// ENTRYPOINT /usr/sbin/nginx
//
// Set the entrypoint (which defaults to sh -c on linux, or cmd /S /C on Windows) to
// /usr/sbin/nginx. Will accept the CMD as the arguments to /usr/sbin/nginx.
//
// Handles command processing similar to CMD and RUN, only b.RunConfig.Entrypoint
// is initialized at NewBuilder time instead of through argument parsing.
//
func entrypoint(b *Builder, args []string, attributes map[string]bool, original string) error {
parsed := handleJSONArgs(args, attributes)
switch {
case attributes["json"]:
// ENTRYPOINT ["echo", "hi"]
b.RunConfig.Entrypoint = strslice.StrSlice(parsed)
case len(parsed) == 0:
// ENTRYPOINT []
b.RunConfig.Entrypoint = nil
default:
// ENTRYPOINT echo hi
if runtime.GOOS != "windows" {
b.RunConfig.Entrypoint = strslice.StrSlice{"/bin/sh", "-c", parsed[0]}
} else {
b.RunConfig.Entrypoint = strslice.StrSlice{"cmd", "/S", "/C", parsed[0]}
}
}
// when setting the entrypoint if a CMD was not explicitly set then
// set the command to nil
if !b.CmdSet {
b.RunConfig.Cmd = nil
}
return nil
}
// CMD foo
//
// Set the default command to run in the container (which may be empty).
// Argument handling is the same as RUN.
//
func cmd(b *Builder, args []string, attributes map[string]bool, original string) error {
cmdSlice := handleJSONArgs(args, attributes)
if !attributes["json"] {
if runtime.GOOS != "windows" {
cmdSlice = append([]string{"/bin/sh", "-c"}, cmdSlice...)
} else {
cmdSlice = append([]string{"cmd", "/S", "/C"}, cmdSlice...)
}
}
b.RunConfig.Cmd = strslice.StrSlice(cmdSlice)
if len(args) != 0 {
b.CmdSet = true
}
return nil
}