test

#!/bin/bash
set -u
set -o pipefail
PATH=/tmp/texlive/bin/x86_64-linux:$PATH

travis_fold_start() {
    if [ ! -z ${TRAVIS:-} ]; then
        echo -e "travis_fold:start: $1\033[33;1m$2\033[0m"
    else
        echo -e "::group:: $1 \033[33;1m$2\033[0m"
    fi
}

travis_fold_end() {
    if [ ! -z ${TRAVIS:-} ]; then
        echo -e "\ntravis_fold:end: $1\r"
    else
        echo -e "\n::endgroup::\n"
    fi
}

latexclean() {
    rm -f *.bbl *.aux *.log *.out *.bcf *.blg *.fls *.hd *.fdb_latexmk *.run.xml *.syctex.gz
}

latexmake() {
    TEXMAIN=$1
    travis_fold_start latexmk.1 "latexmk $TEXMAIN"
    latexclean
    
    latexmk -silent -halt-on-error -interaction=nonstopmode -gg --pdf $TEXMAIN
    if [ $? -ne 0 ]; then
        travis_fold_end latexmk.1
        echo "Error: latexmk failed"
        LOGFILE=${TEXMAIN%.*}.log
        cat "$LOGFILE"
        exit 1
    fi
    travis_fold_end latexmk.1
}

check_snapshot() {
    name=$1
    pdftoppm -scale-to 800 -png ${name}.pdf ${name}-new
    for new in ${name}-new-*.png; do
        old=${new//"-new"}
        if [ ! -e $old ]; then
            echo "Warning: $old does not exist, creating it now"
            mv $new $old
            continue
        fi
        diff -q ${old} ${new} > /dev/null
        if [ $? -ne 0 ]; then
            echo "Error: ${old} and ${new} are different (use diffimg to visualize the differences)"
            ERROR=1
        else
            rm -f ${new}
        fi
    done
}

ERROR=0
for tex in test-*.tex; do
    latexmake "$tex"
    testname=$(basename $tex .tex)
    check_snapshot $testname
done
exit $ERROR