Implement Project Manager 'build' button for Mac and Linux(#4248)

Signed-off-by: Steve Pham <spham@amazon.com>

Code/Tools/ProjectManager/Platform/Linux/ProjectBuilderWorker_linux.cpp

@@ -7,14 +7,69 @@
  */
 
 #include <ProjectBuilderWorker.h>
+#include <ProjectManagerDefs.h>
+#include <ProjectUtils.h>
+
+#include <QDir>
+#include <QString>
 
 namespace O3DE::ProjectManager
 {
-    AZ::Outcome<void, QString> ProjectBuilderWorker::BuildProjectForPlatform()
+    AZ::Outcome<QStringList, QString> ProjectBuilderWorker::ConstructCmakeGenerateProjectArguments(const QString& thirdPartyPath) const
     {
-        QString error = tr("Automatic building on Linux not currently supported!");
-        QStringToAZTracePrint(error);
-        return AZ::Failure(error);
+        // Attempt to use the Ninja build system if it is installed (described in the o3de documentation) if possible,
+        // otherwise default to the the default for Linux (Unix Makefiles)
+        auto    whichNinjaResult = ProjectUtils::ExecuteCommandResult("which", QStringList{"ninja"}, QProcessEnvironment::systemEnvironment());
+        QString cmakeGenerator = (whichNinjaResult.IsSuccess()) ? "Ninja Multi-Config" : "Unix Makefiles";
+        bool    compileProfileOnBuild = (whichNinjaResult.IsSuccess());
+
+        // On Linux the default compiler is gcc. For O3DE, it is clang, so we need to specify the version of clang that is detected
+        // in order to get the compiler option.
+        auto compilerOptionResult = ProjectUtils::FindSupportedCompilerForPlatform();
+        if (!compilerOptionResult.IsSuccess())
+        {
+            return AZ::Failure(compilerOptionResult.GetError());
+        }
+        auto clangCompilers = compilerOptionResult.GetValue().split('|');
+        AZ_Assert(clangCompilers.length()==2, "Invalid clang compiler pair specification");
+
+        QString clangCompilerOption = clangCompilers[0];
+        QString clangPPCompilerOption = clangCompilers[1];
+        QString targetBuildPath = QDir(m_projectInfo.m_path).filePath(ProjectBuildPathPostfix);
+        QStringList generateProjectArgs = QStringList{ProjectCMakeCommand,
+                                                      "-B", ProjectBuildPathPostfix,
+                                                      "-S", ".",
+                                                      QString("-G%1").arg(cmakeGenerator),
+                                                      QString("-DCMAKE_C_COMPILER=").append(clangCompilerOption),
+                                                      QString("-DCMAKE_CXX_COMPILER=").append(clangPPCompilerOption),
+                                                      QString("-DLY_3RDPARTY_PATH=").append(thirdPartyPath)};
+        if (!compileProfileOnBuild)
+        {
+            generateProjectArgs.append("-DCMAKE_BUILD_TYPE=profile");
+        }
+        return AZ::Success(generateProjectArgs);
     }
-    
+
+    AZ::Outcome<QStringList, QString> ProjectBuilderWorker::ConstructCmakeBuildCommandArguments() const
+    {
+        auto    whichNinjaResult = ProjectUtils::ExecuteCommandResult("which", QStringList{"ninja"}, QProcessEnvironment::systemEnvironment());
+        bool    compileProfileOnBuild = (whichNinjaResult.IsSuccess());
+        QString targetBuildPath = QDir(m_projectInfo.m_path).filePath(ProjectBuildPathPostfix);
+        QString launcherTargetName = m_projectInfo.m_projectName + ".GameLauncher";
+
+        QStringList buildProjectArgs = QStringList{ProjectCMakeCommand,
+                                                   "--build", ProjectBuildPathPostfix,
+                                                   "--target", launcherTargetName, ProjectCMakeBuildTargetEditor};
+        if (compileProfileOnBuild)
+        {
+            buildProjectArgs.append(QStringList{"--config","profile"});
+        }
+        return AZ::Success(buildProjectArgs);
+    }
+
+    AZ::Outcome<QStringList, QString> ProjectBuilderWorker::ConstructKillProcessCommandArguments(const QString& pidToKill) const
+    {
+        return AZ::Success(QStringList{"kill", "-9", pidToKill});
+    }
+
 } // namespace O3DE::ProjectManager

Code/Tools/ProjectManager/Platform/Linux/ProjectUtils_linux.cpp

@@ -6,15 +6,48 @@
  */
 
 #include <ProjectUtils.h>
+#include <ProjectManagerDefs.h>
+#include <QProcessEnvironment>
 
 namespace O3DE::ProjectManager
 {
     namespace ProjectUtils
     {
-        AZ::Outcome<void, QString> FindSupportedCompilerForPlatform()
+        // The list of clang C/C++ compiler command lines to validate on the host Linux system
+        const QStringList SupportedClangCommands = {"clang-12|clang++-12"};
+
+        AZ::Outcome<QProcessEnvironment, QString> GetCommandLineProcessEnvironment()
         {
-            // Compiler detection not supported on platform
-            return AZ::Success();
+            return AZ::Success(QProcessEnvironment(QProcessEnvironment::systemEnvironment()));
+        }
+
+        AZ::Outcome<QString, QString> FindSupportedCompilerForPlatform()
+        {
+            // Validate that cmake is installed and is in the command line
+            auto whichCMakeResult = ProjectUtils::ExecuteCommandResult("which", QStringList{ProjectCMakeCommand}, QProcessEnvironment::systemEnvironment());
+            if (!whichCMakeResult.IsSuccess())
+            {
+                return AZ::Failure(QObject::tr("CMake not found. \n\n"
+                    "Make sure that the minimum version of CMake is installed and available from the command prompt. "
+                    "Refer to the <a href='https://o3de.org/docs/welcome-guide/setup/requirements/#cmake'>O3DE requirements</a> page for more information."));
+            }
+
+            // Look for the first compatible version of clang. The list below will contain the known clang compilers that have been tested for O3DE.
+            for (const QString& supportClangCommand : SupportedClangCommands)
+            {
+                auto clangCompilers = supportClangCommand.split('|');
+                AZ_Assert(clangCompilers.length()==2, "Invalid clang compiler pair specification");
+
+                auto whichClangResult = ProjectUtils::ExecuteCommandResult("which", QStringList{clangCompilers[0]}, QProcessEnvironment::systemEnvironment());
+                auto whichClangPPResult = ProjectUtils::ExecuteCommandResult("which", QStringList{clangCompilers[1]}, QProcessEnvironment::systemEnvironment());
+                if (whichClangResult.IsSuccess() && whichClangPPResult.IsSuccess())
+                {
+                    return AZ::Success(supportClangCommand);
+                }
+            }
+            return AZ::Failure(QObject::tr("Clang not found. \n\n"
+                "Make sure that the clang is installed and available from the command prompt. "
+                "Refer to the <a href='https://o3de.org/docs/welcome-guide/setup/requirements/#cmake'>O3DE requirements</a> page for more information."));
         }
         
     } // namespace ProjectUtils