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https://github.com/endeavouros-team/eos-bash-shared.git
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EndeavourOS
129 lines
3.0 KiB
Bash
Executable File
129 lines
3.0 KiB
Bash
Executable File
#!/bin/bash
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# Show parts of a given package file name.
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DIE() {
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echo "$progname: error: $1" >&2
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Usage
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exit 0
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}
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Usage() {
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cat <<EOF
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Usage:
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$progname -h|--help
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Shows this help.
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$progname [--real] "parts" "package-file-name"
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--real
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Give output as in real parts of the package name.
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parts
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String of upper case letters consisting of: N V R A C E.
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N = pkgname
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V = pkgver
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R = pkgrel
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A = arch
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C = compressor
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E = epoch
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These letters specify what the output will contain.
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The output values are separated by the pipe '|' character.
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package-file-name
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Name of a package file.
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Examples:
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$ $progname NEVRAC foo-bar-2:22.04.23-1-any.pkg.tar.zst
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foo-bar|2|22.04.23|1|any|zst
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$ $progname --real NEVRAC foo-bar-2:22.04.23-1-any.pkg.tar.zst
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foo-bar-2:22.04.23-1-any.zst
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EOF
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}
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SeparateParts() {
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local pkg="$1"
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local all=$(echo "$pkg" | sed -E 's/([a-zA-Z0-9@_+][a-zA-Z0-9@._+-]+)-([0-9:]*[^:/\-\ \t]+)-([0-9.]+)-([a-z0-9_]+)\.pkg\.tar\.([a-z0-9]+)$/\1 \2 \3 \4 \5/')
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# name........................... epoch..pkgver...... pkgrel. arch...... compress.
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all=($(echo $all))
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local N=${all[0]}
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local V=${all[1]} # may include epoch!
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local R=${all[2]}
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local A=${all[3]}
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local C=${all[4]}
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local E="0" # default (=unspecified) epoch is 0
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local sep=""
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local result=""
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local ix item
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case "$real_out" in
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yes) sep="-" ;; # for most components
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no) sep="|" ;; # for all
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esac
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if [ "${V%:*}" != "$V" ] ; then
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E="${V%:*}"
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V="${V#*:}"
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fi
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for ((ix=0; ix < ${#parts}; ix++)) ; do
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item="${parts:$ix:1}"
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case "$item" in
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N) result+="$N$sep" ;;
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V) result+="$V$sep" ;;
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R) result+="$R$sep" ;;
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A) result+="$A$sep" ;;
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C) result+="$C$sep" ;;
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E) case "$real_out" in
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yes) [ $E -ne 0 ] && result+="$E:" ;; # don't show epoch if it is zero
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no) result+="$E$sep" ;;
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esac
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;;
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*) DIE "given parameter '$parts' includes an unsupported value '$item'." ;;
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esac
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done
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[ -n "$result" ] || DIE "no result!"
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result="${result:: -1}"
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[ -n "$result" ] || DIE "result is empty!"
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echo "$result"
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}
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Main() {
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local real_out=no
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local parts
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local pkg
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local progname="$(basename "$0")"
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case "$1" in
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-h | --help)
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Usage
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return 0
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;;
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--real)
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real_out=yes
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shift
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;;
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-*)
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Usage
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return 1
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;;
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esac
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parts="$1"
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pkg="$2"
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if [ -n "$pkg" ] ; then
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SeparateParts "$pkg"
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else
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while read pkg ; do
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SeparateParts "$pkg"
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done
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fi
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}
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Main "$@"
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