[gimp-help] build: add support for building Quickreference pdf's using rsvg-convert

[Jacob Boerema <jboerema src gnome org>]

commit 8cd8e1660c6bbcd2018c0204fc3516e91c9d460c
Author: Jacob Boerema <jgboerema gmail com>
Date:   Tue Feb 22 18:21:52 2022 -0500

    build: add support for building Quickreference pdf's using rsvg-convert
    
    We failed to figure out how to use dblatex to generate pdf's, so we
    decided to use rsvg-convert to convert the svg files to pdf's.
    
    This is a first step. Still to do:
    - Support for installing the pdf's.
    - Autodetect if rsvg-convert is available or not.
    
    (cherry picked from commit deaf6c81efce7144a09fb38c23f18d9046cbda77)

 quickreference/Makefile.am | 22 +++++++++++++++++-----
 1 file changed, 17 insertions(+), 5 deletions(-)
---
diff --git a/quickreference/Makefile.am b/quickreference/Makefile.am
index 6d107237e..0cf4f48dd 100644
--- a/quickreference/Makefile.am
+++ b/quickreference/Makefile.am
@@ -65,6 +65,16 @@ svg/gimp-keys-%.svg: xml/gimp-keys-%.xml stylesheets/keys-svg.xsl
 
 svg: $(foreach lang,$(QUICKREFERENCE_LINGUAS),svg/gimp-keys-$(lang).svg)
 
+SVG2PDF = rsvg-convert
+SVG2PDF_FLAGS = -a -f Pdf
+
+pdf/gimp-keys-%.pdf: svg/gimp-keys-%.svg
+       @$(MKDIR_P) pdf
+       @if test -f pdf/%.pdf; then rm -f pdf/%.pdf; fi
+       @echo "*** Making Quickreference PDF ($*) ..."
+       @$(SVG2PDF) $(SVG2PDF_FLAGS) -o $@ $<
+
+pdf-local: $(foreach lang,$(QUICKREFERENCE_LINGUAS),pdf/gimp-keys-$(lang).pdf)
 docbook/gimp-keys-%.xml: xml/gimp-keys-%.xml stylesheets/keys-docbook.xsl
        $(MKDIR_P) docbook
        $(XSLTPROC) \
@@ -74,13 +84,15 @@ docbook/gimp-keys-%.xml: xml/gimp-keys-%.xml stylesheets/keys-docbook.xsl
 
 docbook: $(foreach lang,$(QUICKREFERENCE_LINGUAS),docbook/gimp-keys-$(lang).xml)
 
-all-local: svg docbook
+all-local: svg pdf-local docbook
 
 clean-local:
-       rm -rf docbook
-       rm -rf svg
-       rm -rf xml
-       rm -f .xml2po.mo
+       @echo "*** Cleaning up ..."
+       @rm -rf docbook
+       @rm -rf pdf
+       @rm -rf svg
+       @rm -rf xml
+       @rm -f .xml2po.mo
 
 .DELETE_ON_ERROR: