From 07303a0a4daa83a0555ac4abad7a5d65584307ad Mon Sep 17 00:00:00 2001
From: Maxim Cournoyer <maxim.cournoyer@gmail.com>
Date: Thu, 17 Sep 2020 13:28:19 -0400
Subject: [PATCH] build: Build and install the info manual.

Take advantage of the Sphinx texinfo backend to generate a QEMU info
manual.  The texinfo format allows for more structure and info readers
provide more advanced navigation capabilities compared to manpages
readers.

* configure (infodir): Add the --infodir option, which allows
configuring the directory under which the info manuals are installed.
* docs/index.rst: Include the top level documents to prevent
warnings (treated as errors by sphinx-build).
* Makefile (sphinxdocs-info, $(MANUAL_BUILDDIR)/QEMU.texi)): New targets.
(info): Depend on sphinxdocs-info.
(install-doc): Install the info manual.
---
 Makefile       | 13 +++++++++++--
 configure      |  7 +++++++
 docs/index.rst |  2 ++
 3 files changed, 20 insertions(+), 2 deletions(-)

diff --git a/Makefile b/Makefile
index 13dd708c..da78612d 100644
--- a/Makefile
+++ b/Makefile
@@ -864,12 +864,14 @@ endef
 # Note that we deliberately do not install the "devel" manual: it is
 # for QEMU developers, and not interesting to our users.
 .PHONY: install-sphinxdocs
-install-sphinxdocs: sphinxdocs
+install-sphinxdocs: sphinxdocs sphinxdocs-info
 	$(call install-manual,interop)
 	$(call install-manual,specs)
 	$(call install-manual,system)
 	$(call install-manual,tools)
 	$(call install-manual,user)
+	$(INSTALL_DIR) "$(DESTDIR)$(infodir)"
+	$(INSTALL_DATA) $(MANUAL_BUILDDIR)/QEMU.info "$(DESTDIR)$(infodir)"
 
 install-doc: $(DOCS) install-sphinxdocs
 	$(INSTALL_DIR) "$(DESTDIR)$(qemu_docdir)"
@@ -1067,6 +1069,13 @@ sphinxdocs: $(MANUAL_BUILDDIR)/devel/index.html \
             $(MANUAL_BUILDDIR)/tools/index.html \
             $(MANUAL_BUILDDIR)/user/index.html
 
+# Build the complete info manual.
+.PHONE: sphinxdocs-info
+sphinxdocs-info: $(MANUAL_BUILDDIR)/QEMU.info
+
+$(MANUAL_BUILDDIR)/QEMU.texi: $(call manual-deps,*) $(wildcard $(SRC_PATH)/docs/*.rst)
+	$(call build-manual,,texinfo)
+
 # Canned command to build a single manual
 # Arguments: $1 = manual name, $2 = Sphinx builder ('html' or 'man')
 # Note the use of different doctree for each (manual, builder) tuple;
@@ -1126,7 +1135,7 @@ docs/interop/qemu-ga-qapi.texi: qga/qapi-generated/qga-qapi-doc.texi
 	@cp -p $< $@
 
 html: docs/interop/qemu-qmp-ref.html docs/interop/qemu-ga-ref.html sphinxdocs
-info: docs/interop/qemu-qmp-ref.info docs/interop/qemu-ga-ref.info
+info: docs/interop/qemu-qmp-ref.info docs/interop/qemu-ga-ref.info sphinxdocs-info
 pdf: docs/interop/qemu-qmp-ref.pdf docs/interop/qemu-ga-ref.pdf
 txt: docs/interop/qemu-qmp-ref.txt docs/interop/qemu-ga-ref.txt
 
diff --git a/configure b/configure
index 2acc4d14..3691bd2e 100755
--- a/configure
+++ b/configure
@@ -415,6 +415,7 @@ LDFLAGS_SHARED="-shared"
 modules="no"
 module_upgrades="no"
 prefix="/usr/local"
+infodir="\${prefix}/share/info"
 mandir="\${prefix}/share/man"
 datadir="\${prefix}/share"
 firmwarepath="\${prefix}/share/qemu-firmware"
@@ -987,6 +988,7 @@ if test "$mingw32" = "yes" ; then
     LIBS="-liberty $LIBS"
   fi
   prefix="c:/Program Files/QEMU"
+  infodir="\${prefix}"
   mandir="\${prefix}"
   datadir="\${prefix}"
   qemu_docdir="\${prefix}"
@@ -1087,6 +1089,8 @@ for opt do
     static="yes"
     QEMU_PKG_CONFIG_FLAGS="--static $QEMU_PKG_CONFIG_FLAGS"
   ;;
+  --infodir=*) infodir="$optarg"
+  ;;
   --mandir=*) mandir="$optarg"
   ;;
   --bindir=*) bindir="$optarg"
@@ -1780,6 +1784,7 @@ Advanced options (experts only):
   --smbd=SMBD              use specified smbd [$smbd]
   --with-git=GIT           use specified git [$git]
   --static                 enable static build [$static]
+  --infodir=PATH           install info manual in PATH
   --mandir=PATH            install man pages in PATH
   --datadir=PATH           install firmware in PATH$confsuffix
   --docdir=PATH            install documentation in PATH$confsuffix
@@ -6836,6 +6841,7 @@ echo "include directory $(eval echo $includedir)"
 echo "config directory  $(eval echo $sysconfdir)"
 if test "$mingw32" = "no" ; then
 echo "local state directory   $(eval echo $local_statedir)"
+echo "Info manual directory   $(eval echo $infodir)"
 echo "Manual directory  $(eval echo $mandir)"
 echo "ELF interp prefix $interp_prefix"
 else
@@ -7059,6 +7065,7 @@ echo "bindir=$bindir" >> $config_host_mak
 echo "libdir=$libdir" >> $config_host_mak
 echo "libexecdir=$libexecdir" >> $config_host_mak
 echo "includedir=$includedir" >> $config_host_mak
+echo "infodir=$infodir" >> $config_host_mak
 echo "mandir=$mandir" >> $config_host_mak
 echo "sysconfdir=$sysconfdir" >> $config_host_mak
 echo "qemu_confdir=$qemu_confdir" >> $config_host_mak
diff --git a/docs/index.rst b/docs/index.rst
index 763e3d04..4f155b51 100644
--- a/docs/index.rst
+++ b/docs/index.rst
@@ -9,6 +9,7 @@ Welcome to QEMU's documentation!
 .. toctree::
    :maxdepth: 2
    :caption: Contents:
+   :glob:
 
    system/index
    user/index
@@ -16,3 +17,4 @@ Welcome to QEMU's documentation!
    interop/index
    specs/index
    devel/index
+   *
-- 
2.28.0