57 lines
1.4 KiB
Go
57 lines
1.4 KiB
Go
package tfdiags
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import (
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"bytes"
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"fmt"
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"strconv"
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"github.com/zclconf/go-cty/cty"
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)
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// FormatCtyPath is a helper function to produce a user-friendly string
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// representation of a cty.Path. The result uses a syntax similar to the
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// HCL expression language in the hope of it being familiar to users.
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func FormatCtyPath(path cty.Path) string {
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var buf bytes.Buffer
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for _, step := range path {
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switch ts := step.(type) {
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case cty.GetAttrStep:
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fmt.Fprintf(&buf, ".%s", ts.Name)
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case cty.IndexStep:
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buf.WriteByte('[')
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key := ts.Key
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keyTy := key.Type()
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switch {
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case key.IsNull():
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buf.WriteString("null")
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case !key.IsKnown():
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buf.WriteString("(not yet known)")
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case keyTy == cty.Number:
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bf := key.AsBigFloat()
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buf.WriteString(bf.Text('g', -1))
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case keyTy == cty.String:
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buf.WriteString(strconv.Quote(key.AsString()))
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default:
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buf.WriteString("...")
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}
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buf.WriteByte(']')
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}
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}
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return buf.String()
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}
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// FormatError is a helper function to produce a user-friendly string
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// representation of certain special error types that we might want to
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// include in diagnostic messages.
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//
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// This currently has special behavior only for cty.PathError, where a
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// non-empty path is rendered in a HCL-like syntax as context.
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func FormatError(err error) string {
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perr, ok := err.(cty.PathError)
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if !ok || len(perr.Path) == 0 {
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return err.Error()
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}
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return fmt.Sprintf("%s: %s", FormatCtyPath(perr.Path), perr.Error())
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}
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