Copy applications and their dependencies (e.g. for chroot envs)

copy_dependencies.sh

#!/bin/bash
#
# Copy applications and their dependencies (e.g. for chroot envs)
#
#
# Copyright Davide Guerri <davide.guerri@gmail.com>
#
# Licensed to the Apache Software Foundation (ASF) under one
# or more contributor license agreements.  See the NOTICE file
# distributed with this work for additional information
# regarding copyright ownership.  The ASF licenses this file
# to you under the Apache License, Version 2.0 (the
# "License"); you may not use this file except in compliance
# with the License.  You may obtain a copy of the License at
#
#   http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing,
# software distributed under the License is distributed on an
# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
# KIND, either express or implied.  See the License for the
# specific language governing permissions and limitations
# under the License.
#

set -ue

if [ $# -lt 3 ]; then
  echo "Usage: $0 <src root dir> <src app> <dst dir>"
  exit 1
fi

src_dir="$1"
app="$2"
dst_dir="$3"

app_path=$(cd "$src_dir" && find -name "$app" | head -1)
echo "Source $app path: $src_dir/$app_path"


copy_deps() {
  local dep="$1"
  local level="${2-1}"
  printf "[%s] Analyzing dependencies of '%s'\n" "$level" "$dep"
  for i in $(readelf -d "$dep" | awk '/NEEDED.+ Shared library/ {print $5}' | \
      tr -d '[]'); do
    lib=$(basename "$i")
    file=$(cd "$src_dir" && find -name "$lib" | head -1)
    if [ -z "$file" ]; then
      echo "'$lib' not found, skipping..."
      continue
    fi
    dir=$(dirname "$file")

    target_dir="$dst_dir/$dir"
    src_file="$src_dir/$file"
    mkdir -p "$target_dir"
    if find "$target_dir" -name "$(basename "$file")" | grep . >/dev/null; then
      printf "[%s] Deps '%s' is already present in '%s', skipping...\n" \
        "$level" "$(basename "$file")" "$dst_dir"
    else
      printf "[%s] Copying '%s' to '%s'\n" "$level" "$src_file" "$target_dir"
      cp "$src_file" "$target_dir"
    fi
    copy_deps "$src_file" "$(expr $level + 1)"
  done
}

copy_deps "$src_dir/$app_path"

echo "Copying application"
dir=$(dirname "$app_path")
echo "Dest $app path: $dst_dir/$app_path"
mkdir -p "$dst_dir/$dir"
cp "$src_dir/$app_path" "$dst_dir/$app_path"