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[Xen-devel] [PATCH] docs: create reproducible html

The Makefile uses wildcard to collect a list of files. The resulting
list of files is in directory order, which is random. As a result the
generated html files will differ when build on different hosts.

Use the built-in sort function to get a stable list of files.

Signed-off-by: Olaf Hering <olaf@xxxxxxxxx>
Cc: Ian Jackson <ian.jackson@xxxxxxxxxxxxx>
Cc: Stefano Stabellini <stefano.stabellini@xxxxxxxxxxxxx>
Cc: Ian Campbell <ian.campbell@xxxxxxxxxx>
Cc: Wei Liu <wei.liu2@xxxxxxxxxx>
 docs/Makefile | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/docs/Makefile b/docs/Makefile
index 2c0903b..73a61a5 100644
--- a/docs/Makefile
+++ b/docs/Makefile
@@ -110,7 +110,7 @@ install-html: html txt figs
 install: install-man-pages install-html
 html/index.html: $(DOC_HTML) $(CURDIR)/gen-html-index INDEX
-       $(PERL) -w -- $(CURDIR)/gen-html-index -i INDEX html $(DOC_HTML)
+       $(PERL) -w -- $(CURDIR)/gen-html-index -i INDEX html $(sort $(DOC_HTML))
 html/%.html: %.markdown
        $(INSTALL_DIR) $(@D)
@@ -152,8 +152,8 @@ html/hypercall/%/index.html: $(CURDIR)/xen-headers Makefile
        $(INSTALL_DIR) $(@D)
        $(PERL) -w $(CURDIR)/xen-headers -O $(@D) \
                -T 'arch-$* - Xen public headers' \
-               $(patsubst %,-X arch-%,$(filter-out $*,$(DOC_ARCHES))) \
-               $(patsubst %,-X xen-%,$(filter-out $*,$(DOC_ARCHES))) \
+               $(sort $(patsubst %,-X arch-%,$(filter-out $*,$(DOC_ARCHES)))) \
+               $(sort $(patsubst %,-X xen-%,$(filter-out $*,$(DOC_ARCHES)))) \
                $(EXTRA_EXCLUDE) \
                $(XEN_ROOT)/xen include/public include/xen/errno.h

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