value of a container option (e.g. array) is reset to empty on first specification

cli_test.go

@@ -85,13 +85,14 @@ where:
   <dest>  Output destination file
   <report>  Optional report file
   <options>
+    -V, --verbose                   Print verbose output (default: "0")
     -o, --print-ocr                 Print the OCR output to stderr
     -s, --save-clip                 Save the image clips as PNG files (alias: save-clips)
     -t, --trace                     Enable trace mode for detailed logging
     -p, --page(s) <num>["," ...]    Process only the specified pages (comma-separated list)
     -c, --config <file>             Alternate configuration file
     -l, --log(s) <string>["," ...]  Logging options (comma-separated list)
-    -V, --var(s) <key=value>["," ...]  Define one or more comma separated variables for the actions context (multiple allowed)
+    --var(s) <key=value>["," ...]   Define one or more comma separated variables for the actions context (multiple allowed)
     -n, --input-name <string>       Input file name when source comes from stdin
     -d, --work-dir <dir>            Work directory
     --attempts <num>                Attempts for retrying failed operations (default: "1")

opt-base.go

@@ -13,6 +13,7 @@ type cliOptionBase struct {
 	description      string
 	isArray          bool
 	hidden           bool
+	alreadySeen      bool
 	specialValues    map[string]SpecialValueFunc
 	incompatibleWith []string
 }

opt-int-array.go

@@ -76,6 +76,10 @@ func (opt *cliOptionIntArray) parse(parser cliParser, argIndex int, valuePtr *st
 						err = errInvalidOptionValue(opt.name, boxedValue, "num-array")
 					}
 				} else {
+					if !opt.alreadySeen {
+						*opt.targetVar = []int{}
+						opt.alreadySeen = true
+					}
 					for value := range strings.SplitSeq(optValue, ",") {
 						var minRange, maxRange int
 						if minRange, maxRange, err = parseIntRange(value); err == nil {

opt-string-array.go

@@ -55,6 +55,8 @@ func (opt *cliOptionStringArray) parse(parser cliParser, argIndex int, valuePtr
 					} else {
 						err = errInvalidOptionValue(opt.name, boxedValue, "array of string")
 					}
+				} else if opt.alreadySeen {
+					*opt.targetVar = append(*opt.targetVar, strings.Split(value, ",")...)
 				} else {
 					*opt.targetVar = strings.Split(value, ",")
 				}

opt-string-map.go

@@ -71,7 +71,7 @@ func (opt *cliOptionStringMap) parse(parser cliParser, argIndex int, valuePtr *s
 						err = errInvalidOptionValue(opt.name, boxedValue, "map of string")
 					}
 				} else {
-					if dict == nil {
+					if dict == nil || !opt.alreadySeen {
 						dict = make(map[string]string)
 					}
 					for value := range strings.SplitSeq(value, ",") {