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builder/dockerfile: improve error message about build stage name

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Signed-off-by: Akihiro Suda <suda.akihiro@lab.ntt.co.jp>
This commit is contained in:
Akihiro Suda 2017-04-05 06:08:07 +00:00
parent 2daa2b894c
commit 50a9be4bf5
2 changed files with 1 additions and 2 deletions
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2
builder/dockerfile/dispatchers.go
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@ -211,7 +211,7 @@ func from(b *Builder, args []string, attributes map[string]bool, original string
return errors.Errorf("invalid name for build stage: %q, name can't start with a number or contain symbols", ctxName)
}
} else if len(args) != 1 {
return errExactlyOneArgument("FROM")
return errors.New("FROM requires either one or three arguments")
}
if err := b.flags.Parse(); err != nil {

1
builder/dockerfile/dispatchers_test.go
View file

@ -20,7 +20,6 @@ type commandWithFunction struct {
func TestCommandsExactlyOneArgument(t *testing.T) {
commands := []commandWithFunction{
{"MAINTAINER", func(args []string) error { return maintainer(nil, args, nil, "") }},
{"FROM", func(args []string) error { return from(nil, args, nil, "") }},
{"WORKDIR", func(args []string) error { return workdir(nil, args, nil, "") }},
{"USER", func(args []string) error { return user(nil, args, nil, "") }},
{"STOPSIGNAL", func(args []string) error { return stopSignal(nil, args, nil, "") }}}