#!/bin/bash

QUIET_ARG=""
[[ "$1" == "--quiet" ]] && QUIET_ARG="--quiet"

# Enter source directory
cd "$( dirname "$0" )" || exit

mapfile -t FILES < <( awk '{print $1}' < "debian/install" )
[[ "${#FILES[@]}" -eq 0 ]] && echo "No file found in debian/install file!" && exit 1
PACKAGE_NAME="$( basename "$( head -n1 <<< "$FILES" )" | tr '_' '-' )"

echo "Clean previous build..."
rm -fr dist

echo "Detect version using git describe..."
VERSION="$( git describe --tags|sed 's/^[^0-9]*//' )"

echo "Create building environemt..."
BDIR="dist/$PACKAGE_NAME-$VERSION"
mkdir -p "$BDIR"
RSYNC_ARG=""
[[ -z "$QUIET_ARG" ]] && RSYNC_ARG="-v"
rsync -a "$RSYNC_ARG" debian/ "$BDIR/debian/"
cp "${FILES[@]}" "$BDIR/"

echo "Set version $VERSION in files..."
for FILE in "${FILES[@]}"; do
    case "$( mimetype -b "$FILE" )" in
        application/x-perl)
            echo "  - in $FILE (perl)"
            sed -i "s/^my \$version *=.*$/my \$version = '$VERSION';/" "$BDIR/$( basename "$FILE" )"
            ;;
        application/x-shellscript)
            echo "  - in $FILE (shellscript)"
            sed -i "s/^VERSION *=.*$/VERSION = '$VERSION'/" "$BDIR/$( basename "$FILE" )"
            ;;
    esac
done

if [[ -z "$DEBIAN_CODENAME" ]]; then
    echo "Retrieve debian codename using lsb_release..."
    DEBIAN_CODENAME=$( lsb_release -c -s )
else
    echo "Use debian codename from environment ($DEBIAN_CODENAME)"
fi

echo "Generate debian changelog using gitdch..."
GITDCH_ARGS=('--verbose')
[[ -n "$QUIET_ARG" ]] && GITDCH_ARGS=('--warning')
if [[ -n "$MAINTAINER_NAME" ]]; then
    echo "Use maintainer name from environment ($MAINTAINER_NAME)"
    GITDCH_ARGS+=("--maintainer-name" "${MAINTAINER_NAME}")
fi
if [[ -n "$MAINTAINER_EMAIL" ]]; then
    echo "Use maintainer email from environment ($MAINTAINER_EMAIL)"
    GITDCH_ARGS+=("--maintainer-email" "$MAINTAINER_EMAIL")
fi
gitdch \
    --package-name "$PACKAGE_NAME" \
    --version "${VERSION}" \
    --code-name "$DEBIAN_CODENAME" \
    --output "$BDIR"/debian/changelog \
    --release-notes dist/release_notes.md \
    "${GITDCH_ARGS[@]}"

if [[ -n "$MAINTAINER_NAME" ]] && [[ -n "$MAINTAINER_EMAIL" ]]; then
    echo "Set Maintainer field in debian control file ($MAINTAINER_NAME <$MAINTAINER_EMAIL>)..."
    sed -i "s/^Maintainer: .*$/Maintainer: $MAINTAINER_NAME <$MAINTAINER_EMAIL>/" \
        "$BDIR"/debian/control
fi

echo "Build debian package..."
cd "$BDIR" || exit
dpkg-buildpackage
# vim:set sw=4 ts=4 sts=4 ft=bash expandtab: