private void SetEnvironmentVariables(ProcessBuilder processBuilder, NinjaNode node)
{
foreach (KeyValuePair <string, string> kvp in m_environmentVariables.Value)
{
if (kvp.Value != null)
{
var envPipData = new PipDataBuilder(m_context.StringTable);
if (SpecialEnvironmentVariables.PassThroughPrefixes.All(prefix => !kvp.Key.StartsWith(prefix)))
{
envPipData.Add(kvp.Value);
processBuilder.SetEnvironmentVariable(StringId.Create(m_context.StringTable, kvp.Key), envPipData.ToPipData(string.Empty, PipDataFragmentEscaping.NoEscaping));
}
}
}
foreach (var kvp in m_passThroughEnvironmentVariables.Value)
{
processBuilder.SetPassthroughEnvironmentVariable(StringId.Create(m_context.StringTable, kvp.Key));
}
foreach (var envVar in SpecialEnvironmentVariables.CloudBuildEnvironment)
{
processBuilder.SetPassthroughEnvironmentVariable(StringId.Create(m_context.StringTable, envVar));
}
// GlobalUnsafePassthroughEnvironmentVariables
processBuilder.SetGlobalPassthroughEnvironmentVariable(m_frontEndHost.Configuration.FrontEnd.GlobalUnsafePassthroughEnvironmentVariables, m_context.StringTable);
// We will specify a different MSPDBSRV endpoint for every pip.
// This means every pip that needs to communicate to MSPDBSRV will
// spawn a different child process.
// This is because if two pips use the same endpoint at the same time
// then second one will fail after the first one finishes, because the
// first one was the one that spawned MSPDBSRV.EXE as a child
// (which gets killed).
//
// IMPORTANT: This will cause the build to fail if two pips target the same PDB file.
// Both LINK.EXE and CL.EXE can use MSPDBSRV.EXE:
// - If all linkers specify a different /pdb argument (or don't specify this argument and
// are linking programs with different names
// [https://docs.microsoft.com/en-us/cpp/build/reference/debug-generate-debug-info])
// then this won't happen
//
// - We're forcing the compiler to not output to PDBs (/Z7)
//
// so this should work in the normal cases.
var mspdbsrvPipDataBuilder = new PipDataBuilder(m_context.StringTable);
mspdbsrvPipDataBuilder.Add(PipConstructionUtilities.ComputeSha256(node.Command)); // Unique value for each pip
processBuilder.SetEnvironmentVariable(
StringId.Create(m_context.StringTable, SpecialEnvironmentVariables.MsPdvSrvEndpoint),
mspdbsrvPipDataBuilder.ToPipData(string.Empty, PipDataFragmentEscaping.NoEscaping));
}
/// <summary>
/// Computes a sha256 based on the project properties
/// </summary>
private string ComputeSha256(ProjectWithPredictions projectWithPredictions)
{
using (var builderWrapper = Pools.GetStringBuilder())
{
// full path, global properties and targets to execute should uniquely identify the project within the build graph
StringBuilder builder = builderWrapper.Instance;
builder.Append(projectWithPredictions.FullPath.ToString(PathTable));
builder.Append("|");
builder.Append(projectWithPredictions.PredictedTargetsToExecute.IsDefaultTargetsAppended);
builder.Append(string.Join("|", projectWithPredictions.PredictedTargetsToExecute.Targets));
builder.Append("|");
builder.Append(string.Join("|", projectWithPredictions.GlobalProperties.Select(kvp => kvp.Key + "|" + kvp.Value)));
return(PipConstructionUtilities.ComputeSha256(builder.ToString()));
}
}