85 lines
1.8 KiB
Bash
Executable File
85 lines
1.8 KiB
Bash
Executable File
#!/usr/bin/env bash
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set -euo pipefail
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if [[ $# -gt 1 ]]; then
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echo "Usage: $0 [path/to/env-file]" >&2
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exit 2
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fi
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SCRIPT_DIR="$(cd "$(dirname "$0")" && pwd)"
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if [[ $# -eq 1 ]]; then
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ENV_FILE="$1"
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elif [[ -f "$SCRIPT_DIR/backup_rsync_git.env" ]]; then
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ENV_FILE="$SCRIPT_DIR/backup_rsync_git.env"
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else
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ENV_FILE="$SCRIPT_DIR/.env"
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fi
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if [[ ! -f "$ENV_FILE" ]]; then
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echo "Env file not found: $ENV_FILE" >&2
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exit 1
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fi
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# shellcheck disable=SC1090
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source "$ENV_FILE"
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required_vars=(
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RSYNC_SOURCE
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RSYNC_TARGET_DIR
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COMMIT_MESSAGE_PREFIX
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)
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for var in "${required_vars[@]}"; do
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if [[ -z "${!var:-}" ]]; then
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echo "Missing required env var: $var" >&2
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exit 1
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fi
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done
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if [[ -z "${RSYNC_RSH:-}" && -z "${SSH_KEY_FILE:-}" ]]; then
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echo "Missing SSH config: set SSH_KEY_FILE or RSYNC_RSH" >&2
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exit 1
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fi
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if [[ -n "${SSH_KEY_FILE:-}" && ! -r "$SSH_KEY_FILE" ]]; then
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echo "SSH key file not readable: $SSH_KEY_FILE" >&2
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exit 1
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fi
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mkdir -p "$RSYNC_TARGET_DIR"
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repo_abs="$(cd "$RSYNC_TARGET_DIR" && pwd)"
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rel_target="."
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if [[ ! -d "$repo_abs/.git" ]]; then
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git -C "$repo_abs" init -b main >/dev/null
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fi
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git_target() {
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git --git-dir="$repo_abs/.git" --work-tree="$repo_abs" "$@"
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}
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if [[ -n "${RSYNC_RSH:-}" ]]; then
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rsync_rsh="$RSYNC_RSH"
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else
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ssh_options="${SSH_OPTIONS:--o IdentitiesOnly=yes -o StrictHostKeyChecking=yes}"
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rsync_rsh="ssh -i $SSH_KEY_FILE $ssh_options"
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fi
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if [[ -n "${rsync_rsh:-}" ]]; then
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rsync -az --delete -e "$rsync_rsh" "$RSYNC_SOURCE" "$repo_abs/"
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else
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rsync -az --delete "$RSYNC_SOURCE" "$repo_abs/"
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fi
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git_target add -A -- "$rel_target"
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if git_target diff --cached --quiet -- "$rel_target"; then
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exit 0
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fi
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timestamp="$(date '+%Y-%m-%d %H:%M:%S')"
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git_target commit -m "$COMMIT_MESSAGE_PREFIX $timestamp" -- "$rel_target"
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