Log message about --one being removed

atom.sh

@@ -11,14 +11,14 @@ else
   exit 1
 fi
 
-while getopts ":wtfvh-:" opt; do
+while getopts ":wtfvh1-:" opt; do
   case "$opt" in
     -)
       case "${OPTARG}" in
         wait)
           WAIT=1
           ;;
-        help|version)
+        help|version|one)
           REDIRECT_STDERR=1
           EXPECT_OUTPUT=1
           ;;
@@ -30,7 +30,7 @@ while getopts ":wtfvh-:" opt; do
     w)
       WAIT=1
       ;;
-    h|v)
+    h|v|1)
       REDIRECT_STDERR=1
       EXPECT_OUTPUT=1
       ;;

src/browser/main.coffee

@@ -121,8 +121,16 @@ parseCommandLine = ->
   options.alias('v', 'version').boolean('v').describe('v', 'Print the version.')
   options.alias('w', 'wait').boolean('w').describe('w', 'Wait for window to be closed before returning.')
   options.string('socket-path')
+  options.alias('1', 'one').boolean('one') # Deprecated 1.0 API preview flag
   args = options.argv
 
+  if args.one
+    process.stdout.write """
+      The -1/--one option has been removed. Atom now defaults to launching with
+      the 1.0 API. Use --include-deprecated-apis to run Atom with deprecated APIs.
+
+    """
+
   if args.help
     process.stdout.write(options.help())
     process.exit(0)