feat: Add backup.sh
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06c7c2349a
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66
src/baf
66
src/baf
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#! /usr/bin/env bash
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# baf -- backup automation micro-framework.
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# Copyright (c) 2022 ge <https://nixhacks.net/>
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#
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# This program is free software: you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program. If not, see <https://www.gnu.org/licenses/>.
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baf_version='0.0.0'
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BAFLIB="./lib"
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# Source library
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. ${BAFLIB}/*
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print_help() {
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cat <<- EOF
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Backup files and databases.
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Usage: $0 [-hv] <arguments>..
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Options:
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-h, --help print this help message and exit.
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-v, --version print version and exit.
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EOF
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}
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# Print help if no arguments passed
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[[ "$@" ]] || { print_help; exit 1; }
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# Transform long options to short ones
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for arg in "$@"; do
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shift
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case "$arg" in
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--help) set -- "$@" "-h";;
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--version) set -- "$@" "-v";;
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*) set -- "$@" "$arg";;
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esac
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done
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# Parse short options
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while getopts ":hvS" opt; do
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case "$opt" in
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h) print_help; exit 0;;
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v) echo "$buf_version"; exit 0;;
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*) echo "Unknown option $opt" >&2; exit 1;;
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esac
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done
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# Parse positional arguments
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shift $(($OPTIND - 1))
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while (( "$#" )); do
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case "$1" in
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*) posargs+=("$1"); shift;; # Save args
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esac
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done
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136
src/bafscript
Executable file
136
src/bafscript
Executable file
@ -0,0 +1,136 @@
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#! /usr/bin/env bash
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# bafscript -- backup automation micro-framework.
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# Copyright (c) 2022 ge <https://nixhacks.net/>
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#
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# This program is free software: you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program. If not, see <https://www.gnu.org/licenses/>.
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__version='0.0.0'
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__config=
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__log_file='./log.txt'
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__tar_options='-czf'
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__name_date_fmt='_%Y%m%d-%H%M'
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if [ -n "$BAFLIB" ]; then
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__library="$BAFLIB"
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else
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__library='./lib'
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fi
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# Source library
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for file in "$__library"/*; do
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. "$file"
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done
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print_help() {
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cat <<- EOF
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Backup files and databases.
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Usage: $0 [-cvlhV] ARGUMENTS..
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Options:
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-c, --config config file.
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-v, --verbose verbose output.
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-l, --log-file log file.
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-h, --help print this help messagea and exit.
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-V, --version print version and exit.
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Environment:
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BAFLIB path to baf library [current: $__library]
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EOF
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}
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# ---------------------------------------------------------- #
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# * CLI Arguments Parser #
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# ---------------------------------------------------------- #
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optval() {
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# GNU-style CLI options parser.
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#
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# Parse --opt VAL and --opt=VAL options.
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# Requires 2 arguments: $1, $2.
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# Return variables:
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# opt option name.
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# val option value.
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# sft value for shift.
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if [[ "$1" =~ .+=.+ ]]; then
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opt="${1%%=*}"; val="${1#*=}"; sft=1
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elif [[ ! "$1" =~ .+=$ ]] && [ "$2" ] && [ "${2:0:1}" != "-" ]; then
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opt="$1"; val="$2"; sft=2
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else
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opt="$1"
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if [[ "$1" =~ .+=$ ]]; then opt="${1:0: -1}"; fi
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echo "Error: Missing argument for $opt" >&2; exit 1
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fi
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}
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# Print help if no arguments passed
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[[ "$#" == 0 ]] && { print_help; exit 1; }
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# Split combined short options, e.g. '-abc' to '-a' '-b' '-c'
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for args in "$@"; do
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shift
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case "$args" in
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--*)
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set -- "$@" "$args";; # save long options
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-*)
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args="$(echo "${args:1}" | grep -o . | xargs -I {} echo -n '-{} ')"
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set -- "$@" $args;;
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*)
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set -- "$@" "$args";; # save positional arguments
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esac
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done
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# Final arguments parser
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while (( "$#" )); do
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case "$1" in
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-c|--config|--config=*) optval "$1" "$2"; __config="$val"; shift "$sft";;
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-v|--verbose) __verbose=1; shift;;
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-l|--log-file|--log-file=*) optval "$1" "$2"; __log_file="$val"; shift "$sft";;
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-h|--help) print_help; exit 1;;
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-V|--version) echo "$__version"; exit 0;;
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-*) echo "Error: Unknown option: $1" >&2; exit 1;;
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*) __args+=("$1"); shift;; # Save positional args
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esac
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done
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# ---------------------------------------------------------- #
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# * Do backups #
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# ---------------------------------------------------------- #
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for script in "${__args[@]}"; do
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source_script "$script"
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# Initialise variables
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__user_script="$script"
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backups=() # Array of created backups, contains full pathes
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# Run prepare() before all if set
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if is_function_set prepare; then
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prepare
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fi
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# Run user defined backup() if set or builtin_backup()
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if is_function_set backup; then
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backup
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else
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builtin_backup
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fi
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# Run post backup function if set
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if is_function_set finalise; then
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finalise
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fi
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done
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251
src/lib/backup.sh
Normal file
251
src/lib/backup.sh
Normal file
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#! /usr/bin/env bash
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# backup.sh - functions for backup processing.
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# Copyright (c) 2022 ge <https://nixhacks.net/>
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#
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# This program is free software: you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program. If not, see <https://www.gnu.org/licenses/>.
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process_source() {
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# Run handler function for source URI by scheme.
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#
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# Usage: process_source URI
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local uri
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local scheme
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local handler
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uri="$1"
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scheme="${uri%%:*}"
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case "$scheme" in
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file) handler='backup_files';;
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mysql) handler='backup_mysql';;
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postgres) handler='backup_postgres';;
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sqlite) handler='backup_sqlite';;
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*) echo "Error: Unsupported URI scheme: $scheme" >&2; exit 1;;
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esac
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# Run handler function
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"$handler" "$uri"
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}
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process_target() {
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# Run handler function for target URI by scheme.
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#
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# Usage: process_target URI
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local uri
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local scheme
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local handler
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uri="$1"
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scheme="${uri%%:*}"
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case "$scheme" in
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file) handler='transfer_files';;
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ftp) handler='transfer_ftp';;
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sftp) handler='transfer_sftp';;
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rsync) handler='transfer_rsync';;
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s3) handler='transfer_s3';;
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sj) handler='transfer_sj';;
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swift) handler='transfer_swift';;
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dav) handler='transfer_dav';;
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davs) handler='transfer_davs';;
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*) echo "Error: Unsupported URI scheme: $scheme" >&2; exit 1;;
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esac
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# Run handler function
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"$handler" "$uri"
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}
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builtin_backup() {
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# Backup function.
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#
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# Usage: builtin_backup
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for source in "${sources[@]}"; do
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process_source "$source"
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done
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for target in "${targets[@]}"; do
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process_target "$target"
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done
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}
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# ---------------------------------------------------------- #
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# * Backup functions #
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# ---------------------------------------------------------- #
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backup_files() {
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# Backup local files with tar(1). Handle 'file' URI scheme.
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#
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# Usage: backup_files URI
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local uri
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local src_path
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local dst_path
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local archive
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local file_ext
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uri="$1"
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dst_path="$__main_target_path"
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parse_uri "$uri"
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if [ -f "$path" ] || [ -d "$path" ]; then
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src_path="$path"
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else
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echo "Error: Path '$path' from URI '$uri' does not exists" >&2
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exit 1
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fi
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is_installed tar # Exit if tar is not installed
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# Overwrire __tar_options
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if [ -n "$tar_options" ]; then
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__tar_options="$tar_options"
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fi
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# TODO выбор сжатия, можно в переменной __tar_options заменять букву z на
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# другую для соответствующего сжатия
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file_ext=.tar.gz
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archive="${dst_path}/$(gen_backup_name "$file_ext")"
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tar "$__tar_options" "$archive" "$src_path" |& log -p
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# Append path to 'backups' array
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backups+=("$archive")
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}
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backup_mysql() {
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echo Not implemented >&2; exit 1
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}
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backup_postgres() {
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echo Not implemented >&2; exit 1
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}
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backup_sqlite() {
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echo Not implemented >&2; exit 1
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}
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# ---------------------------------------------------------- #
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# * Functions for targets processing #
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# ---------------------------------------------------------- #
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transfer_files() {
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# Transfer files to another location from __main_target_path using cp(1)
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#
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# Usage: transfer_files URI
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local uri
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local dst_path
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uri="$1"
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if [[ "$uri" == "$__main_target" ]]; then
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: # Do nothing. Source and destination is the same
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else
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# Copy backups to another destination
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parse_uri "$uri"
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if [ -f "$path" ] || [ -d "$path" ]; then
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dst_path="$path"
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else
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echo "Error: Path '$path' from URI '$uri' does not exists" >&2
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exit 1
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fi
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# Copy files preserving metadata
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for backup in "${backups[@]}"; do
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cp --archive "$backup" "$dst_path"
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done
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fi
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}
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transfer_ftp() {
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echo Not implemented >&2; exit 1
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}
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transfer_sftp() {
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echo Not implemented >&2; exit 1
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}
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transfer_rsync() {
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echo Not implemented >&2; exit 1
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}
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transfer_s3() {
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echo Not implemented >&2; exit 1
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}
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transfer_sj() {
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echo Not implemented >&2; exit 1
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}
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transfer_swift() {
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echo Not implemented >&2; exit 1
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}
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transfer_dav() {
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echo Not implemented >&2; exit 1
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}
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transfer_davs() {
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echo Not implemented >&2; exit 1
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}
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# ---------------------------------------------------------- #
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# * Helper functions #
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# ---------------------------------------------------------- #
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is_installed() {
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# Check if the program is installed.
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# See good answer: https://stackoverflow.com/a/677212
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#
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# Usage: is_installed COMMAND
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local cmd
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cmd="$1"
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if ! command -v "$cmd" >/dev/null 2>&1; then
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echo "Error: Command $cmd not found." \
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"Please install $cmd or check your PATH if it's actually installed." >&2
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exit 1
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fi
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}
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gen_backup_name() {
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# Generate backup file name. Return (echo) string.
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#
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# Usage: gen_backup_name NAME_EXT
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local prefix
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local name
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local date_fmt
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local name_ext
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[ -n "$name_prefix" ] || { prefix="${__user_script}_"; }
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name="$(basename $path)" # 'path' is variable parsed from URI
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name_ext="$1"
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# Overwrite __name_date_fmt
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if [ -n "$name_date_fmt" ]; then
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__name_date_fmt="$name_date_fmt"
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fi
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date +"${prefix}${name}${__name_date_fmt}${name_ext}"
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}
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