#!/usr/bin/env bash
set -euo pipefail
set -x

# package-deb.sh
#
# SUMMARY
#
#   Packages a .deb file to be distributed in the APT package manager.
#
# ENV VARS
#
#   $TARGET         a target triple. ex: arm64-apple-darwin (no default)

TARGET="${TARGET:?"You must specify a target triple, ex: arm64-apple-darwin"}"

#
# Local vars
#

PROJECT_ROOT="$(pwd)"
PACKAGE_VERSION="${VECTOR_VERSION:-"$(${VDEV:-cargo vdev} version)"}"
ARCHIVE_NAME="vector-${PACKAGE_VERSION}-$TARGET.tar.gz"
ARCHIVE_PATH="target/artifacts/$ARCHIVE_NAME"
ABSOLUTE_ARCHIVE_PATH="$PROJECT_ROOT/$ARCHIVE_PATH"

#
# Header
#

echo "Packaging .deb for $ARCHIVE_NAME"
echo "TARGET: $TARGET"

#
# Unarchive
#

# Unarchive the tar since cargo deb wants direct access to the files.
td="$(mktemp -d)"
pushd "$td"
tar -xvf "$ABSOLUTE_ARCHIVE_PATH"
mkdir -p "$PROJECT_ROOT/target/$TARGET/release"
mv "vector-$TARGET/bin/vector" "$PROJECT_ROOT/target/$TARGET/release"
popd
rm -rf "$td"

# Display disk space
df -h

#
# Package
#

# Create short plain-text extended description for the package
EXPANDED_LINK_ALIASED="$(cmark-gfm "$PROJECT_ROOT/README.md" --to commonmark)" # expand link aliases
TEXT_BEFORE_FIRST_HEADER="$(sed '/^## /Q' <<<"$EXPANDED_LINK_ALIASED")"        # select text before first header
PLAIN_TEXT="$(cmark-gfm --to plaintext <<<"$TEXT_BEFORE_FIRST_HEADER")"        # convert to plain text
FORMATTED="$(fmt -uw 80 <<<"$PLAIN_TEXT")"
cat <<<"$FORMATTED" >"$PROJECT_ROOT/target/debian-extended-description.txt"

# Create the license file for binary distributions (LICENSE + NOTICE)
cat LICENSE NOTICE >"$PROJECT_ROOT/target/debian-license.txt"

#
# Build the deb
#
#   --target
#     tells the builder everything it needs to know about where
#     the deb can run, including the architecture
#
#   --no-build
#     because this step should follow a build

cargo deb --target "$TARGET" --deb-version "${PACKAGE_VERSION}-1" --variant "$TARGET" --no-build --no-strip

# Rename the resulting .deb file to remove TARGET from name.
for file in target/"${TARGET}"/debian/*.deb; do
  base=$(basename "${file}")
  nbase=${base//-${TARGET}/}
  # the file won't have TARGET in its name if not a "variant"
  if [[ "${file}" != target/"${TARGET}"/debian/"${nbase}" ]]; then
    mv "${file}" target/"${TARGET}"/debian/"${nbase}"
  fi
done

#
# Move the deb into the artifacts dir
#

mv -v "target/$TARGET/debian"/*.deb target/artifacts