From: Ruben Undheim <ruben.undheim@gmail.com>
Date: Thu, 12 Jul 2018 10:41:21 +0000
Subject: Fix reproducibility of PDF documents in yosys-doc

---
 Makefile                |  6 +++---
 manual/appnotes.sh      |  5 ++++-
 manual/manual.sh        |  6 ++++--
 manual/presentation.sh  | 11 +++++++++--
 manual/presentation.tex |  1 +
 5 files changed, 21 insertions(+), 8 deletions(-)

diff --git a/Makefile b/Makefile
index 065f4f2..8608472 100644
--- a/Makefile
+++ b/Makefile
@@ -766,9 +766,9 @@ update-manual: $(TARGETS) $(EXTRA_TARGETS)
 	cd manual && ../yosys -p 'help -write-tex-command-reference-manual'
 
 manual: $(TARGETS) $(EXTRA_TARGETS)
-	cd manual && bash appnotes.sh
-	cd manual && bash presentation.sh
-	cd manual && bash manual.sh
+	cd manual && PDF_DATE=$(PDF_DATE) bash appnotes.sh
+	cd manual && PDF_DATE=$(PDF_DATE) bash presentation.sh
+	cd manual && PDF_DATE=$(PDF_DATE) bash manual.sh
 
 clean:
 	rm -rf share
diff --git a/manual/appnotes.sh b/manual/appnotes.sh
index 0ae5286..798d9d3 100755
--- a/manual/appnotes.sh
+++ b/manual/appnotes.sh
@@ -7,16 +7,19 @@ do
 	if [ -f $job/make.sh ]; then
 		cd $job
 		bash make.sh
+        sed -i 's#/CreationDate (D:[^)]\+)#/CreationDate ('${PDF_DATE}')#' *.pdf
 		cd ..
 	fi
 	old_md5=$([ -f $job.aux ] && md5sum < $job.aux || true)
 	while
-		pdflatex -shell-escape -halt-on-error $job.tex || exit
+        pdflatex -shell-escape -halt-on-error '\pdfinfo{/CreationDate('${PDF_DATE}')/ModDate('${PDF_DATE}')}\input{'${job}'.tex}' || exit
 		new_md5=$(md5sum < $job.aux)
 		[ "$old_md5" != "$new_md5" ]
 	do
 		old_md5="$new_md5"
 	done
+    grep -av '^/ID \[\(<[0-9A-F]\{32\}>\) \1]$' ${job}.pdf > ${job}.pdf.without_pdf_id
+    mv -f ${job}.pdf.without_pdf_id ${job}.pdf
 	touch $job.ok
 done
 
diff --git a/manual/manual.sh b/manual/manual.sh
index c467393..4417f56 100755
--- a/manual/manual.sh
+++ b/manual/manual.sh
@@ -39,7 +39,7 @@ fi
 
 set -ex
 
-pdflatex $PDFTEX_OPT manual.tex
+pdflatex $PDFTEX_OPT '\pdfinfo{/CreationDate('${PDF_DATE}')/ModDate('${PDF_DATE}')}\input{manual.tex}'
 
 if ! $fast_mode; then
 	bibtex manual.aux
@@ -50,10 +50,12 @@ if ! $fast_mode; then
 		! cmp autoloop.old autoloop.new
 	do
 		cp autoloop.new autoloop.old
-		pdflatex $PDFTEX_OPT manual.tex
+        pdflatex $PDFTEX_OPT '\pdfinfo{/CreationDate('${PDF_DATE}')/ModDate('${PDF_DATE}')}\input{manual.tex}'
 	done
 
 	rm -f autoloop.old
 	rm -f autoloop.new
 fi
 
+grep -av '^/ID \[\(<[0-9A-F]\{32\}>\) \1]$' manual.pdf > manual.pdf.without_pdf_id
+mv -f manual.pdf.without_pdf_id manual.pdf
diff --git a/manual/presentation.sh b/manual/presentation.sh
index ca8a6c9..f2d0a30 100755
--- a/manual/presentation.sh
+++ b/manual/presentation.sh
@@ -29,15 +29,20 @@ set -ex
 if ! $fast_mode; then
 	! md5sum *.aux *.snm *.nav *.toc > autoloop.old
 	make -C PRESENTATION_Intro
+    sed -i 's#/CreationDate (D:[^)]\+)#/CreationDate ('${PDF_DATE}')#' PRESENTATION_Intro/*.pdf
 	make -C PRESENTATION_ExSyn
+    sed -i 's#/CreationDate (D:[^)]\+)#/CreationDate ('${PDF_DATE}')#' PRESENTATION_ExSyn/*.pdf
 	make -C PRESENTATION_ExAdv
+    sed -i 's#/CreationDate (D:[^)]\+)#/CreationDate ('${PDF_DATE}')#' PRESENTATION_ExAdv/*.pdf
 	make -C PRESENTATION_ExOth
+    sed -i 's#/CreationDate (D:[^)]\+)#/CreationDate ('${PDF_DATE}')#' PRESENTATION_ExOth/*.pdf
 	make -C PRESENTATION_Prog
 fi
 
 set -ex
 
-pdflatex $PDFTEX_OPT presentation.tex
+echo ${PDF_DATE}
+pdflatex $PDFTEX_OPT '\pdfinfo{/CreationDate('${PDF_DATE}')/ModDate('${PDF_DATE}')}\input{presentation.tex}'
 
 if ! $fast_mode; then
 	while
@@ -45,10 +50,12 @@ if ! $fast_mode; then
 		! cmp autoloop.old autoloop.new
 	do
 		cp autoloop.new autoloop.old
-		pdflatex $PDFTEX_OPT presentation.tex
+        pdflatex $PDFTEX_OPT '\pdfinfo{/CreationDate('${PDF_DATE}')/ModDate('${PDF_DATE}')}\input{presentation.tex}'
 	done
 
 	rm -f autoloop.old
 	rm -f autoloop.new
 fi
 
+grep -av '^/ID \[\(<[0-9A-F]\{32\}>\) \1]$' presentation.pdf > presentation.pdf.without_pdf_id
+mv -f presentation.pdf.without_pdf_id presentation.pdf
diff --git a/manual/presentation.tex b/manual/presentation.tex
index 8060998..a42648c 100644
--- a/manual/presentation.tex
+++ b/manual/presentation.tex
@@ -81,6 +81,7 @@
 
 \title{Yosys Open SYnthesis Suite}
 \author{Clifford Wolf}
+\date{REPLACEWITHDATE}
 \institute{http://www.clifford.at/yosys/}
 
 \usetheme{Madrid}