Add _split_longopt() helper for improved handling of long options that take arguments in both "--foo bar" and "--foo=bar" formats.

CHANGES

@@ -32,6 +32,8 @@ bash-completion (1.x)
   * Use POSIX compliant arguments to tail in mkisofs completion.
   * Protect various completions from unusual user input by not embedding the
     input in external command arguments.
+  * Add _split_longopt() helper for improved handling of long options that
+    take arguments in both "--foo bar" and "--foo=bar" formats.
 
   [ Todd Zullinger ]
   * Make yum complete on filenames after install, deplist, update and upgrade

bash_completion

@@ -317,6 +317,23 @@ _filedir()
 	COMPREPLY=( "${COMPREPLY[@]}" "${toks[@]}" )
 }
 
+# This function splits $cur=--foo=bar into $prev=--foo, $cur=bar, making it
+# easier to support both "--foo bar" and "--foo=bar" style completions.
+# Returns 0 if current option was split, 1 otherwise.
+#
+_split_longopt()
+{
+	if [[ "$cur" == --?*=* ]]; then
+		# Cut also backslash before '=' in case it ended up there
+		# for some reason.
+		prev="${cur%%?(\\)=*}"
+		cur="${cur#*=}"
+		return 0
+	fi
+
+	return 1
+}
+
 # This function tries to parse the output of $command --help
 #
 _parse_help() {