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// slang-emit-dependency-file.cpp
#include "slang-emit-dependency-file.h"
#include "slang-compiler.h"
namespace Slang
{
static void _writeString(Stream& stream, const char* string)
{
stream.write(string, strlen(string));
}
static void _escapeDependencyString(const char* string, StringBuilder& outBuilder)
{
// make has unusual escaping rules, but we only care about characters that are acceptable in a
// path
for (const char* p = string; *p; ++p)
{
char c = *p;
switch (c)
{
case ' ':
case ':':
case '#':
case '[':
case ']':
case '\\':
outBuilder.appendChar('\\');
break;
case '$':
outBuilder.appendChar('$');
break;
}
outBuilder.appendChar(c);
}
}
// Writes a line to the file stream, formatted like this:
// <output-file>: <dependency-file> <dependency-file...>
static void _writeDependencyStatement(
Stream& stream,
EndToEndCompileRequest* compileRequest,
const String& outputPath)
{
if (outputPath.getLength() == 0)
return;
StringBuilder builder;
_escapeDependencyString(outputPath.begin(), builder);
_writeString(stream, builder.begin());
_writeString(stream, ": ");
int dependencyCount = compileRequest->getDependencyFileCount();
for (int dependencyIndex = 0; dependencyIndex < dependencyCount; ++dependencyIndex)
{
builder.clear();
_escapeDependencyString(compileRequest->getDependencyFilePath(dependencyIndex), builder);
_writeString(stream, builder.begin());
_writeString(stream, (dependencyIndex + 1 < dependencyCount) ? " " : "\n");
}
}
// Writes a file with dependency info, with one line in the output file per compile product.
SlangResult writeDependencyFile(EndToEndCompileRequest* compileRequest)
{
if (compileRequest->m_dependencyOutputPath.getLength() == 0)
return SLANG_OK;
FileStream stream;
SLANG_RETURN_ON_FAIL(stream.init(
compileRequest->m_dependencyOutputPath,
FileMode::Create,
FileAccess::Write,
FileShare::ReadWrite));
auto linkage = compileRequest->getLinkage();
auto program = compileRequest->getSpecializedGlobalAndEntryPointsComponentType();
// Iterate over all the targets and their outputs
for (const auto& targetReq : linkage->targets)
{
if (compileRequest->getTargetOptionSet(targetReq).getBoolOption(
CompilerOptionName::GenerateWholeProgram))
{
RefPtr<EndToEndCompileRequest::TargetInfo> targetInfo;
if (compileRequest->m_targetInfos.tryGetValue(targetReq, targetInfo))
{
_writeDependencyStatement(
stream,
compileRequest,
targetInfo->wholeTargetOutputPath);
}
}
else
{
Index entryPointCount = program->getEntryPointCount();
for (Index entryPointIndex = 0; entryPointIndex < entryPointCount; ++entryPointIndex)
{
RefPtr<EndToEndCompileRequest::TargetInfo> targetInfo;
if (compileRequest->m_targetInfos.tryGetValue(targetReq, targetInfo))
{
String outputPath;
if (targetInfo->entryPointOutputPaths.tryGetValue(entryPointIndex, outputPath))
{
_writeDependencyStatement(stream, compileRequest, outputPath);
}
}
}
}
}
// When the output is a binary module, linkage->targets can be empty. So
// we need to do their dependencies separately.
if (compileRequest->m_containerFormat == ContainerFormat::SlangModule)
{
_writeDependencyStatement(stream, compileRequest, compileRequest->m_containerOutputPath);
}
return SLANG_OK;
}
} // namespace Slang
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