/// <summary>
/// When this returns, we will hold the output cache mutex.
/// </summary>
/// <param name="commonkey"></param>
/// <param name="manifest"></param>
/// <returns></returns>
public override bool CheckCache(ICompiler comp, IEnumerable <string> args, DataHash commonkey, out CacheManifest manifest)
{
manifest = null;
Lock(CacheLockType.Read);
manifest = GetCachedManifestLocked(commonkey);
if (manifest != null)
{
#region build missed before
if (manifest.Disable)
{
Logging.Emit("disabled by manifest");
return(false);
}
#region check includes
foreach (var f in manifest.PotentialNewIncludes)
{
if (!FileUtils.FileMissing(f))
{
Logging.Emit("detected added include file {0}", f);
Logging.Miss(commonkey.SessionHash, DataHashResult.FileAdded, Directory.GetCurrentDirectory(), comp.SingleSourceFile, f);
return(false);
}
}
var files = new List <string>();
files.AddRange(manifest.IncludeFiles.Keys);
var hashes = GetHashes(files, comp.WorkingDirectory);
foreach (var h in hashes)
{
if (h.Value.Result == DataHashResult.Ok)
{
string mhash;
if (manifest.IncludeFiles.TryGetValue(h.Key, out mhash))
{
if (mhash != h.Value.Hash)
{
Logging.Emit("include file hash changed {0}", h.Key);
Logging.Miss(commonkey.SessionHash, DataHashResult.FileChanged, Directory.GetCurrentDirectory(), comp.SingleSourceFile, h.Key);
return(false);
}
}
else
{
Logging.Emit("include file added {0}", h.Key);
Logging.Miss(commonkey.SessionHash, DataHashResult.FileAdded, Directory.GetCurrentDirectory(), comp.SingleSourceFile, h.Key);
return(false);
}
}
else
{
Logging.Emit("include file hash error {0} {1}", h.Key, h.Value.Result);
Logging.Miss(commonkey.SessionHash, h.Value.Result, Directory.GetCurrentDirectory(), comp.SingleSourceFile, h.Key);
return(false);
}
}
#endregion
#region check pdb
if (comp.AttemptPdb)
{
if (comp.PdbExistsAlready)
{
var pdbhash = hasher.DigestBinaryFile(comp.PdbFile);
if (pdbhash.Hash != manifest.EarlierPdbHash)
{
outputCache.Remove(commonkey.Hash);
Logging.Miss(commonkey.Hash, DataHashResult.FileChanged, commonkey.Hash, comp.PdbFile, "");
return(false);
}
}
}
#endregion
#region check cached data exists
foreach (var f in new string[] { F_Manifest, F_Object })
{
if (!outputCache.ContainsEntry(commonkey.SessionHash, f))
{
outputCache.Remove(commonkey.SessionHash);
Logging.Miss(commonkey.SessionHash, DataHashResult.CacheCorrupt, commonkey.SessionHash, comp.SingleSourceFile, "");
return(false);
}
}
#endregion
if (Settings.MissLogEnabled)
{
Logging.Emit("hit hc={0},dir={1},src={2}", commonkey.Hash, comp.WorkingDirectory, comp.SingleSourceFile);
}
return(true); // cache hit, all includes match and no new files added
#endregion
}
Logging.Miss(commonkey.Hash, DataHashResult.NoPreviousBuild, comp.WorkingDirectory, comp.SingleSourceFile, "");
return(false);
}
