added docker copy polyfill script

Author: gchudnov

dcp.sh

@@ -0,0 +1,191 @@
+#!/bin/sh
+set -e
+
+# v1.0.0
+
+# The MIT License (MIT)
+#
+# Copyright (c) 2015 Grigoriy Chudnov
+#
+# Permission is hereby granted, free of charge, to any person obtaining a copy
+# of this software and associated documentation files (the "Software"), to deal
+# in the Software without restriction, including without limitation the rights
+# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+# copies of the Software, and to permit persons to whom the Software is
+# furnished to do so, subject to the following conditions:
+#
+# The above copyright notice and this permission notice shall be included in all
+# copies or substantial portions of the Software.
+#
+# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+# SOFTWARE.
+
+self=$0
+
+# print an error
+fatal () {
+  echo "$0:" "$@" >&2
+  exit 1
+}
+
+# test whether a string contains the given substring
+string_contain() { [ -n "$2" ] && [ -z "${2##*$1*}" ]; }
+
+# test for container path
+is_container_path() { string_contain ':' "$1"; }
+
+# make directory inside the container
+container_mkdir() {
+  docker exec -i "$1" sh -c "[ -d $2 ] || mkdir -p $2"
+}
+
+# copy host file to container
+container_cp() {
+  cmd="docker exec -i $2 sh -c 'cat > $3' < $1"
+  eval "$cmd";
+}
+
+# transfer file or directory from the host to a container
+transfer_host_container() {
+  item_base_dir=$1
+  item_path=$2
+  container_id=$3
+  container_dir=$4
+
+  it_dir=''
+  if [ -d "$item_path" ]; then
+    it_dir=$item_path
+  elif [ -f "$item_path" ]; then
+    it_dir=$(dirname "$item_path")
+    it_file=$(basename "$item_path")
+  fi
+
+  if [ "$it_dir" ]; then
+    dst_dir="$container_dir"${it_dir##*$item_base_dir}
+    container_mkdir "$container_id" "$dst_dir"
+
+    if [ -f "$item_path" ]; then
+      dst_path="$dst_dir/$it_file"
+      container_cp "$item_path" "$container_id" "$dst_path"
+    fi
+  fi
+}
+
+# copy CONTAINER:PATH -> HOSTPATH
+copy_container_host() {
+  docker cp "$1" "$2"
+}
+
+# copy HOSTPATH -> CONTAINER:PATH22
+copy_host_container() {
+  src_path=$1
+  dst_container=${2%%:*}
+  dst_path=${2##*:}
+
+  if [ -f "$src_path" ]; then
+    transfer_host_container $(dirname "$src_path") "$src_path" "$dst_container" "$dst_path"
+  elif [ -d "$src_path" ]; then
+    dst_path=$dst_path'/'$(basename "$src_path")
+    find "$src_path" -print0 | xargs -0 bash -c '. $0 --source-only; for it; do transfer_host_container '"$src_path"' $it '"$dst_container"' '"$dst_path"'; done;' "$self"
+  else
+    fatal "path $src_path not found"
+  fi
+}
+
+# copy CONTAINER1:PATH -> CONTAINER2:PATH
+copy_container_container() {
+  tmp_dir=$(mktemp -d)
+  copy_container_host "$1" "$tmp_dir"
+  copy_host_container "$tmp_dir"'/'$(basename "$1") "$2"
+  rm -r "$tmp_dir"
+}
+
+usage() {
+  script=$(basename "$0")
+  echo "Usage: $script [OPTIONS] SOURCE DESTINATION
+
+Copies files and directories between running containers and host
+
+Patterns:
+  $script CONTAINER:PATH HOSTPATH
+  $script HOSTPATH CONTAINER:PATH
+  $script CONTAINER1:PATH CONTAINER2:PATH
+
+Examples:
+* CONTAINER:PATH -> HOSTPATH
+  $script kickass_yonath:/home/data.txt .
+    - Copies '/home/data.txt' from 'kickass_yonath' container to the current host directory
+
+* HOSTPATH -> CONTAINER:PATH
+  $script ./test.txt kickass_yonath:/home/e1/e2
+    - Copies 'test.txt' from the current host directory to '/home/e1/e2' in the 'kickass_yonath' container
+
+  $script /home/user/Downloads/test.txt kickass_yonath:/home/e1/e2
+    - Copies 'test.txt' from the host directory to '/home/e1/e2' in the 'kickass_yonath' container
+
+  $script /home/user/Downloads kickass_yonath:/home/d1/d2
+    - Copies the entire 'Downloads' directory to '/home/d1/d2' in the 'kickass_yonath' container
+
+* CONTAINER1:PATH -> CONTAINER2:PATH
+  $script kickass_yonath:/home ecstatic_colden:/
+    - Copies the entire 'home' directory from 'kickass_yonath' to 'ecstatic_colden'
+
+  $script kickass_yonath:/home/data.txt ecstatic_colden:/
+    - Copies 'data.txt' file from 'kickass_yonath' conrainer to the 'ecstatic_colden' container
+
+Options:
+    -h       Display this help message
+"
+}
+
+main() {
+  # parse options
+  while getopts ':h:' option; do
+    case "${option}" in
+      h) usage
+         exit
+         ;;
+     \?) fatal "Invalid option: -$OPTARG"
+         exit
+         ;;
+    esac
+  done
+  shift $((OPTIND - 1))
+
+  # check arguments
+  if [ $# -eq 0 ]; then
+    usage
+    exit
+  fi
+
+  # run
+  src=$1
+  dst=$2
+
+  if [ -n "$src" ] && [ -n "$dst" ]; then
+    if is_container_path "$src"; then
+      if is_container_path "$dst"; then
+        copy_container_container "$src" "$dst"
+      else
+        copy_container_host "$src" "$dst"
+      fi
+    else
+      if is_container_path "$dst"; then
+        copy_host_container "$src" "$dst"
+      else
+        fatal "cannot copy files/folders from a host path to a host path"
+      fi
+    fi
+  else
+    usage
+  fi
+}
+
+if [ "$1" != "--source-only" ]; then
+  main "${@}"
+fi