Redirects any usage of --help or -h flag for a command to that command's help

- Any usage of `--help` or `-h` as a flag, whether it's before or after
  the command, will now pull up the help for that command.

The following are all equivalent:
```
bundle help install
bundle install --help
bundle install -h
bundle --help install
bundle -h install
```

1 files changed, 7 insertions, 1 deletions

diff --git a/exe/bundle b/exe/bundle
index 5baa52235a..a6068daad3 100755
--- a/exe/bundle
+++ b/exe/bundle
@@ -16,5 +16,11 @@ end
 require "bundler/friendly_errors"
 Bundler.with_friendly_errors do
   require "bundler/cli"
-  Bundler::CLI.start(ARGV, :debug => true)
+
+  # Allow any command to use --help flag to show help for that command
+  help_flags = %w(--help -h)
+  help_flag_used = ARGV.any? {|a| help_flags.include? a }
+  args = help_flag_used ? Bundler::CLI.reformatted_help_args(ARGV) : ARGV
+
+  Bundler::CLI.start(args, :debug => true)
 end