Re: Help requested for Automake.

[Mathieu Lirzin]

Hello Gavin,

Gavin Smith <address@hidden> writes:

> On 4 March 2017 at 16:06, Gavin Smith <address@hidden> wrote:
>> I thought of putting something inside @bye, but the problem is that
>> penalties and glue are discarded when the page is empty, and anything
>> else risks outputting a completely empty page at the end even when
>> non-empty pages have been output already.
>>
>> If anyone sees a problem with the idea of starting out by always
>> outputting an empty @vbox on the page, please say so.
>
> The problem with using a @vbox is that this leads to @topskip glue
> being added before it as well as @parskip glue before whatever follows
> it (whatever comes first in the user's document).
>
> Using a @mark didn't play well with the output routine in texinfo.tex,
> but @special does work. An page with no boxes can be output if it has
> a @special on it. I've committed a change that adds a @special to set
> the paper size of the document (can be changed with @afourpaper etc.);
> this should fix the problem.

Thanks, I have updated the "texinfo.tex" distributed in Automake
accordingly.

What do you think of adding the following test in the Texinfo test
suite?

Index: Makefile.am
===================================================================
--- Makefile.am (révision 7678)
+++ Makefile.am (copie de travail)
@@ -64,4 +64,11 @@
 
 DISTCLEANFILES = txixml2texi
 
-TESTS=tests/texi2dvi_helpversion.sh
+# Use 'texinfo.tex' from "$(top_srcdir)/doc"
+AM_TESTS_ENVIRONMENT = \
+  TEXINPUTS="$(top_srcdir)/doc$(PATH_SEPARATOR)$$TEXINPUTS"; \
+  export TEXINPUTS;
+
+TESTS= \
+  tests/texi2dvi_helpversion.sh \
+  tests/texi2dvi_empty_text.sh
Index: tests/texi2dvi_empty_text.sh
===================================================================
--- tests/texi2dvi_empty_text.sh        (nonexistent)
+++ tests/texi2dvi_empty_text.sh        (copie de travail)
@@ -0,0 +1,25 @@
+#!/bin/sh
+
+# Ensure that texi2dvi handles a file without text.
+
+set -x
+
+filename="foo-$$"
+texi2dvi=$srcdir/texi2dvi
+
+trap "rm -f $filename.texi $filename.dvi $filename.log" EXIT
+
+cat > "$filename.texi" <<'EOF'
+\input texinfo
address@hidden foo.info
address@hidden foo manual
address@hidden
+EOF
+
+$texi2dvi -o "$filename.dvi" "$filename.texi"
+if test $? -ne 0; then
+  cat "$filename.log"
+  exit 1
+fi
+
+:

That would help detecting if any future change will re-introduce that
regression.

-- 
Mathieu Lirzin
GPG: F2A3 8D7E EB2B 6640 5761  070D 0ADE E100 9460 4D37