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[PATCH v6 5/9] docs: add checks to configure for sphinx and doxygen

Add checks in the configure files to see if the system
is capable of generate the sphinx html docs using
doxygen and sphinx-breathe tools.

Signed-off-by: Luca Fancellu <luca.fancellu@xxxxxxx>
---
 config/Docs.mk.in |   2 +
 docs/configure    | 258 ++++++++++++++++++++++++++++++++++++++++++++++
 docs/configure.ac |  15 +++
 3 files changed, 275 insertions(+)

diff --git a/config/Docs.mk.in b/config/Docs.mk.in
index e76e5cd5ff..dfd4a02838 100644
--- a/config/Docs.mk.in
+++ b/config/Docs.mk.in
@@ -7,3 +7,5 @@ POD2HTML            := @POD2HTML@
 POD2TEXT            := @POD2TEXT@
 PANDOC              := @PANDOC@
 PERL                := @PERL@
+SPHINXBUILD         := @SPHINXBUILD@
+DOXYGEN             := @DOXYGEN@
diff --git a/docs/configure b/docs/configure
index 569bd4c2ff..0ebf046a79 100755
--- a/docs/configure
+++ b/docs/configure
@@ -588,6 +588,8 @@ ac_unique_file="misc/xen-command-line.pandoc"
 ac_subst_vars='LTLIBOBJS
 LIBOBJS
 PERL
+DOXYGEN
+SPHINXBUILD
 PANDOC
 POD2TEXT
 POD2HTML
@@ -673,6 +675,7 @@ POD2MAN
 POD2HTML
 POD2TEXT
 PANDOC
+DOXYGEN
 PERL'
 
 
@@ -1318,6 +1321,7 @@ Some influential environment variables:
   POD2HTML    Path to pod2html tool
   POD2TEXT    Path to pod2text tool
   PANDOC      Path to pandoc tool
+  DOXYGEN     Path to doxygen tool
   PERL        Path to Perl parser
 
 Use these variables to override the choices made by `configure' or to help
@@ -1800,6 +1804,7 @@ ac_configure="$SHELL $ac_aux_dir/configure"  # Please 
don't use this var.
 
 
 
+
 case "$host_os" in
 *freebsd*) XENSTORED_KVA=/dev/xen/xenstored ;;
 *) XENSTORED_KVA=/proc/xen/xsd_kva ;;
@@ -1812,6 +1817,53 @@ case "$host_os" in
 esac
 
 
+# ===========================================================================
+#     https://www.gnu.org/software/autoconf-archive/ax_python_module.html
+# ===========================================================================
+#
+# SYNOPSIS
+#
+#   AX_PYTHON_MODULE(modname[, fatal, python])
+#
+# DESCRIPTION
+#
+#   Checks for Python module.
+#
+#   If fatal is non-empty then absence of a module will trigger an error.
+#   The third parameter can either be "python" for Python 2 or "python3" for
+#   Python 3; defaults to Python 3.
+#
+# LICENSE
+#
+#   Copyright (c) 2008 Andrew Collier
+#
+#   Copying and distribution of this file, with or without modification, are
+#   permitted in any medium without royalty provided the copyright notice
+#   and this notice are preserved. This file is offered as-is, without any
+#   warranty.
+
+#serial 9
+
+# This is what autoupdate's m4 run will expand.  It fires
+# the warning (with _au_warn_XXX), outputs it into the
+# updated configure.ac (with AC_DIAGNOSE), and then outputs
+# the replacement expansion.
+
+
+# This is an auxiliary macro that is also run when
+# autoupdate runs m4.  It simply calls m4_warning, but
+# we need a wrapper so that each warning is emitted only
+# once.  We break the quoting in m4_warning's argument in
+# order to expand this macro's arguments, not AU_DEFUN's.
+
+
+# Finally, this is the expansion that is picked up by
+# autoconf.  It tells the user to run autoupdate, and
+# then outputs the replacement expansion.  We do not care
+# about autoupdate's warning because that contains
+# information on what to do *after* running autoupdate.
+
+
 
 
 test "x$prefix" = "xNONE" && prefix=$ac_default_prefix
@@ -2232,6 +2284,212 @@ $as_echo "$as_me: WARNING: pandoc is not available so 
some documentation won't b
 fi
 
 
+# If sphinx is installed, make sure to have also the dependencies to build
+# Sphinx documentation.
+for ac_prog in sphinx-build
+do
+  # Extract the first word of "$ac_prog", so it can be a program name with 
args.
+set dummy $ac_prog; ac_word=$2
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+$as_echo_n "checking for $ac_word... " >&6; }
+if ${ac_cv_prog_SPHINXBUILD+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  if test -n "$SPHINXBUILD"; then
+  ac_cv_prog_SPHINXBUILD="$SPHINXBUILD" # Let the user override the test.
+else
+as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+    for ac_exec_ext in '' $ac_executable_extensions; do
+  if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
+    ac_cv_prog_SPHINXBUILD="$ac_prog"
+    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" 
>&5
+    break 2
+  fi
+done
+  done
+IFS=$as_save_IFS
+
+fi
+fi
+SPHINXBUILD=$ac_cv_prog_SPHINXBUILD
+if test -n "$SPHINXBUILD"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $SPHINXBUILD" >&5
+$as_echo "$SPHINXBUILD" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+  test -n "$SPHINXBUILD" && break
+done
+test -n "$SPHINXBUILD" || SPHINXBUILD="no"
+
+    if test "x$SPHINXBUILD" = xno; then :
+  { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: sphinx-build is not 
available so sphinx documentation \
+won't be built" >&5
+$as_echo "$as_me: WARNING: sphinx-build is not available so sphinx 
documentation \
+won't be built" >&2;}
+else
+
+            # Extract the first word of "sphinx-build", so it can be a program 
name with args.
+set dummy sphinx-build; ac_word=$2
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+$as_echo_n "checking for $ac_word... " >&6; }
+if ${ac_cv_path_SPHINXBUILD+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  case $SPHINXBUILD in
+  [\\/]* | ?:[\\/]*)
+  ac_cv_path_SPHINXBUILD="$SPHINXBUILD" # Let the user override the test with 
a path.
+  ;;
+  *)
+  as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+    for ac_exec_ext in '' $ac_executable_extensions; do
+  if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
+    ac_cv_path_SPHINXBUILD="$as_dir/$ac_word$ac_exec_ext"
+    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" 
>&5
+    break 2
+  fi
+done
+  done
+IFS=$as_save_IFS
+
+  ;;
+esac
+fi
+SPHINXBUILD=$ac_cv_path_SPHINXBUILD
+if test -n "$SPHINXBUILD"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $SPHINXBUILD" >&5
+$as_echo "$SPHINXBUILD" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+
+
+    # Extract the first word of "doxygen", so it can be a program name with 
args.
+set dummy doxygen; ac_word=$2
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+$as_echo_n "checking for $ac_word... " >&6; }
+if ${ac_cv_path_DOXYGEN+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  case $DOXYGEN in
+  [\\/]* | ?:[\\/]*)
+  ac_cv_path_DOXYGEN="$DOXYGEN" # Let the user override the test with a path.
+  ;;
+  *)
+  as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+    for ac_exec_ext in '' $ac_executable_extensions; do
+  if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
+    ac_cv_path_DOXYGEN="$as_dir/$ac_word$ac_exec_ext"
+    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" 
>&5
+    break 2
+  fi
+done
+  done
+IFS=$as_save_IFS
+
+  ;;
+esac
+fi
+DOXYGEN=$ac_cv_path_DOXYGEN
+if test -n "$DOXYGEN"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $DOXYGEN" >&5
+$as_echo "$DOXYGEN" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+    if ! test -x "$ac_cv_path_DOXYGEN"; then :
+
+        as_fn_error $? "doxygen is needed" "$LINENO" 5
+
+fi
+
+
+    if test -z $PYTHON;
+    then
+        if test -z "";
+        then
+            PYTHON="python3"
+        else
+            PYTHON=""
+        fi
+    fi
+    PYTHON_NAME=`basename $PYTHON`
+    { $as_echo "$as_me:${as_lineno-$LINENO}: checking $PYTHON_NAME module: 
breathe" >&5
+$as_echo_n "checking $PYTHON_NAME module: breathe... " >&6; }
+    $PYTHON -c "import breathe" 2>/dev/null
+    if test $? -eq 0;
+    then
+        { $as_echo "$as_me:${as_lineno-$LINENO}: result: yes" >&5
+$as_echo "yes" >&6; }
+        eval HAVE_PYMOD_BREATHE=yes
+    else
+        { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+        eval HAVE_PYMOD_BREATHE=no
+        #
+        if test -n "yes"
+        then
+            as_fn_error $? "failed to find required module breathe" "$LINENO" 5
+            exit 1
+        fi
+    fi
+
+
+    if test -z $PYTHON;
+    then
+        if test -z "";
+        then
+            PYTHON="python3"
+        else
+            PYTHON=""
+        fi
+    fi
+    PYTHON_NAME=`basename $PYTHON`
+    { $as_echo "$as_me:${as_lineno-$LINENO}: checking $PYTHON_NAME module: 
sphinx_rtd_theme" >&5
+$as_echo_n "checking $PYTHON_NAME module: sphinx_rtd_theme... " >&6; }
+    $PYTHON -c "import sphinx_rtd_theme" 2>/dev/null
+    if test $? -eq 0;
+    then
+        { $as_echo "$as_me:${as_lineno-$LINENO}: result: yes" >&5
+$as_echo "yes" >&6; }
+        eval HAVE_PYMOD_SPHINX_RTD_THEME=yes
+    else
+        { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+        eval HAVE_PYMOD_SPHINX_RTD_THEME=no
+        #
+        if test -n "yes"
+        then
+            as_fn_error $? "failed to find required module sphinx_rtd_theme" 
"$LINENO" 5
+            exit 1
+        fi
+    fi
+
+
+
+fi
+
 
 # Extract the first word of "perl", so it can be a program name with args.
 set dummy perl; ac_word=$2
diff --git a/docs/configure.ac b/docs/configure.ac
index c2e5edd3b3..a2ff55f30a 100644
--- a/docs/configure.ac
+++ b/docs/configure.ac
@@ -20,6 +20,7 @@ m4_include([../m4/docs_tool.m4])
 m4_include([../m4/path_or_fail.m4])
 m4_include([../m4/features.m4])
 m4_include([../m4/paths.m4])
+m4_include([../m4/ax_python_module.m4])
 
 AX_XEN_EXPAND_CONFIG()
 
@@ -29,6 +30,20 @@ AX_DOCS_TOOL_PROG([POD2HTML], [pod2html])
 AX_DOCS_TOOL_PROG([POD2TEXT], [pod2text])
 AX_DOCS_TOOL_PROG([PANDOC], [pandoc])
 
+# If sphinx is installed, make sure to have also the dependencies to build
+# Sphinx documentation.
+AC_CHECK_PROGS([SPHINXBUILD], [sphinx-build], [no])
+    AS_IF([test "x$SPHINXBUILD" = xno],
+        [AC_MSG_WARN(sphinx-build is not available so sphinx documentation \
+won't be built)],
+        [
+            AC_PATH_PROG([SPHINXBUILD], [sphinx-build])
+            AX_DOCS_TOOL_REQ_PROG([DOXYGEN], [doxygen])
+            AX_PYTHON_MODULE([breathe],[yes])
+            AX_PYTHON_MODULE([sphinx_rtd_theme], [yes])
+        ]
+    )
+
 AC_ARG_VAR([PERL], [Path to Perl parser])
 AX_PATH_PROG_OR_FAIL([PERL], [perl])
 
-- 
2.17.1

 

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