terraform/lang/functions.go

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package lang
import (
"fmt"
"github.com/zclconf/go-cty/cty"
"github.com/zclconf/go-cty/cty/function"
"github.com/zclconf/go-cty/cty/function/stdlib"
)
var impureFunctions = []string{
"timestamp",
"uuid",
}
// Functions returns the set of functions that should be used to when evaluating
// expressions in the receiving scope.
func (s *Scope) Functions() map[string]function.Function {
s.funcsLock.Lock()
if s.funcs == nil {
s.funcs = map[string]function.Function{
"abs": stdlib.AbsoluteFunc,
"basename": unimplFunc, // TODO
"base64decode": unimplFunc, // TODO
"base64encode": unimplFunc, // TODO
"base64gzip": unimplFunc, // TODO
"base64sha256": unimplFunc, // TODO
"base64sha512": unimplFunc, // TODO
"bcrypt": unimplFunc, // TODO
"ceil": unimplFunc, // TODO
"chomp": unimplFunc, // TODO
"cidrhost": unimplFunc, // TODO
"cidrnetmask": unimplFunc, // TODO
"cidrsubnet": unimplFunc, // TODO
"coalesce": stdlib.CoalesceFunc,
"coalescelist": unimplFunc, // TODO
"compact": unimplFunc, // TODO
"concat": stdlib.ConcatFunc,
"contains": unimplFunc, // TODO
"csvdecode": stdlib.CSVDecodeFunc,
"dirname": unimplFunc, // TODO
"distinct": unimplFunc, // TODO
"element": unimplFunc, // TODO
"chunklist": unimplFunc, // TODO
"file": unimplFunc, // TODO
"matchkeys": unimplFunc, // TODO
"flatten": unimplFunc, // TODO
"floor": unimplFunc, // TODO
"format": stdlib.FormatFunc,
"formatlist": stdlib.FormatListFunc,
"indent": unimplFunc, // TODO
"index": unimplFunc, // TODO
"join": unimplFunc, // TODO
"jsondecode": stdlib.JSONDecodeFunc,
"jsonencode": stdlib.JSONEncodeFunc,
"length": unimplFunc, // TODO
"list": unimplFunc, // TODO
"log": unimplFunc, // TODO
"lower": stdlib.LowerFunc,
"map": unimplFunc, // TODO
"max": stdlib.MaxFunc,
"md5": unimplFunc, // TODO
"merge": unimplFunc, // TODO
"min": stdlib.MinFunc,
"pathexpand": unimplFunc, // TODO
"pow": unimplFunc, // TODO
"replace": unimplFunc, // TODO
"rsadecrypt": unimplFunc, // TODO
"sha1": unimplFunc, // TODO
"sha256": unimplFunc, // TODO
"sha512": unimplFunc, // TODO
"signum": unimplFunc, // TODO
"slice": unimplFunc, // TODO
"sort": unimplFunc, // TODO
"split": unimplFunc, // TODO
"substr": stdlib.SubstrFunc,
"timestamp": unimplFunc, // TODO
"timeadd": unimplFunc, // TODO
"title": unimplFunc, // TODO
"transpose": unimplFunc, // TODO
"trimspace": unimplFunc, // TODO
"upper": stdlib.UpperFunc,
"urlencode": unimplFunc, // TODO
"uuid": unimplFunc, // TODO
"zipmap": unimplFunc, // TODO
}
if s.PureOnly {
// Force our few impure functions to return unknown so that we
// can defer evaluating them until a later pass.
for _, name := range impureFunctions {
s.funcs[name] = function.Unpredictable(s.funcs[name])
}
}
}
s.funcsLock.Unlock()
return s.funcs
}
var unimplFunc = function.New(&function.Spec{
Type: func([]cty.Value) (cty.Type, error) {
return cty.DynamicPseudoType, fmt.Errorf("function not yet implemented")
},
Impl: func([]cty.Value, cty.Type) (cty.Value, error) {
return cty.DynamicVal, fmt.Errorf("function not yet implemented")
},
})