72 lines
1.6 KiB
Bash
Executable File
72 lines
1.6 KiB
Bash
Executable File
#!/bin/sh
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_usage () {
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cat<<EOF
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Usage: ${1##*/} [OPTIONS] FOLDERS
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Output index of folder hierarchies to stdout. This is used as a small "backup"
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purpose. In case of data loss, it is still possible to get the full file list
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thanks to the indexes.
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Options:
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-f: When outputting to a file, overwrite if it exists.
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-w: Output each index to individual files in current folder. It uses the folder
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name as basename.
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EOF
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}
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opt_noclobber=true
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opt_file=false
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while getopts ":fhw" opt; do
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case $opt in
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f)
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opt_noclobber=false ;;
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h)
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_usage "$0"
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exit 0 ;;
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w)
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opt_file=true ;;
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\?)
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_usage "$0"
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exit 1 ;;
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esac
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done
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shift $(($OPTIND - 1))
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if [ $# -eq 0 ]; then
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_usage "$0"
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exit 1
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fi
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## 'realpath' is required in case argument is ending with '.' or '..'.
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if ! command -v realpath >/dev/null 2>&1; then
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echo "'realpath' not found in PATH. Exiting." >&2
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exit 1
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fi
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for i ; do
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## Find over '.*' and '*', is bad practice since if will fail on
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## non-existing files or for files beginning with a dash. The 'printf'
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## command in find is for GNU find only.
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## The two following lines do the same for the same time cost. The former is shorter.
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# find "$i" -type f | awk -v str="$i" '{l=length(str)+2; print substr($0, l)}' | sort > "$OUTPUT"
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## 'LC_ALL=C sort' is required to make sure to output is consistent across
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## different systems.
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(cd -- "$i" && find . -type f) | sed 's/^.\///' | LC_ALL=C sort | \
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if $opt_file; then
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i="$(realpath -- "$i")"
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base="${i##*/}"
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[ ! -d "$i" ] && continue
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output="$base.index"
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[ -e "$OUTPUT" ] && $opt_noclobber && output="$base-$(date +%F-%T).index"
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echo "$output"
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cat > "$output"
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else
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cat
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fi
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done
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