[FEAT] Allow non-explicit push options

- Currently the parsing of the push options require that `=` is present
in the value, however we shouldn't be that strict and assume if that's
not set the value is `true`.
- This allow for more natural commands, so become `-o force-push=true`
simply `-o force-push`.
- Add unit test.

cmd/hook_test.go

@@ -15,6 +15,7 @@ import (
 	"testing"
 	"time"
 
+	"code.gitea.io/gitea/modules/private"
 	"code.gitea.io/gitea/modules/setting"
 	"code.gitea.io/gitea/modules/test"
 
@@ -162,3 +163,17 @@ func TestDelayWriter(t *testing.T) {
 		require.Empty(t, out)
 	})
 }
+
+func TestPushOptions(t *testing.T) {
+	require.NoError(t, os.Setenv(private.GitPushOptionCount, "3"))
+	require.NoError(t, os.Setenv("GIT_PUSH_OPTION_0", "force-push"))
+	require.NoError(t, os.Setenv("GIT_PUSH_OPTION_1", "option=value"))
+	require.NoError(t, os.Setenv("GIT_PUSH_OPTION_2", "option-double=another=value"))
+	require.NoError(t, os.Setenv("GIT_PUSH_OPTION_3", "not=valid"))
+
+	assert.Equal(t, map[string]string{
+		"force-push":    "true",
+		"option":        "value",
+		"option-double": "another=value",
+	}, pushOptions())
+}