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#!/bin/bash
# it generates tex/generic/pgf/pgf.revision.tex which, in turn, will be loaded
# by pgf.sty
#
# The resulting macros define the current version of pgf.
set -e
LATEST_TAG=`git describe --abbrev=0 --tags`
REVISION=`git describe --tags HEAD`
rm -f tex/generic/pgf/pgf.revision.tex
echo '\begingroup' >> tex/generic/pgf/pgf.revision.tex
echo '\catcode`\-=12' >> tex/generic/pgf/pgf.revision.tex
echo '\catcode`\/=12' >> tex/generic/pgf/pgf.revision.tex
echo '\catcode`\.=12' >> tex/generic/pgf/pgf.revision.tex
echo '\catcode`\:=12' >> tex/generic/pgf/pgf.revision.tex
echo '\catcode`\+=12' >> tex/generic/pgf/pgf.revision.tex
echo '\catcode`\-=12' >> tex/generic/pgf/pgf.revision.tex
# this is the REVISION, i.e. the unique hash of the changeset.
echo '\gdef\pgfrevision{'"$REVISION}" >> tex/generic/pgf/pgf.revision.tex
# this is the public version name. It corresponds to the latest tag name in the git repo.
echo '\gdef\pgfversion{'"$LATEST_TAG}" >> tex/generic/pgf/pgf.revision.tex
# this is the commit date of the latest tag, i.e. the date when \pgfversion has been committed.
# It is NOT the date of \pgfrevision.
echo -n '\gdef\pgfversiondatetime{' >> tex/generic/pgf/pgf.revision.tex
git log -n 1 "$LATEST_TAG" --pretty=format:"%ci" >> tex/generic/pgf/pgf.revision.tex
echo '}' >> tex/generic/pgf/pgf.revision.tex
echo -n '\gdef\pgfrevisiondatetime{' >> tex/generic/pgf/pgf.revision.tex
git log -n 1 "$REVISION" --pretty=format:"%ci" >> tex/generic/pgf/pgf.revision.tex
echo '}' >> tex/generic/pgf/pgf.revision.tex
# convert to latex format YYYY/MM/DD :
echo '\gdef\pgf@glob@TMPa#1-#2-#3 #4\relax{#1/#2/#3}' >> tex/generic/pgf/pgf.revision.tex
echo '\xdef\pgfversiondate{\expandafter\pgf@glob@TMPa\pgfversiondatetime\relax}' >> tex/generic/pgf/pgf.revision.tex
echo '\xdef\pgfrevisiondate{\expandafter\pgf@glob@TMPa\pgfrevisiondatetime\relax}' >> tex/generic/pgf/pgf.revision.tex
echo '\endgroup' >> tex/generic/pgf/pgf.revision.tex
exit 0
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