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/* Distributed under the OSI-approved BSD 3-Clause License. See accompanying
file LICENSE.rst or https://cmake.org/licensing for details. */
#pragma once
#include "cmConfigure.h" // IWYU pragma: keep
#include <array>
#include <cstddef> // IWYU pragma: keep
#include <cstdint>
#include <cstdio>
#include <memory>
#include <string>
#include <utility>
#include <vector>
#include <cm3p/uv.h>
class cmUVProcessChain;
class cmUVProcessChainBuilder
{
public:
enum Stream
{
Stream_INPUT = 0,
Stream_OUTPUT = 1,
Stream_ERROR = 2,
};
cmUVProcessChainBuilder();
cmUVProcessChainBuilder& AddCommand(std::vector<std::string> arguments);
cmUVProcessChainBuilder& SetBuiltinLoop();
cmUVProcessChainBuilder& SetExternalLoop(uv_loop_t& loop);
cmUVProcessChainBuilder& SetNoStream(Stream stdio);
cmUVProcessChainBuilder& SetBuiltinStream(Stream stdio);
cmUVProcessChainBuilder& SetMergedBuiltinStreams();
cmUVProcessChainBuilder& SetExternalStream(Stream stdio, int fd);
cmUVProcessChainBuilder& SetExternalStream(Stream stdio, FILE* stream);
cmUVProcessChainBuilder& SetWorkingDirectory(std::string dir);
cmUVProcessChainBuilder& SetDetached();
uv_loop_t* GetLoop() const;
cmUVProcessChain Start() const;
private:
enum StdioType
{
None,
Builtin,
External,
};
friend class cmUVProcessChain;
struct StdioConfiguration
{
StdioType Type = None;
int FileDescriptor = -1;
};
struct ProcessConfiguration
{
std::vector<std::string> Arguments;
};
std::array<StdioConfiguration, 3> Stdio;
std::vector<ProcessConfiguration> Processes;
std::string WorkingDirectory;
bool MergedBuiltinStreams = false;
bool Detached = false;
uv_loop_t* Loop = nullptr;
};
class cmUVProcessChain
{
public:
enum class ExceptionCode
{
None,
Fault,
Illegal,
Interrupt,
Numerical,
Spawn,
Other,
};
struct Status
{
int SpawnResult;
bool Finished;
int64_t ExitStatus;
int TermSignal;
std::pair<ExceptionCode, std::string> GetException() const;
};
cmUVProcessChain(cmUVProcessChain const& other) = delete;
cmUVProcessChain(cmUVProcessChain&& other) noexcept;
~cmUVProcessChain();
cmUVProcessChain& operator=(cmUVProcessChain const& other) = delete;
cmUVProcessChain& operator=(cmUVProcessChain&& other) noexcept;
uv_loop_t& GetLoop();
// FIXME: Add stdin support
int OutputStream();
int ErrorStream();
bool Valid() const;
bool Wait(uint64_t milliseconds = 0);
std::vector<Status const*> GetStatus() const;
Status const& GetStatus(std::size_t index) const;
bool Finished() const;
/** Terminate any remaining child processes.
Call this only after exiting the event loop, and at most once. */
void Terminate();
private:
friend class cmUVProcessChainBuilder;
cmUVProcessChain();
struct InternalData;
std::unique_ptr<InternalData> Data;
};
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