bash : archive : improve completion.

.README.md

@@ -322,6 +322,7 @@ Command|Description
 ---|---
 `_autocomplete <ARGS>`|Provide completion based on provided arguments separated by spaces.
 `_autocomplete_first <ARGS>`|Same as `_autocomplete` but works only once for first argument.
+`_autocomplete_grep <PATTERN>`|Ls autocomplete with specified grep filter.
 `_autocomplete_nested`|Provides nested completions, just like `sudo` does.
 
 ## Battery.

.linux/bash/module/archive.sh

@@ -1,3 +1,5 @@
+_ARCHIVE_PATTERN="_[[:alnum:]]{40}.tar.[xg]z"
+
 # archive file with maximum compression and checksum.
 # usage: archive [FILES]
 archive()
@@ -71,7 +73,7 @@ archive_check()
 
   # set dafult value to target all supported archives.
   if [[ "${targets}" = "" ]]; then
-    targets=(*_*.tar.*)
+    targets=(${_ARCHIVE_PATTERN})
     total=${#targets[@]}
   fi
 
@@ -122,7 +124,7 @@ unarchive()
   
   # set dafult value to target all supported archives.
   if [[ "${targets}" = "" ]]; then
-    targets=(*_*.tar.*)
+    targets=(${_ARCHIVE_PATTERN})
     total=${#targets[@]}
   fi
 
@@ -162,7 +164,7 @@ archive_name()
 
   # set dafult value to target all supported archives.
   if [[ "${targets}" = "" ]]; then
-    targets=(*_*.tar.*)
+    targets=(${_ARCHIVE_PATTERN})
     total=${#targets[@]}
   fi
 
@@ -217,7 +219,7 @@ _archive_name()
   local command="${COMP_WORDS[0]}"
 
   if [[ "${prev}" = "${command}" ]]; then
-    COMPREPLY=( $(compgen -W "$(ls *_*.tar.*)" -- ${cur}) )
+    COMPREPLY=( $(compgen -W "$(ls | grep -E ${_ARCHIVE_PATTERN})" -- ${cur}) )
     return 0
   else
     local name="${prev%_*}"
@@ -226,5 +228,10 @@ _archive_name()
   fi
 }
 
-complete -f -X "!*_*.tar.*" archive_check unarchive
+_archive_grep()
+{
+  _autocomplete_grep ${_ARCHIVE_PATTERN}
+}
+
+complete -F _archive_grep archive_check unarchive
 complete -F _archive_name archive_name

.linux/bash/module/autocomplete.sh

@@ -32,6 +32,19 @@ _autocomplete_first()
   fi
 }
 
+_autocomplete_grep()
+{
+  COMPREPLY=()
+
+  local pattern="${1}"
+  local cur="${COMP_WORDS[COMP_CWORD]}"
+  local prev="${COMP_WORDS[COMP_CWORD-1]}"
+  local command="${COMP_WORDS[0]}"
+
+  COMPREPLY=( $(compgen -W "$(ls | grep -E ${pattern})" -- ${cur}) )
+  return 0
+}
+
 # autocomplete nested program.
 _autocomplete_nested()
 {