e26938a157c0885adf46139e'>swh: Add bindings for the “ExtID” API.</a><span class='msg-avail'>...<span class='msg-tooltip'>This interface was deployed at archive.softwareheritage.org a few days
ago.  Our main use case will be looking up directories by “nar-sha256”
hashes.

* guix/swh.scm (&lt;external-id&gt;): New JSON-mapped record type.
(lookup-external-id, lookup-directory-by-nar-hash): New procedures.
* tests/swh.scm (%external-id): New variable.
("lookup-directory-by-nar-hash"): New test.

Change-Id: Ib671c7798aeb6f8132ac78f2b06b9285da8e7bd5
</span></span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2021-01-21 11:22:08 +0100'>2021-01-21</span></td><td><a href='/guix/commit/tests/swh.scm?id=5225732b9b54ffa92b9d199246b87dae666a3f77'>swh: Test proper handling of null visit snapshot URL.</a><span class='msg-avail'>...<span class='msg-tooltip'>* tests/swh.scm (%origin): Change "visits_url" to "origin_visits_url".
(%visits): New variable.
("origin-visit, no snapshots"): New test.
</span></span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2020-12-21 17:47:35 +0100'>2020-12-21</span></td><td><a href='/guix/commit/tests/swh.scm?id=9608f4003dedd8dfe99327c15668ca1a43ebd93b'>tests: Fix malformed JSON.</a><span class='msg-avail'>...<span class='msg-tooltip'>Guile-JSON 4.3.2 would parse in spite of these typos, but 4.4.1 is
stricter.

* tests/swh.scm (%directory-entries): Add missing comma.
* tests/cve-sample.json: Likewise.
</span></span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2020-02-27 23:29:30 +0100'>2020-02-27</span></td><td><a href='/guix/commit/tests/swh.scm?id=749b9582061f7d929be83a194040b63b41afec81'>swh: Adjust 'origin' test.</a><span class='msg-avail'>...<span class='msg-tooltip'>This is a followup to 3d2f29382de2d0ee852745cc002dfe2b5d22e1c2.

* tests/swh.scm (%origin): Remove "id".
("lookup-origin"): Remove use of 'origin-id'.
</span></span></td><td>Ludovic Courtès</td></tr>