Dockerfile.build

#!/bin/bash
cd "$(dirname "$0")"  # jump to curdir

# Pass these on the command line.
oscodename=${1:-debian/stretch}  # debian/stretch

buildversion=$(sed -e '1!d;s/.*(//;s/).*//' changelog)
upname=asterisk-g72x
upversion=$(echo "$buildversion" | sed -e 's/-.*//;s/^[0-9]*://')
debepoch=$(echo "$buildversion" | sed -e '/^[0-9]*:/!d;s/:.*/:/')
debversion=$(echo "$buildversion" | sed -e 's/[^-]*-//;s/+[^+]*$//')
dockversion=$(echo "build-$upname-$buildversion" |
              sed -e 's/^[0-9]*://;s/[^A-Za-z0-9.-]/_/g')

echo "Usage: $0 [$oscodename]"
echo ".. continuing"

osdistro=${oscodename%/*}   # debian (or ubuntu)
oscodename=${oscodename#*/} # stretch (or bionic)
osdistshort=${osdistro:0:3} # deb (or ubu)
case $osdistro/$oscodename in
debian/buster)  oscodenum=10;;
debian/stretch) oscodenum=9;;
debian/jessie)  oscodenum=8;;
debian/wheezy)  oscodenum=7;;
ubuntu/bionic)  oscodenum=18.04;;
ubuntu/xenial)  oscodenum=16.04;;
ubuntu/trusty)  oscodenum=14.04;;
*) echo "ERROR: undefined OS: $osdistro/$oscodename" >&2 && exit 1
esac
_shortver=$osdistshort$oscodenum

# Update changelog
sed -i -e "1s/+\\(deb\\|ubu\\)[0-9.]*) [a-z]\\+;/+$_shortver) $oscodename;/" \
    changelog

# Docker disallows certain tokens in versions.
dockversion=$(echo build-${upname}-${upversion}-${debversion}-${oscodename} |
    sed -e 's/[^0-9A-Za-z_.-]/_/g')

# Will build files.
if ! docker build \
    --pull \
    --ulimit nofile=512 \
    --build-arg osdistro=$osdistro \
    --build-arg osdistshort=$osdistshort \
    --build-arg oscodename=$oscodename \
    --build-arg upname=$upname \
    --build-arg upversion=$upversion \
    --build-arg debepoch=$debepoch \
    --build-arg debversion=$debversion \
    -t $dockversion \
    -f Dockerfile \
    .
then
    ret=$?
    echo "fail" >&2
    exit $ret
fi

# Copy files to ./Dockerfile.out
test -d Dockerfile.out/$oscodename || mkdir -p Dockerfile.out/$oscodename
docker run $dockversion sh -c 'cd /dist; tar -zc *' |
    tar -zxvC Dockerfile.out/$oscodename/ |
    sed -e 's#$# -> Dockerfile.out/'$oscodename'/#'