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package pkglint
import "gopkg.in/check.v1"
func (s *Suite) Test_Var_ConstantValue__assign(c *check.C) {
t := s.Init(c)
v := NewVar("VARNAME")
v.Write(t.NewMkLine("write.mk", 123, "VARNAME=\tvalue"), false)
t.Check(v.ConstantValue(), equals, "value")
v.Write(t.NewMkLine("write.mk", 124, "VARNAME=\toverwritten"), false)
t.Check(v.ConstantValue(), equals, "overwritten")
}
// Variables that reference other variable are considered constants.
// Even if these referenced variables change their value in-between,
// this does not affect the constant-ness of this variable, since the
// references are resolved lazily.
func (s *Suite) Test_Var_ConstantValue__assign_reference(c *check.C) {
t := s.Init(c)
v := NewVar("VARNAME")
v.Write(t.NewMkLine("write.mk", 123, "VARNAME=\tvalue"), false)
t.Check(v.ConstantValue(), equals, "value")
v.Write(t.NewMkLine("write.mk", 124, "VARNAME=\t${OTHER}"), false)
t.Check(v.Constant(), equals, true)
}
func (s *Suite) Test_Var_ConstantValue__assign_eval_reference(c *check.C) {
t := s.Init(c)
v := NewVar("VARNAME")
v.Write(t.NewMkLine("write.mk", 123, "VARNAME=\tvalue"), false)
t.Check(v.ConstantValue(), equals, "value")
v.Write(t.NewMkLine("write.mk", 124, "VARNAME:=\t${OTHER}"), false)
// To analyze this case correctly, pkglint would have to know
// the current value of ${OTHER} in line 124. For that it would
// need the complete scope including all other variables.
//
// As of March 2019 this is not implemented, therefore pkglint
// doesn't treat the variable as constant, to prevent wrong warnings.
t.Check(v.Constant(), equals, false)
}
func (s *Suite) Test_Var_ConstantValue__assign_conditional(c *check.C) {
t := s.Init(c)
v := NewVar("VARNAME")
t.Check(v.ConditionalVars(), check.IsNil)
v.Write(t.NewMkLine("write.mk", 123, "VARNAME=\tconditional"), true, "OPSYS")
t.Check(v.Constant(), equals, false)
}
func (s *Suite) Test_Var_ConstantValue__default(c *check.C) {
t := s.Init(c)
v := NewVar("VARNAME")
v.Write(t.NewMkLine("write.mk", 123, "VARNAME?=\tvalue"), false)
t.Check(v.ConstantValue(), equals, "value")
v.Write(t.NewMkLine("write.mk", 124, "VARNAME?=\tignored"), false)
t.Check(v.ConstantValue(), equals, "value")
}
func (s *Suite) Test_Var_ConstantValue__eval_then_default(c *check.C) {
t := s.Init(c)
v := NewVar("VARNAME")
v.Write(t.NewMkLine("buildlink3.mk", 123, "VARNAME:=\tvalue"), false)
t.Check(v.ConstantValue(), equals, "value")
v.Write(t.NewMkLine("builtin.mk", 124, "VARNAME?=\tignored"), false)
t.Check(v.ConstantValue(), equals, "value")
}
func (s *Suite) Test_Var_ConstantValue__append(c *check.C) {
t := s.Init(c)
v := NewVar("VARNAME")
v.Write(t.NewMkLine("write.mk", 123, "VARNAME+=\tvalue"), false)
t.Check(v.ConstantValue(), equals, " value")
v.Write(t.NewMkLine("write.mk", 124, "VARNAME+=\tappended"), false)
t.Check(v.ConstantValue(), equals, " value appended")
}
func (s *Suite) Test_Var_ConstantValue__eval(c *check.C) {
t := s.Init(c)
v := NewVar("VARNAME")
v.Write(t.NewMkLine("write.mk", 123, "VARNAME:=\tvalue"), false)
t.Check(v.ConstantValue(), equals, "value")
v.Write(t.NewMkLine("write.mk", 124, "VARNAME:=\toverwritten"), false)
t.Check(v.ConstantValue(), equals, "overwritten")
}
// Variables that are based on running shell commands are never constant.
func (s *Suite) Test_Var_ConstantValue__shell(c *check.C) {
t := s.Init(c)
v := NewVar("VARNAME")
v.Write(t.NewMkLine("write.mk", 123, "VARNAME=\tvalue"), false)
t.Check(v.ConstantValue(), equals, "value")
v.Write(t.NewMkLine("write.mk", 124, "VARNAME!=\techo hello"), false)
t.Check(v.Constant(), equals, false)
}
func (s *Suite) Test_Var_ConstantValue__referenced_before(c *check.C) {
t := s.Init(c)
v := NewVar("VARNAME")
// Since the value of VARNAME escapes here, the value is not
// guaranteed to be the same in all evaluations of ${VARNAME}.
// For example, OTHER may be used at load time in an .if
// condition.
v.Read(t.NewMkLine("readwrite.mk", 123, "OTHER=\t${VARNAME}"))
t.Check(v.Constant(), equals, false)
v.Write(t.NewMkLine("readwrite.mk", 124, "VARNAME=\tvalue"), false)
t.Check(v.Constant(), equals, false)
}
func (s *Suite) Test_Var_ConstantValue__referenced_in_between(c *check.C) {
t := s.Init(c)
v := NewVar("VARNAME")
v.Write(t.NewMkLine("readwrite.mk", 123, "VARNAME=\tvalue"), false)
t.Check(v.ConstantValue(), equals, "value")
// Since the value of VARNAME escapes here, the value is not
// guaranteed to be the same in all evaluations of ${VARNAME}.
// For example, OTHER may be used at load time in an .if
// condition.
v.Read(t.NewMkLine("readwrite.mk", 124, "OTHER=\t${VARNAME}"))
t.Check(v.ConstantValue(), equals, "value")
v.Write(t.NewMkLine("write.mk", 125, "VARNAME=\toverwritten"), false)
t.Check(v.Constant(), equals, false)
}
func (s *Suite) Test_Var_ConditionalVars(c *check.C) {
t := s.Init(c)
v := NewVar("VARNAME")
t.Check(v.Conditional(), equals, false)
t.Check(v.ConditionalVars(), check.IsNil)
v.Write(t.NewMkLine("write.mk", 123, "VARNAME=\tconditional"), true, "OPSYS")
t.Check(v.Constant(), equals, false)
t.Check(v.Conditional(), equals, true)
t.Check(v.ConditionalVars(), deepEquals, []string{"OPSYS"})
v.Write(t.NewMkLine("write.mk", 124, "VARNAME=\tconditional"), true, "OPSYS")
t.Check(v.Conditional(), equals, true)
t.Check(v.ConditionalVars(), deepEquals, []string{"OPSYS"})
}
func (s *Suite) Test_Var_Value__initial_conditional_write(c *check.C) {
t := s.Init(c)
v := NewVar("VARNAME")
v.Write(t.NewMkLine("write.mk", 124, "VARNAME:=\toverwritten conditionally"), true, "OPSYS")
// Since there is no previous value, the simplest choice is to just
// take the first seen value, no matter if that value is conditional
// or not.
t.Check(v.Conditional(), equals, true)
t.Check(v.Constant(), equals, false)
t.Check(v.Value(), equals, "overwritten conditionally")
}
func (s *Suite) Test_Var_Value__conditional_write_after_unconditional(c *check.C) {
t := s.Init(c)
v := NewVar("VARNAME")
v.Write(t.NewMkLine("write.mk", 123, "VARNAME=\tvalue"), false)
t.Check(v.Value(), equals, "value")
v.Write(t.NewMkLine("write.mk", 124, "VARNAME+=\tappended"), false)
t.Check(v.Value(), equals, "value appended")
v.Write(t.NewMkLine("write.mk", 124, "VARNAME:=\toverwritten conditionally"), true, "OPSYS")
// When there is a previous value, it's probably best to keep
// that value since this way the following code results in the
// most generic value:
// VAR= generic
// .if ${OPSYS} == NetBSD
// VAR= specific
// .endif
// The value stays the same, still it is marked as conditional and therefore
// not constant anymore.
t.Check(v.Conditional(), equals, true)
t.Check(v.Constant(), equals, false)
t.Check(v.Value(), equals, "value appended")
}
func (s *Suite) Test_Var_Value__infrastructure(c *check.C) {
t := s.Init(c)
v := NewVar("VARNAME")
v.Write(t.NewMkLine(t.File("write.mk"), 123, "VARNAME=\tvalue"), false)
t.Check(v.Value(), equals, "value")
v.Write(t.NewMkLine(t.File("mk/write.mk"), 123, "VARNAME=\tinfra"), false)
t.Check(v.Value(), equals, "value")
v.Write(t.NewMkLine(t.File("wip/mk/write.mk"), 123, "VARNAME=\twip infra"), false)
t.Check(v.Value(), equals, "value")
}
func (s *Suite) Test_Var_ValueInfra(c *check.C) {
t := s.Init(c)
v := NewVar("VARNAME")
v.Write(t.NewMkLine(t.File("write.mk"), 123, "VARNAME=\tvalue"), false)
t.Check(v.ValueInfra(), equals, "value")
v.Write(t.NewMkLine(t.File("mk/write.mk"), 123, "VARNAME=\tinfra"), false)
t.Check(v.ValueInfra(), equals, "infra")
v.Write(t.NewMkLine(t.File("wip/mk/write.mk"), 123, "VARNAME=\twip infra"), false)
t.Check(v.ValueInfra(), equals, "wip infra")
}
func (s *Suite) Test_Var_ReadLocations(c *check.C) {
t := s.Init(c)
v := NewVar("VAR")
t.Check(v.ReadLocations(), check.IsNil)
mkline123 := t.NewMkLine("read.mk", 123, "OTHER=\t${VAR}")
v.Read(mkline123)
t.Check(v.ReadLocations(), deepEquals, []MkLine{mkline123})
mkline124 := t.NewMkLine("read.mk", 124, "OTHER=\t${VAR} ${VAR}")
v.Read(mkline124)
v.Read(mkline124)
// For now, count every read of the variable. I'm not yet sure
// whether that's the best way or whether to make the lines unique.
t.Check(v.ReadLocations(), deepEquals, []MkLine{mkline123, mkline124, mkline124})
}
func (s *Suite) Test_Var_WriteLocations(c *check.C) {
t := s.Init(c)
v := NewVar("VAR")
t.Check(v.WriteLocations(), check.IsNil)
mkline123 := t.NewMkLine("write.mk", 123, "VAR=\tvalue")
v.Write(mkline123, false)
t.Check(v.WriteLocations(), deepEquals, []MkLine{mkline123})
// Multiple writes from the same line may happen because of a .for loop.
mkline125 := t.NewMkLine("write.mk", 125, "VAR+=\t${var}")
v.Write(mkline125, false)
v.Write(mkline125, false)
// For now, count every write of the variable. I'm not yet sure
// whether that's the best way or whether to make the lines unique.
t.Check(v.WriteLocations(), deepEquals, []MkLine{mkline123, mkline125, mkline125})
}
func (s *Suite) Test_Var_Refs(c *check.C) {
t := s.Init(c)
v := NewVar("VAR")
t.Check(v.Refs(), check.IsNil)
// The referenced variables are taken from the mkline.
// They don't need to be passed separately.
v.Write(t.NewMkLine("write.mk", 123, "VAR=${OTHER} ${${OPSYS} == NetBSD :? ${THEN} : ${ELSE}}"), true, "COND")
v.AddRef("FOR")
t.Check(v.Refs(), deepEquals, []string{"OTHER", "OPSYS", "THEN", "ELSE", "COND", "FOR"})
}
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