69 lines
1.9 KiB
Go
69 lines
1.9 KiB
Go
package hclutils
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import (
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"bytes"
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"fmt"
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"github.com/hashicorp/hcl2/hcl"
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hjson "github.com/hashicorp/hcl2/hcl/json"
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"github.com/hashicorp/hcl2/hcldec"
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"github.com/hashicorp/nomad/nomad/structs"
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"github.com/ugorji/go/codec"
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"github.com/zclconf/go-cty/cty"
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"github.com/zclconf/go-cty/cty/function"
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"github.com/zclconf/go-cty/cty/function/stdlib"
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)
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// ParseHclInterface is used to convert an interface value representing a hcl2
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// body and return the interpolated value.
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func ParseHclInterface(val interface{}, spec hcldec.Spec, ctx *hcl.EvalContext) (cty.Value, hcl.Diagnostics) {
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// Encode to json
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var buf bytes.Buffer
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enc := codec.NewEncoder(&buf, structs.JsonHandle)
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err := enc.Encode(val)
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if err != nil {
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// Convert to a hcl diagnostics message
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return cty.NilVal, hcl.Diagnostics([]*hcl.Diagnostic{
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{
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Severity: hcl.DiagError,
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Summary: "Failed to JSON encode value",
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Detail: fmt.Sprintf("JSON encoding failed: %v", err),
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}})
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}
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// Parse the json as hcl2
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hclFile, diag := hjson.Parse(buf.Bytes(), "")
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if diag.HasErrors() {
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return cty.NilVal, diag
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}
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value, decDiag := hcldec.Decode(hclFile.Body, spec, ctx)
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diag = diag.Extend(decDiag)
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if diag.HasErrors() {
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return cty.NilVal, diag
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}
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return value, diag
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}
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// GetStdlibFuncs returns the set of stdlib functions.
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func GetStdlibFuncs() map[string]function.Function {
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return map[string]function.Function{
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"abs": stdlib.AbsoluteFunc,
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"coalesce": stdlib.CoalesceFunc,
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"concat": stdlib.ConcatFunc,
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"hasindex": stdlib.HasIndexFunc,
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"int": stdlib.IntFunc,
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"jsondecode": stdlib.JSONDecodeFunc,
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"jsonencode": stdlib.JSONEncodeFunc,
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"length": stdlib.LengthFunc,
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"lower": stdlib.LowerFunc,
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"max": stdlib.MaxFunc,
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"min": stdlib.MinFunc,
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"reverse": stdlib.ReverseFunc,
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"strlen": stdlib.StrlenFunc,
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"substr": stdlib.SubstrFunc,
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"upper": stdlib.UpperFunc,
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}
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}
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