Documentation: move dblatex arguments into variable

Our dblatex invocation uses several style components from the AsciiDoc
distribution, but those components are not available when building with
Asciidoctor.  Move the command line arguments into a variable so it can
be overridden by the user or makefile configuration options.

Signed-off-by: brian m. carlson <sandals@crustytoothpaste.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

diff --git a/Documentation/Makefile b/Documentation/Makefile
index eecc27aba29af3c7a258ef6e17aadb912db5512f..3e317b8c1c2f38a1d20cdc49d54cdbabe809e5be 100644 (file)
--- a/Documentation/Makefile
+++ b/Documentation/Makefile
@@ -120,6 +120,7 @@ INSTALL_INFO = install-info
 DOCBOOK2X_TEXI = docbook2x-texi
 DBLATEX = dblatex
 ASCIIDOC_DBLATEX_DIR = /etc/asciidoc/dblatex
+DBLATEX_COMMON = -p $(ASCIIDOC_DBLATEX_DIR)/asciidoc-dblatex.xsl -s $(ASCIIDOC_DBLATEX_DIR)/asciidoc-dblatex.sty
 ifndef PERL_PATH
        PERL_PATH = /usr/bin/perl
 endif
@@ -368,7 +369,7 @@ user-manual.texi: user-manual.xml
 
 user-manual.pdf: user-manual.xml
        $(QUIET_DBLATEX)$(RM) $@+ $@ && \
-       $(DBLATEX) -o $@+ -p $(ASCIIDOC_DBLATEX_DIR)/asciidoc-dblatex.xsl -s $(ASCIIDOC_DBLATEX_DIR)/asciidoc-dblatex.sty $< && \
+       $(DBLATEX) -o $@+ $(DBLATEX_COMMON) $< && \
        mv $@+ $@
 
 gitman.texi: $(MAN_XML) cat-texi.perl texi.xsl