Overriding the prefix from the command line.

README.md

@@ -155,11 +155,18 @@ such case, you can pass the ```--force``` option:
 
 ## Overriding the destination bucket
 
-You can now override the destination bucket using the --bucket switch.
+You can override the destination bucket using the --bucket switch.
 The command is:
 
     $ middleman s3_sync --bucket=my.new.bucket
 
+## Overriding the destination prefix
+
+You can override the destination prefix using the `--prefix` switch. The
+command is:
+
+    $ middleman s3_sync --prefix=my/new/prefix
+
 ## Pushing to a folder within a bucket
 
 You can push to a folder within an S3 bucket by adding using the prefix

lib/middleman-s3_sync/commands.rb

@@ -20,6 +20,9 @@ def self.exit_on_failure?
       method_option :bucket, type: :string,
         desc: "Specify which bucket to use, overrides the configured bucket.",
         aliases: '-b'
+      method_option :prefix, type: :string,
+        desc: "Specify which prefix to use, overrides the configured prefix.",
+        aliases: '-p'
       method_option :verbose, type: :boolean,
         desc: "Adds more verbosity...",
         aliases: '-v'
@@ -37,6 +40,7 @@ def s3_sync
         s3_sync_options.force = options[:force] if options[:force]
         s3_sync_options.bucket = options[:bucket] if options[:bucket]
         s3_sync_options.verbose = options[:verbose] if options[:verbose]
+        s3_sync_options.prefix  = options[:prefix] if options[:prefix]
 
         ::Middleman::S3Sync.sync(s3_sync_options)
       end

lib/middleman/s3_sync/version.rb

@@ -1,5 +1,5 @@
 module Middleman
   module S3Sync
-    VERSION = "3.0.45"
+    VERSION = "3.0.46"
   end
 end