Re: [PATCH] maint: mention when HACKING is rebuilt during make

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On 12/06/2012 04:44 PM, Eric Blake wrote:
> I noticed that on Fedora 18, xlstproc decides to regenerate
> HACKING with additional whitespace.  I haven't figured out why
> that is happening (although fixing it would probably be a task
> for xlstproc), but in the process of investigating, I noticed
> that 'make HACKING' was completely silent, for no good reason.
> 
> * Makefile.am (gen-ChangeLog, gen-AUTHORS, NEWS)
> ($(top_srcdir)/HACKING): Mention which files we are generating.
> ---
> 
> The F18 xsltproc is from libxslt-1.1.27; it is generating additional
> newlines in HACKING when compared against libxslt-1.1.26 of RHEL 6.3;
> any hints on making HACKING idempotent in spite of different libxslt
> versions would be appreciated.
> 
>  Makefile.am | 10 +++++-----
>  1 file changed, 5 insertions(+), 5 deletions(-)

I've gone ahead and pushed the Makefile.am changes under the trivial
rule, but help for the extra whitespace in HACKING would be appreciated.

> 
> diff --git a/Makefile.am b/Makefile.am
> index 7b3a335..f8e669a 100644
> --- a/Makefile.am
> +++ b/Makefile.am
> @@ -1,6 +1,6 @@
>  ## Process this file with automake to produce Makefile.in
> 
> -## Copyright (C) 2005-2011 Red Hat, Inc.
> +## Copyright (C) 2005-2012 Red Hat, Inc.
>  ## See COPYING.LIB for the License of this software
> 
>  LCOV = lcov
> @@ -35,7 +35,7 @@ pkgconfigdir = $(libdir)/pkgconfig
>  pkgconfig_DATA = libvirt.pc
> 
>  NEWS: $(top_srcdir)/docs/news.xsl $(top_srcdir)/docs/news.html.in
> -	-@(if [ -x $(XSLTPROC) ] ; then				\
> +	$(AM_V_GEN)(if [ -x $(XSLTPROC) ] ; then		\
>  	  $(XSLTPROC) --nonet $(top_srcdir)/docs/news.xsl	\
>  	     $(top_srcdir)/docs/news.html.in			\
>  	   | perl -0777 -pe 's/\n\n+$$/\n/'			\
> @@ -44,7 +44,7 @@ NEWS: $(top_srcdir)/docs/news.xsl $(top_srcdir)/docs/news.html.in
> 
>  $(top_srcdir)/HACKING: $(top_srcdir)/docs/hacking1.xsl $(top_srcdir)/docs/hacking2.xsl \
>                         $(top_srcdir)/docs/wrapstring.xsl $(top_srcdir)/docs/hacking.html.in
> -	-@(if [ -x $(XSLTPROC) ] ; then \
> +	$(AM_V_GEN)(if [ -x $(XSLTPROC) ] ; then \
>  	   $(XSLTPROC) --nonet $(top_srcdir)/docs/hacking1.xsl $(top_srcdir)/docs/hacking.html.in | \
>  	   $(XSLTPROC) --nonet $(top_srcdir)/docs/hacking2.xsl - \
>  	   | perl -0777 -pe 's/\n\n+$$/\n/' \

Hmm, I noticed that this perl invocation chops all trailing newlines;
should we be tweaking it to squash all redundant newlines??

> @@ -86,7 +86,7 @@ dist-hook: gen-ChangeLog gen-AUTHORS
>  gen_start_date = 2009-07-04
>  .PHONY: gen-ChangeLog
>  gen-ChangeLog:
> -	if test -d .git; then					\
> +	$(AM_V_GEN)if test -d .git; then			\
>  	  $(top_srcdir)/build-aux/gitlog-to-changelog		\
>  	    --since=$(gen_start_date) > $(distdir)/cl-t;	\
>  	  rm -f $(distdir)/ChangeLog;				\
> @@ -95,7 +95,7 @@ gen-ChangeLog:
> 
>  .PHONY: gen-AUTHORS
>  gen-AUTHORS:
> -	if test -d .git; then \
> +	$(AM_V_GEN)if test -d .git; then \
>  	    out="`git log --pretty=format:'%aN <%aE>' | sort -u`" && \
>  	    cat $(srcdir)/AUTHORS.in | perl -p -e "s/#authorslist#/$$out/" > \
>  	      $(distdir)/AUTHORS-tmp && \
> 

-- 
Eric Blake   eblake redhat com    +1-919-301-3266
Libvirt virtualization library http://libvirt.org

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