cloudflare/pint
Publicmirrored from https://github.com/cloudflare/pintAvailable
internal/parser/decode.go
41lines · modecode
| 1 | package parser |
| 2 | |
| 3 | import ( |
| 4 | "errors" |
| 5 | |
| 6 | promparser "github.com/prometheus/prometheus/promql/parser" |
| 7 | ) |
| 8 | |
| 9 | func DecodeExpr(expr string) (*PromQLNode, error) { |
| 10 | node, err := promparser.ParseExpr(expr) |
| 11 | if err != nil { |
| 12 | pqe := PromQLError{Err: err} |
| 13 | pqe.node = &PromQLNode{ |
| 14 | Expr: expr, |
| 15 | Node: node, |
| 16 | } |
| 17 | var perrs promparser.ParseErrors |
| 18 | if ok := errors.As(err, &perrs); ok { |
| 19 | for _, perr := range perrs { |
| 20 | pqe.Err = perr.Err |
| 21 | pqe.node.Expr = perr.Query |
| 22 | } |
| 23 | } |
| 24 | return nil, pqe |
| 25 | } |
| 26 | |
| 27 | pn := PromQLNode{ |
| 28 | Expr: expr, |
| 29 | Node: node, |
| 30 | } |
| 31 | |
| 32 | for _, child := range promparser.Children(node) { |
| 33 | c, err := DecodeExpr(child.String()) |
| 34 | if err != nil { |
| 35 | return nil, err |
| 36 | } |
| 37 | pn.Children = append(pn.Children, c) |
| 38 | } |
| 39 | |
| 40 | return &pn, nil |
| 41 | } |
| 42 | |