Merge topic 'release-notes'

ccc87047 Help: Add documents to collect notes between releases
70309e70 Help: Add documents for release notes
34ea1f15 Utilities/Sphinx: Add option to build 'text' format

Help/index.rst

@@ -39,6 +39,16 @@ Reference Manuals
    /manual/cmake-toolchains.7
    /manual/cmake-variables.7
 
+.. only:: html or text
+
+ Release Notes
+ #############
+
+ .. toctree::
+    :maxdepth: 1
+
+    /release/index
+
 .. only:: html
 
  Index and Search

Help/release/dev.txt

@@ -0,0 +1,16 @@
+..
+  This file should be included by the adjacent "index.rst"
+  in development versions but not in release versions.
+
+Changes Since Release
+=====================
+
+The following noteworthy changes have been made in this development
+version since the preceding release but have not yet been consolidated
+into notes for a specific release version:
+
+.. toctree::
+   :maxdepth: 1
+   :glob:
+
+   dev/*

Help/release/dev/0-sample-topic.rst

@@ -0,0 +1,7 @@
+0-sample-topic
+--------------
+
+* This is a sample release note for the change in a topic.
+  Developers should add similar notes for each topic branch
+  making a noteworthy change.  Each document should be named
+  and titled to match the topic name to avoid merge conflicts.

Help/release/index.rst

@@ -0,0 +1,14 @@
+CMake Release Notes
+*******************
+
+..
+  This file should include the adjacent "dev.txt" file
+  in development versions but not in release versions.
+
+.. include:: dev.txt
+
+Releases
+========
+
+.. toctree::
+   :maxdepth: 1

Utilities/Sphinx/CMakeLists.txt

@@ -24,12 +24,15 @@ project(CMakeHelp NONE)
 
 option(SPHINX_MAN "Build man pages with Sphinx" OFF)
 option(SPHINX_HTML "Build html help with Sphinx" OFF)
+option(SPHINX_TEXT "Build text help with Sphinx (not installed)" OFF)
 find_program(SPHINX_EXECUTABLE
   NAMES sphinx-build
   DOC "Sphinx Documentation Builder (sphinx-doc.org)"
   )
 
-if(NOT SPHINX_MAN AND NOT SPHINX_HTML)
+mark_as_advanced(SPHINX_TEXT)
+
+if(NOT SPHINX_MAN AND NOT SPHINX_HTML AND NOT SPHINX_TEXT)
   return()
 elseif(NOT SPHINX_EXECUTABLE)
   message(FATAL_ERROR "SPHINX_EXECUTABLE (sphinx-build) is not found!")
@@ -57,6 +60,9 @@ endif()
 if(SPHINX_MAN)
   list(APPEND doc_formats man)
 endif()
+if(SPHINX_TEXT)
+  list(APPEND doc_formats text)
+endif()
 
 set(doc_format_outputs "")
 set(doc_format_last "")