zabio3/godolint

package rules

import (
    "strings"

    "github.com/moby/buildkit/frontend/dockerfile/parser"
)

// validateDL4006 Set the `SHELL` option -o pipefail before `RUN` with a pipe in it
func validateDL4006(node *parser.Node) (rst []ValidateResult, err error) {
    var isShellPipeFail bool
    for _, child := range node.Children {
        switch child.Value {
        case SHELL:
            isShellPipeFail = true
        case RUN:
            var isInQuote bool
            for _, v := range strings.Fields(child.Next.Value) {
                switch v {
                case "|":
                    if !isInQuote && !isShellPipeFail {
                        rst = append(rst, ValidateResult{line: child.StartLine})
                    }
                default:
                    if strings.HasPrefix(v, "'") {
                        isInQuote = true
                    }
                    if strings.HasSuffix(v, "'") {
                        isInQuote = false
                    }
                }
            }
        }
    }
    return rst, nil
}