Re: seen branch dirty after 'make clean'

[Junio C Hamano <gitster@pobox.com>]

Ramsay Jones <ramsay@ramsayjones.plus.com> writes:

> Just a quick heads up; with current seen branch, if you do a 'make clean'
> before building (as I routinely do), then:
>   $ git describe --dirty
>   v2.46.0-rc1-129-g19a89823f5
>   $ 
>  
> This is because commit dbc2de902e ("asciidoctor: fix `synopsis` rendering",
> 2024-07-20) adds a tracked file (Documentation/docinfo.html) which the clean
> target deletes (via *.html).

Not just "make clean" but Documentation/.gitignore explicitly says
that in this project, we consider HTML files expendable, which is a
sensible stance to take, because they are generated from other
sources and nobody ought to be writing HTML by hand.

Let me squash this (or something like that) in.

Thanks.

 Documentation/Makefile                          | 5 +++++
 Documentation/{docinfo.html => docinfo-html.in} | 0
 2 files changed, 5 insertions(+)

diff --git c/Documentation/Makefile w/Documentation/Makefile
index 78e407e4bd..371d56eb5e 100644
--- c/Documentation/Makefile
+++ w/Documentation/Makefile
@@ -209,6 +209,8 @@ XMLTO_EXTRA += --skip-validation
 XMLTO_EXTRA += -x manpage.xsl
 endif
 
+ASCIIDOC_DEPS += docinfo.html
+
 SHELL_PATH ?= $(SHELL)
 # Shell quote;
 SHELL_PATH_SQ = $(subst ','\'',$(SHELL_PATH))
@@ -337,6 +339,9 @@ clean:
 	$(RM) $(cmds_txt) $(mergetools_txt) *.made
 	$(RM) GIT-ASCIIDOCFLAGS
 
+docinfo.html: docinfo-html.in
+	$(QUIET_GEN)$(RM) $@ && cat $< >$@
+
 $(MAN_HTML): %.html : %.txt $(ASCIIDOC_DEPS)
 	$(QUIET_ASCIIDOC)$(TXT_TO_HTML) -d manpage -o $@ $<
 
diff --git c/Documentation/docinfo.html w/Documentation/docinfo-html.in
similarity index 100%
rename from Documentation/docinfo.html
rename to Documentation/docinfo-html.in