Method ScriptLines

devcontainer/script.go:147–170

ScriptLines returns shell syntax for executing the commands in the LifecycleScript. TODO: Technically the commands could be executed in parallel, but that would add a bit of complexity to do portably.

()

// TODO: Technically the commands could be executed in parallel, but that would
// add a bit of complexity to do portably.
func (s *LifecycleScript) ScriptLines() string {
	var lines string
	for _, command := range s.shellCommands {
		lines += command + "\n"
	}
	for _, commandAndArgs := range s.nonShellCommands {
		// Quote the command arguments to prevent shell interpretation.
		quotedCommandAndArgs := make([]string, len(commandAndArgs))
		for i := range commandAndArgs {
			// Surround each argument with single quotes. If the
			// argument contains any single quotes, they are escaped
			// by replacing them with the sequence '"'"'. This
			// sequence ends the current single-quoted string,
			// starts and immediately ends a double-quoted string
			// containing a single quote, and then restarts the
			// single-quoted string. This approach works because in
			// shell syntax, adjacent strings are concatenated, so
			// 'arg'"'"'arg' is interpreted as arg'arg.
			quotedCommandAndArgs[i] = "'" + strings.ReplaceAll(commandAndArgs[i], "'", "'\"'\"'") + "'"
		}
		lines += strings.Join(quotedCommandAndArgs, " ") + "\n"
	}
	return lines
}