Ninja: Add the Ninja generator

1 files changed, 329 insertions, 0 deletions

diff --git a/Source/cmGlobalNinjaGenerator.h b/Source/cmGlobalNinjaGenerator.h
new file mode 100644
index 0000000..171d14b
--- /dev/null
+++ b/Source/cmGlobalNinjaGenerator.h
@@ -0,0 +1,329 @@
+/*============================================================================
+  CMake - Cross Platform Makefile Generator
+  Copyright 2011 Peter Collingbourne <peter@pcc.me.uk>
+  Copyright 2011 Nicolas Despres <nicolas.despres@gmail.com>
+
+  Distributed under the OSI-approved BSD License (the "License");
+  see accompanying file Copyright.txt for details.
+
+  This software is distributed WITHOUT ANY WARRANTY; without even the
+  implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+  See the License for more information.
+============================================================================*/
+#ifndef cmGlobalNinjaGenerator_h
+#  define cmGlobalNinjaGenerator_h
+
+#  include "cmGlobalGenerator.h"
+#  include "cmNinjaTypes.h"
+
+class cmLocalGenerator;
+class cmGeneratedFileStream;
+
+/**
+ * \class cmGlobalNinjaGenerator
+ * \brief Write a build.ninja file.
+ *
+ * The main differences between this generator and the UnixMakefile
+ * generator family are:
+ * - We don't care about VERBOSE variable or RULE_MESSAGES property since
+ *   it is handle by Ninja's -v option.
+ * - We don't care about computing any progress status since Ninja manages
+ *   it itself.
+ * - We don't care about generating a clean target since Ninja already have
+ *   a clean tool.
+ * - We generate one build.ninja and one rules.ninja per project.
+ * - We try to minimize the number of generated rules: one per target and
+ *   language.
+ * - We use Ninja special variable $in and $out to produce nice output.
+ * - We extensively use Ninja variable overloading system to minimize the
+ *   number of generated rules.
+ */
+class cmGlobalNinjaGenerator : public cmGlobalGenerator
+{
+public:
+  /// The default name of Ninja's build file. Typically: build.ninja.
+  static const char* NINJA_BUILD_FILE;
+
+  /// The default name of Ninja's rules file. Typically: rules.ninja.
+  /// It is included in the main build.ninja file.
+  static const char* NINJA_RULES_FILE;
+
+  /// The indentation string used when generating Ninja's build file.
+  static const char* INDENT;
+
+  /// Write @a count times INDENT level to output stream @a os.
+  static void Indent(std::ostream& os, int count);
+
+  /// Write a divider in the given output stream @a os.
+  static void WriteDivider(std::ostream& os);
+
+  static std::string EncodeIdent(const std::string &ident, std::ostream &vars);
+  static std::string EncodeLiteral(const std::string &lit);
+
+  /**
+   * Write the given @a comment to the output stream @a os. It
+   * handles new line character properly.
+   */
+  static void WriteComment(std::ostream& os, const std::string& comment);
+
+  /**
+   * Write a build statement to @a os with the @a comment using
+   * the @a rule the list of @a outputs files and inputs.
+   * It also writes the variables bound to this build statement.
+   * @warning no escaping of any kind is done here.
+   */
+  static void WriteBuild(std::ostream& os,
+                         const std::string& comment,
+                         const std::string& rule,
+                         const cmNinjaDeps& outputs,
+                         const cmNinjaDeps& explicitDeps,
+                         const cmNinjaDeps& implicitDeps,
+                         const cmNinjaDeps& orderOnlyDeps,
+                         const cmNinjaVars& variables);
+
+  /**
+   * Helper to write a build statement with the special 'phony' rule.
+   */
+  static void WritePhonyBuild(std::ostream& os,
+                              const std::string& comment,
+                              const cmNinjaDeps& outputs,
+                              const cmNinjaDeps& explicitDeps,
+                              const cmNinjaDeps& implicitDeps = cmNinjaDeps(),
+                              const cmNinjaDeps& orderOnlyDeps = cmNinjaDeps(),
+                              const cmNinjaVars& variables = cmNinjaVars());
+
+  void WriteCustomCommandBuild(const std::string& command,
+                               const std::string& description,
+                               const std::string& comment,
+                               const cmNinjaDeps& outputs,
+                               const cmNinjaDeps& deps = cmNinjaDeps(),
+                             const cmNinjaDeps& orderOnlyDeps = cmNinjaDeps());
+
+  /**
+   * Write a rule statement named @a name to @a os with the @a comment,
+   * the mandatory @a command, the @a depfile and the @a description.
+   * It also writes the variables bound to this rule statement.
+   * @warning no escaping of any kind is done here.
+   */
+  static void WriteRule(std::ostream& os,
+                        const std::string& name,
+                        const std::string& command,
+                        const std::string& description,
+                        const std::string& comment = "",
+                        const std::string& depfile = "",
+                        bool restat = false,
+                        bool generator = false);
+
+  /**
+   * Write a variable named @a name to @a os with value @a value and an
+   * optional @a comment. An @a indent level can be specified.
+   * @warning no escaping of any kind is done here.
+   */
+  static void WriteVariable(std::ostream& os,
+                            const std::string& name,
+                            const std::string& value,
+                            const std::string& comment = "",
+                            int indent = 0);
+
+  /**
+   * Write an include statement including @a filename with an optional
+   * @a comment to the @a os stream.
+   */
+  static void WriteInclude(std::ostream& os,
+                           const std::string& filename,
+                           const std::string& comment = "");
+
+  /**
+   * Write a default target statement specifying @a targets as
+   * the default targets.
+   */
+  static void WriteDefault(std::ostream& os,
+                           const cmNinjaDeps& targets,
+                           const std::string& comment = "");
+
+public:
+  /// Default constructor.
+  cmGlobalNinjaGenerator();
+
+  /// Convenience method for creating an instance of this class.
+  static cmGlobalGenerator* New() {
+    return new cmGlobalNinjaGenerator; }
+
+  /// Destructor.
+  virtual ~cmGlobalNinjaGenerator() { }
+
+  /// Overloaded methods. @see cmGlobalGenerator::CreateLocalGenerator()
+  virtual cmLocalGenerator* CreateLocalGenerator();
+
+  /// Overloaded methods. @see cmGlobalGenerator::GetName().
+  virtual const char* GetName() const {
+    return cmGlobalNinjaGenerator::GetActualName(); }
+
+  /// @return the name of this generator.
+  static const char* GetActualName() { return "Ninja"; }
+
+  /// Overloaded methods. @see cmGlobalGenerator::GetDocumentation()
+  virtual void GetDocumentation(cmDocumentationEntry& entry) const;
+
+  /// Overloaded methods. @see cmGlobalGenerator::Generate()
+  virtual void Generate();
+
+  /// Overloaded methods. @see cmGlobalGenerator::EnableLanguage()
+  virtual void EnableLanguage(std::vector<std::string>const& languages,
+                              cmMakefile* mf,
+                              bool optional);
+
+  /// Overloaded methods. @see cmGlobalGenerator::GenerateBuildCommand()
+  virtual std::string GenerateBuildCommand(const char* makeProgram,
+                                           const char* projectName,
+                                           const char* additionalOptions,
+                                           const char* targetName,
+                                           const char* config,
+                                           bool ignoreErrors,
+                                           bool fast);
+
+  // Setup target names
+  virtual const char* GetAllTargetName()           const { return "all"; }
+  virtual const char* GetInstallTargetName()       const { return "install"; }
+  virtual const char* GetInstallLocalTargetName()  const {
+    return "install/local";
+  }
+  virtual const char* GetInstallStripTargetName()  const {
+    return "install/strip";
+  }
+  virtual const char* GetTestTargetName()          const { return "test"; }
+  virtual const char* GetPackageTargetName()       const { return "package"; }
+  virtual const char* GetPackageSourceTargetName() const {
+    return "package_source";
+  }
+  virtual const char* GetEditCacheTargetName()     const {
+    return "edit_cache";
+  }
+  virtual const char* GetRebuildCacheTargetName()  const {
+    return "rebuild_cache";
+  }
+  virtual const char* GetCleanTargetName()         const { return "clean"; }
+
+public:
+  cmGeneratedFileStream* GetBuildFileStream() const
+  { return this->BuildFileStream; }
+
+  cmGeneratedFileStream* GetRulesFileStream() const
+  { return this->RulesFileStream; }
+
+  /**
+   * Add a rule to the generated build system.
+   * Call WriteRule() behind the scene but perform some check before like:
+   * - Do not add twice the same rule.
+   */
+  void AddRule(const std::string& name,
+               const std::string& command,
+               const std::string& description,
+               const std::string& comment = "",
+               const std::string& depfile = "",
+               bool restat = false,
+               bool generator = false);
+
+  bool HasRule(const std::string& name);
+
+  void AddCustomCommandRule();
+
+protected:
+
+  /// Overloaded methods.
+  /// @see cmGlobalGenerator::CheckALLOW_DUPLICATE_CUSTOM_TARGETS()
+  virtual bool CheckALLOW_DUPLICATE_CUSTOM_TARGETS() { return true; }
+
+private:
+  // In order to access the AddDependencyToAll() functions and co.
+  friend class cmLocalNinjaGenerator;
+
+  // In order to access the SeenCustomCommand() function.
+  friend class cmNinjaTargetGenerator;
+  friend class cmNinjaNormalTargetGenerator;
+  friend class cmNinjaUtilityTargetGenerator;
+
+private:
+  void OpenBuildFileStream();
+  void CloseBuildFileStream();
+
+  void OpenRulesFileStream();
+  void CloseRulesFileStream();
+
+  /// Write the common disclaimer text at the top of each build file.
+  void WriteDisclaimer(std::ostream& os);
+
+  void AddDependencyToAll(cmTarget* target);
+
+  void WriteAssumedSourceDependencies(std::ostream& os);
+
+  void AppendTargetOutputs(cmTarget* target, cmNinjaDeps& outputs);
+  void AppendTargetDepends(cmTarget* target, cmNinjaDeps& outputs);
+
+  void AddTargetAlias(const std::string& alias, cmTarget* target);
+  void WriteTargetAliases(std::ostream& os);
+
+  void WriteBuiltinTargets(std::ostream& os);
+  void WriteTargetAll(std::ostream& os);
+  void WriteTargetRebuildManifest(std::ostream& os);
+
+  /// Called when we have seen the given custom command.  Returns true
+  /// if we has seen it before.
+  bool SeenCustomCommand(cmCustomCommand *cc) {
+    return !this->CustomCommands.insert(cc).second;
+  }
+
+  /// Called when we have seen the given custom command output.
+  void SeenCustomCommandOutput(const std::string &output) {
+    this->CustomCommandOutputs.insert(output);
+    // We don't need the assumed dependencies anymore, because we have
+    // an output.
+    this->AssumedSourceDependencies.erase(output);
+  }
+
+  bool HasCustomCommandOutput(const std::string &output) {
+    return this->CustomCommandOutputs.find(output) !=
+           this->CustomCommandOutputs.end();
+  }
+
+  void AddAssumedSourceDependencies(const std::string &source,
+                                    const cmNinjaDeps &deps) {
+    std::set<std::string> &ASD = this->AssumedSourceDependencies[source];
+    // Because we may see the same source file multiple times (same source
+    // specified in multiple targets), compute the union of any assumed
+    // dependencies.
+    ASD.insert(deps.begin(), deps.end());
+  }
+
+private:
+  /// The file containing the build statement. (the relation ship of the
+  /// compilation DAG).
+  cmGeneratedFileStream* BuildFileStream;
+  /// The file containing the rule statements. (The action attached to each
+  /// edge of the compilation DAG).
+  cmGeneratedFileStream* RulesFileStream;
+
+  /// The type used to store the set of rules added to the generated build
+  /// system.
+  typedef std::set<std::string> RulesSetType;
+
+  /// The set of rules added to the generated build system.
+  RulesSetType Rules;
+
+  /// The set of dependencies to add to the "all" target.
+  cmNinjaDeps AllDependencies;
+
+  /// The set of custom commands we have seen.
+  std::set<cmCustomCommand *> CustomCommands;
+
+  /// The set of custom command outputs we have seen.
+  std::set<std::string> CustomCommandOutputs;
+
+  /// The mapping from source file to assumed dependencies.
+  std::map<std::string, std::set<std::string> > AssumedSourceDependencies;
+
+  typedef std::map<std::string, cmTarget*> TargetAliasMap;
+  TargetAliasMap TargetAliases;
+};
+
+#endif // ! cmGlobalNinjaGenerator_h