Only emit "interactive" output if stdout supports colors.

Only emit "interactive" output if stdout supports colors.

Committed: https://code.google.com/p/dart/source/detail?r=20991

[kustermann, 2013-04-05 17:16:48]

lgtm

[ahe, 2013-04-05 18:02:11]

Thank you, Martin.

I added some comments as well.

[ahe, 2013-04-05 18:02:39]

Committed patchset #3 manually as r20991 (presubmit successful).

[Ivan Posva, 2013-04-05 20:30:06]

DBC

Now I get one huge line, followed by duplicated output. Paste the text below
into an 80-wide Terminal.

-Ivan


=== BUILD AGGREGATE TARGET generate_async_cc_file OF PROJECT dart-runtime WITH
C=== BUILD AGGREGATE TARGET generate_async_patch_cc_file OF PROJECT dart-runtime
=== BUILD AGGREGATE TARGET generate_corelib_cc_file OF PROJECT dart-runtime
WITH=== BUILD AGGREGATE TARGET generate_corelib_patch_cc_file OF PROJECT
dart-runtim=== BUILD AGGREGATE TARGET generate_collection_cc_file OF PROJECT
dart-runtime W=== BUILD AGGREGATE TARGET generate_collection_patch_cc_file OF
PROJECT dart-run=== BUILD AGGREGATE TARGET generate_collection_dev_cc_file OF
PROJECT dart-runti=== BUILD AGGREGATE TARGET generate_crypto_cc_file OF PROJECT
dart-runtime WITH === BUILD AGGREGATE TARGET generate_math_cc_file OF PROJECT
dart-runtime WITH CO=== BUILD AGGREGATE TARGET generate_math_patch_cc_file OF
PROJECT dart-runtime W=== BUILD AGGREGATE TARGET generate_isolate_cc_file OF
PROJECT dart-runtime WITH=== BUILD AGGREGATE TARGET
generate_isolate_patch_cc_file OF PROJECT dart-runtim=== BUILD AGGREGATE TARGET
generate_json_cc_file OF PROJECT dart-runtime WITH CO=== BUILD AGGREGATE TARGET
generate_json_patch_cc_file OF PROJECT dart-runtime W=== BUILD AGGREGATE TARGET
generate_mirrors_cc_file OF PROJECT dart-runtime WITH=== BUILD AGGREGATE TARGET
generate_mirrors_patch_cc_file OF PROJECT dart-runtim=== BUILD AGGREGATE TARGET
generate_typeddata_cc_file OF PROJECT dart-runtime WI=== BUILD AGGREGATE TARGET
generate_typeddata_patch_cc_file OF PROJECT dart-runt=== BUILD AGGREGATE TARGET
generate_uri_cc_file OF PROJECT dart-runtime WITH CON=== BUILD AGGREGATE TARGET
generate_utf_cc_file OF PROJECT dart-runtime WITH CON=== BUILD NATIVE TARGET
libdart_lib_withcore OF PROJECT dart-runtime WITH CONFIG=== BUILD NATIVE TARGET
libdart_lib OF PROJECT dart-runtime WITH CONFIGURATION D=== BUILD NATIVE TARGET
libdart_vm OF PROJECT dart-runtime WITH CONFIGURATION De=== BUILD NATIVE TARGET
libjscre OF PROJECT dart-runtime WITH CONFIGURATION Debu=== BUILD NATIVE TARGET
libdouble_conversion OF PROJECT dart-runtime WITH CONFIG=== BUILD NATIVE TARGET
libdart_dependency_helper OF PROJECT dart-runtime WITH C=== BUILD AGGREGATE
TARGET generate_version_cc_file OF PROJECT dart-runtime WITH=== BUILD NATIVE
TARGET libdart OF PROJECT dart-runtime WITH CONFIGURATION Debug=== BUILD
AGGREGATE TARGET pkg_packages OF PROJECT pkg WITH CONFIGURATION DebugI=== BUILD
AGGREGATE TARGET runtime_packages OF PROJECT dart-runtime WITH CONFIGU=== BUILD
AGGREGATE TARGET generate_snapshot_test_dat_file OF PROJECT dart-runti=== BUILD
AGGREGATE TARGET generate_builtin_cc_file OF PROJECT dart-runtime WITH=== BUILD
AGGREGATE TARGET generate_io_cc_file OF PROJECT dart-runtime WITH CONF=== BUILD
AGGREGATE TARGET generate_io_patch_cc_file OF PROJECT dart-runtime WIT=== BUILD
NATIVE TARGET libdart_builtin OF PROJECT dart-runtime WITH CONFIGURATI=== BUILD
NATIVE TARGET libdart_io OF PROJECT dart-runtime WITH CONFIGURATION De=== BUILD
NATIVE TARGET libdart_withcore OF PROJECT dart-runtime WITH CONFIGURAT=== BUILD
NATIVE TARGET gen_snapshot OF PROJECT dart-runtime WITH CONFIGURATION === BUILD
AGGREGATE TARGET generate_snapshot_bin OF PROJECT dart-runtime WITH CO=== BUILD
AGGREGATE TARGET generate_snapshot_bin OF PROJECT dart-runtime WITH
CONFIGURATION DebugIA32 ===