Source: libtommath Severity: normal Tags: patch User: reproducible-bui...@lists.alioth.debian.org Usertags: timestamps X-Debbugs-Cc: reproducible-b...@lists.alioth.debian.org
When the build time and timezone vary, the resulting .pdf file includes an embedded timestamp. It looks like doc/makefile attempts to make the timestamp reproducible in the generated .pdf, but doesn't catch some corner cases. The patch to debian/rules sets FORCE_SOURCE_DATE, which is needed to get texlive to respect SOURCE_DATE_EPOCH. The other patch modifies doc/makefile to use SOURCE_DATE_EPOCH directly rather than a reference timestamp file. Thanks for maintaining libtommath! live well, vagrant
From 031c52564c767985e741a6b10aeedc624544a634 Mon Sep 17 00:00:00 2001 From: Vagrant Cascadian <vagr...@reproducible-builds.org> Date: Fri, 5 Jun 2020 21:26:02 +0000 Subject: [PATCH 1/2] debian/rules: export FORCE_SOURCE_DATE to allow .pdf files to be generated reproducibly. Without FORCE_SOURCE_DATE texlive does not respect SOURCE_DATE_EPOCH: https://reproducible-builds.org/docs/source-date-epoch/ --- debian/rules | 1 + 1 file changed, 1 insertion(+) diff --git a/debian/rules b/debian/rules index 97dbb93..b00c0b5 100755 --- a/debian/rules +++ b/debian/rules @@ -19,6 +19,7 @@ export PREFIX=/usr DEB_HOST_MULTIARCH ?= $(shell dpkg-architecture -qDEB_HOST_MULTIARCH) export LIBPATH = $(PREFIX)/lib/$(DEB_HOST_MULTIARCH) +export FORCE_SOURCE_DATE=1 %: dh $@ -- 2.20.1
From ef8c77d9c5fd62773b467fa6e7b1a5167c4f770b Mon Sep 17 00:00:00 2001 From: Vagrant Cascadian <vagr...@reproducible-builds.org> Date: Fri, 5 Jun 2020 21:55:05 +0000 Subject: [PATCH 2/2] Add patch to use UTC timezone for PDF generation. --- debian/patches/series | 1 + debian/patches/use-utc-timezone | 37 +++++++++++++++++++++++++++++++++ 2 files changed, 38 insertions(+) create mode 100644 debian/patches/use-utc-timezone diff --git a/debian/patches/series b/debian/patches/series index 1652816..198b971 100644 --- a/debian/patches/series +++ b/debian/patches/series @@ -1,3 +1,4 @@ increase-test-timeout remove-undefined-macro fix-shift-count-overflow-on-x32 +use-utc-timezone diff --git a/debian/patches/use-utc-timezone b/debian/patches/use-utc-timezone new file mode 100644 index 0000000..003b86f --- /dev/null +++ b/debian/patches/use-utc-timezone @@ -0,0 +1,37 @@ +Author: Vagrant Cascadian <vagr...@reproducible-builds.org> +Subject: Ensure the date is represented in UTC when generating PDF + files. +Description: Use SOURCE_DATE_EPOCH directly rather than a timestamp + reference file which can vary between builds. + . + https://reproducible-builds.org/docs/source-date-epoch/ + +Index: libtommath/doc/makefile +=================================================================== +--- libtommath.orig/doc/makefile ++++ libtommath/doc/makefile +@@ -16,15 +16,12 @@ docs: manual + + #LTM user manual + mandvi: bn.tex +- cp bn.tex bn.bak +- touch --reference=bn.tex bn.bak +- (printf "%s" "\def\fixedpdfdate{"; date +'D:%Y%m%d%H%M%S%:z' -d @$$(stat --format=%Y bn.tex) | sed "s/:\([0-9][0-9]\)$$/'\1'}/g") > bn-deterministic.tex ++ (printf "%s" "\def\fixedpdfdate{"; date +'D:%Y%m%d%H%M%S%:z' -u -d @$(SOURCE_DATE_EPOCH) | sed "s/:\([0-9][0-9]\)$$/'\1'}/g") > bn-deterministic.tex + printf "%s\n" "\pdfinfo{" >> bn-deterministic.tex + printf "%s\n" " /CreationDate (\fixedpdfdate)" >> bn-deterministic.tex + printf "%s\n}\n" " /ModDate (\fixedpdfdate)" >> bn-deterministic.tex + cat bn.tex >> bn-deterministic.tex + mv bn-deterministic.tex bn.tex +- touch --reference=bn.bak bn.tex + echo "hello" > bn.ind + latex bn ${silent_stdout} + latex bn ${silent_stdout} +@@ -35,7 +32,6 @@ mandvi: bn.tex + manual: mandvi + pdflatex bn >/dev/null + sed -b -i 's,^/ID \[.*\]$$,/ID [<0> <0>],g' bn.pdf +- mv bn.bak bn.tex + rm -f bn.aux bn.dvi bn.log bn.idx bn.lof bn.out bn.toc + + clean: -- 2.20.1
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