You can use CLI cmd to check supported golang template funcs
Ξ ▶ up assist upcmd_template_func
-assist: upcmd_template_func
=List of upcmd template funcs
catLines : (func(string) string)(0x174a230)
deReg : (func(string) string)(0x174a8b0)
OS : (func() string)(0x174a1f0)
ARCH : (func() string)(0x174a210)
fromSlash : (func(string) string)(0x174a3f0)
toSlash : (func(string) string)(0x174a410)
printObj : (func(interface {}) string)(0x174a4a0)
ymlToObj : (func(string) interface {})(0x174a650)
reg : (func(string, interface {}) string)(0x174a710)
now : (func() string)(0x174a430)
pathExisted : (func(string) bool)(0x174a9a0)
validateMandatoryFailIfNone : (func(string, string) string)(0x174af20)
splitLines : (func(string) []string)(0x174a310)
objToYml : (func(interface {}) string)(0x174a570)
fileContent : (func(string) string)(0x174aad0)