Change file output to stdout

tensorflow/tools/dockerfiles/README.md

@@ -92,6 +92,9 @@ $ asm_dockerfiles --release dockerfiles --construct_dockerfiles
 # Build all of the "nightly" images on your local machine:
 $ asm_images --release nightly --build_images
 
+# Save the list of built images to a file:
+$ asm_images --release nightly --build_images > tf-built.txt
+
 # Build version release for version 99.0, except "gpu" tags:
 $ asm_images --release versioned --arg _TAG_PREFIX=99.0 --build_images --exclude_tags_matching '.*gpu.*'
 

tensorflow/tools/dockerfiles/assembler.py

@@ -18,6 +18,9 @@
 - Builds images (and optionally runs image tests)
 - Pushes images to Docker Hub (provided with credentials)
 
+Logs are written to stderr; the list of successfully built images is
+written to stdout.
+
 Read README.md (in this directory) for instructions!
 """
 
@@ -676,13 +679,10 @@ def main(argv):
         'errors: {}'.format(','.join(failed_tags)))
     exit(1)
 
-  if FLAGS.write_tags_to:
-    eprint('> Writing built{} tags to {}.'.format(
-        ' and tested' if FLAGS.run_tests_path else '',
-        FLAGS.write_tags_to))
-    with open(FLAGS.write_tags_to, 'w') as f:
-      for tag in succeeded_tags:
-        f.write('{}:{}\n'.format(FLAGS.repository, tag))
+  eprint('> Writing built{} tags to standard out.'.format(
+      ' and tested' if FLAGS.run_tests_path else ''))
+  for tag in succeeded_tags:
+    print('{}:{}'.format(FLAGS.repository, tag))
 
 
 if __name__ == '__main__':