Source: pbuilder Version: 0.219 Severity: wishlist Tags: patch User: [email protected] Usertags: randomness X-Debbugs-Cc: [email protected]
Hi! While working on the "reproducible builds" effort [1], we have noticed that pbuilder could not be built reproducibly. The PDF documentation is varying in the /ID field (but not the Creation/Modification time fields). After some debugging I found out that dblatex (which generates the tex file that is used to build the pdf), is building the documentation in a random directory. Since our pdflatex honours SOURCE_DATE_EPOCH, the Creation/Modification times did not differ. But the absolute source file path (which is random) is also part of the /ID calculation. The attached patch fixes the unreproducibility by telling dblatex to build in a deterministic path. Regards, Reiner [1]: https://wiki.debian.org/ReproducibleBuilds
diff --git a/Documentation/Makefile b/Documentation/Makefile index 4fc2513..f6ac106 100644 --- a/Documentation/Makefile +++ b/Documentation/Makefile @@ -26,7 +26,7 @@ pbuilder-doc.%.po: $(MASTERXML) %.pdf: %.xml # requires dblatex package. - dblatex $< + dblatex --tmpdir=docbuild $< install: $(HTMLDOCS) pbuilder-doc.pdf install -d -m 755 -o root -g root $(DESTDIR)/usr/share/doc/pbuilder/
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