Make git push options accept short name (#32245)

Just like what most CLI parsers do: `--opt` means `opt=true`

Then users could use `-o force-push` as `-o force-push=true`

modules/private/pushoptions.go

@@ -0,0 +1,45 @@
+// Copyright 2024 The Gitea Authors. All rights reserved.
+// SPDX-License-Identifier: MIT
+
+package private
+
+import (
+	"strconv"
+	"strings"
+
+	"code.gitea.io/gitea/modules/optional"
+)
+
+// GitPushOptions is a wrapper around a map[string]string
+type GitPushOptions map[string]string
+
+// GitPushOptions keys
+const (
+	GitPushOptionRepoPrivate  = "repo.private"
+	GitPushOptionRepoTemplate = "repo.template"
+	GitPushOptionForcePush    = "force-push"
+)
+
+// Bool checks for a key in the map and parses as a boolean
+// An option without value is considered true, eg: "-o force-push" or "-o repo.private"
+func (g GitPushOptions) Bool(key string) optional.Option[bool] {
+	if val, ok := g[key]; ok {
+		if val == "" {
+			return optional.Some(true)
+		}
+		if b, err := strconv.ParseBool(val); err == nil {
+			return optional.Some(b)
+		}
+	}
+	return optional.None[bool]()
+}
+
+// AddFromKeyValue adds a key value pair to the map by "key=value" format or "key" for empty value
+func (g GitPushOptions) AddFromKeyValue(line string) {
+	kv := strings.SplitN(line, "=", 2)
+	if len(kv) == 2 {
+		g[kv[0]] = kv[1]
+	} else {
+		g[kv[0]] = ""
+	}
+}