Add -t, --timestamps flag as option on logs.

Signed-off-by: Stéphane Seguin <stephseguin93@gmail.com>

compose/cli/log_printer.py

@@ -13,13 +13,19 @@ from compose.utils import split_buffer
 class LogPrinter(object):
     """Print logs from many containers to a single output stream."""
 
-    def __init__(self, containers, output=sys.stdout, monochrome=False,
-                 cascade_stop=False, follow=False):
+    def __init__(self,
+                 containers,
+                 output=sys.stdout,
+                 monochrome=False,
+                 cascade_stop=False,
+                 follow=False,
+                 timestamps=False):
         self.containers = containers
         self.output = utils.get_output_stream(output)
         self.monochrome = monochrome
         self.cascade_stop = cascade_stop
         self.follow = follow
+        self.timestamps = timestamps
 
     def run(self):
         if not self.containers:
@@ -43,7 +49,7 @@ class LogPrinter(object):
         for color_func, container in zip(color_funcs, self.containers):
             generator_func = get_log_generator(container)
             prefix = color_func(build_log_prefix(container, prefix_width))
-            yield generator_func(container, prefix, color_func, self.follow)
+            yield generator_func(container, prefix, color_func, self.follow, self.timestamps)
 
 
 def build_log_prefix(container, prefix_width):
@@ -66,7 +72,7 @@ def get_log_generator(container):
     return build_no_log_generator
 
 
-def build_no_log_generator(container, prefix, color_func, follow):
+def build_no_log_generator(container, prefix, color_func, follow, timestamps):
     """Return a generator that prints a warning about logs and waits for
     container to exit.
     """
@@ -77,12 +83,12 @@ def build_no_log_generator(container, prefix, color_func, follow):
         yield color_func(wait_on_exit(container))
 
 
-def build_log_generator(container, prefix, color_func, follow):
+def build_log_generator(container, prefix, color_func, follow, timestamps):
     # if the container doesn't have a log_stream we need to attach to container
     # before log printer starts running
     if container.log_stream is None:
         stream = container.logs(stdout=True, stderr=True, stream=True,
-                                follow=follow)
+                                follow=follow, timestamps=timestamps)
         line_generator = split_buffer(stream)
     else:
         line_generator = split_buffer(container.log_stream)

compose/cli/main.py

@@ -328,15 +328,17 @@ class TopLevelCommand(DocoptCommand):
         Usage: logs [options] [SERVICE...]
 
         Options:
-            --no-color      Produce monochrome output.
-            -f, --follow    Follow log output
+            --no-color          Produce monochrome output.
+            -f, --follow        Follow log output
+            -t, --timestamps    Show timestamps
         """
         containers = project.containers(service_names=options['SERVICE'], stopped=True)
 
         monochrome = options['--no-color']
         follow = options['--follow']
+        timestamps = options['--timestamps']
         print("Attaching to", list_containers(containers))
-        LogPrinter(containers, monochrome=monochrome, follow=follow).run()
+        LogPrinter(containers, monochrome=monochrome, follow=follow, timestamps=timestamps).run()
 
     def pause(self, project, options):
         """

docs/reference/logs.md

@@ -15,8 +15,9 @@ parent = "smn_compose_cli"
 Usage: logs [options] [SERVICE...]
 
 Options:
---no-color  Produce monochrome output.
--f, --follow    Follow log output
+--no-color          Produce monochrome output.
+-f, --follow        Follow log output
+-t, --timestamps    Show timestamps
 ```
 
 Displays log output from services.

tests/acceptance/cli_test.py

@@ -1163,6 +1163,14 @@ class CLITestCase(DockerClientTestCase):
         assert result.stdout.count('\n') >= 1
         assert 'exited with code 0' not in result.stdout
 
+    def test_logs_timestamps(self):
+        self.base_dir = 'tests/fixtures/echo-services'
+        self.dispatch(['up', '-d'], None)
+
+        result = self.dispatch(['logs', '-f', '-t'], None)
+
+        self.assertRegexpMatches(result.stdout, '(\d{4})-(\d{2})-(\d{2})T(\d{2})\:(\d{2})\:(\d{2})')
+
     def test_kill(self):
         self.dispatch(['up', '-d'], None)
         service = self.project.get_service('simple')