dotcloud/docker

//go:build !windows

package dockerfile // import "github.com/docker/docker/builder/dockerfile"

import (
    "errors"
    "os"
    "path/filepath"

    "github.com/docker/docker/api/types/container"
    "github.com/moby/buildkit/frontend/dockerfile/instructions"
)

// normalizeWorkdir normalizes a user requested working directory in a
// platform semantically consistent way.
func normalizeWorkdir(_ string, current string, requested string) (string, error) {
    if requested == "" {
        return "", errors.New("cannot normalize nothing")
    }
    current = filepath.FromSlash(current)
    requested = filepath.FromSlash(requested)
    if !filepath.IsAbs(requested) {
        return filepath.Join(string(os.PathSeparator), current, requested), nil
    }
    return filepath.Clean(requested), nil
}

// resolveCmdLine takes a command line arg set and optionally prepends a platform-specific
// shell in front of it.
func resolveCmdLine(cmd instructions.ShellDependantCmdLine, runConfig *container.Config, os, _, _ string) ([]string, bool) {
    result := cmd.CmdLine
    if cmd.PrependShell && result != nil {
        result = append(getShell(runConfig, os), result...)
    }
    return result, false
}