#! /bin/bash -ex

## @id $Id$

## Resolve Debian Build Dependencies
## Installs all the required packages
## Call: ./resolve-debbuilddeps 'name of build schroot'
## e.g. call: ./resolve-debbuilddeps trusty_amd64

##       1         2         3         4         5         6         7         8
## 45678901234567890123456789012345678901234567890123456789012345678901234567890

SCHROOTNAME="$1"

function install() {
    if test -n "${SCHROOTNAME}"; then
        if schroot -c "${SCHROOTNAME}" -u root -d / -- apt-get -y install $*; then
            return 0
        fi
    else
        if apt-get -y install $*; then
            return 0
        fi
    fi
}

if test -e debian/control.in -a ! -e debian/control; then
    sed 's,@[^@]*@, dummytext,g' debian/control.in > debian/control
    trap "rm debian/control" INT TERM EXIT
fi

if test -n "${SCHROOTNAME}"; then
  schroot -c "${SCHROOTNAME}" -u root -d / -- apt-get -y install dpkg-dev
  DEPS=$(schroot -c "${SCHROOTNAME}" -- dpkg-checkbuilddeps 2>&1 || true)
else
  apt-get -y install dpkg-dev
  DEPS=$(dpkg-checkbuilddeps 2>&1 || true)
fi
DEPS=$(echo "$DEPS" | sed -n '/Unmet build dependencies/ { s,.*Unmet build dependencies: ,,g; s, ([^)]*),,g; s, *| *,|,g; p}')

TO_INSTALL=
for pa in ${DEPS}; do
    if test ${pa//|/} = ${pa}; then
        TO_INSTALL+=" ${pa}"
        continue;
    fi
    success=0
    for p in ${pa//|/ }; do
        if install ${TO_INSTALL} ${p}; then
            TO_INSTALL+=" ${p}"
            success=1
            break
        fi
    done
    if test ${success} -eq 0; then
        echo "**** Error: Installation Failed: ${pa}"
        exit 1
    fi
done

if test -n "${TO_INSTALL}" && ! install ${TO_INSTALL}; then
    echo "**** Error: Installation Failed: ${TO_INSTALL}"
    exit 1
fi

echo "**** Success: All Dependencies Resolved"