funcs

var FileFunc = function.New(&function.Spec{
	Params: []function.Parameter{
		{
			Name: "path",
			Type: cty.String,
		},
	},
	Type: function.StaticReturnType(cty.String),
	Impl: func(args []cty.Value, retType cty.Type) (cty.Value, error) {
		f, err := os.ReadFile(args[0].AsString())

		return cty.StringVal(string(f)), err
	},
})

var JoinPathFunc = function.New(&function.Spec{
	Params: []function.Parameter{
		{
			Name: "root",
			Type: cty.String,
		},
		{
			Name: "path",
			Type: cty.String,
		},
	},
	Type: function.StaticReturnType(cty.String),
	Impl: func(args []cty.Value, retType cty.Type) (cty.Value, error) {
		return cty.StringVal(filepath.ToSlash(filepath.Join(
			args[0].AsString(), args[1].AsString()),
		)), nil
	},
})

var SemverConstraint = function.New(&function.Spec{
	Params: []function.Parameter{
		{
			Name: "version",
			Type: cty.String,
		},
		{
			Name: "constraint",
			Type: cty.String,
		},
	},
	Type: function.StaticReturnType(cty.Bool),
	Impl: func(args []cty.Value, retType cty.Type) (cty.Value, error) {
		version, constraint := args[0].AsString(), args[1].AsString()

		v, err := semver.NewVersion(version)
		if err != nil {
			return cty.NullVal(cty.Bool), err
		}

		c, err := semver.NewConstraint(constraint)
		if err != nil {
			return cty.NullVal(cty.Bool), err
		}

		return cty.BoolVal(c.Check(v)), nil
	},
})