Re: [PATCH libnetfilter_log v3] build: doc: `make` generates requested documentation

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On 2021-10-06, at 15:26:27 +1100, Duncan Roe wrote:
> Generate man pages, HTML, neither or both according to ./configure.
> Based on the work done for libnetfilter_queue
>
> Signed-off-by: Duncan Roe <duncan_roe@xxxxxxxxxxxxxxx>

A couple of minor comments below, but otherwise:

Tested-by: Jeremy Sowden <jeremy@xxxxxxxxxx>

> ---
> v2: remove --without-doxygen since -disable-man-pages does that
> v3: - update .gitignore for clean `git status` after in-tree build
>     - adjust configure.ac indentation for better readability
>     - adjust configure.ac for all lines to fit in 80cc
>  .gitignore                               |  7 ++--
>  Makefile.am                              |  2 +-
>  autogen.sh                               |  8 +++++
>  configure.ac                             | 45 +++++++++++++++++++++++-
>  doxygen/Makefile.am                      | 39 ++++++++++++++++++++
>  doxygen.cfg.in => doxygen/doxygen.cfg.in |  9 ++---
>  6 files changed, 102 insertions(+), 8 deletions(-)
>  create mode 100644 doxygen/Makefile.am
>  rename doxygen.cfg.in => doxygen/doxygen.cfg.in (76%)
>
> diff --git a/.gitignore b/.gitignore
> index 5eaabe3..bb5e9d8 100644
> --- a/.gitignore
> +++ b/.gitignore
> @@ -13,6 +13,9 @@ Makefile.in
>  /configure
>  /libtool
>
> -/doxygen/
> -/doxygen.cfg

I'd leave the initial /'s here:

> +doxygen/doxygen.cfg
> +doxygen/build_man.sh
> +doxygen/doxyfile.stamp
> +doxygen/man/
> +doxygen/html/
>  /*.pc
> diff --git a/Makefile.am b/Makefile.am
> index 2a9cdd8..6662d7b 100644
> --- a/Makefile.am
> +++ b/Makefile.am
> @@ -1,4 +1,4 @@
> -SUBDIRS	= include src utils
> +SUBDIRS	= include src utils doxygen
>
>  ACLOCAL_AMFLAGS = -I m4
>
> diff --git a/autogen.sh b/autogen.sh
> index 5e1344a..b47c529 100755
> --- a/autogen.sh
> +++ b/autogen.sh
> @@ -1,4 +1,12 @@
>  #!/bin/sh -e
>
> +# Allow to override build_man.sh url for local testing
> +# E.g. export NFQ_URL=file:///usr/src/libnetfilter_queue
> +NFQ_URL=${NFQ_URL:-https://git.netfilter.org/libnetfilter_queue/plain}

You may as well download build_man.sh straight to doxygen/:

  BUILD_MAN=doxygen/build_man.sh

  curl $NFQ_URL/$BUILD_MAN -o$BUILD_MAN
  chmod a+x $BUILD_MAN

> +curl $NFQ_URL/doxygen/build_man.sh -O
> +chmod a+x build_man.sh
> +mv build_man.sh doxygen/
> +
>  autoreconf -fi
>  rm -Rf autom4te.cache
> diff --git a/configure.ac b/configure.ac
> index c914e00..134178d 100644
> --- a/configure.ac
> +++ b/configure.ac
> @@ -12,6 +12,23 @@ m4_ifdef([AM_PROG_AR], [AM_PROG_AR])
>  dnl kernel style compile messages
>  m4_ifdef([AM_SILENT_RULES], [AM_SILENT_RULES([yes])])
>
> +AC_ARG_ENABLE([html-doc],
> +	      AS_HELP_STRING([--enable-html-doc], [Enable html documentation]),
> +	      [], [enable_html_doc=no])
> +AM_CONDITIONAL([BUILD_HTML], [test "$enable_html_doc" = yes])
> +AS_IF([test "$enable_html_doc" = yes],
> +      [AC_SUBST(GEN_HTML, YES)],
> +      [AC_SUBST(GEN_HTML, NO)])
> +
> +AC_ARG_ENABLE([man-pages],
> +	      AS_HELP_STRING([--disable-man-pages],
> +			     [Disable man page documentation]),
> +	      [], [enable_man_pages=yes])
> +AM_CONDITIONAL([BUILD_MAN], [test "$enable_man_pages" = yes])
> +AS_IF([test "$enable_man_pages" = yes],
> +      [AC_SUBST(GEN_MAN, YES)],
> +      [AC_SUBST(GEN_MAN, NO)])
> +
>  AC_PROG_CC
>  AM_PROG_CC_C_O
>  AC_DISABLE_STATIC
> @@ -35,8 +52,34 @@ PKG_CHECK_MODULES([LIBNETFILTER_CONNTRACK], [libnetfilter_conntrack >= 1.0.2],
>  		  [HAVE_LNFCT=1], [HAVE_LNFCT=0])
>  AM_CONDITIONAL([BUILD_NFCT], [test "$HAVE_LNFCT" -eq 1])
>
> +AS_IF([test "$enable_man_pages" = no -a "$enable_html_doc" = no],
> +      [with_doxygen=no], [with_doxygen=yes])
> +
> +AS_IF([test "x$with_doxygen" != xno], [
> +	AC_CHECK_PROGS([DOXYGEN], [doxygen], [""])
> +	AC_CHECK_PROGS([DOT], [dot], [""])
> +	AS_IF([test "x$DOT" != "x"],
> +	      [AC_SUBST(HAVE_DOT, YES)],
> +	      [AC_SUBST(HAVE_DOT, NO)])
> +])
> +
> +AM_CONDITIONAL([HAVE_DOXYGEN], [test -n "$DOXYGEN"])
> +AS_IF([test "x$DOXYGEN" = x], [
> +	AS_IF([test "x$with_doxygen" != xno], [
> +		dnl Only run doxygen Makefile if doxygen installed
> +		AC_MSG_WARN([Doxygen not found - not building documentation])
> +		enable_html_doc=no
> +		enable_man_pages=no
> +	])
> +])
> +
>  dnl Output the makefile
>  AC_CONFIG_FILES([Makefile src/Makefile include/Makefile
>  	include/libnetfilter_log/Makefile utils/Makefile libnetfilter_log.pc
> -	doxygen.cfg])
> +	doxygen/Makefile doxygen/doxygen.cfg])
>  AC_OUTPUT
> +
> +echo "
> +libnetfilter_log configuration:
> +man pages:                    ${enable_man_pages}
> +html docs:                    ${enable_html_doc}"
> diff --git a/doxygen/Makefile.am b/doxygen/Makefile.am
> new file mode 100644
> index 0000000..582db4e
> --- /dev/null
> +++ b/doxygen/Makefile.am
> @@ -0,0 +1,39 @@
> +if HAVE_DOXYGEN
> +
> +doc_srcs = $(top_srcdir)/src/libnetfilter_log.c\
> +	   $(top_srcdir)/src/nlmsg.c\
> +	   $(top_srcdir)/src/libipulog_compat.c
> +
> +doxyfile.stamp: $(doc_srcs) Makefile
> +	rm -rf html man
> +	doxygen doxygen.cfg >/dev/null
> +
> +if BUILD_MAN
> +	$(abs_top_srcdir)/doxygen/build_man.sh
> +endif
> +
> +	touch doxyfile.stamp
> +
> +CLEANFILES = doxyfile.stamp
> +
> +all-local: doxyfile.stamp
> +clean-local:
> +	rm -rf man html
> +install-data-local:
> +if BUILD_MAN
> +	mkdir -p $(DESTDIR)$(mandir)/man3
> +	cp --no-dereference --preserve=links,mode,timestamps man/man3/*.3\
> +	  $(DESTDIR)$(mandir)/man3/
> +endif
> +if BUILD_HTML
> +	mkdir  -p $(DESTDIR)$(htmldir)
> +	cp  --no-dereference --preserve=links,mode,timestamps html/*\
> +		$(DESTDIR)$(htmldir)
> +endif
> +
> +# make distcheck needs uninstall-local
> +uninstall-local:
> +	rm -rf $(DESTDIR)$(mandir) man html doxyfile.stamp $(DESTDIR)$(htmldir)
> +endif
> +
> +EXTRA_DIST = build_man.sh
> diff --git a/doxygen.cfg.in b/doxygen/doxygen.cfg.in
> similarity index 76%
> rename from doxygen.cfg.in
> rename to doxygen/doxygen.cfg.in
> index dc2fddb..b6c27dc 100644
> --- a/doxygen.cfg.in
> +++ b/doxygen/doxygen.cfg.in
> @@ -1,12 +1,11 @@
>  # Difference with default Doxyfile 1.8.20
>  PROJECT_NAME           = @PACKAGE@
>  PROJECT_NUMBER         = @VERSION@
> -OUTPUT_DIRECTORY       = doxygen
>  ABBREVIATE_BRIEF       =
>  FULL_PATH_NAMES        = NO
>  TAB_SIZE               = 8
>  OPTIMIZE_OUTPUT_FOR_C  = YES
> -INPUT                  = .
> +INPUT                  = @abs_top_srcdir@/src
>  FILE_PATTERNS          = *.c
>  RECURSIVE              = YES
>  EXCLUDE_SYMBOLS        = nflog_g_handle \
> @@ -18,7 +17,9 @@ SOURCE_BROWSER         = YES
>  ALPHABETICAL_INDEX     = NO
>  GENERATE_LATEX         = NO
>  LATEX_CMD_NAME         = latex
> -GENERATE_MAN           = YES
> -HAVE_DOT               = YES
> +GENERATE_MAN           = @GEN_MAN@
> +GENERATE_HTML          = @GEN_HTML@
> +MAN_LINKS              = YES
> +HAVE_DOT               = @HAVE_DOT@
>  DOT_TRANSPARENT        = YES
>  SEARCHENGINE           = NO
> --
> 2.17.5
>
>

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