diff options
Diffstat (limited to 'pkg/util/utils.go')
| -rw-r--r-- | pkg/util/utils.go | 85 |
1 files changed, 66 insertions, 19 deletions
diff --git a/pkg/util/utils.go b/pkg/util/utils.go index 2261934f0..67cb5c24b 100644 --- a/pkg/util/utils.go +++ b/pkg/util/utils.go @@ -4,6 +4,7 @@ import ( "fmt" "os" "path/filepath" + "regexp" "strings" "sync" "time" @@ -16,7 +17,7 @@ import ( "github.com/containers/libpod/pkg/rootless" "github.com/containers/storage" "github.com/containers/storage/pkg/idtools" - "github.com/opencontainers/image-spec/specs-go/v1" + v1 "github.com/opencontainers/image-spec/specs-go/v1" "github.com/pkg/errors" "github.com/sirupsen/logrus" "github.com/spf13/pflag" @@ -69,6 +70,50 @@ func StringInSlice(s string, sl []string) bool { return false } +// ParseChanges returns key, value(s) pair for given option. +func ParseChanges(option string) (key string, vals []string, err error) { + // Supported format as below + // 1. key=value + // 2. key value + // 3. key ["value","value1"] + if strings.Contains(option, " ") { + // This handles 2 & 3 conditions. + var val string + tokens := strings.SplitAfterN(option, " ", 2) + if len(tokens) < 2 { + return "", []string{}, fmt.Errorf("invalid key value %s", option) + } + key = strings.Trim(tokens[0], " ") // Need to trim whitespace part of delimeter. + val = tokens[1] + if strings.Contains(tokens[1], "[") && strings.Contains(tokens[1], "]") { + //Trim '[',']' if exist. + val = strings.TrimLeft(strings.TrimRight(tokens[1], "]"), "[") + } + vals = strings.Split(val, ",") + } else if strings.Contains(option, "=") { + // handles condition 1. + tokens := strings.Split(option, "=") + key = tokens[0] + vals = tokens[1:] + } else { + // either ` ` or `=` must be provided after command + return "", []string{}, fmt.Errorf("invalid format %s", option) + } + + if len(vals) == 0 { + return "", []string{}, errors.Errorf("no value given for instruction %q", key) + } + + for _, v := range vals { + //each option must not have ' '., `[`` or `]` & empty strings + whitespaces := regexp.MustCompile(`[\[\s\]]`) + if whitespaces.MatchString(v) || len(v) == 0 { + return "", []string{}, fmt.Errorf("invalid value %s", v) + } + } + return key, vals, nil +} + // GetImageConfig converts the --change flag values in the format "CMD=/bin/bash USER=example" // to a type v1.ImageConfig func GetImageConfig(changes []string) (v1.ImageConfig, error) { @@ -87,40 +132,42 @@ func GetImageConfig(changes []string) (v1.ImageConfig, error) { exposedPorts := make(map[string]struct{}) volumes := make(map[string]struct{}) labels := make(map[string]string) - for _, ch := range changes { - pair := strings.Split(ch, "=") - if len(pair) == 1 { - return v1.ImageConfig{}, errors.Errorf("no value given for instruction %q", ch) + key, vals, err := ParseChanges(ch) + if err != nil { + return v1.ImageConfig{}, err } - switch pair[0] { + + switch key { case "USER": - user = pair[1] + user = vals[0] case "EXPOSE": var st struct{} - exposedPorts[pair[1]] = st + exposedPorts[vals[0]] = st case "ENV": - if len(pair) < 3 { - return v1.ImageConfig{}, errors.Errorf("no value given for environment variable %q", pair[1]) + if len(vals) < 2 { + return v1.ImageConfig{}, errors.Errorf("no value given for environment variable %q", vals[0]) } - env = append(env, strings.Join(pair[1:], "=")) + env = append(env, strings.Join(vals[0:], "=")) case "ENTRYPOINT": - entrypoint = append(entrypoint, pair[1]) + // ENTRYPOINT and CMD can have array of strings + entrypoint = append(entrypoint, vals...) case "CMD": - cmd = append(cmd, pair[1]) + // ENTRYPOINT and CMD can have array of strings + cmd = append(cmd, vals...) case "VOLUME": var st struct{} - volumes[pair[1]] = st + volumes[vals[0]] = st case "WORKDIR": - workingDir = pair[1] + workingDir = vals[0] case "LABEL": - if len(pair) == 3 { - labels[pair[1]] = pair[2] + if len(vals) == 2 { + labels[vals[0]] = vals[1] } else { - labels[pair[1]] = "" + labels[vals[0]] = "" } case "STOPSIGNAL": - stopSignal = pair[1] + stopSignal = vals[0] } } |