Kovri: vastly improve + fix installation script

- Use correct interpreter
- Create error handler
- Simplify $OSTYPE detection + add DragonFlyBSD
- Backup configuration files if already present
- Remove existing installation if present
- Refactor + fix existing installation methods
- Move binary to dedicated location
- Add BSD-3 license
- Add color output

References:
- monero-project/meta#35
- monero-project/kovri#362

kovri/install.sh

@@ -1,48 +1,127 @@
-#!/bin/bash
-# TODO(unassigned): /bin/sh isn't smart enough
+#!/usr/bin/env bash
 
-# Trivial script to install binary/resources using the makeself installer
-# Not to substitute real packaging (this is meant for nightly/branch-tip builds)
+# Copyright (c) 2017, The Kovri I2P Router Project
+#
+# All rights reserved.
+#
+# Redistribution and use in source and binary forms, with or without modification, are
+# permitted provided that the following conditions are met:
+#
+# 1. Redistributions of source code must retain the above copyright notice, this list of
+#    conditions and the following disclaimer.
+#
+# 2. Redistributions in binary form must reproduce the above copyright notice, this list
+#    of conditions and the following disclaimer in the documentation and/or other
+#    materials provided with the distribution.
+#
+# 3. Neither the name of the copyright holder nor the names of its contributors may be
+#    used to endorse or promote products derived from this software without specific
+#    prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY
+# EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+# MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
+# THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+# PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+# INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+# STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
+# THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
-case "$OSTYPE" in
-  linux*)
+#
+# Kovri installer script: installs binary/resources for nightly/branch-tip builds
+#
+
+# Test if terminal is color capable
+if [[ $(tput colors) ]]; then
+  _red="$(tput setaf 1)"
+  _green="$(tput setaf 2)"
+  _yellow="$(tput setaf 3)"
+  _normal="$(tput sgr0)"
+fi
+
+_banner="${_yellow}The Kovri I2P Router Project Installer${_normal}"
+echo $_banner
+
+# Error handler
+catch() {
+  if [[ $? -ne 0 ]]; then
+    echo " ${_red}[ERROR] Failed to install: '$1' ${_normal}"
+    exit 1
+  fi
+  echo " ${_green}[OK]${_normal}"
+}
+
+# Get platform
+case $OSTYPE in
+  linux* | freebsd* | dragonfly*)
     _data="$HOME/.kovri"
-    _path="$HOME/.bin"
     ;;
   darwin*)
     _data="$HOME/Library/Application Support/Kovri"
-    _path="$HOME/Library/Desktop"
-    ;;
-  freebsd*)
-    _data="$HOME/.kovri"
-    _path="$HOME/bin"
     ;;
   msys)
-    _data="$APPDATA\\Kovri"
-    _path="$HOMEPATH\\Desktop"
+    _data="$APPDATA/Kovri"
     ;;
   *)
-    echo "Unsupported platform"
-    exit 1
+    false
+    catch "unsupported platform"
     ;;
 esac
 
-_backup="${_data}-$(date +%Y.%m.%d)" # TODO(anonimal): we'll probably want to backup using revision hash
-_binary="kovri"
+# Backup existing installation
+_config=${_data}/config
+_kovri_conf=${_config}/kovri.conf
+_tunnels_conf=${_config}/tunnels.conf
 
-# Create bin dir if needed
-[ ! -d "$_path" ] && mkdir "$_path"
-
-# Create backup if needed
-[ -d "$_data" ] && mv "$_data" "$_backup" && [ -f "${_path}/${_binary}" ] && mv "${_path}/${_binary}" "$_backup"
-
-# Move resources
-mkdir "$_data" && mv $(ls -A . | grep -v $(basename "$0")) "$_data" && mv "${_data}/${_binary}" "$_path"
-
-if [ $? -ne 0 ]; then
-  echo "Failed to install. See above error messages"
-  exit 1
+if [[ -d $_data ]]; then
+  echo -n "Begin configuration backup..."
+  if [[ -f $_kovri_conf ]]; then
+    mv "$_kovri_conf" "${_kovri_conf}.bak"
+  fi
+  if [[ -f $_tunnels_conf ]]; then
+    mv "$_tunnels_conf" "${_tunnels_conf}.bak"
+  fi
+  catch "could not backup configuration"
 fi
 
-echo "Kovri binary '$_binary' is in $_path"
-echo "Consider adding $_path to your \$PATH"
+# Remove existing install
+_core=${_data}/core
+_client=${_data}/client
+_installed="$_core $_client/address_book/addresses* $_client/certificates"
+
+if [[ -d $_installed ]]; then
+  echo -n "Removing existing install"
+  rm -fr $_installed
+  catch "could not remove existing install"
+fi
+
+# Create new install
+_path=$HOME/bin
+_binary=kovri
+
+if [[ ! -d $_data ]]; then
+  echo -n "Creating ${_data}"
+  mkdir "$_data"
+  catch "could not create $_data"
+fi
+
+if [[ ! -d $_path ]]; then
+  echo -n "Creating ${_path}"
+  mkdir "$_path"
+  catch "could not create $_path"
+fi
+
+_resources=(client config $_binary)
+for _i in ${_resources[@]}; do
+  if [[ $_i != $_binary ]]; then
+    echo -n "Copying $_i to $_data"
+    cp -fR $_i "$_data"
+  else
+    echo -n "Copying $_i to $_path"
+    cp -f $_i "$_path"
+  fi
+  catch "could not copy resource"
+done
+
+echo "${_green}Installation success!${_normal}"