Teach --help-* options to load documentation from .rst files

Install the Help directory next to Modules to make it available in CMake
distributions.  Use cmRST to read Help .rst documents and print them as
help output.

Add options

 --help-manual-list
 --help-manual

to list available manuals or print one of them.  Implement the options

 --help-commands
 --help-modules
 --help-policies
 --help-properties
 --help-variables

by mapping to the corresponding manual page.  Implement the options

 --help-command-list
 --help-module-list
 --help-policy-list
 --help-property-list
 --help-variable-list

by globbing the available Help .rst documents of the corresponding type
and reading their titles.  Implement the options

 --help-command
 --help-module
 --help-policy
 --help-property
 --help-variable

by globbing the matching Help .rst document(s) and printing them.

1 files changed, 16 insertions, 0 deletions

diff --git a/Source/cmDocumentation.h b/Source/cmDocumentation.h
index fac3748..31c7602 100644
--- a/Source/cmDocumentation.h
+++ b/Source/cmDocumentation.h
@@ -131,7 +131,23 @@ public:
 private:
   void SetForm(Form f, int manSection);
 
+  void GlobHelp(std::vector<std::string>& files, std::string const& pattern);
+  void PrintNames(std::ostream& os, std::string const& pattern);
+  bool PrintFiles(std::ostream& os, std::string const& pattern);
+
   bool PrintVersion(std::ostream& os);
+  bool PrintHelpOneManual(std::ostream& os);
+  bool PrintHelpOneCommand(std::ostream& os);
+  bool PrintHelpOneModule(std::ostream& os);
+  bool PrintHelpOnePolicy(std::ostream& os);
+  bool PrintHelpOneProperty(std::ostream& os);
+  bool PrintHelpOneVariable(std::ostream& os);
+  bool PrintHelpListManuals(std::ostream& os);
+  bool PrintHelpListCommands(std::ostream& os);
+  bool PrintHelpListModules(std::ostream& os);
+  bool PrintHelpListProperties(std::ostream& os);
+  bool PrintHelpListVariables(std::ostream& os);
+  bool PrintHelpListPolicies(std::ostream& os);
   bool PrintDocumentationUsage(std::ostream& os);
 
   const char* GetNameString() const;