bin/lsarchive: refactor + port to bash

bin/lsarchive

@@ -1,13 +1,11 @@
+#!/usr/bin/env bash
 #
 # Lists the contents of archives.
 #
-# Authors:
+# Adapted from a script by Sorin Ionescu <sorin.ionescu@gmail.com>
-#   Sorin Ionescu <sorin.ionescu@gmail.com>
-#
 
-local verbose
+if (( $# == 0 ))
-
+then
-if (( $# == 0 )); then
   cat >&2 <<EOF
 usage: $0 [-option] [file ...]
 
@@ -18,38 +16,40 @@ Report bugs to <sorin.ionescu@gmail.com>.
 EOF
 fi
 
-if [[ "$1" == "-v" || "$1" == "--verbose" ]]; then
+if [[ "$1" == "-v" || "$1" == "--verbose" ]]
-  verbose=0
+then
-  shift
+    verbose=0
+    shift
 fi
 
-while (( $# > 0 )); do
+while (( $# > 0 ))
-  if [[ ! -s "$1" ]]; then
+do
-    print "$0: file not valid: $1" >&2
+    if [[ ! -s "$1" ]]
+    then
+        >&2 echo "$0: file not valid: $1"
+        shift
+        continue
+    fi
+
+    case "${1:l}" in
+        *.tar.gz|*.tgz) tar t${verbose:+v}vzf "$1" ;;
+        *.tar.bz2|*.tbz|*.tbz2) tar t${verbose:+v}jf "$1" ;;
+        *.tar.xz|*.txz) tar --xz --help &> /dev/null \
+            && tar --xz -t${verbose:+v}f "$1" \
+            || xzcat "$1" | tar t${verbose:+v}f - ;;
+        *.tar.zma|*.tlz) tar --lzma --help &> /dev/null \
+            && tar --lzma -t${verbose:+v}f "$1" \
+            || lzcat "$1" | tar x${verbose:+v}f - ;;
+        *.tar) tar t${verbose:+v}f "$1" ;;
+        *.zip) unzip -l${verbose:+v} "$1" ;;
+        *.rar) unrar &> /dev/null \
+            && unrar ${${verbose:+v}:-l} "$1" \
+            || rar ${${verbose:+v}:-l} "$1" ;;
+        *.7z) 7za l "$1" ;;
+        *) >&2 echo "$0: cannot list: $1"
+            success=1
+            ;;
+    esac
+
     shift
-    continue
-  fi
-
-  case "$1:l" in
-    (*.tar.gz|*.tgz) tar t${verbose:+v}vzf "$1" ;;
-    (*.tar.bz2|*.tbz|*.tbz2) tar t${verbose:+v}jf "$1" ;;
-    (*.tar.xz|*.txz) tar --xz --help &> /dev/null \
-      && tar --xz -t${verbose:+v}f "$1" \
-      || xzcat "$1" | tar t${verbose:+v}f - ;;
-    (*.tar.zma|*.tlz) tar --lzma --help &> /dev/null \
-      && tar --lzma -t${verbose:+v}f "$1" \
-      || lzcat "$1" | tar x${verbose:+v}f - ;;
-    (*.tar) tar t${verbose:+v}f "$1" ;;
-    (*.zip) unzip -l${verbose:+v} "$1" ;;
-    (*.rar) unrar &> /dev/null \
-      && unrar ${${verbose:+v}:-l} "$1" \
-      || rar ${${verbose:+v}:-l} "$1" ;;
-    (*.7z) 7za l "$1" ;;
-    (*)
-      print "$0: cannot list: $1" >&2
-      success=1
-    ;;
-  esac
-
-  shift
 done