75 lines
2 KiB
Go
75 lines
2 KiB
Go
package hclutils
|
|
|
|
import (
|
|
"bytes"
|
|
"fmt"
|
|
|
|
"github.com/hashicorp/hcl2/hcl"
|
|
hjson "github.com/hashicorp/hcl2/hcl/json"
|
|
"github.com/hashicorp/hcl2/hcldec"
|
|
"github.com/hashicorp/nomad/nomad/structs"
|
|
"github.com/ugorji/go/codec"
|
|
"github.com/zclconf/go-cty/cty"
|
|
"github.com/zclconf/go-cty/cty/function"
|
|
"github.com/zclconf/go-cty/cty/function/stdlib"
|
|
)
|
|
|
|
// ParseHclInterface is used to convert an interface value representing a hcl2
|
|
// body and return the interpolated value. Vars may be nil if there are no
|
|
// variables to interpolate.
|
|
func ParseHclInterface(val interface{}, spec hcldec.Spec, vars map[string]cty.Value) (cty.Value, hcl.Diagnostics) {
|
|
evalCtx := &hcl.EvalContext{
|
|
Variables: vars,
|
|
Functions: GetStdlibFuncs(),
|
|
}
|
|
|
|
// Encode to json
|
|
var buf bytes.Buffer
|
|
enc := codec.NewEncoder(&buf, structs.JsonHandle)
|
|
err := enc.Encode(val)
|
|
if err != nil {
|
|
// Convert to a hcl diagnostics message
|
|
return cty.NilVal, hcl.Diagnostics([]*hcl.Diagnostic{
|
|
{
|
|
Severity: hcl.DiagError,
|
|
Summary: "Failed to JSON encode value",
|
|
Detail: fmt.Sprintf("JSON encoding failed: %v", err),
|
|
}})
|
|
}
|
|
|
|
// Parse the json as hcl2
|
|
hclFile, diag := hjson.Parse(buf.Bytes(), "")
|
|
if diag.HasErrors() {
|
|
return cty.NilVal, diag
|
|
}
|
|
|
|
value, decDiag := hcldec.Decode(hclFile.Body, spec, evalCtx)
|
|
diag = diag.Extend(decDiag)
|
|
if diag.HasErrors() {
|
|
return cty.NilVal, diag
|
|
}
|
|
|
|
return value, diag
|
|
}
|
|
|
|
// GetStdlibFuncs returns the set of stdlib functions.
|
|
func GetStdlibFuncs() map[string]function.Function {
|
|
return map[string]function.Function{
|
|
"abs": stdlib.AbsoluteFunc,
|
|
"coalesce": stdlib.CoalesceFunc,
|
|
"concat": stdlib.ConcatFunc,
|
|
"hasindex": stdlib.HasIndexFunc,
|
|
"int": stdlib.IntFunc,
|
|
"jsondecode": stdlib.JSONDecodeFunc,
|
|
"jsonencode": stdlib.JSONEncodeFunc,
|
|
"length": stdlib.LengthFunc,
|
|
"lower": stdlib.LowerFunc,
|
|
"max": stdlib.MaxFunc,
|
|
"min": stdlib.MinFunc,
|
|
"reverse": stdlib.ReverseFunc,
|
|
"strlen": stdlib.StrlenFunc,
|
|
"substr": stdlib.SubstrFunc,
|
|
"upper": stdlib.UpperFunc,
|
|
}
|
|
}
|