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SessionSourceControl.cpp
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SessionSourceControl.cpp
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/*
* SessionSourceControl.cpp
*
* Copyright (C) 2009-11 by RStudio, Inc.
*
* This program is licensed to you under the terms of version 3 of the
* GNU Affero General Public License. This program is distributed WITHOUT
* ANY EXPRESS OR IMPLIED WARRANTY, INCLUDING THOSE OF NON-INFRINGEMENT,
* MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. Please refer to the
* AGPL (http://www.gnu.org/licenses/agpl-3.0.txt) for more details.
*
*/
#include "SessionSourceControl.hpp"
#include <signal.h>
#ifdef _WIN32
#include <windows.h>
#include <shlobj.h>
#include <shlwapi.h>
#endif
#include <boost/algorithm/string.hpp>
#include <boost/algorithm/string/trim.hpp>
#include <boost/algorithm/string/split.hpp>
#include <boost/algorithm/string/predicate.hpp>
#include <boost/foreach.hpp>
#include <boost/function.hpp>
#include <boost/lexical_cast.hpp>
#include <boost/optional.hpp>
#include <boost/regex.hpp>
#include <core/json/JsonRpc.hpp>
#include <core/system/ShellUtils.hpp>
#include <core/system/System.hpp>
#include <core/system/Process.hpp>
#include <core/Exec.hpp>
#include <core/FileSerializer.hpp>
#include <core/Scope.hpp>
#include <core/StringUtils.hpp>
#include <session/SessionUserSettings.hpp>
#include <session/SessionModuleContext.hpp>
#include <session/projects/SessionProjects.hpp>
#include "SessionConsoleProcess.hpp"
// TODO: git fetch doesn't work due to path differences between bash and cmd
// TODO: Discover/configure git bin dir, and add it to the path (needed to find ssh)
// TODO: It's actually pretty easy to look in an id_rsa file and see if it's encrypted,
// use that to see if we even need to do ssh-agent stuff at all
// TODO: We could use the "right" ssh key if we wanted to, by reading ~/.ssh/config:
// http://technosophos.com/content/ssh-host-configuration
using namespace core;
using namespace core::shell_utils;
using session::modules::console_process::ConsoleProcess;
namespace session {
namespace modules {
namespace source_control {
namespace {
enum PatchMode
{
PatchModeWorking = 0,
PatchModeStage = 1
};
struct CommitInfo
{
std::string id;
std::string author;
std::string subject;
std::string description;
std::string parent;
boost::int64_t date; // millis since epoch, UTC
};
void enqueueRefreshEvent()
{
module_context::enqueClientEvent(ClientEvent(client_events::kVcsRefresh));
}
class VCSImpl : boost::noncopyable
{
public:
VCSImpl(FilePath rootDir)
{
root_ = rootDir;
}
virtual ~VCSImpl()
{
}
virtual VCS id() { return VCSNone; }
virtual std::string name() { return std::string(); }
FilePath root() { return root_; }
virtual core::Error status(const FilePath&,
StatusResult* pStatusResult)
{
*pStatusResult = StatusResult();
return Success();
}
virtual core::Error add(const std::vector<FilePath>& filePaths,
std::string* pStdErr)
{
return Success();
}
virtual core::Error remove(const std::vector<FilePath>& filePaths,
std::string* pStdErr)
{
return Success();
}
virtual core::Error discard(const std::vector<FilePath>& filePaths,
std::string* pStdErr)
{
return Success();
}
virtual core::Error revert(const std::vector<FilePath>& filePaths,
std::string* pStdErr)
{
return Success();
}
virtual core::Error stage(const std::vector<FilePath>& filePaths,
std::string* pStdErr)
{
return Success();
}
virtual core::Error unstage(const std::vector<FilePath>& filePaths,
std::string* pStdErr)
{
return Success();
}
virtual core::Error listBranches(std::vector<std::string>* pBranches,
boost::optional<size_t>* pActiveBranchIndex,
std::string* pStdErr)
{
return Success();
}
virtual core::Error checkout(const std::string& id,
std::string* pStdErr)
{
return Success();
}
core::Error runCommand(const ShellCommand& command,
std::vector<std::string>* pOutputLines=NULL)
{
std::string output;
Error error = runCommand(command, &output, NULL);
if (error)
return error;
if (pOutputLines)
{
boost::algorithm::split(*pOutputLines, output,
boost::algorithm::is_any_of("\r\n"));
}
return Success();
}
core::Error runCommand(const ShellCommand& command,
std::string* pOutput,
std::string* pStdErr)
{
std::string cmd = shell_utils::join(
ShellCommand(std::string("cd")) << root_,
command);
core::system::ProcessResult result;
Error error = core::system::runCommand(cmd,
core::system::ProcessOptions(),
&result);
if (error)
return error;
if (pOutput)
*pOutput = result.stdOut;
if (pStdErr)
*pStdErr = result.stdErr;
return Success();
}
virtual core::Error diffFile(const FilePath& filePath,
PatchMode mode,
int contextLines,
std::string* pOutput)
{
return Success();
}
virtual core::Error applyPatch(const FilePath& patchFile,
PatchMode patchMode,
std::string* pStdErr)
{
return Success();
}
virtual core::Error log(const std::string& rev,
int maxentries,
std::vector<CommitInfo>* pOutput)
{
return Success();
}
virtual core::Error show(const std::string& rev,
std::string* pOutput)
{
return Success();
}
protected:
FilePath root_;
};
namespace {
boost::scoped_ptr<VCSImpl> s_pVcsImpl_;
std::vector<int> s_pidsToTerminate_;
ShellCommand git()
{
return ShellCommand("git");
}
ShellCommand svn()
{
return ShellCommand("svn");
}
} // anonymous namespace
class GitVCSImpl : public VCSImpl
{
public:
static FilePath detectGitDir(FilePath workingDir)
{
std::string command = shell_utils::join_and(
ShellCommand("cd") << workingDir,
git() << "rev-parse" << "--show-toplevel");
core::system::ProcessResult result;
Error error = core::system::runCommand(command,
core::system::ProcessOptions(),
&result);
if (error)
return FilePath();
if (result.exitStatus != 0)
return FilePath();
return FilePath(boost::algorithm::trim_copy(result.stdOut));
}
GitVCSImpl(FilePath repoDir) : VCSImpl(repoDir)
{
}
VCS id() { return VCSGit; }
std::string name() { return "Git"; }
core::Error status(const FilePath& dir, StatusResult* pStatusResult)
{
using namespace boost;
std::vector<FileWithStatus> files;
std::vector<std::string> args;
args.push_back("status");
args.push_back("--porcelain");
args.push_back("--");
args.push_back(string_utils::utf8ToSystem(dir.absolutePath()));
std::vector<std::string> lines;
Error error = runCommand(
git() << "status" << "--porcelain" << "--" << dir,
&lines);
if (error)
return error;
for (std::vector<std::string>::iterator it = lines.begin();
it != lines.end();
it++)
{
std::string line = *it;
if (line.length() < 4)
continue;
FileWithStatus file;
file.status = line.substr(0, 2);
std::string filePath = line.substr(3);
if (filePath.length() > 1 && filePath[filePath.length() - 1] == '/')
filePath = filePath.substr(0, filePath.size() - 1);
file.path = root_.childPath(string_utils::systemToUtf8(filePath));
files.push_back(file);
}
*pStatusResult = StatusResult(files);
return Success();
}
core::Error doSimpleCmd(const ShellCommand& command,
std::string* pStdErr)
{
return runCommand(command, NULL, pStdErr);
}
core::Error add(const std::vector<FilePath>& filePaths,
std::string* pStdErr)
{
return doSimpleCmd(git() << "add" << "--" << filePaths,
pStdErr);
}
core::Error remove(const std::vector<FilePath>& filePaths,
std::string* pStdErr)
{
return doSimpleCmd(git() << "rm" << "--" << filePaths,
pStdErr);
}
core::Error discard(const std::vector<FilePath>& filePaths,
std::string* pStdErr)
{
std::vector<std::string> args;
args.push_back("-f"); // don't fail on unmerged entries
return doSimpleCmd(
git() << "checkout" << "-f" << "--" << filePaths,
pStdErr);
}
core::Error revert(const std::vector<FilePath>& filePaths,
std::string* pStdErr)
{
Error error = doSimpleCmd(
git() << "reset" << "HEAD" << "--" << filePaths,
pStdErr);
if (error)
return error;
std::vector<std::string> args2;
args2.push_back("-f"); // don't fail on unmerged entries
return doSimpleCmd(
git() << "checkout" << "-f" << "--" << filePaths,
pStdErr);
}
core::Error stage(const std::vector<FilePath> &filePaths,
std::string *pStdErr)
{
StatusResult statusResult;
this->status(root_, &statusResult);
std::vector<FilePath> filesToAdd;
std::vector<FilePath> filesToRm;
BOOST_FOREACH(const FilePath& path, filePaths)
{
std::string status = statusResult.getStatus(path).status();
if (status.size() < 2)
continue;
if (status[1] == 'D')
filesToRm.push_back(path);
else if (status[1] != ' ')
filesToAdd.push_back(path);
}
Error error;
if (!filesToAdd.empty())
{
error = this->add(filesToAdd, pStdErr);
if (error)
return error;
}
if (!filesToRm.empty())
{
error = this->remove(filesToRm, pStdErr);
if (error)
return error;
}
return Success();
}
core::Error unstage(const std::vector<FilePath>& filePaths,
std::string* pStdErr)
{
return doSimpleCmd(git() << "reset" << "HEAD" << "--" << filePaths,
pStdErr);
}
core::Error listBranches(std::vector<std::string>* pBranches,
boost::optional<size_t>* pActiveBranchIndex,
std::string* pStdErr)
{
std::vector<std::string> lines;
Error error = runCommand(git() << "branch", &lines);
if (error)
return error;
for (size_t i = 0; i < lines.size(); i++)
{
const std::string line = lines.at(i);
if (line.size() < 2)
break;
if (boost::algorithm::starts_with(line, "* "))
*pActiveBranchIndex = i;
pBranches->push_back(line.substr(2));
}
return Success();
}
core::Error checkout(const std::string& id,
std::string* pStdErr)
{
return runCommand(git() << "checkout" << id << "--");
}
core::Error commit(const std::string& message, bool amend, bool signOff)
{
FilePath tempFile = module_context::tempFile("gitmsg", "txt");
boost::shared_ptr<std::ostream> pStream;
Error error = tempFile.open_w(&pStream);
if (error)
return error;
*pStream << message;
pStream->flush();
pStream.reset(); // release file handle
ShellCommand command = git() << "commit" << "-F" << tempFile;
if (amend)
command << "--amend";
if (signOff)
command << "--signoff";
std::string stdErr;
error = doSimpleCmd(command, &stdErr);
// clean up commit message temp file
Error removeError = tempFile.remove();
if (removeError)
LOG_ERROR(removeError);
return error;
}
core::Error push(std::string* pHandle)
{
boost::shared_ptr<ConsoleProcess> ptrProc =
console_process::ConsoleProcess::create(git() << "push",
&enqueueRefreshEvent);
*pHandle = ptrProc->handle();
return Success();
}
core::Error pull(std::string* pHandle)
{
boost::shared_ptr<ConsoleProcess> ptrProc =
console_process::ConsoleProcess::create(git() << "pull",
&enqueueRefreshEvent);
*pHandle = ptrProc->handle();
return Success();
}
core::Error diffFile(const FilePath& filePath,
PatchMode mode,
int contextLines,
std::string* pOutput)
{
ShellCommand command = git() << "diff";
command << "-U" + boost::lexical_cast<std::string>(contextLines);
if (mode == PatchModeStage)
command << "--cached";
command << "--";
command << filePath;
Error error = runCommand(command, pOutput, NULL);
if (error)
return error;
return Success();
}
boost::int64_t convertGitRawDate(const std::string& time,
const std::string& timeZone)
{
boost::int64_t secs = safe_convert::stringTo<boost::int64_t>(time, 0);
int offset = safe_convert::stringTo<int>(timeZone, 0);
// Positive timezone offset means we have to SUBTRACT
// the offset to get UTC time, and vice versa
int factor = offset > 0 ? -1 : 1;
offset = abs(offset);
int hours = offset / 100;
int minutes = offset % 100;
secs += factor * (hours * 60*60);
secs += factor * (minutes * 60);
return secs;
}
core::Error applyPatch(const FilePath& patchFile,
PatchMode patchMode,
std::string* pStdErr)
{
ShellCommand cmd = git() << "apply";
if (patchMode == PatchModeStage)
cmd << "--cached";
cmd << "--";
cmd << patchFile;
return doSimpleCmd(cmd, pStdErr);
}
core::Error log(const std::string& rev,
int maxentries,
std::vector<CommitInfo>* pOutput)
{
std::vector<std::string> outLines;
std::vector<std::string> args;
args.push_back("log");
args.push_back("--pretty=raw");
args.push_back("--abbrev-commit");
args.push_back("--abbrev=8");
ShellCommand cmd = git() << "log";
cmd << "--pretty=raw" << "--abbrev-commit" << "--abbrev=8";
if (maxentries >= 0)
cmd << "-" + boost::lexical_cast<std::string>(maxentries);
if (!rev.empty())
cmd << rev;
Error error = runCommand(cmd, &outLines);
if (error)
return error;
boost::regex kvregex("^(\\w+) (.*)$");
boost::regex authTimeRegex("^(.*?) (\\d+) ([+\\-]?\\d+)$");
CommitInfo currentCommit;
for (std::vector<std::string>::const_iterator it = outLines.begin();
it != outLines.end();
it++)
{
boost::smatch smatch;
if (boost::regex_search(*it, smatch, kvregex))
{
std::string key = smatch[1];
std::string value = smatch[2];
if (key == "commit")
{
if (!currentCommit.id.empty())
pOutput->push_back(currentCommit);
currentCommit = CommitInfo();
currentCommit.id = value;
}
else if (key == "author" || key == "committer")
{
boost::smatch authTimeMatch;
if (boost::regex_search(value, authTimeMatch, authTimeRegex))
{
std::string author = authTimeMatch[1];
std::string time = authTimeMatch[2];
std::string tz = authTimeMatch[3];
if (key == "author")
currentCommit.author = author;
else // if (key == "committer")
currentCommit.date = convertGitRawDate(time, tz);
}
}
else if (key == "parent")
{
if (!currentCommit.parent.empty())
currentCommit.parent.push_back(' ');
currentCommit.parent.append(value, 0, 8);
}
}
else if (boost::starts_with(*it, " "))
{
if (currentCommit.subject.empty())
currentCommit.subject = it->substr(4);
if (!currentCommit.description.empty())
currentCommit.description.append("\n");
currentCommit.description.append(it->substr(4));
}
else if (it->length() == 0)
{
}
else
{
LOG_ERROR_MESSAGE("Unexpected git-log output");
}
}
if (!currentCommit.id.empty())
pOutput->push_back(currentCommit);
return Success();
}
virtual core::Error show(const std::string& rev,
std::string* pOutput)
{
return runCommand(git() << "show" << "--pretty=oneline" << "-M" << rev,
pOutput, NULL);
}
};
class SubversionVCSImpl : public VCSImpl
{
public:
SubversionVCSImpl(FilePath rootDir) : VCSImpl(rootDir)
{
}
VCS id() { return VCSSubversion; }
std::string name() { return "SVN"; }
core::Error status(const FilePath& dir, StatusResult* pStatusResult)
{
using namespace boost;
std::vector<FileWithStatus> files;
std::vector<std::string> lines;
Error error = runCommand(
svn() << "status" << "--non-interactive" << "--depth=immediates"
<< "--" << dir,
&lines);
if (error)
return error;
for (std::vector<std::string>::iterator it = lines.begin();
it != lines.end();
it++)
{
std::string line = *it;
if (line.length() < 4)
continue;
FileWithStatus file;
file.status = line.substr(0, 7);
std::string filePath = line.substr(8);
if (filePath.length() > 1 && filePath[filePath.length() - 1] == '/')
filePath = filePath.substr(0, filePath.size() - 1);
file.path = FilePath(string_utils::systemToUtf8(filePath));
files.push_back(file);
}
*pStatusResult = StatusResult(files);
return Success();
}
core::Error revert(const std::vector<FilePath>& filePaths,
std::string* pStdErr)
{
return runCommand(svn() << "revert" << "--" << filePaths,
NULL, pStdErr);
}
};
FilePath resolveAliasedPath(std::string path)
{
if (boost::algorithm::starts_with(path, "~/"))
return module_context::resolveAliasedPath(path);
else
return s_pVcsImpl_->root().childPath(path);
}
std::vector<FilePath> resolveAliasedPaths(json::Array paths)
{
std::vector<FilePath> parsedPaths;
for (json::Array::iterator it = paths.begin();
it != paths.end();
it++)
{
json::Value value = *it;
parsedPaths.push_back(resolveAliasedPath(value.get_str()));
}
return parsedPaths;
}
} // anonymous namespace
VCS activeVCS()
{
return s_pVcsImpl_->id();
}
std::string activeVCSName()
{
return s_pVcsImpl_->name();
}
VCSStatus StatusResult::getStatus(const FilePath& fileOrDirectory) const
{
std::map<std::string, VCSStatus>::const_iterator found =
this->filesByPath_.find(fileOrDirectory.absolutePath());
if (found != this->filesByPath_.end())
return found->second;
return VCSStatus();
}
core::Error status(const FilePath& dir, StatusResult* pStatusResult)
{
return s_pVcsImpl_->status(dir, pStatusResult);
}
Error fileStatus(const FilePath& filePath, VCSStatus* pStatus)
{
StatusResult statusResult;
Error error = source_control::status(filePath.parent(), &statusResult);
if (error)
return error;
*pStatus = statusResult.getStatus(filePath);
return Success();
}
namespace {
struct RefreshOnExit : public boost::noncopyable
{
~RefreshOnExit()
{
try
{
enqueueRefreshEvent();
}
catch(...)
{
}
}
};
Error vcsAdd(const json::JsonRpcRequest& request,
json::JsonRpcResponse* pResponse)
{
RefreshOnExit refreshOnExit;
json::Array paths;
Error error = json::readParam(request.params, 0, &paths);
if (error)
return error ;
return s_pVcsImpl_->add(resolveAliasedPaths(paths), NULL);
}
Error vcsRemove(const json::JsonRpcRequest& request,
json::JsonRpcResponse* pResponse)
{
RefreshOnExit refreshOnExit;
json::Array paths;
Error error = json::readParam(request.params, 0, &paths);
if (error)
return error ;
return s_pVcsImpl_->remove(resolveAliasedPaths(paths), NULL);
}
Error vcsDiscard(const json::JsonRpcRequest& request,
json::JsonRpcResponse* pResponse)
{
RefreshOnExit refreshOnExit;
json::Array paths;
Error error = json::readParam(request.params, 0, &paths);
if (error)
return error ;
return s_pVcsImpl_->discard(resolveAliasedPaths(paths), NULL);
}
Error vcsRevert(const json::JsonRpcRequest& request,
json::JsonRpcResponse* pResponse)
{
RefreshOnExit refreshOnExit;
json::Array paths;
Error error = json::readParam(request.params, 0, &paths);
if (error)
return error ;
return s_pVcsImpl_->revert(resolveAliasedPaths(paths), NULL);
}
Error vcsStage(const json::JsonRpcRequest& request,
json::JsonRpcResponse* pResponse)
{
RefreshOnExit refreshOnExit;
json::Array paths;
Error error = json::readParam(request.params, 0, &paths);
if (error)
return error ;
return s_pVcsImpl_->stage(resolveAliasedPaths(paths), NULL);
}
Error vcsUnstage(const json::JsonRpcRequest& request,
json::JsonRpcResponse* pResponse)
{
RefreshOnExit refreshOnExit;
json::Array paths;
Error error = json::readParam(request.params, 0, &paths);
if (error)
return error ;
return s_pVcsImpl_->unstage(resolveAliasedPaths(paths), NULL);
}
Error vcsListBranches(const json::JsonRpcRequest& request,
json::JsonRpcResponse* pResponse)
{
std::vector<std::string> branches;
boost::optional<size_t> activeIndex;
std::string stdErr;
Error error = s_pVcsImpl_->listBranches(&branches, &activeIndex, &stdErr);
if (error)
return error;
json::Array jsonBranches;
std::transform(branches.begin(), branches.end(),
std::back_inserter(jsonBranches),
json::toJsonString);
json::Object result;
result["branches"] = jsonBranches;
result["activeIndex"] =
activeIndex
? json::Value(static_cast<boost::uint64_t>(activeIndex.get()))
: json::Value();
pResponse->setResult(result);
return Success();
}
Error vcsCheckout(const json::JsonRpcRequest& request,
json::JsonRpcResponse* pResponse)
{
RefreshOnExit refreshOnExit;
std::string id;
Error error = json::readParams(request.params, &id);
if (error)
return error;
std::string stdErr;
error = s_pVcsImpl_->checkout(id, &stdErr);
if (error)
return error;
return Success();
}
Error vcsFullStatus(const json::JsonRpcRequest&,
json::JsonRpcResponse* pResponse)
{
StatusResult statusResult;
Error error = s_pVcsImpl_->status(s_pVcsImpl_->root(), &statusResult);
if (error)
return error;
std::vector<FileWithStatus> files = statusResult.files();
json::Array result;
for (std::vector<FileWithStatus>::const_iterator it = files.begin();
it != files.end();
it++)
{
VCSStatus status = it->status;
FilePath path = it->path;
json::Object obj;
obj["status"] = status.status();
obj["path"] = path.relativePath(s_pVcsImpl_->root());
obj["raw_path"] = path.absolutePath();
obj["discardable"] = status.status()[1] != ' ' && status.status()[1] != '?';
result.push_back(obj);
}
pResponse->setResult(result);
return Success();
}
Error vcsCommitGit(const json::JsonRpcRequest& request,
json::JsonRpcResponse* pResponse)
{
RefreshOnExit refreshOnExit;
GitVCSImpl* pGit = dynamic_cast<GitVCSImpl*>(s_pVcsImpl_.get());
if (!pGit)
return systemError(boost::system::errc::operation_not_supported, ERROR_LOCATION);
std::string commitMsg;
bool amend, signOff;
Error error = json::readParams(request.params, &commitMsg, &amend, &signOff);
if (error)
return error;
error = pGit->commit(commitMsg, amend, signOff);
if (error)
return error;
return Success();
}
Error vcsPush(const json::JsonRpcRequest& request,
json::JsonRpcResponse* pResponse)
{
GitVCSImpl* pGit = dynamic_cast<GitVCSImpl*>(s_pVcsImpl_.get());
if (!pGit)
return systemError(boost::system::errc::operation_not_supported, ERROR_LOCATION);
std::string handle;
Error error = pGit->push(&handle);
if (error)
return error;
pResponse->setResult(handle);
return Success();
}
Error vcsPull(const json::JsonRpcRequest& request,
json::JsonRpcResponse* pResponse)
{
GitVCSImpl* pGit = dynamic_cast<GitVCSImpl*>(s_pVcsImpl_.get());
if (!pGit)
return systemError(boost::system::errc::operation_not_supported, ERROR_LOCATION);
std::string handle;
Error error = pGit->pull(&handle);
if (error)
return error;
pResponse->setResult(handle);
return Success();
}
Error vcsDiffFile(const json::JsonRpcRequest& request,
json::JsonRpcResponse* pResponse)
{
std::string path;
int mode;
int contextLines;
Error error = json::readParams(request.params,
&path,
&mode,
&contextLines);
if (error)
return error;
if (contextLines < 0)
contextLines = 999999999;
std::string output;